WO1998018896A1 - Compositions lessivielle en pain a forte teneur en humidite ayant des proprietes physiques ameliorees - Google Patents

Compositions lessivielle en pain a forte teneur en humidite ayant des proprietes physiques ameliorees Download PDF

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Publication number
WO1998018896A1
WO1998018896A1 PCT/US1996/017622 US9617622W WO9818896A1 WO 1998018896 A1 WO1998018896 A1 WO 1998018896A1 US 9617622 W US9617622 W US 9617622W WO 9818896 A1 WO9818896 A1 WO 9818896A1
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WO
WIPO (PCT)
Prior art keywords
composition
moisture
bar
soap
starch
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PCT/US1996/017622
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English (en)
Inventor
Ganapathy Venkata Ramanan
Eric San Jose Robles
Liben Hailu
Noe Ongcoy Hidalgo
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The Procter & Gamble Company
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Priority to PCT/US1996/017622 priority Critical patent/WO1998018896A1/fr
Publication of WO1998018896A1 publication Critical patent/WO1998018896A1/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
    • C11D10/00—Compositions of detergents, not provided for by one single preceding group
    • C11D10/04—Compositions of detergents, not provided for by one single preceding group based on mixtures of surface-active non-soap compounds and soap
    • C11D10/042—Compositions of detergents, not provided for by one single preceding group based on mixtures of surface-active non-soap compounds and soap based on anionic surface-active compounds and soap
    • 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
    • C11D3/16—Organic compounds
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/22—Carbohydrates or derivatives thereof
    • C11D3/222—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
    • 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
    • C11D1/16—Sulfonic acids or sulfuric acid esters; Salts thereof derived from divalent or polyvalent alcohols
    • 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

Definitions

  • the present invention relates to laundry bar compositions having improved physical properties.
  • Synthetic laundry bars typically comprise a synthetic anionic surfactant such as the alkali metal salt of an alkyl benzene sulfonic acid or alkali metal salt of an alkyl sulfate and one or more alkaline builders such as alkali metal polyphosphates, carbonates or silicates.
  • the bars are often too soft and hard to handle by consumers.
  • fillers and other inorganic materials have been added to the composition in order to make hardened bars with acceptable physical properties. But adding fillers in the composition add no additional performance value to the consumers for the bars.
  • the amount of crystalline surfactant, such as soap can be increased in the bar composition in order to make hardened bars with acceptable physical properties. But adding higher amounts of crystalline surfactant is expensive and results in a higher formulation cost, which is undesirable to consumers.
  • alkyl means a hydrocarbyl moiety which is straight or branched, saturated or unsaturated. Unless otherwise specified, alkyl are preferably saturated or unsaturated with double bonds, preferably with one or two double bonds.
  • tallow is used herein in connection with materials with fatty acid mixtures which typically are linear and have an approximate carbon chain length distribution of 2% C14, 29% C ⁇ , 23% Cjs, 2% palmitoleic, 41% oleic, and 3% linoleic (the first three fatty acids listed are saturated). Other mixtures with similar distribution, such as those from palm oil and those derived from various animal tallow and lard, are also included within the term tallow.
  • the tallow can also be hardened (i.e, hydrogenated) to convert part or all of the unsaturated fatty acid moieties to saturated fatty acid moieties.
  • the term "coconut oil” is used herein in connection with materials with fatty acid mixtures which typically are linear and have an approximate carbon chain length distribution of about 8% C 8 , 7% C10, 48% C12, 17% C14, 9% Ci6, 2% C 18 , 7% oleic, and 2% linoleic (the first six fatty acids listed being saturated). Other sources having similar carbon chain length distribution in their fatty acids, such as palm kernel oil and babassu oil, are included within the term coconut oil.
  • Structured Soap Composition The structured soap composition of the present invention comprises a premixture of soap, starch, and moisture. These three components are mixed, preferably in a blender, to form a premixture. Of the final bar composition, the amount of structured soap composition is from about 45% to about 95%, preferably from about 55% to about 90%, most preferably from about 65% to about 86%.
  • the structured soap compositions of the subject invention comprise:
  • the ratio of starch to moisture content in the structured soap composition is from about 1 : 5 to about 1.25: 1, preferably 1 : 4 to about 1 : 1, most preferably from about 1 : 3 to about 1 : 2.
  • Starch is a carbohydrate made by molecules with linear or branched chains, mainly associated in micelles by hydrogen bonds or molecular water bridges.
  • the preferred starch is a normal (non-waxy) starch.
  • Starch is initially insoluble and becomes at least partially gelatinized during processing.
  • a preferred starch is corn starch because of its low cost and general availability, but any other water-insoluble starch may be used, such as wheat starch, tapioca starch, potato starch, rice starch, etc.
  • Moisture can be introduced into the premixture separately, for example by adding water, or can be brought into the mixture with the soap, such as with neat soap.
  • salts of fatty acids means salts of fatty acids.
  • the fatty acids are linear or branched containing from about 8 to about 24 carbon atoms, preferably from about 10 to about 20 carbon atoms.
  • the average carbon chain length for the fatty acid soaps is from about 12 to about 18 carbon atoms, preferably from about 14 to about 16 carbon atoms.
  • Preferred salts of the fatty acids are alkali metal salts, such as sodium and potassium, especially sodium. Also preferred salts are ammonium and alkylolammonium salts.
  • the fatty acids of soaps useful in the subject invention bars are preferably obtained from natural sources such as plant or animal esters; examples include coconut oil, palm oil, palm kernel oil, olive oil, peanut oil, corn oil, sesame oil, rice bran oil, cottonseed oil, babassu oil, soybean oil, castor oil, tallow, whale oil, fish oil, grease, lard, and mixtures thereof.
  • Preferred fatty acids are obtained from coconut oil, tallow, palm oil (palm stearin oil), palm kernel oil, and mixtures thereof.
  • Fatty acids can be synthetically prepared, for example, by the oxidation of petroleum, or by hydrogenation of carbon monoxide by the Fischer-Tropsch process.
  • Alkali metal soaps can be made by direct saponification of the fats and oils or by the neutralization of the free fatty acids which are prepared in a separate manufacturing process. Particularly useful are the sodium and potassium salts of the mixtures of fatty acids derived from coconut oil and tallow, i.e., sodium and potassium tallow and coconut soaps.
  • Preferred soap raw materials for the subject invention bars are soaps made from mixtures of fatty acids from tallow and coconut oil. Typical mixtures have tallowxoconut fatty acid ratios of 85:15, 80:20, 75:25, 70:30, and 50:50; preferred ratios are about 80:20 to 65:35.
  • Preferred soap raw materials for the subject invention are neat soaps made by kettle (batch) or continuous saponification.
  • Neat soaps typically comprise from about 65% to about 75%, preferably from about 67% to about 72%, alkali metal soap; from about 24% to about 34%, preferably from about 27% to about 32%, water; and minor amounts, preferably less than about 1% total, of residual materials and impurities, such as alkali metal chlorides, alkali metal hydroxides, alkali metal carbonates, glycerin, and free fatty acids.
  • Another preferred soap raw material is soap noodles or flakes, which are typically neat soap which has been dried to a water content of from about 10% to about 20%. The other components above are proportionally concentrated.
  • Synthetic anionic 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 (C ⁇ -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 C1 1.13 LAS.
  • the alkali metal salts, particularly the sodium salts of these surfactants are preferred.
  • Alkyl benzene sulfonates and processes for making them are disclosed in U.S. Patent Nos. 2,220,099 and 2,477,383.
  • 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.
  • Preparation of alkyl glyceryl ether sulfonates are described in detail in U.S. Pat. 3,024,273, Whyte et al., issued March 6, 1962.
  • AES alkyl ethoxy ether sulfates
  • R is alkyl of from about 10 to about 20 carbon atoms. On average, R is from about 13 to about 16. R is preferably saturated and linear.
  • x is an integer from 0.5 to about 20 and M is a water- soluble cation, for example, an alkali metal cation (e.g., sodium, potassium, lithium), preferably sodium or potassium, especially sodium.
  • the preferred AES surfactant has a saturated linear alkyl with an average of 14 to 15 carbon atoms, a range of from about 14 to about 15 carbon atoms, an average of about one ethoxy unit per molecule, and is a sodium salt (Ci4_i5AEiSO3Na).
  • suitable synthetic 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-l-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.
  • Preferred synthetic anionic surfactants are CJO-18 linear alkyl benzene sulfonates, CiO-14 alkyl glyceryl ether sulfonates, and C J O-18 a ⁇ yl sulfates.
  • the amount of synthetic anionic surfactant in the composition herein is from about 1% to about 15%, preferably from about 2% to about 12%, by weight of the composition. Moisture in Finished Bar Composition
  • the laundry bar compositions of the subject invention are high moisture bars.
  • the bars comprise from about 20% to about 40% moisture, preferably from about 20% to about 30% moisture, more preferably from about 23% to about 27% moisture, of the finished bar composition.
  • from about 29%) to about 35% of the total moisture in the final bar composition is the moisture level in the structured soap composition.
  • the laundry bars of the invention can contain from about 1% to about 50%, preferably from about 5% to about 30% detergent builder.
  • These detergent builders can be, for example, water-soluble alkali-metal salts of phosphate, pyrophosphates, orthophosphates, tripolyphosphates, higher polyphosphates, and mixtures thereof.
  • Preferred builders are a water-soluble alkali-metal salt of tripolyphosphate, and a mixture of tripolyphosphate and pyrophosphate.
  • the builder can also be a non- phosphate detergent builder. Specific examples of non-phosphate, inorganic detergency builders include water-soluble inorganic carbonate and bicarbonate salts.
  • alkali metal e.g., sodium and potassium carbonates, bicarbonates, and silicates are particularly useful herein.
  • Specific preferred examples of builders include sodium tripolyphosphates (STPP) and tetra sodium pyrophosphates (TSPP), and mixtures thereof.
  • Other specifically preferred examples of builders include zeolites and polycarboxylates.
  • Sodium carbonate is a particularly preferred ingredient in the subject invention compositions, since in addition to its use as a builder, it can also provide alkalinity to the composition for improved detergency, and also can serve as a neutralizing agent for acidic components added in the composition processing.
  • Sodium carbonate is particularly preferred as a neutralizing inorganic salt for an acid precursor of an anionic surfactant used in such compositions, such as the alkyl ether sulfuric acid and alkyl benzene sulfonic acid.
  • Co-polymers of acrylic acid and maleic acid are preferred in the subject compositions as auxiliary builders, since it has been observed that their use in combination with fabric softening clay and clay flocculating agents further stabilizes and improves the clay deposition and fabric softening performance.
  • a preferred optional component in the laundry bar is an oxygen bleach component.
  • the oxygen bleaching component can be a source of "OOH group, such as sodium perborate monohydrate, sodium perborate tetrahydrate and sodium percarbonate.
  • Sodium percarbonate (2Na2C ⁇ 3 # 3H2 ⁇ 2) 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 per se, such as a formula:
  • the bleaching component can contain, as a bleaching component stabilizer, a chelating agent of poly aminocarboxy lie acids, polyaminocarboxylates such as ethylenediaminotetraacetic acid, diethylenetriaminopentaacetic acid, and ethylenediaminodisuccinic acid, and their salts with water-soluble alkali metals.
  • the bleach components if any, can be added to the bar, if any, at a level up to 20%, preferably from about 1% to about 10%, more preferably from about 2% to about 6%.
  • oxygen bleach it is preferred that the dihydric alcohol be one wherein the two hydroxyl groups are separated by at least one carbon atom. Soil Suspending Agents
  • Soil suspending agents can be optionally 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.
  • One such soil suspending agent is an acrylic/maleic copolymer, commercially available as Sokolan®, from BASF Corp.
  • Other soil suspending agents include polyethylene glycols having a molecular weight of about 400 to 10,000, and ethoxylated mono- and polyamines, and quaternary salts thereof.
  • a highly preferred soil suspending agent is a water-soluble salt of carboxymethylcellulose and carboxyhydroxymethylcellulose. Soil suspending agents should be used at levels up to about 5%, preferably about 0.1-1%.
  • the detergent bars of the present invention can contain other optional ingredients commonly used in detergent products.
  • optional surfactants e.g. nonionic, zwitterionic and amphoteric surfactants
  • optional alkaline builders such as sodium carbonate trisodium phosphate sodium silicate, etc. and other ingredients useful herein appears in U.S. Pat. No. 3,664,961, issued to Norris on May 23, 1972, and EP 550,652, published on April 16, 1992.
  • optional surfactants if present, can be included at levels up to a total of about 10%, preferably about 0.5-3%.
  • 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, if present, will preferably be present at from about 0.5% to about 5% of the laundry detergent bar.
  • 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 50% by weight of the bar, more preferably from about 2% to about 20%, and most preferably about 3% 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.
  • Clay Flocculating Agent It has been found that the use of a clay flocculating agent in a laundry bar containing softening clay provides surprisingly improved softening clay deposition onto the clothes and clothes softening performance, compared to that of laundry bars comprising softening clay alone.
  • the polymeric clay flocculating agent is selected to provide improved deposition of the fabric softening clay. Typically 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. The amount of clay flocculating agent, if any, is about 0.2-2%, preferably about 0.5-1%.
  • a particularly preferred optional component of the present invention is a detergent chelant.
  • Such chelants are able to sequester and chelate alkali 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%.
  • Another preferred additional component of the laundry bar is fatty alcohol having an alkyl chain of 8 to 22 carbon atoms, more preferably from 12 to 18 carbon atoms.
  • 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 alcohols.
  • fatty alcohol if any, is present 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. However, 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 are also preferred for use herein.
  • the amount of DTI included in the subject compositions, if any, is about 0.05-5%, preferably about 0.2-2%.
  • 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, if any, 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 C9 to C22 hydrocarbyl, as disclosed in EP No.
  • Fillers may be optionally added to the bar composition.
  • Starch can also be used as a filler which is added before the milling stage in the manufacture of the bar composition, in addition to its use as one component of the structured soap composition.
  • 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) is also a well known and often used filler component of laundry bars.
  • Fillers include minerals, such as talc and hydrated magnesium silicate-containing minerals, where the silicate is mixed with other minerals, e.g., old mother rocks such as dolomite. Filler materials are typically used, if included, at levels up to 40%, preferably from about 5% to about 25%.
  • Binding agents for holding the bar together in a cohesive, soluble form can also be used, and include natural and synthetic starches, gums, thickeners, and mixtures thereof. Such materials, if included, are typically at levels up to about 3%, preferably about 0.5-2% Other adjunct materials
  • Glycerine is commonly incorporated in laundry bar compositions. If included, it is typically at concentrations up to about 3%, preferably about 0.5-1.5%.
  • 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-l,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-l,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. If included, they are typically at levels up to about 0.5%.
  • photobleach material particularly phthalocyanine photobleaches which are described in U.S. Patent 4,033,718 issued July 5, 1977, incorporated herein by reference.
  • Preferred photobleaches are metal phthalocyanine compounds, the metal preferably having a valance of +2 or +3; zinc and aluminum are preferred metals.
  • Such photobleaches are available, for example, under the tradename TLNOLUS or as zinc phthalocyanine sulfonate.
  • the photobleach components, if included, are typically in the subject compositions at levels up to about 0.02%, preferably from about 0.001% to about 0.015%, more preferably from about 0.002% to about 0.01%.
  • detergent enzymes are cellulase, lipase, protease, amylase, and mixtures thereof. Enzymes, if included, are typically at levels up to about 5%, preferably about 0.5-3%. Processing
  • the 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, refining plodder, two-stage vacuum plodder, logo printer/cutter, cooling tunnel and wrapper.
  • the raw materials are mixed in the blender.
  • the soap and starch are first premixed in the blender. It is necessary that the starch is mixed with the soap in the presence of moisture in order to form a premixture of these raw materials, forming the structured soap composition of this invention, before additional bar ingredients are added.
  • the preferred mixer type to be used is a high shear mixer. Suitable equipment can include: Sigma (single arm or double arms) blender, manufactured by Mazzoni; Winkworth RT 25 series, manufactured by Winkworth Machinery Ltd, Berkshire, UK; Eirich, series RV, manufactured by Gustau Eirich Hardheim, Germany; Lodige, series FM for batch mixing; series Baud KM for continuous mixing, manufactured by Lodige Machinenbau GmbH.
  • Other types of suitable mixers for this application are Twin Screw Extruders, supplied by APV Bakes (CP series), Werner and Pfleiderer (continua series).
  • the moisture level of the structured soap composition is preferably from about 25% to about 45%. It is not always necessary to add additional moisture by adding water; moisture can be introduced with the neat soap.
  • the structured soap composition is mixed for about 5 to 10 minutes, preferably five minutes, at a temperature of between 65° to 100° C.
  • Synthetic anionic surfactant is added into the structured soap composition in addition to optional ingredients such as alkaline inorganic salts, strong electrolyte salts, and fillers (preferably including sodium carbonate), and the resulting partly neutralized mixture is mechanically worked to effect homogeneity and to complete the neutralization of the mixture. Once the neutralization reaction is completed, optional other surfactants are added, followed by the builder and any additional optional components.
  • polyphosphate can be used as an alkaline salt in the neutralization.
  • the mixing can take from one minute to one hour, with the usual mixing time being from about ten to twenty minutes.
  • the blender mix is then charged to a surge tank.
  • the product is conveyed from the surge tank to the mill via a multi-screw conveyer.
  • the product is then conveyed to a double vacuum plodder, operating at high vacuum, e.g. 400 to 740 mm of mercury vacuum, so that entrapped air is removed.
  • high vacuum e.g. 400 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.
  • High moisture laundry bars of the present invention having the following compositions are prepared by the blending, milling and plodding procedures as described above.

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Abstract

La présente invention concerne une composition lessivielle en pain à forte teneur en humidité comprenant: a) environ 45 à 95 % d'une composition de savon structurée, laquelle inclue un prémélange 1) d'environ 45 à 75 % de savon; 2) d'environ 5 à 50 % d'amidon; ladite composition de savon structurée comprenant environ 25 à 45 % d'humidité; et 3) le rapport entre l'amidon et l'humidité dans ladite composition de savon structurée étant d'environ 1:5 à 1,25:1; et b) environ 1 à 15 % d'un tensio-actif anionique synthétique dans lequel l'humidité totale dans la composition en pain finie est d'environ 20 à 40 %. Une telle composition lessivielle satisfait aux exigences d'une composition lessivielle en pain ayant des propriétés physiques acceptables (traitement amélioré, bonnes propriétés d'utilisation du produit en pain et bonnes propriétés physiques de stockage), tout en conservant des propriétés de savonnage élevées. L'invention concerne également le procédé de fabrication de la composition lessivielle en pain à forte teneur en humidité susdécrite.
PCT/US1996/017622 1996-10-31 1996-10-31 Compositions lessivielle en pain a forte teneur en humidite ayant des proprietes physiques ameliorees WO1998018896A1 (fr)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1174494A1 (fr) * 2000-07-20 2002-01-23 Beiersdorf Aktiengesellschaft Pain de savon comprenant du talc, un ou plusieurs acides gras d'alkali et un ou plusieurs agents tensioactifs anioniques en absence d'oligoglycosides d'alkyl
WO2003085077A1 (fr) * 2002-04-11 2003-10-16 Beiersdorf Ag Produit moule a base de savon renfermant un ou plusieurs derives d'amidon pregelatinises et reticules
FR2938436A1 (fr) * 2008-11-18 2010-05-21 Natura Cosmeticos Sa Composition cosmetique pour le nettoyage de la peau
WO2011073139A1 (fr) 2009-12-16 2011-06-23 Unilever Plc Procédé permettant d'améliorer la rétention d'un parfum lors de l'entreposage ou l'éclosion d'un parfum à l'aide de savonnettes extrudées à basse teneur en matières grasses totales ayant un système structurant de type polyol issu de l'amidon
WO2011080101A1 (fr) 2009-12-29 2011-07-07 Unilever Plc Savonnettes extrudées à faible teneur en tmf, peu sujette à fissuration
US7981852B2 (en) 2009-12-16 2011-07-19 Conopco, Inc. Method of enhancing perfume retention during storage using low total fatty matter extruded bars having starch polyol structuring system
US7989410B2 (en) 2009-12-16 2011-08-02 Conopco, Inc. Method of enhancing perfume bloom in extruded diluted bars having low total fatty matter and using starch polyol structuring system
DE102012203688A1 (de) 2012-03-08 2013-09-12 Henkel Ag & Co. Kgaa Geformte Seifenprodukte mit einem verringerten Gehalt an Fettsäureseifen
WO2022258605A1 (fr) 2021-06-10 2022-12-15 Unilever Ip Holdings B.V. Barres de savon en gel de silice à teneur élevée en agent d'humidité et leur procédé de préparation
US12018231B2 (en) 2020-08-21 2024-06-25 Dow Global Technologies Llc Soap bar composition for high water structuring and binding

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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
US4808322A (en) * 1988-03-10 1989-02-28 Mclaughlin James H Skin cleansing-cream conditioning bar
US5264145A (en) * 1991-06-18 1993-11-23 The Procter & Gamble Company Personal cleansing freezer bar with selected fatty acid soaps and synthetic surfactant for reduced bathtub ring, improved mildness, and good lather
GB2277325A (en) * 1993-04-23 1994-10-26 Unilever Plc Detergent bar
US5520840A (en) * 1995-03-22 1996-05-28 Lever Brothers Company Detergent bars comprising water soluble starches
WO1996035772A1 (fr) * 1995-05-12 1996-11-14 The Procter & Gamble Company Batons de blanchissage a base de savon a fermete amelioree

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
PH13778A (en) * 1975-05-30 1980-09-23 Procter & Gamble Synthetic detergent laundry composition
US4808322A (en) * 1988-03-10 1989-02-28 Mclaughlin James H Skin cleansing-cream conditioning bar
US5264145A (en) * 1991-06-18 1993-11-23 The Procter & Gamble Company Personal cleansing freezer bar with selected fatty acid soaps and synthetic surfactant for reduced bathtub ring, improved mildness, and good lather
GB2277325A (en) * 1993-04-23 1994-10-26 Unilever Plc Detergent bar
US5520840A (en) * 1995-03-22 1996-05-28 Lever Brothers Company Detergent bars comprising water soluble starches
WO1996035772A1 (fr) * 1995-05-12 1996-11-14 The Procter & Gamble Company Batons de blanchissage a base de savon a fermete amelioree

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1174494A1 (fr) * 2000-07-20 2002-01-23 Beiersdorf Aktiengesellschaft Pain de savon comprenant du talc, un ou plusieurs acides gras d'alkali et un ou plusieurs agents tensioactifs anioniques en absence d'oligoglycosides d'alkyl
WO2003085077A1 (fr) * 2002-04-11 2003-10-16 Beiersdorf Ag Produit moule a base de savon renfermant un ou plusieurs derives d'amidon pregelatinises et reticules
FR2938436A1 (fr) * 2008-11-18 2010-05-21 Natura Cosmeticos Sa Composition cosmetique pour le nettoyage de la peau
WO2010058287A3 (fr) * 2008-11-18 2011-04-07 Natura Cosmeticos S.A. Composition cosmétique pour la purification de la peau
US8372791B2 (en) 2008-11-18 2013-02-12 Natura Cosmeticos S.A. Cosmetic composition for skin cleansing
US7981852B2 (en) 2009-12-16 2011-07-19 Conopco, Inc. Method of enhancing perfume retention during storage using low total fatty matter extruded bars having starch polyol structuring system
US7989410B2 (en) 2009-12-16 2011-08-02 Conopco, Inc. Method of enhancing perfume bloom in extruded diluted bars having low total fatty matter and using starch polyol structuring system
WO2011073139A1 (fr) 2009-12-16 2011-06-23 Unilever Plc Procédé permettant d'améliorer la rétention d'un parfum lors de l'entreposage ou l'éclosion d'un parfum à l'aide de savonnettes extrudées à basse teneur en matières grasses totales ayant un système structurant de type polyol issu de l'amidon
WO2011080101A1 (fr) 2009-12-29 2011-07-07 Unilever Plc Savonnettes extrudées à faible teneur en tmf, peu sujette à fissuration
DE102012203688A1 (de) 2012-03-08 2013-09-12 Henkel Ag & Co. Kgaa Geformte Seifenprodukte mit einem verringerten Gehalt an Fettsäureseifen
WO2013131708A1 (fr) 2012-03-08 2013-09-12 Henkel Ag & Co. Kgaa Produits savonniers façonnés à teneur réduite en savons d'acides gras
US12018231B2 (en) 2020-08-21 2024-06-25 Dow Global Technologies Llc Soap bar composition for high water structuring and binding
WO2022258605A1 (fr) 2021-06-10 2022-12-15 Unilever Ip Holdings B.V. Barres de savon en gel de silice à teneur élevée en agent d'humidité et leur procédé de préparation

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