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WO1997036985A1 - Pain de detergent pour lessive, presentant une faible teneur en humidite et une stabilite d'enzyme amelioree - Google Patents

Pain de detergent pour lessive, presentant une faible teneur en humidite et une stabilite d'enzyme amelioree Download PDF

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Publication number
WO1997036985A1
WO1997036985A1 PCT/US1997/004650 US9704650W WO9736985A1 WO 1997036985 A1 WO1997036985 A1 WO 1997036985A1 US 9704650 W US9704650 W US 9704650W WO 9736985 A1 WO9736985 A1 WO 9736985A1
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WO
WIPO (PCT)
Prior art keywords
bar composition
moisture
cevu
binding agent
bar
Prior art date
Application number
PCT/US1997/004650
Other languages
English (en)
Inventor
Isauro Manuel E. Misajon
Rohan Govind Murkunde
Ma. Amelita Mirasol
Stanton Lane Boyer
Anastacia Rosario A. Barangan
Richard Tugao Lasap
Original Assignee
The Procter & Gamble Company
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Filing date
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Application filed by The Procter & Gamble Company filed Critical The Procter & Gamble Company
Publication of WO1997036985A1 publication Critical patent/WO1997036985A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/0047—Detergents in the form of bars or tablets
    • C11D17/0065—Solid detergents containing builders
    • C11D17/0069—Laundry bars
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66—Non-ionic compounds
    • C11D1/835—Mixtures of non-ionic with cationic compounds
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/0047—Detergents in the form of bars or tablets
    • C11D17/006—Detergents in the form of bars or tablets containing mainly surfactants, but no builders, e.g. syndet bar
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/12—Water-insoluble compounds
    • C11D3/124—Silicon containing, e.g. silica, silex, quartz or glass beads
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/38—Products with no well-defined composition, e.g. natural products
    • C11D3/386—Preparations containing enzymes, e.g. protease or amylase
    • C11D3/38645—Preparations containing enzymes, e.g. protease or amylase containing cellulase
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
    • C11D1/14—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aliphatic hydrocarbons or mono-alcohols
    • C11D1/146—Sulfuric acid esters
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
    • C11D1/22—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aromatic compounds
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/38—Cationic compounds
    • C11D1/52—Carboxylic amides, alkylolamides or imides or their condensation products with alkylene oxides
    • C11D1/523—Carboxylic alkylolamides, or dialkylolamides, or hydroxycarboxylic amides (R1-CO-NR2R3), where R1, R2 or R3 contain one hydroxy group per alkyl group

Definitions

  • This invention relates to a laundry detergent bar composition having a low moisture content with improved enzyme stability.
  • the process to make such compositions is also included herein.
  • laundry detergent bars comprising synthetic organic surfactants and detergency builders are used in the laundering of clothes.
  • Technical developments in the field of laundry detergent bars have concerned formulating bars which are effective in cleaning clothes; which have acceptable sudsing characteristics in warm and cool water and in hard and soft water; which have acceptable in-use wear rates, hardness, durability, and feel; which have low smear; and which have a pleasing odor and appearance.
  • Methods for making laundry detergent bars are also well known in the art.
  • Prior art disclosing laundry bars and methods for making laundry bars include: U.S. Pat. 3,178,370, Okenfuss, issued April 13, 1995; and Philippine Pat. 13,778, Anderson, issued September 23, 1980.
  • Enzymes have been added to laundry bar compositions as a performance additive to improve cleaning performance. Enzymes can be included in the present detergent compositions for a variety of purposes, including removal of protein-based, carbohydrate-based, or triglyceride-based stains from surfaces such as textiles, for the prevention of refugee dye transfer in laundering, and for fabric restoration. Typically, laundry bar compositions have contained enzymes such as proteases, cellulases, amylases and lipases, and mixtures thereof. See for example, PH 9809, Vasquez, issued March 26, 1976; and EP 425214 Lever, published May 2, 1991.
  • Cellulase enzymes are not suitably stable in a laundry bar composition over time.
  • the cellulase enzyme activity drops significantly during storage, thereby not delivering performance when used by the consumer at a later time. It has been observed that one type of cellulase's, CAREZYMETM, activity in the finished product dropped significantly to almost 50% of its original activity after three months of storage. It is therefore desired to maintain stability of the cellulase enzyme in the bar over time.
  • laundry bar compositions containing a low moisture content of about 4% and less in the finished product composition delivers significant improvement in cellulase stability in bars over time.
  • the present invention relates to a laundry detergent bar composition
  • a laundry detergent bar composition comprising:
  • a laundry detergent bar comprising a cellulase enzyme can achieve cellulase enzyme stability over time in a low moisture content bar composition.
  • Anionic synthetic surfactants which are suitable for use herein include the water-soluble salts, preferably the alkali metal, ammonium and alkylolammonium salts of organic sulfuric reaction products having in their molecular structure an alkyl group containing from about 10 to about 20 carbon atoms and a sulfonic acid or sulfuric acid ester group.
  • alkyl is the alkyl portion of acyl groups.
  • examples of this group of synthetic surfactants are the sodium and potassium alkyl sulfates, especially those obtained by sulfating the higher alcohols (C8-18 carbon atoms) such as those produced by reducing the glycerides of tallow or coconut oil; and the sodium and potassium alkyl benzene sulfonates in which the alkyl group contains from about 9 to about 15 carbon atoms, in straight chain or branched chain configuration, e.g., those of the type described in U.S. Patents 2,220,099 and 2,477,383.
  • linear straight chain alkyl benzene sulfonates in which the average number of carbon atoms in the alkyl group is from about 11 to 13, abbreviated as C-n_-j3 LAS.
  • the alkali metal salts, particularly the sodium salts of these surfactants are preferred.
  • anionic surfactants suitable for use herein are the sodium alkyl glyceryl ether sulfonates, especially those ethers of higher alcohols derived from tallow and coconut oil; sodium coconut oil fatty acid monoglyceride sulfonates and sulfates; and sodium or potassium salts of alkyl ethylene oxide ether sulfates containing about 1 to about 10 units of ethylene oxide per molecule and wherein the alkyl group contains from about 10 to about 20 carbon atoms.
  • suitable anionic surfactants include the water-soluble salts of esters of alpha-sulfonated fatty acids containing from about 6 to 20 carbon atoms in the fatty acid group and from about 1 to 10 carbon atoms in the ester group; water-soluble salts of 2-acyloxyalkane-1 -sulfonic acids containing from about 2 to 9 carbon atoms in the acyl group and from about 9 to about 23 carbon atoms in the alkane moiety; water-soluble salts of olefin and paraffin sulfonates containing from about 12 to 20 carbon atoms; and beta-alkyloxy alkane sulfonates containing from about 1 to 3 carbon atoms in the alkyl group and from about 8 to 20 carbon atoms in the alkane moiety.
  • anionic surfactants are C- ⁇ o-18
  • the amount of anionic surfactant in the compositions herein is from about 0.5% to about 60%, preferably from about 10% to about 30%.
  • Cellulase enzymes usable herein include both bacterial and fungal types, preferably having a pH optimum between 5 and 9.5.
  • U.S. 4,435,307, Barbesgoard et al, March 6, 1984 discloses suitable fungal cellulases from Humicola insolens or Humicola strain DSM1800 or a cellulase 212-producing fungus belonging to the genus Aeromonas, and cellulase extracted from the hepatopancreas of a marine mollusk, Dolabella Auricula Solander.
  • Suitable cellulases are also disclosed in GB-A-2.075.028; GB-A-2.095.275 and DE-OS- 2.247.832.
  • CAREZYMETM by Novo Nordisk A/S of Denmark, hereinafter "Novo" is especially useful. See also WO 9117243 to Novo.
  • the amount of cellulase used in the compositions should be an amount which provides from about The cellulase enzyme activity in the final bar composition is from about 0.10 CEVU (Cellulase Viscosity Unit) to about 100 CEVU, preferably from about 2 CEVU to about 25 CEVU, per gram of the finished product.
  • CEVU Cellulase Viscosity Unit
  • the determination of cellulase activity, measured by CEVU is defined in Novo Nordisk Analytical Methods, available from Novo Nordisk A/S of Denmark, such as Method No. AF253. Bar Physical Properties
  • the final bar composition should have no more than 4% moisture.
  • the bar will contain from 0.5% to 3% moisture, more preferably, 1.4% to 3%.
  • the moisture level can be determined by any methods known in the art by one skilled in the area of laundry bar compositions.
  • One common method is the Bidwell Sterling Distillation method.
  • Another known method is the Karl Fischer Moisture Titration Method. See AOCS official method Dd2a-59 issue 93 and AOCS official method Dd2b-59 issue 89.
  • non-liquid, thixotrophic binding agent is a non-liquid at ambient temperature.
  • non-liquid means having a melting point above 38° C.
  • Preferred levels of the binding agent are from about 0.5% to about 5%, most preferably from about 1% to about 2.5%.
  • Binding agents hold the bar together in a cohesive, soluble form.
  • the binding agent is non-liquid, having a moisture level of less than 0.5%, preferably 0% in the agent material.
  • the binding agent has thixotrophic properties, meaning that when shear force is applied to the binding agent, the material becomes fluid and helps the binding of the bar ingredients.
  • Acceptable binding agents include precipitated silica, C8-C18 fatty acid alkanol amides, natural and synthetic starches (plain or modified), guar gums and derivatives of guar gums, dextrin, polyethylene glycol (M.W. 1500-20,000) and mixtures thereof.
  • the binding agent is a fatty acid alkanol amide, where the alkanol can be an ethanol, methanol or propanol.
  • the alkanol amide can be a di-alkanol or mono-alkanol amide.
  • the binding agent is coco monoethanolamide.
  • the types and amount of binder chosen can affect bar hardness.
  • the amount of any particular binder should be chosen so as to provide a bar hardness (measured by the penetrometer) of about 1.1 to 2.2 mm after 24 hours of aging of the bar under normal atmospheric conditions.
  • the detergent bars of the present invention can contain optional ingredients commonly used in detergent products.
  • Optional detergent surfactants can be included at a level up to about 30%, more preferably from about 0.5 to about 10% , by weight of the composition.
  • the types of detergent surfactants that can be used as optional surfactants include cationic, nonionic, amphoteric and zwitterionic surfactants, and mixtures thereof. See U.S. Pat. No. 3,664,961 , issued to Norris on May 23, 1972, and EP 550,652, published on April 16, 1992.
  • the bars preferably contain builders including alkali metal pyrophosphates, tripolyphosphates and the higher polyphosphates such as trimetaphosphates and phosphate glasses.
  • Preferred builders are the alkali metal pyrophosphates and tripolyphosphates, particularly the sodium salts.
  • the builder can also be a non-phosphate detergent builder.
  • a non-phosphorous, inorganic detergency builder include water- soluble inorganic carbonate and bicarbonate salts.
  • the alkali metal (e.g., sodium and potassium) carbonates, bicarbonates, and silicates are particularly useful herein.
  • Other specifically preferred examples of builders include zeolite • and polycarboxylates.
  • Sodium carbonate is a particularly preferred ingredient in laundry bars, since in addition to its use as a builder, it can also provide alkalinity to the laundry bar for improved detergency, and also can serve as a neutralizing agent for acidic components added in the bar processing.
  • Sodium carbonate is particularly preferred as a neutralizing inorganic salt for an acid precursor of an anionic surfactant used in such laundry bars, such as the alkyl sulfuric acid and alkyl benzene sulfonic acid.
  • Co-polymers of acrylic acid and maleic acid are preferred as auxiliary builders, since it has been observed that their use in combination with the fabric softening clay and the clay flocculating agent further stabilizes and improves the clay deposition and fabric softening performance.
  • Optional alkaline builders include alkali metal pyrophosphates, tripolyphosphates and the higher polyphosphates such as trimetaphosphates, and phosphate glasses. See U S Pat. No. 3,664,961, issued to Norris on May 23, 1972, and EP 550,652, published on April 16, 1992.
  • Preferred builder levels range from about 0.5% to about 30%, more preferably, from about 5% to about 15%.
  • the bars can also contain other enzymes, besides cellulase enzymes, i.e. mixtures of cellulase enzymes and other enzymes.
  • Suitable enzymes include proteases, amylases, lipases, peroxidases, and mixtures thereof of any suitable origin, such as vegetable, animal, bacterial, fungal and yeast origin. Preferred selections are influenced by factors such as pH-activity and/or stability optima, thermostability, and stability to active detergents, builders and the like.
  • bacterial or fungal enzymes are preferred, such as bacterial amylases and proteases.
  • proteases are usually present in such commercial preparations at levels sufficient to provide from 0.005 to 0.1 Anson units (AU) of activity per gram in the final composition.
  • Suitable examples of proteases are the subtilisins which are obtained from particular strains of ⁇ . subtilis and B. licheniformis.
  • One suitable protease is obtained from a strain of Bacillus, having maximum activity throughout the pH range of 8-12, developed and sold as ESPERASETM by Novo Nordisk A/S of Denmark, hereinafter "Novo". The preparation of this enzyme and analogous enzymes is described in GB 1 ,243,784 to Novo.
  • proteases include ALCALASETM and SAVINASETM from Novo and -MAXATASETM from Intemational Bio-Synthetics, Inc., The Netherlands; as well as Protease A as disclosed in EP 130,756 A, January 9, 1985 and Protease B as disclosed in EP 303,761 A, April 28, 1987 and EP 130,756 A, January 9, 1985. See also a high pH protease from Bacillus sp. NCIMB 40338 described in WO 9318140 A to Novo. Enzymatic detergents comprising protease, one or more other enzymes, and a reversible protease inhibitor are described in WO 9203529 A to Novo.
  • proteases include those of WO 9510591 A to Procter & Gamble .
  • a protease having decreased adsorption and increased hydrolysis is available as described in WO 9507791 to Procter & Gamble.
  • a recombinant trypsin-like protease for detergents suitable herein is described in WO 9425583 to Novo.
  • Amylases suitable herein include, for example, amylases described in GB 1 ,296,839 to Novo; RAPIDASETM, International Bio-Synthetics, Inc. and TERMAMYLTM, Novo. FUNGAMYLTM from Novo is especially useful.
  • One class of highly preferred amylases herein have the commonality of being derived using site-directed mutagenesis from one or more of the Bacillus amylases, especially the Bacillus -amylases, regardless of whether one, two or multiple amylase strains are the immediate precursors.
  • Such preferred amylases include (a) an amylase according to the hereinbefore incorporated WO 9402597, Novo, Feb.
  • particularly preferred amylases herein include amylase variants having additional modification in the immediate parent as described in WO 9510603 A and are available from the assignee, Novo, as DURAMYLTM.
  • Other particularly preferred oxidative stability enhanced amylase include those described in WO 9418314 to Genencor International and WO 9402597 to Novo. Any other oxidative stability-enhanced amylase can be used, for example as derived by site-directed mutagenesis from known chimeric, hybrid or simple mutant parent forms of available amylases. Other preferred enzyme modifications are accessible. See WO 9509909 A to Novo.
  • Suitable lipase enzymes for detergent usage include those produced by microorganisms of the Pseudomonas group, such as Pseudomonas stutzeri ATCC 19.154, as disclosed in GB 1 ,372,034. See also lipases in Japanese Patent Application 53,20487, laid open Feb. 24, 1978. This lipase is available from Amano Pharmaceutical Co. Ltd., Nagoya, Japan, under the trade name Lipase P "Amano," or "Amano-P.” Other suitable commercial lipases include Amano-CES, lipases ex Chromobacter viscosum, e.g. Chromobacter viscosum var.
  • lipolyticum NRRLB 3673 from Toyo Jozo Co., Tagata, Japan; Chromobacter viscosum lipases from U.S. Biochemical Corp., U.S.A. and Disoynth Co., The Netherlands, and lipases ex Pseudomonas gladioli.
  • LIPOLASETM enzyme derived from Humicola lanuginosa and commercially available from Novo, see also EP 341 ,947, is a preferred lipase for use herein. Lipase and amylase variants stabilized against peroxidase enzymes are described in WO 9414951 A to Novo. See also WO 9205249 and RD 94359044.
  • Cutinase enzymes suitable for use herein are described in WO 8809367 A to Genencor.
  • Peroxidase enzymes may be used in combination with oxygen sources, e.g., percarbonate, perborate, hydrogen peroxide, etc., for "solution bleaching" or prevention of transfer of dyes or pigments removed from substrates during the wash to other substrates present in the wash solution.
  • oxygen sources e.g., percarbonate, perborate, hydrogen peroxide, etc.
  • Known peroxidases include horseradish peroxidase, ligninase, and haloperoxidases such as chloro- or bromo-peroxidase.
  • Peroxidase-containing detergent compositions are disclosed in WO 89099813 A, October 19, 1989 to Novo and WO 8909813 A to Novo.
  • a hydrotrope, or mixture of hydrotropes can be present in the laundry detergent bar.
  • Preferred hydrotropes include the alkali metal, preferably sodium, salts of toluene sulfonate, xylene sulfonate, cumene sulfonate, sulfosuccinate, and mixtures thereof.
  • the hydrotrope is added to the linear alkyl benzene sulfonic acid prior to its neutralization.
  • the hydrotrope will preferably be present at from about 0.5% to about 5% of the laundry detergent bar.
  • Fabric softening clay can be also present.
  • the fabric softening clay is preferably a smectite-type clay.
  • the smectite-type clays can be described as expandable, three-layer clays; i.e., alumino-silicates and magnesium silicates, having an ion exchange capacity of at least about 50 meq/100 g. of clay.
  • the clay particles are of a size that they can not be perceived tactilely, so as not to have a gritty feel on the treated fabric of the clothes.
  • the fabric softening clay can be added to the bar to provide about 1% to about 30% by weight of the bar, more preferably from about 5% to about 20%, and most preferably about 8% to 14%.
  • Gelwhite GP is an extremely white form of smectite-type clay and is therefore preferred when formulating white granular detergent compositions.
  • Volclay BC which is a smectite-type clay mineral containing at least 3% iron (expressed as Fe2 ⁇ 3) in the crystal lattice, and which has a very high ion exchange capacity, is one of the most efficient and effective clays for use in the instant compositions from the standpoint of product performance.
  • certain smectite-type clays are sufficiently contaminated by other silicate minerals that their ion exchange capacities fall below the requisite range; such clays are of no use in the instant compositions.
  • the polymeric clay flocculating agent is selected to provide improved deposition of the fabric softening clay.
  • Such materials have a high molecular weight, greater than about 100,000. Examples of such materials can include long chain polymers and copolymers derived from monomers such as ethylene oxide, acrylamide, acrylic acid, dimethylamino ethyl methacrylate, vinyl alcohol, vinyl pyrrolidone, and ethylene imine. Gums, like guar gums, are suitable as well.
  • the preferred clay flocculating agent is a poly(ethylene oxide) polymer.
  • a particularly preferred optional component of the present invention is a detergent chelant.
  • Such chelants are able to sequester and chelate alkali 10 cations (such as sodium, lithium and potassium), alkali metal earth cations (such as magnesium and calcium), and most importantly, heavy metal cations such as iron, manganese, zinc and aluminum.
  • Preferred cations include sodium, magnesium, zinc, and mixtures thereof.
  • the detergent chelant is particularly beneficial for maintaining good cleaning performance and improved surfactant mileage, despite the presence of the softening clay and the clay flocculating agent.
  • the detergent chelant is preferably a phosphonate chelant, particularly one selected from the group consisting of diethylenetriamine penta(methylene phosphonic acid), ethylene diamine tetra(methylene phosphonic acid), and mixtures and salts and complexes thereof, and an acetate chelant, particularly one selected from the group consisting of diethylenetriamine penta(acetic acid), ethylene diamine tetra(acetic acid), and mixtures and salts and complexes thereof.
  • Particularly preferred are sodium, zinc, magnesium, and aluminum salts and complexes of diethylenetriamine penta(methylene phosphonate) diethylenetriamine penta (acetate), and mixtures thereof.
  • such salts or complexes have a molar ratio of metal ion to chelant molecule of at least 1 :1, preferably at least 2: 1.
  • the detergent chelant can be included in the laundry bar at a level up to about 5%, preferably from about 0.1% to about 3%, more preferably from about 0.2% to about 2%, most preferably from about 0.5% to about 1.0%.
  • Such detergent chelant component can be used beneficially to improve the surfactant mileage of the present laundry bar, meaning that for a given level of anionic surfactant and level of detergent chelant, equivalent sudsing and cleaning performance can be achieved compared to a similar bar containing a higher level of the anionic surfactant but without the detergent chelant.
  • fatty alcohol having an alkyl chain of 8 to 22 carbon atoms, more preferably from 12 to 18 carbon atoms.
  • Fatty alcohol is effective at reducing the bar wear rate and smear (mushiness) of laundry bars.
  • a preferred fatty alcohol has an alkyl chain predominantly containing from 16 to 18 carbon atoms, so-called "high-cut fatty alcohol,” which can exhibit less base odor of fatty alcohol relative to broad cut
  • fatty alcohol is contained in the laundry bar at up to a level of 10%, more preferably from about 0.75% to about 6%, most preferably from about 2% to about 5%.
  • the fatty alcohol is generally added to a laundry bar as free fatty alcohol.
  • low levels of fatty alcohol can be introduced into the bars as impurities or as unreacted starting material.
  • laundry bars based on coconut fatty alkyl sulfate can contain, as unreacted starting material, from 0.1% to 3.5%, more typically from 2% to 3%, by weight of free coconut fatty alcohol on a coconut fatty alkyl sulfate basis.
  • a preferred optional component in the laundry bar is a dye transfer inhibiting (DTI) ingredient to prevent diminishing of color fidelity and intensity in fabrics.
  • DTI ingredient can include polymeric DTI materials capable of binding fugitive dyes to prevent them from depositing on the fabrics, and decolorization DTI materials capable of decolorizing the fugitives dye by oxidation.
  • An example of a decolorization DTI is hydrogen peroxide or a source of hydrogen peroxide, such as percarbonate or perborate.
  • Non-limiting examples of polymeric DTI materials include polyvinylpyrridine N-oxide, polyvinylpyrrolidone (PVP), PVP-polyvinylimidazole copolymer, and mixtures thereof. Copolymers of N-vinylpyrrolidone and N-vinylimidazole polymers (referred to as "PVP,”) are also preferred for use herein.
  • Another preferred optional component in the laundry bar is a secondary fabric softener component in addition to the softening clay.
  • Such materials can be used at levels of about 0.1% to 5%, more preferably from 0.3% to 3%, and can include: amines of the formula R4R5R6N, wherein R4 is C5 to C22 hydrocarbyl, R5 and R6 are independently Ci to C10 hydrocarbyl.
  • R4 is C5 to C22 hydrocarbyl
  • R5 and R6 are independently Ci to C10 hydrocarbyl.
  • One preferred amine is ditallowmethyl amine; complexes of such amines with fatty acid of the formula R7COOH, wherein R7 is Cg to C22 hydrocarbyl, as disclosed in EP No.
  • the bleaching component can be a source of "OOH group, such as sodium perborate monohydrate, sodium perborate tetrahydrate and sodium percarbonate.
  • Sodium percarbonate (2Na2CO3-3H2O2) is preferred since it has a dual function of both a source of HOOH and a source of sodium carbonate.
  • Another optional bleaching component is a peracid p_er se, such as a formula:
  • the bleaching component can contain, as a bleaching component stabilizer, a chelating agent of poiyaminocarboxylic acids, polyaminocarboxylates such as ethylenediaminotetraacetic acid, diethylenetriaminopentaacetic acid, and ethylenediaminodisuccinic acid, and their salts with water-soluble alkali metals.
  • the bleach components can be added to the bar at a level up to 20%, preferably from about 1% to about 10%, more preferably from about 2% to about 6%.
  • Sodium sulfate is a well-known filler that is compatible with the compositions of this invention. It can be a by-product of the surfactant sulfation and sulfonation processes, or it can be added separately. Other filler materials include bentonite and talc.
  • Calcium carbonate also known as Calcarb
  • Calcarb Calcium carbonate
  • Such materials are typically used at levels up to 40%, preferably from about 5% to about 25%.
  • Soil suspending agents can be used. In the present invention, their use is balanced with the fabric softening clay/clay flocculating agent combination to provide optimum cleaning and fabric softening performance. Soil suspending agents can also include water-soluble salts of carboxymethylcellulose and carboxyhydroxymethylcellulose.
  • a preferred soil suspending agent is an acrylic/maleic copolymer, commercially available as SokolanTM, from BASF Corp.
  • Other soil suspending agents include ethoxylated mono- and polyamines, and quaternary salts thereof.
  • Optical brighteners are also preferred optional ingredients in laundry bars of the present invention. Preferred optical brighteners are diamino stilbene, distyrilbiphenyl-type optical brighteners.
  • Such brighteners are 4,4'-bis ⁇ [4-anilino-6-bis(2-hydoxyethyl) amino-1 ,3,5-trizin-2- yl]amino ⁇ stilbene-2,2'-disulfonic acid disodium salt, 4-4'-bis(2-sulfostyryl) biphenyl and 4,4'-bis[(4-anilino-6-morpholino-1 ,3,5-triazin-2-yl) amino]stilbene- 2,2'-disulfonic acid disodium salt.
  • Such optical brighteners, or mixtures thereof can be used at levels in the bar of from about 0.05% - 1.0%.
  • Dyes, pigments, germicides, and perfumes can also be added to the bar composition. Processing
  • the detergent laundry bars of the present invention can be processed in conventional soap or detergent bar making equipment with some or all of the following key equipment: blender/mixer, mill or refining plodder, two- stage vacuum plodder, logo printer/cutter, cooling tunnel and wrapper.
  • blender/mixer mill or refining plodder
  • two- stage vacuum plodder two- stage vacuum plodder
  • logo printer/cutter logo printer/cutter
  • cooling tunnel and wrapper the raw materials are mixed in the blender.
  • the sodium salt of coco fatty alcohol sulfate and an alkaline inorganic salt preferably sodium carbonate
  • alkyl benzene sulfonic acid is reacted with the mixture to complete neutralization, the amount of alkaline inorganic salt sufficient to completely neutralize the acid.
  • a non-liquid, thixotrophic binder such as coco monoethanolamide (CMEA) and other optional surfactants are added, followed by any additional optional components such as chelants. It is most preferable to use as raw materials, such materials which contain little moisture.
  • the mixing can take from one minute to one hour, with the usual mixing time being from about two to twenty minutes.
  • the blender mix is charged to a surge tank.
  • the product is conveyed from the surge tank to the mill or refining plodder via a multi-worm conveyer.
  • the product is then conveyed to a double vacuum plodder, operating at high vacuum, e.g. 600 to 740 mm of mercury vacuum, so that entrapped air is removed.
  • high vacuum e.g. 600 to 740 mm of mercury vacuum
  • the product is extruded and cut to the desired bar length, and printed with the product brand name.
  • the printed bar can be cooled, for example in a cooling tunnel, before it is wrapped, cased, and sent to storage.
  • a preferred low moisture laundry bar composition is made by the following method:
  • the raw materials are first mixed in a blender.
  • a dry form (flakes, noodles, needles, ground powder) and a high active neutralized paste form of -sodium salt of coco fatty alcohol sulfate, sodium carbonate, and sodium tripolyphosphate is mixed for three minutes.
  • the amount of neutralized fatty alcohol sulfate paste with 25% to 35% moisture contains an amount of water that will not translate to more than 2.5% moisture by weight in the final composition.
  • a dose mixture of linear alkyl benzene sulfonic acid and sulfuric acid which have been pre-mixed for 1-1.5 minutes is then added to the blender, being completely neutralized by the sodium carbonate in the seat of the blender.
  • the amount of sodium carbonate is at least an amount sufficient to neutralize the acids.
  • the materials are mixed for an additional 1-2 minutes after dosing. Once the neutralization reaction is completed, a non-liquid, thixotrophic binder such as coco monoethanolamide (CMEA) and other optional surfactants are added, followed by any additional optional components such as chelants. It is most preferable to use as raw materials, such materials which contain little moisture, so as not to exceed 4% total moisture in the finished product.
  • the mixing can take from one minute to one hour, with the usual mixing time being from about five to ten minutes.
  • the blender mix is charged to a surge tank. The product is conveyed from the surge tank to the mill or refining plodder via a multi- worm conveyer.
  • the product is then conveyed to a double vacuum plodder, operating at high vacuum, e.g. 600 to 740 mm of mercury vacuum, so that entrapped air is removed.
  • high vacuum e.g. 600 to 740 mm of mercury vacuum
  • the product is extruded and cut to the desired bar length, and printed with the product brand name.
  • the printed bar can be cooled, for example in a cooling tunnel, before it is wrapped, cased, and sent to storage.
  • Examples A through E can be made using the method described above.
  • Examples A, D and E have an amount of cellulase enzyme which provides an activity of about 2.5 CEVU/g of the finished product.
  • Example B has an amount of cellulase enzyme which provides an activity of about 5 CEVU/g of the finished product.
  • Example C has - an amount of cellulase enzyme which provides an activity of about 10 CEVU/g of the finished product.
  • Coco fatty alcohol 1.0 1.0 1.0
  • the cellulase is CAREZYMETM
  • Coco fatty alcohol 1.0 1.0

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Detergent Compositions (AREA)

Abstract

L'invention concerne une composition de pain de détergent pour lessive, qui présente une faible teneur en humidité et une stabilité de cellulase améliorée. L'invention se rapporte également à un procédé pour fabriquer de telles compositions.
PCT/US1997/004650 1996-03-29 1997-03-21 Pain de detergent pour lessive, presentant une faible teneur en humidite et une stabilite d'enzyme amelioree WO1997036985A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU50383 1996-03-29
AU50383/96A AU5038396A (en) 1996-03-29 1996-03-29 Low moisture laundry detergent bar with improved enzyme stability

Publications (1)

Publication Number Publication Date
WO1997036985A1 true WO1997036985A1 (fr) 1997-10-09

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PCT/US1997/004650 WO1997036985A1 (fr) 1996-03-29 1997-03-21 Pain de detergent pour lessive, presentant une faible teneur en humidite et une stabilite d'enzyme amelioree

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Country Link
CN (1) CN1219960A (fr)
AU (1) AU5038396A (fr)
CO (1) CO5370700A1 (fr)
WO (1) WO1997036985A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0919611A1 (fr) * 1997-11-07 1999-06-02 Imaginative Research Associates, Inc. Barre de nettoyage ayant des niveaux élevés en liquides et en silice particulaire
WO2000005332A1 (fr) * 1998-07-22 2000-02-03 The Procter & Gamble Company Procede de fabrication d'un pain de detergent pour laver le linge
WO2000005333A1 (fr) * 1998-07-23 2000-02-03 The Procter & Gamble Company Procede de fabrication de tablettes de detergent a lessive presentant des proprietes physiques ameliorees
US6054425A (en) * 1996-05-20 2000-04-25 Imaginative Research Associates, Inc. Cleansing bar with high levels of emollients and particulate silica
WO2000040691A1 (fr) * 1999-01-06 2000-07-13 The Procter & Gamble Company Composition de barre detergente pour lessive
WO2000066696A1 (fr) * 1999-04-29 2000-11-09 Genencor International, Inc. Matrice detergente a base de cellulase
US6352964B1 (en) 1996-05-20 2002-03-05 Imaginative Research Associates, Inc. Cleansing bar with high levels of liquid and particulate silica

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3798181A (en) * 1970-11-03 1974-03-19 Colgate Palmolive Co Enzymatic detergent bar
PH13778A (en) * 1975-05-30 1980-09-23 Procter & Gamble Synthetic detergent laundry composition
EP0425214A2 (fr) * 1989-10-23 1991-05-02 Unilever Plc Compositions détergentes contenant un enzyme et leur utilisation
GB2271120A (en) * 1992-09-30 1994-04-06 Unilever Plc Shaped detergent composition comprising mutant subtilisin
GB2274849A (en) * 1993-02-05 1994-08-10 Unilever Plc Detergent bars containing enzymes.
WO1995027036A1 (fr) * 1994-03-30 1995-10-12 The Procter & Gamble Company Detergent en pains de lessive contenant de l'argile adoucissant le tissu et de la cellulase

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3798181A (en) * 1970-11-03 1974-03-19 Colgate Palmolive Co Enzymatic detergent bar
PH9809A (en) * 1970-11-03 1976-03-26 S Vasquez Enzymatic detergent bar
PH13778A (en) * 1975-05-30 1980-09-23 Procter & Gamble Synthetic detergent laundry composition
EP0425214A2 (fr) * 1989-10-23 1991-05-02 Unilever Plc Compositions détergentes contenant un enzyme et leur utilisation
GB2271120A (en) * 1992-09-30 1994-04-06 Unilever Plc Shaped detergent composition comprising mutant subtilisin
GB2274849A (en) * 1993-02-05 1994-08-10 Unilever Plc Detergent bars containing enzymes.
WO1995027036A1 (fr) * 1994-03-30 1995-10-12 The Procter & Gamble Company Detergent en pains de lessive contenant de l'argile adoucissant le tissu et de la cellulase

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6054425A (en) * 1996-05-20 2000-04-25 Imaginative Research Associates, Inc. Cleansing bar with high levels of emollients and particulate silica
US6352964B1 (en) 1996-05-20 2002-03-05 Imaginative Research Associates, Inc. Cleansing bar with high levels of liquid and particulate silica
EP0919611A1 (fr) * 1997-11-07 1999-06-02 Imaginative Research Associates, Inc. Barre de nettoyage ayant des niveaux élevés en liquides et en silice particulaire
WO2000005332A1 (fr) * 1998-07-22 2000-02-03 The Procter & Gamble Company Procede de fabrication d'un pain de detergent pour laver le linge
WO2000005333A1 (fr) * 1998-07-23 2000-02-03 The Procter & Gamble Company Procede de fabrication de tablettes de detergent a lessive presentant des proprietes physiques ameliorees
WO2000040691A1 (fr) * 1999-01-06 2000-07-13 The Procter & Gamble Company Composition de barre detergente pour lessive
WO2000066696A1 (fr) * 1999-04-29 2000-11-09 Genencor International, Inc. Matrice detergente a base de cellulase
US6565613B1 (en) 1999-04-29 2003-05-20 Genencor International, Inc. Cellulase detergent matrix

Also Published As

Publication number Publication date
CO5370700A1 (es) 2004-02-27
AU5038396A (en) 1997-10-02
CN1219960A (zh) 1999-06-16

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