WO1996037584A1 - Lubricating oil composition - Google Patents
Lubricating oil composition Download PDFInfo
- Publication number
- WO1996037584A1 WO1996037584A1 PCT/US1995/006621 US9506621W WO9637584A1 WO 1996037584 A1 WO1996037584 A1 WO 1996037584A1 US 9506621 W US9506621 W US 9506621W WO 9637584 A1 WO9637584 A1 WO 9637584A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- weight
- lubricant
- oil composition
- composition
- lubricant oil
- Prior art date
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 44
- 239000010687 lubricating oil Substances 0.000 title claims description 3
- 239000000314 lubricant Substances 0.000 claims abstract description 52
- KZNICNPSHKQLFF-UHFFFAOYSA-N succinimide Chemical compound O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 claims abstract description 40
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052796 boron Inorganic materials 0.000 claims abstract description 28
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 22
- 239000011701 zinc Substances 0.000 claims abstract description 22
- 229960002317 succinimide Drugs 0.000 claims abstract description 20
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 18
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 14
- PICWHVQPMXIVDC-UHFFFAOYSA-J C(N)([S-])=S.O(S(=O)(=O)O)[Mo+3].C(N)([S-])=S.C(N)([S-])=S Chemical compound C(N)([S-])=S.O(S(=O)(=O)O)[Mo+3].C(N)([S-])=S.C(N)([S-])=S PICWHVQPMXIVDC-UHFFFAOYSA-J 0.000 claims abstract description 11
- 239000002199 base oil Substances 0.000 claims abstract description 9
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 7
- 239000011733 molybdenum Substances 0.000 claims abstract description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 3
- 239000011574 phosphorus Substances 0.000 claims abstract description 3
- 125000001183 hydrocarbyl group Chemical group 0.000 claims abstract 2
- 229910019142 PO4 Inorganic materials 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims 1
- 239000003921 oil Substances 0.000 abstract description 64
- 238000002485 combustion reaction Methods 0.000 abstract description 13
- 230000003247 decreasing effect Effects 0.000 abstract description 3
- 230000003139 buffering effect Effects 0.000 abstract description 2
- -1 for example Substances 0.000 description 21
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 8
- 230000007935 neutral effect Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 150000002430 hydrocarbons Chemical group 0.000 description 5
- 230000003405 preventing effect Effects 0.000 description 5
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 239000003963 antioxidant agent Substances 0.000 description 4
- 125000004429 atom Chemical group 0.000 description 4
- 239000003599 detergent Substances 0.000 description 4
- 235000014113 dietary fatty acids Nutrition 0.000 description 4
- 239000000194 fatty acid Substances 0.000 description 4
- 229930195729 fatty acid Natural products 0.000 description 4
- 239000002480 mineral oil Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 3
- 238000005984 hydrogenation reaction Methods 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 125000003342 alkenyl group Chemical group 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 229910052788 barium Inorganic materials 0.000 description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 2
- 239000012208 gear oil Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
- KHYKFSXXGRUKRE-UHFFFAOYSA-J molybdenum(4+) tetracarbamodithioate Chemical compound C(N)([S-])=S.[Mo+4].C(N)([S-])=S.C(N)([S-])=S.C(N)([S-])=S KHYKFSXXGRUKRE-UHFFFAOYSA-J 0.000 description 2
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 150000005846 sugar alcohols Polymers 0.000 description 2
- 125000002889 tridecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- WMYJOZQKDZZHAC-UHFFFAOYSA-H trizinc;dioxido-sulfanylidene-sulfido-$l^{5}-phosphane Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S WMYJOZQKDZZHAC-UHFFFAOYSA-H 0.000 description 2
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical compound C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 description 1
- JBIJLHTVPXGSAM-UHFFFAOYSA-N 2-naphthylamine Chemical class C1=CC=CC2=CC(N)=CC=C21 JBIJLHTVPXGSAM-UHFFFAOYSA-N 0.000 description 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
- BDDYLPHEMMIRQV-UHFFFAOYSA-J C(CCCCCCCCCCCC)N(C([S-])=S)CCCCCCCCCCCCC.O(S(=O)(=O)O)[Mo+3].C(CCCCCCCCCCCC)N(C([S-])=S)CCCCCCCCCCCCC.C(CCCCCCCCCCCC)N(C([S-])=S)CCCCCCCCCCCCC Chemical compound C(CCCCCCCCCCCC)N(C([S-])=S)CCCCCCCCCCCCC.O(S(=O)(=O)O)[Mo+3].C(CCCCCCCCCCCC)N(C([S-])=S)CCCCCCCCCCCCC.C(CCCCCCCCCCCC)N(C([S-])=S)CCCCCCCCCCCCC BDDYLPHEMMIRQV-UHFFFAOYSA-J 0.000 description 1
- KXDHJXZQYSOELW-UHFFFAOYSA-M Carbamate Chemical compound NC([O-])=O KXDHJXZQYSOELW-UHFFFAOYSA-M 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- MQHWFIOJQSCFNM-UHFFFAOYSA-L Magnesium salicylate Chemical compound [Mg+2].OC1=CC=CC=C1C([O-])=O.OC1=CC=CC=C1C([O-])=O MQHWFIOJQSCFNM-UHFFFAOYSA-L 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- GNVMUORYQLCPJZ-UHFFFAOYSA-M Thiocarbamate Chemical class NC([S-])=O GNVMUORYQLCPJZ-UHFFFAOYSA-M 0.000 description 1
- 150000004996 alkyl benzenes Chemical class 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 239000007866 anti-wear additive Substances 0.000 description 1
- 239000003849 aromatic solvent Substances 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- AVVIDTZRJBSXML-UHFFFAOYSA-L calcium;2-carboxyphenolate;dihydrate Chemical compound O.O.[Ca+2].OC1=CC=CC=C1C([O-])=O.OC1=CC=CC=C1C([O-])=O AVVIDTZRJBSXML-UHFFFAOYSA-L 0.000 description 1
- ZMRQTIAUOLVKOX-UHFFFAOYSA-L calcium;diphenoxide Chemical compound [Ca+2].[O-]C1=CC=CC=C1.[O-]C1=CC=CC=C1 ZMRQTIAUOLVKOX-UHFFFAOYSA-L 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 125000003493 decenyl group Chemical group [H]C([*])=C([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical class C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000012990 dithiocarbamate Substances 0.000 description 1
- 125000005066 dodecenyl group Chemical group C(=CCCCCCCCCCC)* 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000006317 isomerization reaction Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229940072082 magnesium salicylate Drugs 0.000 description 1
- 125000002960 margaryl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000006178 methyl benzyl group Chemical group 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 125000001421 myristyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 125000005187 nonenyl group Chemical group C(=CCCCCCCC)* 0.000 description 1
- 125000005064 octadecenyl group Chemical group C(=CCCCCCCCCCCCCCCCC)* 0.000 description 1
- 125000004365 octenyl group Chemical group C(=CCCCCCC)* 0.000 description 1
- GJYCVCVHRSWLNY-UHFFFAOYSA-N ortho-butylphenol Natural products CCCCC1=CC=CC=C1O GJYCVCVHRSWLNY-UHFFFAOYSA-N 0.000 description 1
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 125000002958 pentadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 239000002530 phenolic antioxidant Substances 0.000 description 1
- 150000008301 phosphite esters Chemical class 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- DOIRQSBPFJWKBE-UHFFFAOYSA-N phthalic acid di-n-butyl ester Natural products CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920013639 polyalphaolefin Polymers 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920001522 polyglycol ester Polymers 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 125000005063 tetradecenyl group Chemical group C(=CCCCCCCCCCCCC)* 0.000 description 1
- RYYWUUFWQRZTIU-UHFFFAOYSA-K thiophosphate Chemical class [O-]P([O-])([O-])=S RYYWUUFWQRZTIU-UHFFFAOYSA-K 0.000 description 1
- 125000005040 tridecenyl group Chemical group C(=CCCCCCCCCCCC)* 0.000 description 1
- 125000005065 undecenyl group Chemical group C(=CCCCCCCCCC)* 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- BIAHYOWYQSZQOY-UHFFFAOYSA-L zinc;(3-ethyl-2-methylhexan-3-yl)sulfanyl-dioxido-sulfanylidene-$l^{5}-phosphane Chemical compound [Zn+2].CCCC(CC)(C(C)C)SP([O-])([O-])=S BIAHYOWYQSZQOY-UHFFFAOYSA-L 0.000 description 1
- MBBWTVUFIXOUBE-UHFFFAOYSA-L zinc;dicarbamodithioate Chemical compound [Zn+2].NC([S-])=S.NC([S-])=S MBBWTVUFIXOUBE-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M141/00—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
- C10M141/10—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic phosphorus-containing compound
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
- C10M133/52—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of 30 or more atoms
- C10M133/56—Amides; Imides
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
- C10M135/12—Thio-acids; Thiocyanates; Derivatives thereof
- C10M135/14—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond
- C10M135/18—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond thiocarbamic type, e.g. containing the groups
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
- C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
- C10M137/04—Phosphate esters
- C10M137/10—Thio derivatives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
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Definitions
- the present invention relates to a novel lubricant oil composition. More specifically, the present invention relates to a lubricant oil composition, being preferable as a lubricant oil for automobiles, including lubricant oils for internal combustion engines such as automobile engines, gear oil, ATF oil (automatic transmission fuel oil), and shock absorber oil, and having a lower coefficient of friction under a wide range of utility, particularly under operating conditions with oil temperatures at medium to low degrees and low-speed rotation.
- lubricant oils for internal combustion engines such as automobile engines, gear oil, ATF oil (automatic transmission fuel oil), and shock absorber oil
- Lubricant oils have been used in internal combustion engines, automatic transmissions, buffering systems and power steering and in gears, etc., for smoothing the operation thereof.
- lubricant oils for internal combustion engines serve roles for cooling the inside of engines and cleansing and dispersing combustion products, and in preventing rust and corrosion, other than just for lubricating various sliding parts including piston rings and cylinder liners, bearings for crank shafts and connecting rods, valve driving systems including cam and valve lifter.
- lubricant oils for internal combustion engines to insure smooth operation and prevent abrasion and seizure under any condition.
- Engine lubricating parts are mostly in the state of fluid lubrication, but vertical points in valve trains and pistons readily fall into the state of interface lubrication. Under such interface lubrication, the abrasion preventing properties are generally provided by addition of zinc dithiophosphate and zinc dithiocarbamate.
- the present invention has been carried out for the objective to provide a lubricant oil composition having a lower coefficient of friction under a wide variety of conditions of utility, particularly under operating conditions of oil temperatures of medium and low degrees and low-speed rotation.
- the present inventors have made intensive investigations to develop a lubricant oil composition having the aforementioned preferable properties. Consequently, the inventors have found that the objective can be attained with a lubricant oil composition comprising a lubricant base oil blended with a specific ratio of sulfoxymolybdenum dithiocarbamate having a specific alkyl group, zinc dialkyl ⁇ dithiophosphate having a specific alkyl group and succinimide containing boron.
- the present invention has been achieved on the basis of the finding.
- the present invention is to provide a lubricant oil composition
- a lubricant oil composition compris ⁇ ing a lubricant base oil blended with (A) sulfoxymolybdenum dithiocarbamate with a hydrocarbon group having 8 to 18 carbon atoms, (B) zinc dialkyldithiophosphate with a primary alkyl group having 1 to 18 carbon atoms, and (C) succinimide containing boron, wherein to the total amount of the composition, the molybdenum content derived from sulfoxymolybdenum dithiocarbamate is 200 to 1,000 ppm (ratio by weight) and the phosphorus content derived from zinc dialkyldithiophosphate is at 0.04 to 0.15% by weight and the boron content derived from succinimide containing boron is at 0.005 to 0.06% by weight.
- any lubricant base oil can be used, without specific limitation, in the lubricant oil composition in accordance with the present invention, and the conventional lubricant base oils may be used, including mineral oils and synthetic oils.
- the mineral oil includes hydrogenation processed oils produced by hydrogenation with hydrogenation catalysts such as cobalt and molybdenum along with carriers such as raffinate generated by solvent purification of a lubricant oil raw material using an aromatic solvent for extraction, such as phenol and furfural; or mineral oils, for example, lubricant distillate produced by isomerization of waxes, such as 60 Neutral Oil, 100 Neutral Oil, 150 Neutral Oil, 300 Neutral Oil, 500 Neutral Oil, Brite Stock and the like.
- the synthetic oil includes poly- ⁇ -olefin oligomer, polybutene, alkylbenzene, polyol ester, polyglycol ester, dibasic acid ester, phosphate ester, silicone oil and the like.
- These base oils may be used singly or in combination of two or more thereof, and such mineral oil may be mixed and used with such synthetic oil. It is preferable that the base oil has a kinematic viscosity generally in a range of 3 to 20 cSt at a temperature or 100°C.
- the hydrocarbon group with 8 to 18 carbon atoms which is represented by R* and R ⁇ in the aforementioned general formula (1), includes for example an alkyl group with 8 to 18 carbon atoms, an alkenyl group with 8 to 18 carbon atoms, a cyclo- alkyl group with 8 to 18 carbon atoms, an allyl group with 8 to 18 carbon atoms, an alkylallyl group, an allylalkyl group and the like.
- the alkyl group and the alkenyl group may be in the form of linear chain or in the form of branched chain.
- the carbon number of the hydrocarbon group, which is represented by R* and R ⁇ is particularly preferably 8.
- hydrocarbon group represented by ⁇ S and R ⁇ include octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tridecenyl, tetradecenyl, hexadecenyl, octadecenyl, dimethy- cyclohexyl, ethylcyclohexyl, methylcyclohexylmethyl, cyclohexylethyl, propylcyclohexyl, butylcyclohexyl, heptlcyclohexyl, dimethylphenyl, methylbenzyl, phenetyl, naphthyl, dimethylnaphthyl and the like.
- sulfoxy ⁇ molybdenum dithiocarbamate may be used singly or in combination of two or more of its species.
- Sulfoxymolybdenum dithiocarbamate may be blended so that the molybdenum content derived from sulfoxymolybdenum dithiocarbamate might be 200 to 1,000 ppm (ratio by weight), preferably 300 to 800 ppm (ratio by weight) based on the total weight of the composition.
- the amount of blended sulfoxymolybdenum dithiocarbamate is less than an amount at which the molybdenum content derived from sulfoxy ⁇ molybdenum dithiocarbamate is less than 200 ppm (ratio by weight) based on the total weight of the composition, the effect on improving the wear properties cannot be exhibited satisfactorily; when the content of blended sulfoxymolybdenum dithio ⁇ carbamate exceeds an amount at which the molybdenum content derived from sulfoxymolybdenum dithiocarbamate is 1,000 ppm (ratio by weight) based on the total weight of the composition, the effect on improving the wear properties cannot be exhibited proportionally to the content, readily inducing sludge or the like.
- R ⁇ and R ⁇ are independently a primary alkyl group with 1 to 18 carbon atoms and may or may not be the same).
- the primary alkyl group represented by R- and R ⁇ in the aforementioned general formula (2) includes methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl groups, and zinc dialkyldithiophosphate having a primary alkyl group with 3 to 12 carbon atoms is preferably used as the lubricant oil composition of the present invention.
- the alkyl groups of zinc dialkyldithiophosphate are exclusively primary alkyl groups, as satisfactory improvement of the wear properties cannot be yielded when the alkyl group is secondary or tertiary.
- zinc dialkyl ⁇ dithiophosphate with a primary alkyl group may be used singly or in combination of two or more of such species. Additionally, zinc dialkyldithiophosphate should be blended so that the phosphorous content derived from dialkyldithiophosphate might be 0.04 to 0.15% by weight, in terms of phosphorous preferably 0.06 to 0.12% by weight in terms of phosphorous based on the total weight of the composition.
- the blended amount of zinc dialkyldithiophosphate is an amount such that the phosphorous content derived from zinc dialkyldithiophosphate might be less than 0.04% by weight based on the total weight of the composition, neither satisfactory wear resistance nor satisfactorily lower coefficient of friction under operating conditions of an oil temperature of medium to low degrees and low-speed rotation can be yielded; if the blended amount of zinc dialkyl ⁇ dithiophosphate is an amount such that the phosphorous content derived from zinc dialkyldithiophosphate might be above 0.15% by weight based on the total weight of the composition, the effect cannot be improved in proportion to the amount.
- the ratio in the number of atoms of boron to nitrogen in succinimide containing boron to be used in the lubricant oil composition of the present invention is 0.05 to 1.5, preferably 0.1 to 0.8.
- the ratio in the number of atoms of boron to nitrogen is less than 0.05, the wear properties cannot be satisfactorily improved; or the wear properties might be deteriorated if the ratio in the number of atoms of boron to nitrogen is above 1.5
- succinimide containing boron should be blended at an amount such that the boron content derived from succinimide containing boron is 0.005 to 0.06% by weight, preferably 0.01 to 0.04% by weight based on the total weight of the composition.
- the blended amount of succinimide containing boron is an amount such that the boron content derived from succinimide containing boron is less than 0.005% by weight based on the total weight of the composition, the wear properties cannot be improved satisfactorily; if the blended amount of succinimide containing boron is an amount such that the boron content derived from succinimide containing boron is above 0.06% by weight based on the total weight of the composition, the effect cannot be improved proportionally.
- succinimide containing boron may be used singly or in combination of two or more of such species.
- additives conventionally used in lubricant oils may be added to the lubricant oil composi- tion of the present invention, including for example metallic cleansing agents, other wear adjustors, antioxidants, viscosity improvers, viscosity index improvers, pour point depressants, defoaming agents, other abrasion resistant agents, rust preventing agents, anti-corrosion agents and the like.
- the metallic cleansing agents include calcium sulfonate, magnesium sulfonate, barium sulfonate, calcium phenate, barium phenate, calcium salicylate, magnesium salicylate and the like, and these may be used generally in an amount of 0.1 to 5% by weight.
- the wear adjustors include for example polyhydric alcohol esters, amines, amides, sulfoesters and the like.
- the antioxidants include for example amine antioxidants such as alkylated diphenylamine, phenyl-a-naphthylamine, alkylated a-naphthylamine, phenolic antioxidants such as 2,6-di-t-butyl-4-methyl phenol, and 4,4-methylene bis (2,6-di-t- butyl phenol), and the like. These may be used generally in an amount of 0.05 to 2% by weight.
- amine antioxidants such as alkylated diphenylamine, phenyl-a-naphthylamine, alkylated a-naphthylamine
- phenolic antioxidants such as 2,6-di-t-butyl-4-methyl phenol, and 4,4-methylene bis (2,6-di-t- butyl phenol), and the like. These may be used generally in an amount of 0.05 to 2% by weight.
- the improvers of coefficients of viscosity include for example poly- methacrylate, polyisobutylene, ethylene-propylene copolymers, styrene-butadiene hydrogenated copolymers and the like. These may be used generally in an amount of 0.5 to 35% by weight.
- the decreasing agents of flowing points include for example poly- alkylmethacrylate, chlorinated paraffin-naphthalene condensate, alkylated polystyrene and the like.
- the defoaming agents include for example dimethylpolysiloxane and polyacrylic acid and the like.
- the wear resistant agents include for example metal salts of thio- phosphate, metal salts of thiocarbamate, sulfur compounds, phosphate esters, phosphite esters and the like. These may be used generally in an amount of 0.05 to 5.0% by weight.
- the rust preventing agents include for example fatty acid, alkenylsuccinic acid semiester, fatty acid soap, alkylsulfonate salts, polyhydric alcohol esters of fatty acid, fatty acid amines, oxidated paraffin, alkylpolyoxyethylene either and the like.
- the anti-corrosion agents include for example benzotriazole, benzoimidazole and the like.
- the coefficients of friction of lubricant oil compositions were measured by using a sliding reciprocating friction tester (SRV friction tester) at a 50-Hz frequency, a 3-mm vibration amplitude, a 25-N load, a temperature of 80°C, a testing period of 25 mintues.
- SRV friction tester sliding reciprocating friction tester
- Lubricant oil compositions containing a base oil 100 Neutral Oil at a viscosity of 4.4 rnm/s ⁇ at 100°C
- a base oil 100 Neutral Oil at a viscosity of 4.4 rnm/s ⁇ at 100°C
- each of the individual blending components of the types and amounts shown in Table 1 2.0% weight of calcium sulfonate as a metallic cleansing agent, were prepared, and their coefficients of friction were measured. The results are shown in Table 1.
- lubricant oil compositions of Examples 1 to 8 in accordance with the present invention have lower coefficients of friction and excellent wear properties.
- the lubricant oil composition of Comparative Example 1 blended with zinc dialkyldithiophosphate having a secondary alkyl group
- the lubricant oil composition of Comparative Example 2 blended with succinimide instead of succinimide containing boron
- the lubricant oil composition of Comparative Example 3 with phosphorous content of 0.03% by weight derived from zinc dialkyl ⁇ dithiophosphate having a primary alkyl group, have higher coefficients of friction, so that their wear properties are not satisfactory.
- the lubricant oil composition of the present invention can exhibit burffing effects by being strongly adsorbed onto the wear face under operation conditions of oil temperatures of medium to low degrees and low-speed rotation, thereby decreasing the coefficienbt of friction.
- the lubricant oil composition of the present invention is preferably uised as lubricant oils for automobiles such as a lubricant oil for internal combustion engines, gear oil, automatic transmission fluids, and shock absorber oils.
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Abstract
A lubricant oil composition comprising a lubricant base oil blended with (A) sulfoxymolybdenum dithiocarbamate with a hydrocarbon group having 8 to 18 carbon atoms, (B) zinc dialkyldithiophosphate consisting of zinc dialkyldithiophosphate containing alkyl groups which are exclusively primary alkyl groups having 1 to 18 carbon atoms, and (C) succinimide containing boron, wherein to the total amount of the composition, the molybdenum content is 200 to 1,000 ppm (ratio by weight) and the phosphorus amount derived from zinc dialkyldithiophosphate is 0.04 to 0.15 % by weight and the boron amount derived from succinimide containing boron is 0.005 to 0.06 % by weight. The lubricant oil composition of the present invention can exhibit buffering effects by being strongly adsorbed onto the wear face under operating conditions of oil temperatures of medium to low degrees and low-speed rotation, thereby decreasing the coefficient of friction. The present lubricant oil composition is preferably used as lubricant oils for an internal combustion of an automobile engine and the like.
Description
LUBRICATING OIL COMPOSITION
Background of the Invention
Field of the Invention
The present invention relates to a novel lubricant oil composition. More specifically, the present invention relates to a lubricant oil composition, being preferable as a lubricant oil for automobiles, including lubricant oils for internal combustion engines such as automobile engines, gear oil, ATF oil (automatic transmission fuel oil), and shock absorber oil, and having a lower coefficient of friction under a wide range of utility, particularly under operating conditions with oil temperatures at medium to low degrees and low-speed rotation.
Description of the Prior Art
Lubricant oils have been used in internal combustion engines, automatic transmissions, buffering systems and power steering and in gears, etc., for smoothing the operation thereof. Specifically, lubricant oils for internal combustion engines serve roles for cooling the inside of engines and cleansing and dispersing combustion products, and in preventing rust and corrosion, other than just for lubricating various sliding parts including piston rings and cylinder liners, bearings for crank shafts and connecting rods, valve driving systems including cam and valve lifter.
As has been described above, a wide variety of properties have been demanded for a lubricant oil for internal combustion engines, and additionally, better performance has been also required recently as the internal combustion engines have been developed for higher performance, higher power, and running conditions of higher severity. So as to satisfy such required properties, therefore, various additives, for example abrasion preventing agents, metal cleansing agents, ash-free dispersants, and antioxidants, are now routinely blended with lubricant oils for internal combustion engines.
It is an important function of lubricant oils for internal combustion engines to insure smooth operation and prevent abrasion and seizure under any condition. Engine lubricating parts are mostly in the state of fluid lubrication, but
vertical points in valve trains and pistons readily fall into the state of interface lubrication. Under such interface lubrication, the abrasion preventing properties are generally provided by addition of zinc dithiophosphate and zinc dithiocarbamate.
Because energy loss in the wear portions involving lubricant oils is large in internal combustion engines, furthermore, use may be made of a lubricant oil in combination with an anti-wear additive and a variety of other additives so as to minimize wear loss and improve fuel economy (see for example Japanese Patent Publication No. Hei 3-23595). Internal combustion engines of automobiles are operated at a wide variety of temperatures, rotation numbers and loads. In order to further improve fuel consumption, therefore, it is required that lubricant oils for internal combustion engines should be excellent in terms of wear properties under a wide range of operations.
In order to decrease the coefficient of friction, combined use of zinc dithiophosphate, succinimide, calcium sulfonate, sulfoxymolybdenum dithiocarbamate and the like has been employed conventionally. However, some of such lubricant oils have problems in that satisfactory coefficients of friction cannot be yielded under operating conditions of oil temperatures of medium and low degrees and low-speed rotation.
The present invention has been carried out for the objective to provide a lubricant oil composition having a lower coefficient of friction under a wide variety of conditions of utility, particularly under operating conditions of oil temperatures of medium and low degrees and low-speed rotation.
Summary of the Invention
The present inventors have made intensive investigations to develop a lubricant oil composition having the aforementioned preferable properties. Consequently, the inventors have found that the objective can be attained with a lubricant oil composition comprising a lubricant base oil blended with a specific ratio of sulfoxymolybdenum dithiocarbamate having a specific alkyl group, zinc dialkyl¬ dithiophosphate having a specific alkyl group and succinimide containing boron. The present invention has been achieved on the basis of the finding.
The present invention is to provide a lubricant oil composition compris¬ ing a lubricant base oil blended with (A) sulfoxymolybdenum dithiocarbamate with a hydrocarbon group having 8 to 18 carbon atoms, (B) zinc dialkyldithiophosphate with a primary alkyl group having 1 to 18 carbon atoms, and (C) succinimide containing boron, wherein to the total amount of the composition, the molybdenum content derived from sulfoxymolybdenum dithiocarbamate is 200 to 1,000 ppm (ratio by weight) and the phosphorus content derived from zinc dialkyldithiophosphate is at 0.04 to 0.15% by weight and the boron content derived from succinimide containing boron is at 0.005 to 0.06% by weight.
The present invention will now be explained in more details.
Any lubricant base oil can be used, without specific limitation, in the lubricant oil composition in accordance with the present invention, and the conventional lubricant base oils may be used, including mineral oils and synthetic oils. The mineral oil includes hydrogenation processed oils produced by hydrogenation with hydrogenation catalysts such as cobalt and molybdenum along with carriers such as raffinate generated by solvent purification of a lubricant oil raw material using an aromatic solvent for extraction, such as phenol and furfural; or mineral oils, for example, lubricant distillate produced by isomerization of waxes, such as 60 Neutral Oil, 100 Neutral Oil, 150 Neutral Oil, 300 Neutral Oil, 500 Neutral Oil, Brite Stock and the like. Alternatively, the synthetic oil includes poly-α-olefin oligomer, polybutene, alkylbenzene, polyol ester, polyglycol ester, dibasic acid ester, phosphate ester, silicone oil and the like. These base oils may be used singly or in combination of two or more thereof, and such mineral oil may be mixed and used with such synthetic oil. It is preferable that the base oil has a kinematic viscosity generally in a range of 3 to 20 cSt at a temperature or 100°C.
As the sulfoxymolybdenum dithiocarbamate to be used in the lubricant oil composition in accordance with the present invention, use may be made of a compound having the following formula (1);
[1]
Mo2sm0n
wherein R and R^, are independently a hydrocarbon group with 8 to 18 carbon atoms and may or may not be the same; m and n are independently a plus integer provided that m + n = 4.
The hydrocarbon group with 8 to 18 carbon atoms, which is represented by R* and R^ in the aforementioned general formula (1), includes for example an alkyl group with 8 to 18 carbon atoms, an alkenyl group with 8 to 18 carbon atoms, a cyclo- alkyl group with 8 to 18 carbon atoms, an allyl group with 8 to 18 carbon atoms, an alkylallyl group, an allylalkyl group and the like. The alkyl group and the alkenyl group may be in the form of linear chain or in the form of branched chain. In the lubricant oil composition of the present invention, the carbon number of the hydrocarbon group, which is represented by R* and R^, is particularly preferably 8.
Specific examples of the hydrocarbon group represented by λS and R^ include octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tridecenyl, tetradecenyl, hexadecenyl, octadecenyl, dimethy- cyclohexyl, ethylcyclohexyl, methylcyclohexylmethyl, cyclohexylethyl, propylcyclohexyl, butylcyclohexyl, heptlcyclohexyl, dimethylphenyl, methylbenzyl, phenetyl, naphthyl, dimethylnaphthyl and the like.
In the lubricant oil composition of the present invention, sulfoxy¬ molybdenum dithiocarbamate may be used singly or in combination of two or more of its species. Sulfoxymolybdenum dithiocarbamate may be blended so that the molybdenum content derived from sulfoxymolybdenum dithiocarbamate might be 200 to 1,000 ppm (ratio by weight), preferably 300 to 800 ppm (ratio by weight) based on the total weight of the composition. When the amount of blended sulfoxymolybdenum dithiocarbamate is less than an amount at which the molybdenum content derived from sulfoxy¬ molybdenum dithiocarbamate is less than 200 ppm (ratio by weight) based on the total weight of the composition, the effect on improving the wear properties cannot be
exhibited satisfactorily; when the content of blended sulfoxymolybdenum dithio¬ carbamate exceeds an amount at which the molybdenum content derived from sulfoxymolybdenum dithiocarbamate is 1,000 ppm (ratio by weight) based on the total weight of the composition, the effect on improving the wear properties cannot be exhibited proportionally to the content, readily inducing sludge or the like.
As the zinc dialkyldithiophosphate to be used in the lubricant oil composition in accordance with the present invention, use may be made of a compound represented by the following formula (2);
(wherein R^ and R^ are independently a primary alkyl group with 1 to 18 carbon atoms and may or may not be the same).
The primary alkyl group represented by R- and R^ in the aforementioned general formula (2) includes methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl groups, and zinc dialkyldithiophosphate having a primary alkyl group with 3 to 12 carbon atoms is preferably used as the lubricant oil composition of the present invention.
For the lubricant oil composition in accordance with the present inven¬ tion, the alkyl groups of zinc dialkyldithiophosphate are exclusively primary alkyl groups, as satisfactory improvement of the wear properties cannot be yielded when the alkyl group is secondary or tertiary.
In the lubricant oil composition of the present invention, zinc dialkyl¬ dithiophosphate with a primary alkyl group may be used singly or in combination of two or more of such species.
Additionally, zinc dialkyldithiophosphate should be blended so that the phosphorous content derived from dialkyldithiophosphate might be 0.04 to 0.15% by weight, in terms of phosphorous preferably 0.06 to 0.12% by weight in terms of phosphorous based on the total weight of the composition. If the blended amount of zinc dialkyldithiophosphate is an amount such that the phosphorous content derived from zinc dialkyldithiophosphate might be less than 0.04% by weight based on the total weight of the composition, neither satisfactory wear resistance nor satisfactorily lower coefficient of friction under operating conditions of an oil temperature of medium to low degrees and low-speed rotation can be yielded; if the blended amount of zinc dialkyl¬ dithiophosphate is an amount such that the phosphorous content derived from zinc dialkyldithiophosphate might be above 0.15% by weight based on the total weight of the composition, the effect cannot be improved in proportion to the amount.
The ratio in the number of atoms of boron to nitrogen in succinimide containing boron to be used in the lubricant oil composition of the present invention is 0.05 to 1.5, preferably 0.1 to 0.8. When the ratio in the number of atoms of boron to nitrogen is less than 0.05, the wear properties cannot be satisfactorily improved; or the wear properties might be deteriorated if the ratio in the number of atoms of boron to nitrogen is above 1.5
In the lubricant oil composition in accordance with the present invention, succinimide containing boron should be blended at an amount such that the boron content derived from succinimide containing boron is 0.005 to 0.06% by weight, preferably 0.01 to 0.04% by weight based on the total weight of the composition. If the blended amount of succinimide containing boron is an amount such that the boron content derived from succinimide containing boron is less than 0.005% by weight based on the total weight of the composition, the wear properties cannot be improved satisfactorily; if the blended amount of succinimide containing boron is an amount such that the boron content derived from succinimide containing boron is above 0.06% by weight based on the total weight of the composition, the effect cannot be improved proportionally. In the lubricant oil composition in accordance with the present inven¬ tion, succinimide containing boron may be used singly or in combination of two or more of such species.
Without departing from the objectives of the present invention, various additives conventionally used in lubricant oils may be added to the lubricant oil composi-
tion of the present invention, including for example metallic cleansing agents, other wear adjustors, antioxidants, viscosity improvers, viscosity index improvers, pour point depressants, defoaming agents, other abrasion resistant agents, rust preventing agents, anti-corrosion agents and the like.
The metallic cleansing agents include calcium sulfonate, magnesium sulfonate, barium sulfonate, calcium phenate, barium phenate, calcium salicylate, magnesium salicylate and the like, and these may be used generally in an amount of 0.1 to 5% by weight.
The wear adjustors include for example polyhydric alcohol esters, amines, amides, sulfoesters and the like.
The antioxidants include for example amine antioxidants such as alkylated diphenylamine, phenyl-a-naphthylamine, alkylated a-naphthylamine, phenolic antioxidants such as 2,6-di-t-butyl-4-methyl phenol, and 4,4-methylene bis (2,6-di-t- butyl phenol), and the like. These may be used generally in an amount of 0.05 to 2% by weight.
The improvers of coefficients of viscosity include for example poly- methacrylate, polyisobutylene, ethylene-propylene copolymers, styrene-butadiene hydrogenated copolymers and the like. These may be used generally in an amount of 0.5 to 35% by weight.
The decreasing agents of flowing points include for example poly- alkylmethacrylate, chlorinated paraffin-naphthalene condensate, alkylated polystyrene and the like.
The defoaming agents include for example dimethylpolysiloxane and polyacrylic acid and the like.
The wear resistant agents include for example metal salts of thio- phosphate, metal salts of thiocarbamate, sulfur compounds, phosphate esters, phosphite esters and the like. These may be used generally in an amount of 0.05 to 5.0% by weight.
The rust preventing agents include for example fatty acid, alkenylsuccinic acid semiester, fatty acid soap, alkylsulfonate salts, polyhydric alcohol esters of fatty acid, fatty acid amines, oxidated paraffin, alkylpolyoxyethylene either and the like.
The anti-corrosion agents include for example benzotriazole, benzoimidazole and the like.
Examples
The present invention will now be explained in more details in the follow¬ ing non-limiting examples.
The coefficients of friction of lubricant oil compositions were measured by using a sliding reciprocating friction tester (SRV friction tester) at a 50-Hz frequency, a 3-mm vibration amplitude, a 25-N load, a temperature of 80°C, a testing period of 25 mintues.
Examples 1 to 8 and Comparative Examples 1 to 3
Lubricant oil compositions containing a base oil (100 Neutral Oil at a viscosity of 4.4 rnm/s^ at 100°C), each of the individual blending components of the types and amounts shown in Table 1, and 2.0% weight of calcium sulfonate as a metallic cleansing agent, were prepared, and their coefficients of friction were measured. The results are shown in Table 1.
TABLE 1
COMPARATIVE
EXAMPLE EXAMPLE 1 2 3
Mo Content in Cg-MoDTC (ppm) 400 800 400 400 400 400 400 400 400 400
Mo Content in C 13-M0DTC (ppm) 800
Phosphorous Content in C4/C5 ZnDTP (primary)
0.10
Phosphorous Content in Cg ZnDTP (primary) (\vt%) 0.10 0.10 0.10 0.06 .10 0.10 — 0.10 0.03
Phosphorous Content in C3/C6 ZnDTP (secondary) — — 0.10 — —
Succinimide containing boron (\vt%) 3 5 5 — 5 1
Succinimide (\vt%) 2 ..... 5 — .- I
Boron content (\vt%) 0.016 0.016 0.016 0.016 0.016 0.03 0.01 0.06 0.016 — 0.016
Boron/nitrogen (ratio of the number of atoms) 0.26 0.26 0.26 0.26 0.26 0.44 0.23 1.00 0.26 0 0.26
Coefficient of friction 0.095 0.093 0.098 0.096 0.099 0.096 0.097 0.125 0.161 0.131 0.163
Notes: C8-MoDTC sulfoxy molybdenum-N,N-dioceyl-dithiocarbamate
Cjj-MoDTC sulfoxy molybdenum-N,N-ditridecyl-dithiocarbamate
C4/C5 ZnDTP (primary) zinc n-bueyl-n-pentyl diehiophosphate
C8-ZnDTP (primary) zinc di-2-ethylhexyl dithiophosphate
C3/C6 ZnDTP (secondary) zinc isopropyl-1-ethylbutyl dithiophosphate
All of the lubricant oil compositions of Examples 1 to 8 in accordance with the present invention have lower coefficients of friction and excellent wear properties. By comparison, the lubricant oil composition of Comparative Example 1, blended with zinc dialkyldithiophosphate having a secondary alkyl group, the lubricant oil composition of Comparative Example 2, blended with succinimide instead of succinimide containing boron, and the lubricant oil composition of Comparative Example 3, with phosphorous content of 0.03% by weight derived from zinc dialkyl¬ dithiophosphate having a primary alkyl group, have higher coefficients of friction, so that their wear properties are not satisfactory.
The lubricant oil composition of the present invention can exhibit burffing effects by being strongly adsorbed onto the wear face under operation conditions of oil temperatures of medium to low degrees and low-speed rotation, thereby decreasing the coefficienbt of friction. The lubricant oil composition of the present invention is preferably uised as lubricant oils for automobiles such as a lubricant oil for internal combustion engines, gear oil, automatic transmission fluids, and shock absorber oils.
Claims
1. A lubricating oil composition comprising a lubricant base oil blended with (A) sulfoxymolybdenum dithiocarbamate with a hydrocarbon group having 8 to 18 carbon atoms, (B) a zinc dialkyldithiophosphate consisting of zinc dialkyldithiophosphate containing alkyl groups which are exclusively primary alkyl group having 1. to 18 carbon atoms, and (C) succinimide containing boron, wherein based on the total weight of the composition, the molybdenum content is 200 to 1,000 ppm (ratio by weight) and the phosphorus content derived from zinc dialkyldithio¬ phosphate is 0.04 to 0.15% by weight and the boron content derived from succinimide containing boron is 0.005 to 0.06% by weight.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6131164A JPH07331269A (en) | 1994-05-20 | 1994-05-20 | Lubricating oil composition |
| PCT/US1995/006621 WO1996037584A1 (en) | 1994-05-20 | 1995-05-24 | Lubricating oil composition |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6131164A JPH07331269A (en) | 1994-05-20 | 1994-05-20 | Lubricating oil composition |
| PCT/US1995/006621 WO1996037584A1 (en) | 1994-05-20 | 1995-05-24 | Lubricating oil composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1996037584A1 true WO1996037584A1 (en) | 1996-11-28 |
Family
ID=26466079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1995/006621 WO1996037584A1 (en) | 1994-05-20 | 1995-05-24 | Lubricating oil composition |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO1996037584A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6184185B1 (en) | 1998-05-08 | 2001-02-06 | Tonen Corporation | Lubricant oil composition comprising borated cyclic carboxylic acid imide |
| EP1027412A4 (en) * | 1997-11-12 | 2002-01-02 | Exxonmobil Chem Patents Inc | Wear control with dispersants employing poly alpha-olefin polymers |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3419589A (en) * | 1965-10-01 | 1968-12-31 | American Metal Climax Inc | Organic molybdenum compounds containing sulfur and method of preparation |
| US4098705A (en) * | 1975-08-07 | 1978-07-04 | Asahi Denka Kogyo K.K. | Sulfur containing molybdenum dihydrocarbyldithiocarbamate compound |
| US4846983A (en) * | 1986-02-21 | 1989-07-11 | The Lubrizol Corp. | Novel carbamate additives for functional fluids |
| US5160645A (en) * | 1991-04-30 | 1992-11-03 | Ntn Corporation | Grease composition for constant velocity joint |
| US5207936A (en) * | 1991-04-01 | 1993-05-04 | Ntn Corporation | Grease composition for constant velocity joint |
-
1995
- 1995-05-24 WO PCT/US1995/006621 patent/WO1996037584A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3419589A (en) * | 1965-10-01 | 1968-12-31 | American Metal Climax Inc | Organic molybdenum compounds containing sulfur and method of preparation |
| US4098705A (en) * | 1975-08-07 | 1978-07-04 | Asahi Denka Kogyo K.K. | Sulfur containing molybdenum dihydrocarbyldithiocarbamate compound |
| US4846983A (en) * | 1986-02-21 | 1989-07-11 | The Lubrizol Corp. | Novel carbamate additives for functional fluids |
| US5207936A (en) * | 1991-04-01 | 1993-05-04 | Ntn Corporation | Grease composition for constant velocity joint |
| US5160645A (en) * | 1991-04-30 | 1992-11-03 | Ntn Corporation | Grease composition for constant velocity joint |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1027412A4 (en) * | 1997-11-12 | 2002-01-02 | Exxonmobil Chem Patents Inc | Wear control with dispersants employing poly alpha-olefin polymers |
| US6184185B1 (en) | 1998-05-08 | 2001-02-06 | Tonen Corporation | Lubricant oil composition comprising borated cyclic carboxylic acid imide |
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