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
  • 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
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/37—Polymers
  • C11D3/3746—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • C11D3/3769—(Co)polymerised monomers containing nitrogen, e.g. carbonamides, nitriles or amines
  • C11D3/3776—Heterocyclic compounds, e.g. lactam

Definitions

• the present invention relates to laundry detergent compositions containing certain vinyl pyrrolidone copolymers .
• the compositions exhibit improved detergency on oily soils as well as reduced soil redeposition during the wash.
• Polyvinyl pyrrolidone and some related polymers are known ingredients of laundry detergent compositions, providing the benefit of reduced dye transfer between fabrics in a mixed load.
• Laundry detergent compositions containing polyvinyl pyrrolidone as a dye transfer inhibitor are disclosed, for example, in WO 92 18597A, WO 94 03567A, WO 95 03390A, WO 95 17496A, WO 95 27028A and WO 95 34627A (Procter & Gamble) , and WO 94 06354A, WO 94 24249A and WO 97 03166A (Henkel) .
• GB 1 354 498 discloses laundry detergent compositions containing vinyl pyrrolidone/vinyl acetate copolymers as antiredeposition agents. During the wash, the polymers effectively prevent or reduce redeposition onto washed fabrics of soil suspended in the wash liquor.
• vinyl pyrrolidone/vinyl alcohol copolymers are also effective to enhance oily soil detergency, especially in detergent compositions containing anionic surfactants, more especially alkylbenzene sulphonate .
• the present invention provides a the use of a water-soluble random copolymer of vinyl pyrrolidone and vinyl acetate in a laundry detergent composition comprising an organic surfactant and optionally a detergency builder to improve the oily soil detergency of the composition.
• PVP/PA copolymer The random copolymer of vinyl pyrrolidone/vinyl acetate used in accordance with the present invention will be referred to hereinafter for convenience as a PVP/PA copolymer.
• the PVP/PA copolymer preferably contains not more than 30 mole% of vinyl acetate (VA) monomer units. Copolymers containing higher proportions of VA units are less water- soluble and therefore less preferred. More preferably the copolymer contains not more than 50 mole% of VA units. Most preferably, the copolymer contains from 50 to 70 mole% of vinyl pyrrolidone (VP) monomer units and from 30 to 50 mole% of VA units.
• VA vinyl acetate
• the copolymer preferably has a molecular weight within the range of from 10 000 to 100 000, more preferably from 25 000 to 75 000.
• PVP/PA copolymers A wide selection of PVP/PA copolymers is available from International Speciality Products (ISP) . These are supplied as solutions (clear viscous liquids) in ethanol, isopropanol or water, or as solid (white powder) . Some examples are shown in the table below.
• ISP International Speciality Products
• the solutions have a solids content of approximately 50 wt%.
• PVP/PA copolymers are also available from BASF as the Luviskol (Trade Mark) VA series.
• the laundry detergent composition is a laundry detergent composition
• the polymer is present in an amount sufficient to enhance oily soil detergency.
• the polymer is present in an amount of from 0.5 to 3 wt%, preferably from 1 to 2 wt%.
• the detergent composition may suitably comprise:
• the organic surfactant is the organic surfactant
• the detergent composition in accordance with the invention may contain any organic surfactants (detergent-active compounds) suitable for incorporation into laundry detergent compositions .
• Detergent-active compounds may be chosen from soap and non-soap anionic, cationic, nonionic, amphoteric and zwitterionic detergent-active compounds, and mixtures thereof.
• suitable detergent-active compounds are available and are fully described in the literature, for example, in "Surface-Active Agents and Detergents", Volumes I and II, by Schwartz, Perry and Berch.
• the preferred detergent-active compounds that can be used are soaps and synthetic non-soap anionic and nonionic compounds.
• the total amount of surfactant present is suitably within the range of from 5 to 60 wt%, preferably from 5 to 40 wt%.
• Anionic surfactants are well-known to those skilled in the art. Examples include alkylbenzene sulphonates, particularly linear alkylbenzene sulphonates having an alkyl chain length of Cs-Cis; primary and secondary alkylsulphates, particularly C 8 -C 20 primary alkyl sulphates; alkyl ether sulphates; olefin sulphonates; alkyl xylene sulphonates; dialkyl sulphosuccinates; and fatty acid ester sulphonates.
• Sodium salts are generally preferred.
• Nonionic surfactants that may be used include the primary and secondary alcohol ethoxylates, especially the C 8 -C 20 aliphatic alcohols ethoxylated with an average of from 1 to 20 moles of ethylene oxide per mole of alcohol, and more especially the C 10 -C 15 primary and secondary aliphatic alcohols ethoxylated with an average of from 1 to 10 moles of ethylene oxide per mole of alcohol.
• Non-ethoxylated nonionic surfactants include alkylpolyglycosides, glycerol monoethers, and polyhydroxyamides (glucamide) .
• Cationic surfactants that may be used include quaternary ammonium salts of the general formula R 1 R 2 R 3 R 4 N X wherein the R groups are long or short hydrocarbyl chains, typically alkyl, hydroxyalkyl or ethoxylated alkyl groups, and X is a solubilising anion (for example, compounds in which Ri is a C 8 _C 2 alkyl group, preferably a C 8 -C 10 or C1 2 -C14 alkyl group, R 2 is a methyl group, and R 3 and R 4 , which may be the same or different, are methyl or hydroxyethyl groups) ; and cationic esters (for example, choline esters) .
• R 1 R 2 R 3 R 4 N X wherein the R groups are long or short hydrocarbyl chains, typically alkyl, hydroxyalkyl or ethoxylated alkyl groups, and X is a solubilising anion (for example, compounds in
• Amphoteric surfactants and/or zwitterionic surfactants may also be present.
• Preferred amphoteric surfactants are amine oxides. These are materials of the general formula R1R2R3 - )
• Ri is typically a Cg-Cie alkyl group, for example, C 12 -C 14 alkyl
• R 2 and R 3 which may be the same or different, are C 3. -C 3 alkyl or hydroxyalkyl groups, for example, methyl groups.
• the most preferred amine oxide is coco dimethylamine oxide .
• Preferred zwitterionic surfactants are betaines, and especially amidobetaines .
• Preferred betaines are C ⁇ -Ci ⁇ alkyl amidoalkylbetaines, for example, coco amidopropyl betaine (CAPB) .
• CAPB coco amidopropyl betaine
• the composition comprises a sulphonate anionic surfactant.
• the sulphonate anionic surfactant comprises linear alkylbenzene sulphonate (LAS) .
• the compositions contains from 3 to 30 wt%, more preferably from 10 to 25 wt%, of LAS.
• the optional detergency builder is not limited to 3 to 30 wt%, more preferably from 10 to 25 wt%, of LAS.
• the detergent compositions in accordance with the invention also contain one or more detergency builders.
• the total amount of detergency builder in the compositions may suitably range from 5 to 80 wt%, preferably from 10 to 60 wt%.
• Preferred builders are alkali metal aluminosilicates, more especially crystalline alkali metal aluminosilicates (zeolites) , preferably in sodium salt form.
• Zeolite builders may suitably be present in a total amount of from 5 to 60 wt%, preferably from 10 to 50 wt%.
• the zeolites may be supplemented by other inorganic builders, for example, amorphous aluminosilicates, or layered silicates such as SKS-6 ex Clariant .
• the zeolites may be supplemented by organic builders, for example, polycarboxylate polymers such as polyacrylates and acrylic/maleic copolymers; monomeric polycarboxylates such as citrates, gluconates, oxydisuccinates, glycerol mono-, di- and trisuccinates, carboxymethyloxysuccinates, carboxymethyloxymalonates, dipicolinates, hydroxyethyliminodiacetates, alkyl- and alkenylmalonates and succinates; and sulphonated fatty acid salts.
• polycarboxylate polymers such as polyacrylates and acrylic/maleic copolymers
• monomeric polycarboxylates such as citrates, gluconates, oxydisuccinates, glycerol mono-, di- and trisuccinates, carboxymethyloxysuccinates, carboxymethyloxymalonates, dipicolinates, hydroxyethyliminodiacetates, alkyl- and
• compositions in accordance with the invention may contain phosphate builders, for example, sodium tripolyphosphate .
• organic builders are citrates, suitably used in amounts of from 1 to 30 wt%, preferably from 2 to 15 wt%; and acrylic polymers, more especially acrylic/maleic copolymers, suitably used in amounts of from 0.5 to 15 wt%, preferably from 1 to 10 wt%.
• Builders both inorganic and organic, are preferably present in alkali metal salt, especially sodium salt, form.
• the detergency builder which is present in an amount of from 5 to 80 wt%, preferably from 10 to 60 wt%, is selected from sodium tripolyphosphate, zeolites, sodium carbonate and mixtures thereof .
• Detergent compositions in accordance with the invention may also suitably contain a bleach system.
• a bleach system Preferably this will include a peroxy bleach compound, for example, an inorganic persalt or an organic peroxyacid, capable of yielding hydrogen peroxide in aqueous solution.
• Preferred inorganic persalts are sodium perborate monohydrate and tetrahydrate, and sodium percarbonate, the latter being especially preferred.
• the sodium percarbonate may have a protective coating against destabilisation by moisture.
• the peroxy bleach compound is suitably present in an amount of from 5 to 35 wt%, preferably from 10 to 25 wt%.
• the peroxy bleach compound may be used in conjunction with a bleach activator (bleach precursor) to improve bleaching action at low wash temperatures.
• the bleach precursor is suitably present in an amount of from 1 to 8 wt%, preferably from 2 to 5 wt%.
• Preferred bleach precursors are peroxycarboxylic acid precursors, more especially peracetic acid precursors and peroxybenzoic acid precursors; and peroxycarbonic acid precursors.
• An especially preferred bleach precursor suitable for use in the present invention is N,N,N' ,N' -tetracetyl ethylenediamine (TAED) .
• a bleach stabiliser may also be present.
• Suitable bleach stabilisers include ethylenediamine tetraacetate (EDTA) , diethylenetriamine pentaacetate (DTPA) , ethylenediamine disuccinate (EDDS) , and the polyphosphonates such as the Dequests (Trade Mark) , ethylenediamine tetramethylene phosphonate (EDTMP) and diethylenetriamine pentamethylene phosphate (DETPMP) .
• compositions in accordance with the invention may contain alkali metal, preferably sodium, carbonate, in order to increase detergency and ease processing.
• Sodium carbonate may suitably be present in amounts ranging from 1 to 60 wt%, preferably from 2 to 40 wt%.
• sodium silicate may also be present.
• the amount of sodium silicate may suitably range from 0.1 to 5 wt%.
• Sodium silicate, as previously indicated, is preferably introduced via the second base granule .
• antiredeposition agents such as cellulosic polymers; soil release agents; anti-dye-transfer agents; fluorescers; inorganic salts such as sodium sulphate; enzymes (proteases, lipases, amylases, cellulases) ; dyes; coloured speckles; perfumes; and fabric conditioning compounds. This list is not intended to be exhaustive.
• compositions in accordance with the invention may be of any suitable physical form, for example, particulates (powders, granules, tablets), liquids, pastes, gels or bars.
• the detergent composition is in particulate form.
• Powders of low to moderate bulk density may be prepared by spray-drying a slurry, and optionally postdosing (dry- mixing) further ingredients.
• “Concentrated” or “compact” powders may be prepared by mixing and granulating processes, for example, using a high-speed mixer/granulator, or other non-tower processes.
• Tablets may be prepared by compacting powders, especially "concentrated” powders.
• liquid detergent compositions which may be prepared by admixing the essential and optional ingredients in any desired order to provide compositions containing the ingredients in the requisite concentrations.
• the polymers may be incorporated at any suitable stage in the manufacture of the compositions in accordance with the invention. As previously indicated, the polymers are commercially available both in solution form and in solid form.
• polymer in powder or solution preferably aqueous form may be incorporated in the slurry.
• polymer powder or solution may be easily introduced into mixing and granulating apparatus, either alone or in admixture with other solid or liquid ingredients as appropriate.
• wash liquors containing 1 g/litre or 2.5 g/litre of a notional detergent composition (the "product") containing linear alkylbenzene sulphonate (LAS) and sodium carbonate were prepared to the following general formulation:
• Detergency on white cotton cloth soiled with dirty motor oil was assessed using a high throughput small scale wash method.
• the wash was carried out in water of 20 (French) hardness (Ca:Mg 2:1), at a temperature of 20 C for 20 minutes .
• Whiteness before and after the wash was determined using the technique of colour change by image analysis using a greyness scale.
• the results are analogous to reflectance changes at 460 nm as measured by a reflectance spectrophotometer and are expressed as ⁇ R and ⁇ R.
• a detergent powder composition was prepared to the following formulation:
• Soil removal was determined using samples of woven white cotton cloth soiled with two different model oily soils coloured to increase visibility: soya bean oil coloured with violet dye, and mechanical grease mixed with carbon black. The assessments were carried out in tergotometers at a wash temperature of 20-25 C in water of 19 French hardness
• Example 17 the wash liquor for both soak and wash additionally included a 70:30 PVP/VA polymer (W735 ex ISP as described above) .
• the amounts used were:
• Soil removal was measured by whole spectrum reflectance spectrophotometry and expressed as soil removal index (SRI) , which is defined as

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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)
• Detergent Compositions (AREA)

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• 2002
  • 2002-08-10 GB GBGB0218636.9A patent/GB0218636D0/en not_active Ceased
• 2003
  • 2003-07-16 DE DE60308526T patent/DE60308526T2/de not_active Expired - Fee Related
  • 2003-07-16 BR BR0312344-8A patent/BR0312344A/pt not_active IP Right Cessation
  • 2003-07-16 AU AU2003250085A patent/AU2003250085A1/en not_active Abandoned
  • 2003-07-16 AT AT03792208T patent/ATE340240T1/de not_active IP Right Cessation
  • 2003-07-16 EP EP03792208A patent/EP1527154B1/de not_active Expired - Lifetime
  • 2003-07-16 ES ES03792208T patent/ES2273076T3/es not_active Expired - Lifetime
  • 2003-07-16 WO PCT/EP2003/007753 patent/WO2004018602A1/en active IP Right Grant
  • 2003-08-08 AR AR20030102873A patent/AR040833A1/es active IP Right Grant

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