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
  • C11D1/38—Cationic compounds
  • C11D1/62—Quaternary ammonium 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
  • C11D3/20—Organic compounds containing oxygen
  • C11D3/2075—Carboxylic acids-salts thereof
  • C11D3/2079—Monocarboxylic acids-salts thereof

Definitions

• the present invention relates to a fabric softening composition and to a method for its preparation. Specifically, the present invention relates to a fabric softening composition for use in the rinse step of a fabric washing process.
• the present invention relates to a fabric softening composition
• a fabric softening composition comprising:
• compositions of the invention may take a variety of forms such as pastes, liquids, tablets, etc. and also they may be impregnated with substrates, for example for use in tumble dryers.
• compositions of the invention are liquids comprising an aqueous base, wherein the active ingredients are dispersed.
• ester-linked quaternary ammonium materials for use in the compositions according to the invention can be represented by the formula: wherein each R1 group is independently selected from C1 ⁇ 4 alkyl, alkenyl or hydroxyalkyl groups; and wherein each R2 group is independently selected from C8 ⁇ 28 alkyl or alkenyl groups; T is -O-- - or - --O-; and n is an integer from 0-5.
• a preferred material of this class is Stepantex VRH 90 (STEPAN).
• a second preferred type of quaternary ammonium material can be represented by the formula: wherein R1, n and R2 are as defined above.
• Preferred materials of this class and their method of preparation are, for example, described in US 4 137 180 (LEVER BROTHERS).
• these materials comprise small amounts of the corresponding monoester as described in US 4 137 180 for example 1-tallowoxy, 2-hydroxy trimethyl ammonium propane chloride.
• the level of ester-linked quaternary ammonium compounds is at least 1% by weight of the composition, more preferably more than 3% by weight of the composition; especially interesting are compositions of high active level, e.g. which comprise more than 8% of the ester-linked quaternary ammonium compound.
• the level of ester-linked quaternary ammonium compounds preferably is less than 70% by weight of the composition, more preferably less than 50%, typically from 3 to 30% by weight of the composition.
• the fatty acid material or salt thereof can be any mono-, di- or tri-carboxylic acid comprising an alkyl or alkenyl chain having from 8 to 28 carbon atoms or salts thereof.
• Preferred fatty acid materials or their salts may be represented by the formula: R1COOR2 wherein R1 is a straight or branched alkyl or alkenyl chain having from 8 to 28 carbon atoms, and wherein R2 is hydrogen or a cation.
• Preferred cations are alkali metal ions or alkali earth metal ions; more preferred are sodium, potassium or calcium.
• a non-saponified fatty acid material is particularly preferred.
• the level of fatty acid material is more than 0.1% by weight of the composition, more preferably more than 0.2%; especially preferred are concentrated systems comprising more than 0.5% of fatty acid material.
• the level of fatty acid material will usually not exceed 50% by weight of the composition, more preferably the level of fatty acid material is less than 30%, typically from 0.5 to 10% by weight of the composition.
• the weight ratio of ester-linked quaternary ammonium materials to fatty acid materials is preferably from 10:1 to 1:10, more preferably from 8:1 to 1:1, especially preferably from 7:1 to 3:1.
• compositions of the invention preferably have a pH of more than 2.0.
• the pH is preferably less than 5.0 to prevent saponification of the fatty acids.
• the pH is 5.0 or more, more preferably between 5.0 and 8.0.
• compositions of the invention may, in addition to the above described two ingredients, also comprise other active ingredients such as further fabric conditioning materials.
• compositions of the invention do not comprise large amounts of conventional non-ester-linked quaternary ammonium comounds, more preferably the compositions of the invention are substantially free of these quaternary ammonium compounds.
• Suitable conditioning materials for inclusion in compositions of the invention comprise nonionic materials.
• Suitable nonionic fabric softening agents include glycerol esters, such as glycerol monostearate, fatty alcohols, such as stearyl alcohol, alkoxylated fatty alcohols, C9-C24 fatty acids and lanolin and derivatives thereof.
• Suitable materials are disclosed in European Patent Applications 88 520 (Unilever PLC/NV - Case C1325), 122 141 (Unilever PLC/NC - Case C1363) and 79 746 (Procter & Gamble).
• softening materials which may be incorporated in a composition of the invention are amines, such as, for instance, described in EP 89200545.5, or biodegradable amphoteric softening materials such as, for instance, described in EP 89200113.2.
• the amount of softening materials other than the above mentioned ester-linked materials and fatty acid materials is relatively low, i.e. the weight ratio of other softener materials to the total of the two essential softener components is preferably less than 2:1; more preferably less than 1:1, most preferably less than 0.5:1.
• the composition can also contain one or more optional ingredients selected from non-aqueous solvents such as C1-C4 alkanols and polyhydric alcohols, pH buffering agents such as strong or weak acids, e.g. HCl, H2SO4, phosphoric, benzoic or citric acids, rewetting agents, viscosity modifiers such as electrolytes, for example calcium chloride, anti-gelling agents, perfumes, perfume carriers, fluorescers, colourants, hydrotropes, anti-foaming agents, anti-redeposition agents, enzymes, optical brightening agents, opacifiers, stabilizers such as guar gum and polyethylene glycol, emulsifiers, anti-­shrinking agents, anti-wrinkle agents, fabric crisping agents, anti-spotting agents, soil-release agents, germicides, linear or branched silicones, fungicides, anti-oxidants, anti-corrosion agents, preservatives such as Bronopol (Trade Mark), a commercially available
• These optional ingredients are preferably present at levels up to 5% by weight of the composition.
• the liquid compositions according to the invention may be prepared by a variety of methods.
• One suitable method is to form a molten mixture of the ester-linked quaternary ammonium materials and the fatty acid materials, optionally in combination with other softening materials, and adding this premix to water with stirring to form a dispersion and thereafter adding any other optional ingredients.
• the fabric conditioning composition of the invention may be added to a large volume of water to form a liquor with which the fabrics to be treated are contacted.
• the total concentration of the ester-linked quaternary ammonium compound and the fatty acid compound in this liquor will be between about 30 ppm and 1000 ppm.
• the weight ratio of the fabrics to the liquor will generally be between 1:1 and 1:20.
• composition A is a commercially available fabric conditioner (KUSCHELWEICH) containing 4.5% by weight of dihardened tallow dimethyl ammonium chloride dispersed in water, pH 2.7.
• Composition B is a 5% by weight dispersion in water of Stepantex VRH 90; the pH of the product is 2.3.
• Composition C is a dispersion in water of 5% Stepantex VRH 90 and 0.83% of hardened tallow fatty acid; the pH of the product was 2.5.
• compositions comprising a combination of ester-linked quaternary ammonium compounds and fatty acid materials.
• composition D is a commercially available fabric conditioner (COCCOLINO CONCENTRATE).
• COCCOLINO CONCENTRATE a commercially available fabric conditioner
• compositions of 0.89 were requried for a 95% significance.
• composition F compared to compositions D and E.
• ester-linked quaternary ammonium materials suitable for use in compositions according to the invention are more biodegradable than quaternary ammonium materials which are more generally used.

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Cited By (28)

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Citations (7)

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• 1989
  • 1989-07-17 GB GB898916306A patent/GB8916306D0/en active Pending
• 1990
  • 1990-07-13 DE DE69023561T patent/DE69023561T2/de not_active Expired - Fee Related
  • 1990-07-13 ES ES90307691T patent/ES2080119T3/es not_active Expired - Lifetime
  • 1990-07-13 EP EP90307691A patent/EP0409502B1/de not_active Expired - Lifetime
  • 1990-07-16 AU AU59007/90A patent/AU640152B2/en not_active Ceased
  • 1990-07-17 JP JP2189298A patent/JP2611036B2/ja not_active Expired - Lifetime
  • 1990-07-17 CA CA002021322A patent/CA2021322C/en not_active Expired - Fee Related
  • 1990-07-17 BR BR909003453A patent/BR9003453A/pt not_active IP Right Cessation
  • 1990-07-17 ZA ZA905607A patent/ZA905607B/xx unknown

Patent Citations (7)

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