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WO2003046039A1 - Resines reticulees en phase aqueuse a base d'ester de resine epoxyde/acrylate et de poly(urethanne-uree) aqueux - Google Patents

Resines reticulees en phase aqueuse a base d'ester de resine epoxyde/acrylate et de poly(urethanne-uree) aqueux Download PDF

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Publication number
WO2003046039A1
WO2003046039A1 PCT/US2001/046120 US0146120W WO03046039A1 WO 2003046039 A1 WO2003046039 A1 WO 2003046039A1 US 0146120 W US0146120 W US 0146120W WO 03046039 A1 WO03046039 A1 WO 03046039A1
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WO
WIPO (PCT)
Prior art keywords
resin system
acid
group
poly
ester
Prior art date
Application number
PCT/US2001/046120
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English (en)
Inventor
Ralph Arcurio
Richard Czarnecki
Sam Lucci
Jeannette Simoni-Truncellito
Original Assignee
Sun Chemical Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sun Chemical Corporation filed Critical Sun Chemical Corporation
Priority to CA002468128A priority Critical patent/CA2468128A1/fr
Priority to PCT/US2001/046120 priority patent/WO2003046039A1/fr
Priority to EP01988250A priority patent/EP1448649A1/fr
Publication of WO2003046039A1 publication Critical patent/WO2003046039A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/0804—Manufacture of polymers containing ionic or ionogenic groups
    • C08G18/0819—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups
    • C08G18/0823—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups containing carboxylate salt groups or groups forming them
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds

Definitions

  • This invention relates to water-borne crosslinkable resin compositions. More particularly, this invention relates to water-borne crosslinkable printing ink compositions for printing on low density polyethylene films.
  • Flexography is a branch of rotary typographic printing in which the printing is applied to a substrate surface by use of a flexible relief plate and highly fluid, volatile solvent based inks which dry rapidly by evaporation.
  • increased emphasis has been placed on using water as the solvent, rather than volatile organic solvents; and a wide variety of colorants have been developed for use in these water-based ink formulations.
  • Recent advances in water-based ink formulations are illustrated, by Levy et al., in U.S. Patent 5,853,859 and by Hutter in U.S. Patent 5,498,661.
  • Levy et al. disclose printing compositions for printing fabric comprising thermoplastic polyolefin fibers.
  • Levy's printing compositions comprise a room temperature curable latex polymer, pigment and a cure promoter.
  • the composition is applied to fabric as an aqueous mixture with a pre-cure pH adjusted to above 8 using a fugitive alkali.
  • the composition is then cured at room temperature.
  • the dried residue of the aqueous mixture retains color-fastness when exposed to liquids with a pH between about 2 and about 13 so that the dried residue will remain on the fabric when exposed to most common cleaning chemicals and under most conditions of use.
  • Hutter discloses acrylic latex binders for use in preparing zinc-containing water- base inks for printing on plastic films such as polypropylene, polyester, and the like.
  • the binder results from an addition emulsion polymerization reaction of four individual components.
  • Inks containing these binders exhibit increased chemical resistance to commonly-used cleaning formulations and offer excellent heat and water-crinkle resistance.
  • aqueous printing inks which are derived from an aqueous crosslinkable resin system having a pH greater than 7 comprising:
  • the epoxy/ester prepolymer is prepared from a condensation polymer of an aryl, alkyl or alkaryl dihydroxy compound with a aryl, alkyl or alkaryl bis-oxirane compound, and an unsaturated fatty acid and,
  • a further embodiment of this invention is a method for producing a cured film on a substrate comprising the steps of: applying the above described aqueous crosslinkable resin system onto a surface of the substrate to form a coating and drying the coating to initiate curing; wherein the film formed is tack-free, firmly adherent to the surface of the substrate, and un-blocked when contacted under pressure to a second surface of the substrate or a second substrate.
  • the film is further crosslinked by oxidative crosslinking of the residual ethylenic unsaturation.
  • a still further embodiment of this invention is an aqueous, crosslinkable printing ink having a pH greater than 7 comprising:
  • A a water-dispersible poly(urethane/urea) being the reaction product of a polyurethane prepolymer prepared from a diisocyanate component and a diol component; wherein the - NCO/-OH ratio is between 1 and 2; and containing 1 to 8 % by weight of unreacted -NCO and carboxylic acid group; and between 110 % and 200 % of a diamine, based on the equivalents of the unreacted -NCO groups; wherein the resulting poly(urethane/urea) contains terminal amino groups and - CO 2 ' A + groups; wherein A + is an onium ion of ammonia or a volatile amine; (B) a water-dispersible poly(epoxy/ester/acrylate) being an epoxy/ester prepolymer grafted with an acrylic component; wherein (a) the epoxy/ester prepolymer is prepared from a condensation polymer of an aryl, alkyl or alkaryl dihydroxy compound
  • a still further embodiment of this invention is a method for printing an image on a substrate comprising the steps: applying the aqueous, crosslinkable printing ink of this invention onto the surface of the substrate to form an image; and drying the image to initiate curing; wherein the print image formed is tack-free, firmly adherent to the surface of the substrate, and un-blocked when contacted under pressure to a second surface of the substrate or to a second substrate.
  • the present invention relates to a novel water based dual crosslinking resin system between a water borne epoxy/ester/acrylate copolymer component containing reactive keto groups and ethylenic unsaturation, and a water-borne poly(urethane/urea) component containing terminal amino groups. Both components contain ammonium carboxylate salt groups derived from carboxylic acid groups and ammonia or a fugitive amine so that the water based crosslinking system can be neutral or basic. More particularly, the present invention relates to a novel water based flexographic packaging ink which exploits this dual crosslinking resin system.
  • the poly(urethane/urea) component provides the required amine functionality for the predominant crosslinking to take place in the dried ink with reactive keto groups on the epoxy-ester/acrylate copolymer component. Additionally the amine functionality of the poly(urethane/urea) provides adhesion to an underlying substrate. The ethylenic unsaturation of the epoxy-ester/acrylate copolymer additionally allows the copolymer to undergo secondary oxidative crosslinking when used with metal drying compounds.
  • This ink system exhibits excellent block resistance, printability, resolubility, and adhesion on low density polyethylene film products such as those used to manufacture diapers and other such personal care products.
  • the aqueous crosslinkable resin system of this invention comprises a water-borne poly(urethane/urea) hereinafter described; a water-borne poly(epoxy/ester/acrylate) hereinafter described; and water in which the resin system has a pH of 7 or greater.
  • water borne and water-dilutable are intended to mean a material that is either a water dispersion or a water solution of the material or that the material is capable of being dissolved or dispersed in water as a stable suspension or solution.
  • these aqueous crosslinkable resin systems comprise about 25 to about 30 wt.% of the water-borne poly(urethane/urea); about 15 to about 20 wt.% of the water-borne poly(epoxy/ester/acrylate); and about 10 to about 15 wt.% of water, based on the total weight of the resin system.
  • the aqueous crosslinkable resin system may further comprise an oxidative crosslinking agent; a colorant; a fluorescent agent ; or any mixture thereof.
  • the system may additionally contain conventional adjuvants such as dispersing agents, matting agents, waxes, silicones, and the like.
  • the water-dispersible poly(urethane/urea) component of this invention contains terminal amino groups, and ammonium carboxylate salt groups derived from carboxylic acid groups and ammonia or a fugitive amine, i.e., -CO 2 " A + groups, wherein A + is an onium ion of ammonia or the fugitive (i.e., volatile) amine.
  • This poly(urethane/urea) component comprises a reaction product of a polyurethane prepolymer and a diamine, such as hydrazine.
  • the polyurethane prepolymer is a polyurethane polymer having two terminal isocyanate groups and has the Structure I:
  • R 2 comprises R 3 and R 4 , wherein R 3 is a polymeric group, and wherein R 4 is an alkyl group containing the carboxylic acid group or the -CO 2 " A + group and wherein the polyurethane prepolymer contains 1 to 8.0 wt.% of unreacted -NCO groups.
  • R 2 comprises from about 30 to about 80 equivalent % of R 3 and preferably further comprises R 5 which is an alkyl group; with the molar ratio of R 3 to R 4 being in the range from 70:30 to 95:5.
  • the ratio of R 3 to R 4 is about 85:15.
  • the polyurethane prepolymer used in this invention may additionally contain up to about 10 wt. % of a second polyurethane polymer having a single terminal isocyanate group having the Structure II:
  • the polyurethane prepolymer used in this invention contains from about 90 wt.% to about 98 wt.% of the polyurethane polymer of Structure I; and from about 10 wt.% to about 2 wt.% of the second polyurethane polymer of Structure II.
  • the polyurethane prepolymer is prepared from a diisocyanate component and a diol component so that the -NCO/-OH ratio is between 1 and 2 and, preferably, is about 1.5.
  • the "-NCO/-OH ratio" as used herein, has its conventional meaning which is the ratio of the number of equivalents of -NCO groups in the diisocyanate component, to the number of equivalents of -OH groups in the diol component.
  • the resulting polyurethane prepolymer contains 1 to 8 wt. % by weight of unreacted -NCO groups, and 1 to 25 wt. % carboxylic acid groups.
  • the polyurethane prepolymer contains about 5 wt.
  • the polyurethane prepolymer is prepared from a diisocyanate component comprising an aryldiisocyanate or an alkyldiisocyanate; a diol component comprising a polymeric diol, a diol-alkanoic acid; and optionally, an alkane diol, an alkoxylated amine, or a mixture thereof.
  • aryldiisocyanates or alkyldiisocyanates may be used such as 4,4'-diphenylmethane diisocyanate; 4,4'- dicyclohexyl diisocyanate; hexamethylene diisocyanate; isophorone diisocyanate; toluene diisocyanate, or meta-tetramethylene- xylenediisocyanate; of which meta-tetramethylene- xylenediisocyanate is preferred.
  • the polymeric diol used in this preparation has a molecular weight (MW) from about 650 to about 4000 and is selected from the group consisting of a polyether diol, a polyethylene diol, a polycaprolactone diol and a polypropylene diol.
  • MW molecular weight
  • a number of polyether diols may be used such as PEG 650, PEG 1000, PEG 2000, PEG 3000, PEG 4000, or alpha-hydro-omega-hydroxy-poly(oxy-1 ,4-butyldiyl).
  • a particularly preferred polyether diol is alpha-hydro-omega-hydroxy-poly(oxy-1 ,4-butyldiyl) having a MW of about 1000.
  • alkanoic acids such as dimethylolpropionic acid, dimethylolbutanoic acid, and the like.
  • a particularly preferred alkanoic acid is dimethylolpropionic acid or dimethylolbutanoic acid.
  • alkane diols may be used such as 1 ,4-butanediol,
  • alkanediol 2- methyl-1 ,3-propanediol.
  • alkoxylated amines may be used.
  • the alkoxylated amine is an ethoxylated amine, a propoxylated amine or a combination thereof, such as methoxy-poly(oxyethylene/oxypropylene)-2-propylamine.
  • a particularly preferred alkoxylated amine is methoxy-poly(oxyethylene/oxypropylene)-2- propylamine.
  • the polyurethane prepolymer is prepared from about 10 to about 70 parts by weight of the polymeric diol; about 10 to about 70 parts by weight of the aryldiisocyanate or the alkyldiisocyanate; about 1 to about 30 parts by weight of the diol- alkanoic acid; 0 to about 30 parts by weight of the alkane diol; and 0 to about 25 parts by weight of the alkoxylated amine.
  • the reaction mixture for preparing the prepolymer may also contain 0 to about 2 parts by weight of a polymerization catalyst (e.g., a tin or zinc based catalyst), and 0 to about 25 parts by weight of an organic co-solvent such as ethyl acetate.
  • the co-solvent may also function as the processing solvent used in the preparation of the aqueous crosslinkable polymeric resin.
  • the polyurethane prepolymer is reacted with between 110 % and 200 % of the diamine, based on the equivalents of the unreacted -NCO groups in the prepolymer; then neutralized with ammonia or a fugitive or volatile amine.
  • a "fugitive amine” includes volatile amines which readily evaporate at room temperatures.
  • the volatile amines will contain 1 to 5 carbon atoms and include alkyl amines or an alkanolamines such as t-butyl amine, triethyl amine, ethanolamine, methyl ethanolamine, N,N-dimethylethanol-amine.
  • a preferred alkanolamine is N,N-dimethylethanol-amine.
  • a number of diamines may be used for preparing the poly(urethane/urea) of this invention, such as hydrazine, alkyl substituted hydrazines, methylenediamine, ethylenediamine, diamino cyclohexane, hexamethylene diamine, piperazine, or isophorone diamine.
  • a particularly preferred diamine is hydrazine.
  • the poly(urethane/urea) component is prepared by first preparing the polyurethane prepolymer in a processing (co-solvent) as described above. The resulting prepolymer is slowly added to an aqueous solution of the diamine and the ammonia or fugitive amine at raised temperatures to produce a water- dispersible poly(urethane/urea).
  • the water-dispersible poly(urethane/urea) prepared by this method is an aqueous dispersion comprising about 15 to about 70 wt. % of the poly(urethane/urea); about 30 to about 85 wt. % water; and 0 to about 25 wt. % of a processing solvent such as 1-propoxy-2-propanol.
  • the poly(urethane/urea) prepared by this method has the Structure III:
  • Ri is a covalent bond or a C ⁇ -3 alkyl group and -U- has the Structure IV:
  • -Q- is an aryl or alkyl group
  • R 2 comprises R 3 and R , wherein R 3 is an alkyl or a polymeric group, and wherein R 4 is an alkyl group containing the -CO 2 " A + group.
  • the poly(urethane/urea) is prepared from the polyurethane prepolymer containing both the polyurethane polymer of Structure I and the second polyurethane of Structure II, the poly(urethane/urea) additionally contains a second poly(urethane/urea) polymer of Structure V:
  • R ⁇ is a covalent bond or an alkyl group having 1-3 carbon atoms; -U- has the Structure IV:
  • -Q- is an aryl or alkyl group
  • R 2 comprises R 3 and R 4 , wherein R 3 is an alkyl or a polymeric group, wherein R is an alkyl group containing the -CO 2 " A + group; and wherein J is a methoxypoly(oxyethylene/oxypropylene)-2-2propyl group.
  • a preferred water-dispersible poly(urethane/urea) of this invention is propanoic acid,3-hydroxy-2- (hydroxymethyl)-2-methyl, polymer with 1 ,3-bis(1 -isocyanato-1 -methylethyl)benzene, hydrazine, alpha-hydro-omegahydroxypoly-9oxy-1 ,4-butanediyl) and 2-methyl-1 ,3- propanediol, ammonium salt, polyethylene-polypropyleneglycol 2-aminopropyl methyl ethyl (ME) ether blocked.
  • the water-borne poly(epoxy/ester/acrylate) component of this invention contains, reactive keto groups, residual ethylenic unsaturation, and ammonium carboxylate salt groups derived from carboxylic acid groups and ammonia or a volatile amine.
  • the water-borne poly(epoxy/ester/acrylate) component comprises a polymerization product of an epoxy/ester prepolymer grafted with an acrylic component in a processing solvent.
  • the water-dispersible poly(epoxy/ester/acrylate) has the structure: EE ACo wherein EE is an epoxy/ester prepolymer of the structure:
  • AC 0 is the acrylic component comprising one or more acrylic polymer moieties randomly bonded to the epoxy/ester prepolymer, wherein each acrylic polymer moiety has the structure:
  • each R ⁇ 2 individually is selected from hydrogen or an alkyl group;
  • R ⁇ 3 is a chain termination group;
  • R ⁇ is an alkyl group; and
  • R 15 is an ester group which contains a keto group, or an amide group which contains a keto group; and wherein o, p, q, r, s, and t each individually are positive integers, while u is zero or a positive integer.
  • Each acrylic polymer moiety has a random copolymer structure and the integers s, t, and u simply designate the number of moieties in the acrylic component.
  • R 15 is a diacetoneamide group;
  • u is a positive integer;
  • R- ⁇ 4 is a butyl group
  • the epoxy/ester prepolymer is a condensation polymer of a bis-phenol-A with an aromatic bis-oxirane, and an unsaturated fatty acid.
  • the epoxy/ester prepolymer is prepared from a reaction mixture comprising: about 5 to about 80 parts by weight of a condensation polymer of bis-phenol-A with an aromatic bis-oxirane; about 5 to about 70 parts by weight of the unsaturated fatty acid; 0 to about 1 part by weight of a polymerization catalyst; and about 10 to about 80 parts by weight of the processing solvent.
  • Bis-phenol A compounds useful in preparing the condensation polymer include, bis-phenol A (i.e., 2,2-(4-hydroxyphenyl)propane).
  • Aromatic bis-oxirane compounds useful in preparing the condensation polymer include 2,2'- ⁇ (1-methylethylidine)bis(4,1-phenylene- oxymethylene) ⁇ bis(oxirane).
  • the condensation polymer is derived from bis- phenol A polymerized with 2,2'- ⁇ (1-methylethylidine)bis(4,1-phenylene- oxymethylene) ⁇ bis(oxirane).
  • Unsaturated fatty acids which are useful in preparing the epoxy/ester prepolymer may be selected from the group consisting of linoleic; linolenic; and oleic acid; and mixtures thereof.
  • a preferred unsaturated fatty acid is a fatty acid mixture containing 39 wt.
  • % linoleic acid 40 wt. % of linolenic acid; and 21 wt. % of oleic acid; and a particularly preferred unsaturated fatty acid is this fatty acid mixture which contains additional linoleic acid.
  • the acrylic component which is grafted to the epoxy/ester prepolymer contains reactive keto groups and -CO 2 " B + groups, in which B + is an onium ion of ammonia or the volatile amine.
  • B + is an onium ion of ammonia or the volatile amine and may be the same as A + described previously in connection with the poly(urethane/urea) component.
  • the acrylic component comprises: about 1 to about 30 parts by weight of diacetone acrylamide; about 1 to about 20 parts by weight of acrylic acid, methacrylic acid or a mixture thereof; about 0 to about 30 parts by weight of an alkyl acrylate; about 0.1 to about 5 parts by weight of a polymerization initiator; and about 1 to about 50 parts by weight of the processing solvent such as 1-propoxy-2-propanol.
  • the alkyl acrylate may be a C 1-5 alkyl acrylate with butyl acrylate being preferred.
  • the grafted polymerization product is neutralized with ammonia or the volatile amine.
  • a volatile amine When used, it typically contains 1 to 5 carbon atoms, and is an alkyl amine or an alkanolamine such as t-butyl amine, triethyl amine, ethanolamine, methylethanolamine, N,N-dimethylethanol- amine, and the like.
  • a preferred alkanolamine is N,N-dimethylethanol-amine.
  • the epoxy resin is first esterified with an unsaturated fatty acid in the presence of a metal catalyst, such as zirconium 2- ethylhexoate.
  • a metal catalyst such as zirconium 2- ethylhexoate.
  • the resulting epoxy/ester is grafted with the acrylic component in the presence of an initiator compound such as azoisobutyronitrile.
  • the water-dispersible poly(epoxy/ester/acrylate) prepared in this invention is an aqueous solution comprising about 10 to about 85 wt.% of the poly(epoxy/ester/acrylate); about 15 to about 90 wt. % water; and 0 to about 40 wt. % of a processing solvent.
  • a preferred water-dispersible poly(epoxy/ester/acrylate) of this invention is phenol 4,4'-(1-methylethylidene)bis, polymer with (chloromethyl) oxirane, reaction products with C ⁇ unsaturated fatty acids, copolymers with butyl 2-propenoate, 2-methyl-2-propenoic acid and N-(1 ,1-dimethyl-3- oxobutyl)acrylamide, compound with N,N-dimethylethanolamine.
  • the aqueous crosslinkable resin system of this invention may contain an oxidative crosslinking agent to facilitate the oxidative crosslinking of the residual ethylenic unsaturation of the dried resin system.
  • an oxidative crosslinking agent to facilitate the oxidative crosslinking of the residual ethylenic unsaturation of the dried resin system.
  • Such oxidative crosslinking agents are particularly useful for the dual curing inks using the crosslinkable resin system of this invention. While most of such agents are useful, preferred oxidative crosslinking agents include metal salts of a fatty acids wherein the metal is manganese, cobalt, or zinc. A few examples of such metal salts are more fully described in connection with the preparation of printing inks under this invention.
  • the aqueous crosslinkable resin system of this invention may contain a colorant such as a dye or pigment, a fluorescing agent, or a mixture thereof.
  • the colorant may possess the dual function of a fluorescing coloring agent.
  • Colorants have their conventional function of imparting a visible color with a desired hue and density.
  • Fluorescing agents have the function of imparting a marking typically not visible without the aid of stimulating radiation outside the visible spectral region.
  • colorants and fluorescing agents may or may not be incorporated into any crosslinkable resin system of this invention, when used they form a component of the dual crosslinkable printing ink of this invention.
  • the resin systems of this invention when used in aqueous crosslinkable printing inks typically contain one or more colorants such as a soluble dye or solid pigment.
  • Such inks may typically contain one or more conventional solid pigments dispersed therein.
  • the pigment used may be any conventional organic or inorganic pigment such as Pigment Yellow 1 , Pigment Yellow 3, Pigment Yellow 12, Pigment Yellow 13, Pigment
  • Pigment Yellow 14 Pigment Yellow 17, Pigment Yellow 63, Pigment Yellow 65, Pigment Yellow 73, Pigment Yellow 74, Pigment Yellow 75, Pigment Yellow 83, Pigment Yellow 97, Pigment Yellow 98, Pigment Yellow 106, Pigment Yellow 114, Pigment Yellow 121 , Pigment Yellow 126, Pigment Yellow 127, Pigment Yellow 136, Pigment Yellow 174, Pigment Yellow 176, Pigment Yellow 188, Pigment Orange 5, Pigment Orange 13, Pigment Orange 16,
  • Pigment Orange 34 Pigment Red 2, Pigment Red 9, Pigment Red 14, Pigment Red 17, Pigment Red 22, Pigment Red 23, Pigment Red 37, Pigment Red 38, Pigment Red 41 , Pigment Red 42, Pigment Red 112, Pigment Red 170, Pigment Red 210, Pigment Red 238, Pigment Blue 15, Pigment Blue 15:1 , Pigment Blue 15:2, Pigment Blue 15:3, Pigment Blue 15:4, Pigment Green 7, Pigment Green 36, Pigment Violet 23, Pigment Black 7, titanium dioxide, carbon black, and the like.
  • Pigment compositions which are also useful in the printing inks of this invention are described in U.S. Patents 4,946,508; 4,946,509; 5,024,894; and 5,062,894 each of which is incorporated herein by reference. Such pigment compositions are a blend of the pigment along with a poly(alkylene oxide) grafted pigment.
  • the classes of dyes suitable for use in present invention are selected from acid dyes, natural dyes, direct dyes either cationic or anionic direct dyes, basic dyes, and reactive dyes.
  • the acid dyes also regarded as anionic dyes, are soluble in water and mainly insoluble in organic solvents and are selected, from yellow acid dyes, orange acid dyes, red acid dyes, violet acid dyes, blue acid dyes, green acid dyes, and black acid dyes.
  • European Patent 0 745 651 describes a number of acid dyes which are suitable for use in the present invention.
  • the yellow acid dyes selected include Acid Yellow 1 (C.I. 10316); Acid Yellow 7 (C.I. 56205); Acid Yellow 17 (C.I.
  • Acid Yellow 42 (C.I. 22910); Acid Yellow 73 (C.I. 45350); Acid Yellow 99 (C.I.
  • the orange acid dyes selected include Acid Orange 1 (C.I. 13090/1 ); Acid Orange 10 (C.I. 16230); Acid Orange 20 (CI. 14603); Acid Orange 76 (CI. 18870); Acid Orange 142; Food Orange 2 (C.I. 15980); and
  • the red acid dyes selected include Acid Red 1 (C.I. 18050); Acid Red 4 (C.I.
  • BASOVIT TM 425E (available from BASF Corporation) a xanthone based acid dye also known as Acid Red 51 (C.I. 45430); Acid Red 52 (C.I. 45100); Acid Red 73 (CI. 27290); Acid Red 87 (C.I. 45380); Acid Red 94 (C.I. 45440); Acid Red 194; and Food Red 1 (C.I.
  • the violet acid dyes selected include Acid Violet 7 (C.I. 18055); and Acid Violet
  • the blue acid dyes selected include Acid Blue 1 (C.I. 42045); Acid Blue 9
  • the green acid dyes selected include Acid Green 1 (C.I. 10028); Acid Green 3 (C.I. 42085); Acid Green 5 (C.I. 42095); Acid Green 26
  • the black acid dyes selected include Acid
  • the direct dyes selected for use in the present invention include Direct Blue 86 (C.I. 74180), Direct Red 199, Direct Red 168, Direct Red 253 (C.I. Not Assigned) and Direct
  • Yellow 107/132 (C.I. Not Assigned).
  • the direct dyes are commonly used in coloration of pulp paper.
  • the natural dyes selected for use in the present invention include Alkanet (C.I.
  • Acid dyes such as, for example, Acid Black 194; Acid Red 51 , Acid Blue 9; Acid Green 26; Acid Yellow 36, Acid Orange 142, Direct Blue 86, Direct Red 253 and Direct Yellow 107/132 dyes.
  • the printing inks of this invention may also contain one or more fluorescing agents either alone or in combination with other coloring agents as described above.
  • a preferred fluorescing agent is ClircodeTM a trademark product which is owned by and available from Isotag Inc. of Houston, TX.
  • the aqueous crosslinkable resin systems and inks of this invention may contain the usual adjuvants to adjust flow, surface tension and gloss of a cured coating or printed ink.
  • adjuvants contained in inks or coatings typically are a surface active agent, a wax, or a combination thereof. These adjuvants may function as leveling agents, wetting agents, dispersants, defrothers or deareators, or additional adjuvants may be added to provide a specific function.
  • Preferred adjuvants include fluorocarbon surfactants such as FC-430,a product of the 3M company; silicones, such as DC57, a product of Dow Chemical Corporation; polyethylene wax; polyamide wax; polytetrafluoroethylene wax; and the like.
  • the aqueous crosslinkable ink of this invention comprises the aqueous crosslinkable resin system of this invention; water; and a colorant, and optionally an oxidative crosslinking agent.
  • the aqueous crosslinkable ink has a pH of 7 or greater.
  • the aqueous crosslinkable resin system comprises the water- dispersible poly(urethane/urea); and the water-dispersible poly(epoxy/ester/acrylate).
  • the aqueous crosslinkable ink of this invention may further comprise adjuvants which function as leveling agents, wetting agents, dispersants, defrothers, deareators, etc.
  • the ink is prepared from a varnish comprising the aqueous crosslinkable resin system of this invention; the oxidative crosslinking agent; a non-ionic surfactant; a wax adjuvant such as oxidized polyethylene wax, paraffin wax, and the like; a defrother such as dimethyl polysiloxane, and the like; and water.
  • the varnish is then compounded with the colorant, typically a pigment, and any further adjuvants and water to produce a stable ink having a pH of at least 7 and preferably 8 or above.
  • the aqueous crosslinkable ink of this invention comprises: about 40 wt.% to about 50 wt.% by weight of the aqueous crosslinkable resin system of this invention; about 5 wt.% to about 15 wt.% of water; about 30 wt.% to about 50 wt.% of the colorant, a fluorescing agent, or a mixture thereof; about 0.5 wt.% to about 5 wt.% of the oxidative crosslinking agent; about 1 wt.% to about 5 wt.% of the non-ionic surfactant; about 1 wt.% to about 7 wt.% of the wax adjuvant; and, about 0.1 wt.% to about 2 wt.% of the defrother.
  • the inks of this invention are particularly useful in flexographic printing on low density polyethylene film such as used in the manufacture of diapers and other such personal care products.
  • the aqueous crosslinkable resin composition may be applied to the substrate surface as a uniform coating using any conventional coating technique.
  • the composition may be spin coated, bar coated, roller coated, curtain coated or may be applied by brushing, spraying, etc.
  • the aqueous composition may be applied imagewise to the substrate surface, for instance as a printing ink of this invention, using any conventional printing technique.
  • the resulting coating or printed image is dried thus removing residual water, ammonia or volatile amine, and any residual processing solvent from the coating or ink image to initiate curing.
  • residual water, ammonia/volatile amines, and any solvent is removed as the coated substrate passes through the drying sections of conventional coaters or printing press systems.
  • the system pH is reduced to initiate crosslinking between the reactive keto groups of the epoxy/ester/acrylate component with the terminal amino functionality of the poly(urethane/urea) component to form a cured film or ink image.
  • the cured film or ink image is further cured by oxidative crosslinking of the residual ethylenic groups of the epoxy/ester/acrylate component over an extended period of time thus further hardening and adhering the cured film or ink image to the substrate.
  • a cured film or ink image is formed which is tack-free and firmly adherent to the surface of the substrate, and which is un-blocked when contacted under pressure to a second surface of a second substrate or another portion of the cured film or ink image.
  • cured film is intended to include a continuous cured film composition as well as a discontinuous cured ink image composition.
  • an image is printed on a substrate comprising the steps: printing the aqueous crosslinkable ink of this invention (previously described) onto a surface of the substrate to form an image; and drying the image to initiate curing so that the image formed which is tack-free, firmly adherent to the surface of the substrate, and un-blocked when contacted under pressure to a second surface of the substrate or a second substrate.
  • the crosslinked ink image is further crosslinked by oxidative crosslinking of the residual ethylenic unsaturation.
  • the substrate and its surface may be composed of any typical substrate material such as plastics, for example polyolefin, polystyrene, polyvinylchloride, polynaphthelene terephthalate, polyacrylate, polyacrylic, metals, composites, glass, paper, etc.; however, a polymeric substrate is preferred.
  • the substrate is a sheet material selected from a polyolefin, metalized polyethylene terephthalate, polystrene, polycarbonate, polyurethane, polyesters, polyamide, polyamide, a paper product or a metal.
  • Preferred polymeric substrates include a sheet of polyethylene, polypropylene, polyethylene terephthalate, cellulose acetate, cellulose acetate butyrate, or polycarbonate. Low-density polyethylene such as used in the manufacture of diapers and other such personal care products, is particularly preferred.
  • Example 1 An aqueous, epoxy/ester/acrylate having reactive keto groups was prepared from the components listed in Table 1 using the procedures described herein below. Table 1
  • DER-661 Epoxy Resin is phenol,4,4'-(1-methylethyl ⁇ dene)b ⁇ s-, polymer with 2,2'- ⁇ (1-methylethyl ⁇ d ⁇ ne)b ⁇ s(4,1- phenylene-oxymethylene) ⁇ b ⁇ s(ox ⁇ rane), a product of Dow Chemical
  • Pamolyn 200 is 9,12-octadecaned ⁇ eno ⁇ c acid (Z,Z) (CAS # 60-33-3), a product of Herculese
  • Pamolyn 300 is a fatty acid mixture containing 39 %by weight linoleic acid, 40 % by weight of linolenic acid, and 21 % by weight of oleic acid, a product of Herculese
  • Zirconium Catalyst is zirconium 2-ethylhexoate (12% in mineral spirits), a product of OMG Amencas
  • Arcosolve PNP Solvent is 1-propoxy-2-propanol, a product of Arco corp
  • AIBN (Vazo 64) is azoisobutyronit ⁇ le , a product of the DuPont Company
  • the DER-661 , Pamolyn 200, Pamolyn 300 and Zirconium Catalyst Components were charged into a reactor, a nitrogen blanket was applied and the batch slowly heated to 150 C 2 C and held at that temperature for 0.5 hours.
  • the temperature was increased to 200 C 2 C and held at that temperature for 1 hour, then increased to 234 C 2 C and held at that temperature for 5 hours.
  • the acid number of the reaction mixture was then checked and subsequently checked hourly until it was equal to or less than 5, at which point the batch was cooled to 125 C 2 C.
  • the amount of solids formed during polymerization was determined hourly, and when the amount reached a constant value, the batch was cooled to 80 C 2 C
  • the following three charges of AIBN were added sequentially. 0.13 wt.% of AIBN was added and polymerization continued for 1 hour at which point the amount of solids was checked. 0.13 wt. % of AIBN was then added and polymerization continued for 1 hour at which point the amount of solids was checked. 0.06 wt. % of AIBN was then added and polymerization continued for 1 hour at which point the amount of solids was checked. When the solids value obtained remained constant, the batch was cooled to 60 C 2 C.
  • N,N- Dimethylethanolamine 3.20 wt.% and 8.37 wt.% D.I. Water were premixed and the mixture was added to the batch over a period of 15 minutes 5 minutes. Then 25.68 wt.% D.I. water was added to the batch over a period of 15 minutes 5 minutes and the final product was stirred for 30 minutes before the reactor was cooled to 40 C 5 C. A portion of dimethylethanolamine was then added to the batch to adjust the pH to 9.0 to 9.5; and a portion of D.I. water was added to adjust the viscosity to 2500 to 3500 cps.
  • the resulting aqueous epoxy/ester/acrylate product was then discharged through a 150 micron cloth filter to provide a epoxy-ester-acrylate resin solution containing about 30-35 % by weight of the unsaturated fatty ester of the epoxy resin grafted with a terpolymer of methacrylic acid, butyl acrylate, and diacetoneacrylamide.
  • Example 2
  • DMPA Dimethylolpropionic acid
  • polyTHF 1000 is alpha-hydro-omega-hydroxy-poly(oxy-1,4-butyldiyl) having a MW of about 1000; a product of BASF,
  • MPDiol is 2-methyl-1,3-propanediol; a product of Arco.
  • the reaction was continued for about 2 to 3 hours until the % of free NCO was 4.9 -5.2% at which point the reaction was cooled to 65 - 70 C.
  • the resulting pre-polymer was then sampled for its % of free NCO and % non-volatiles while being held at 65 - 70 C.
  • (k) Scav Ox Lo hydrazine is a 15.5% water solution of the diamine hydrazine; a product of Olin corp.
  • This poly(urethane-urea) was believed to be propanoic acid, 3-hydroxy-2- (hydroxymethyl)-2-methyl-, polymer with 1 ,3-bis(1-isocyanato-1-methylethyl)benzene, hydrazine, -hydro- -hydroxypoly (oxy-1 ,4-butanediyl) and 2-methyl-1 ,3-propanediol, ammonium salt, polyethylene-polypropylene glycol 2-aminopropyl methyl ether blocked.
  • Example 3 An aqueous crosslinkable resin varnish was prepared from the epoxy/ester/acrylate resin of Example 1 and the poly(urethane/urea) of Example 2 having the following formulation:
  • Surfactant is Rhodomax LO surfactant (from Rhodia Corp.) a 30% aqueous solution of mixed non-ionic and cationic surfactants (CAS# 70592-80-2)
  • CAS# 70592-80-2 mixed non-ionic and cationic surfactants
  • Paraffin wax emulsion contains 30% by weight of paraffin wax emulsified in water
  • Metal carboxylic salts is a mixture of carboxylic salts of cobalt and manganese.
  • the components were mixed to produce a stable aqueous varnish dispersion having a viscosity of about 25 seconds using a #3 Zahn Cup.
  • Example 4 An aqueous crosslinkable printing ink was prepared from the varnish formulation of Example 3 having the following formula:
  • the components were mixed to produce a stable aqueous varnish dispersion having a viscosity of about 25 seconds using a #3 Zahn Cup.
  • the printing ink of Example 4 was used in a Common Impression Flexographic printing press to print on sheets of low- density polyethylene. When dried the printed ink firmly adhered to the polyethylene without any evidence of blocking, i.e., Sticking of ink to non-printed film or two separate ink surfaces sticking together to form a single surface.
  • the antiblocking character of the ink and its firm adhesion to the polyethylene was further improved by oxidative exposure to air for 24 hours or more.

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  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
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Abstract

Cette invention a trait à une résine réticulée double à base d'eau ainsi qu'à des encres pour impression qui en sont dérivées. Cette résine contient, (a), un copolymère en phase aqueuse de résine époxyde/ester/acrylate ayant des groupes céto réactifs et une insaturation éthylénique et, (b), un poly(uréthanne/urée) possédant des groupes à terminal amino. La réticulation se fait entre les groupes céto réactifs et les groupes à terminal amino. Cette résine contient également des groupes sel onium carboxylate dérivés de groupes acide carboxylique, ammoniac ou amine volatil, de sorte que le système de réticulation n'est ni neutre ni basique.
PCT/US2001/046120 2001-11-28 2001-11-28 Resines reticulees en phase aqueuse a base d'ester de resine epoxyde/acrylate et de poly(urethanne-uree) aqueux WO2003046039A1 (fr)

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CA002468128A CA2468128A1 (fr) 2001-11-28 2001-11-28 Resines reticulees en phase aqueuse a base d'ester de resine epoxyde/acrylate et de poly(urethanne-uree) aqueux
PCT/US2001/046120 WO2003046039A1 (fr) 2001-11-28 2001-11-28 Resines reticulees en phase aqueuse a base d'ester de resine epoxyde/acrylate et de poly(urethanne-uree) aqueux
EP01988250A EP1448649A1 (fr) 2001-11-28 2001-11-28 Resines reticulees en phase aqueuse a base d'ester de resine epoxyde/acrylate et de poly(urethanne-uree) aqueux

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EP2079809A1 (fr) * 2006-11-10 2009-07-22 Sun Chemical Corporation Encres d'imprimerie à base d'eau pour substrats non tissés
EP3097158A4 (fr) * 2014-01-24 2017-09-20 Sun Chemical Corporation Revêtements aqueux
US9840642B2 (en) 2014-11-18 2017-12-12 Cascades Sonoco Inc. Wet coating compositions for paper substrates, paper substrates coated with the same and process for coating a paper substrate with the same
US20190099978A1 (en) * 2017-09-29 2019-04-04 Nike, Inc. Structurally-colored articles and methods for making and using structurally-colored articles
US11129444B1 (en) 2020-08-07 2021-09-28 Nike, Inc. Footwear article having repurposed material with concealing layer
US11241062B1 (en) 2020-08-07 2022-02-08 Nike, Inc. Footwear article having repurposed material with structural-color concealing layer
US11597996B2 (en) 2019-06-26 2023-03-07 Nike, Inc. Structurally-colored articles and methods for making and using structurally-colored articles
US11612208B2 (en) 2019-07-26 2023-03-28 Nike, Inc. Structurally-colored articles and methods for making and using structurally-colored articles
US11986042B2 (en) 2019-10-21 2024-05-21 Nike, Inc. Structurally-colored articles and methods for making and using structurally-colored articles
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EP2079809A1 (fr) * 2006-11-10 2009-07-22 Sun Chemical Corporation Encres d'imprimerie à base d'eau pour substrats non tissés
US8759442B2 (en) 2006-11-10 2014-06-24 Sun Chemical Corporation Water based printing inks for nonwoven substrates
US8940821B2 (en) 2007-12-27 2015-01-27 Eastman Kodak Company Inks for high speed durable inkjet printing
WO2009085137A1 (fr) * 2007-12-27 2009-07-09 Eastman Kodak Company Encres durables pour impression jet d'encre à grande vitesse
EP3097158A4 (fr) * 2014-01-24 2017-09-20 Sun Chemical Corporation Revêtements aqueux
US10655026B2 (en) 2014-01-24 2020-05-19 Sun Chemical Corporation Water-based coatings
US10683435B2 (en) 2014-11-18 2020-06-16 Cascades Sonoco Inc. Wet coating compositions for paper substrates, paper substrates coated with the same and process for coating a paper substrate with the same
US9840642B2 (en) 2014-11-18 2017-12-12 Cascades Sonoco Inc. Wet coating compositions for paper substrates, paper substrates coated with the same and process for coating a paper substrate with the same
US11385382B2 (en) 2017-09-29 2022-07-12 Nike, Inc. Structurally-colored articles and methods for making and using structurally-colored articles
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US10928552B2 (en) * 2017-09-29 2021-02-23 Nike, Inc. Structurally-colored articles and methods for making and using structurally-colored articles
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