EP3650526A1 - Compositions détergentes - Google Patents

Compositions détergentes Download PDF

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Publication number
EP3650526A1
EP3650526A1 EP18205047.6A EP18205047A EP3650526A1 EP 3650526 A1 EP3650526 A1 EP 3650526A1 EP 18205047 A EP18205047 A EP 18205047A EP 3650526 A1 EP3650526 A1 EP 3650526A1
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EP
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Prior art keywords
composition
total weight
composition according
weight based
mixtures
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EP18205047.6A
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German (de)
English (en)
Inventor
Hélder Daniel Peixoto da Silva
Katherine Mary Thompson
Jeremy Nicholas Winter
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Unilever PLC
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Unilever PLC
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Priority to EP18205047.6A priority Critical patent/EP3650526A1/fr
Publication of EP3650526A1 publication Critical patent/EP3650526A1/fr
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    • 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
    • C11D3/36—Organic compounds containing phosphorus
    • C11D3/361—Phosphonates, phosphinates or phosphonites
    • 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
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/10—Objects to be cleaned
    • C11D2111/12—Soft surfaces, e.g. textile

Definitions

  • the present invention relates to detergent compositions for the non-oxidative laundering of fabric stains.
  • Stains are usually caused by molecules of coloured substances deposited on or in fibres or in residual soil. Highly coloured stains are particularly difficult to remove. They often originate from polyphenolic compounds, such as the natural flavonoids found in tea and red wine.
  • Oxidizing bleaches such as peroxygen compounds have been used for the oxidative degradation and decolorisation of highly coloured stains. However, peroxygen compounds have reduced efficacy at lower temperatures and cannot generally be incorporated into liquid laundry detergents without storage stability problems. Oxidizing bleaches may also be unsuitable for prolonged or intensive use on coloured or delicate fabrics.
  • Transition metal sequestrants have been used to improve stain removal at low temperatures. However, the most effective of these tend to be phosphorus-based compounds. It would be desirable to improve the weight efficiency of such materials.
  • the present invention provides a detergent composition for the non-oxidative laundering of fabric stains, the composition comprising:
  • the invention also provides a method for the non-oxidative laundering of fabric stains, comprising diluting a dose of the detergent composition defined above to obtain a wash liquor, and washing the stained fabric with the wash liquor so formed.
  • A is preferably selected from linear or branched alkyl or alkenyl groups containing from 6 to 18 (more preferably from 10 to 14) carbon atoms and 0 or 1 (more preferably 0) double bonds.
  • Specific examples of such groups include n-hexyl, n-heptyl, n-octyl, 2-ethylhexyl, n- and iso-nonyl, n- and iso-decyl, n-undecyl, n-dodecyl, n-tetradecyl, n-hexadecyl, n-octadecyl and oleyl and mixtures thereof (as may typically be derived from natural fats and/or optionally hydrogenated natural oils, such as coconut oil, palm kernel oil or tallow).
  • A is most preferably selected from linear, saturated C 10-14 alkyl groups such as n-dodecyl.
  • the total amount of 1-hydroxy-1,1-bisphosphonates (a) in a composition of the invention preferably ranges from about 0.25 to 7.5%, more preferably from 0.5 to 6%, most preferably from 1 to 5% (by weight based on the total weight of the composition).
  • detergent composition in the context of this invention denotes formulated compositions intended for and capable of wetting and cleaning domestic laundry such as clothing, linens and other household textiles.
  • linen is often used to describe certain types of laundry items including bed sheets, pillow cases, towels, tablecloths, table napkins and uniforms.
  • Textiles can include woven fabrics, non-woven fabrics, and knitted fabrics; and can include natural or synthetic fibres such as silk fibres, linen fibres, cotton fibres, polyester fibres, polyamide fibres such as nylon, acrylic fibres, acetate fibres, and blends thereof including cotton and polyester blends.
  • detergent compositions include heavy-duty detergents for use in the wash cycle of automatic washing machines, as well as fine wash and colour care detergents such as those suitable for washing delicate garments (e.g. those made of silk or wool) either by hand or in the wash cycle of automatic washing machines.
  • detersive surfactant in the context of this invention denotes a surfactant which provides a detersive (i.e. cleaning) effect to laundry treated as part of a domestic laundering process.
  • detersive surfactant and the amount present, will depend on the intended use of the detergent composition. For example, different surfactant systems may be chosen for hand-washing products and for products intended for use in different types of automatic washing machine. The total amount of detersive surfactant present will also depend on the intended end use. In compositions for machine washing of fabrics, an amount of from 5 to 40%, such as 15 to 35% (by weight based on the total weight of the composition) is generally appropriate. Higher levels may be used in compositions for washing fabrics by hand, such as up to 60% (by weight based on the total weight of the composition.
  • Preferred detersive surfactants may be selected from non-soap anionic surfactants, nonionic surfactants and mixtures thereof.
  • Non-soap anionic surfactants are principally used to facilitate particulate soil removal.
  • Non-soap anionic surfactants for use in the invention are typically salts of organic sulfates and sulfonates having alkyl or alkenyl (preferably alkyl) groups containing from about 8 to about 22 (preferably from 10 to 18) carbon atoms, the terms "alkyl” and “alkenyl” being used to include the alkyl or alkenyl portions, respectively, of higher acyl groups.
  • alkyl sulfates examples include alkyl sulfates, alkyl ether sulfates, alkaryl sulfonates, alpha-olefin sulfonates and mixtures thereof, in which the alkyl groups contain from 10 to 18 carbon atoms.
  • the alkyl ether sulfates may contain from one to ten ethylene oxide or propylene oxide units per molecule, and preferably contain one to three ethylene oxide units per molecule.
  • the counterion for anionic surfactants is generally an alkali metal such as sodium or potassium; or an ammoniacal counterion such as monoethanolamine, (MEA) diethanolamine (DEA) or triethanolamine (TEA). Mixtures of such counterions may also be employed.
  • a preferred class of non-soap anionic surfactant for use in the invention includes alkylbenzene sulfonates, particularly linear alkylbenzene sulfonates (LAS) with a linear alkyl group having an alkyl chain length of from 10 to 18 carbon atoms.
  • LAS linear alkylbenzene sulfonates
  • Commercial LAS is a mixture of closely related isomers and alkyl chain homologues, each containing an aromatic ring sulfonated at the "para" position and attached to a linear alkyl group at any position except the terminal carbons.
  • the linear alkyl group typically has an alkyl chain length of from 11 to 15 carbon atoms, with the predominant materials having a chain length of about C12.
  • Each alkyl chain homologue consists of a mixture of all the possible sulfophenyl isomers except for the 1-phenyl isomer.
  • LAS is normally formulated into compositions in acid (i.e. HLAS) form and then at least partially neutralized in-situ.
  • alkyl ether sulfates having a straight or branched chain alkyl group having 10 to 18, more preferably 12 to 14 carbon atoms and containing an average of 1 to 3EO units per molecule.
  • a preferred example is sodium lauryl ether sulfate (SLES) in which the predominantly C12 lauryl alkyl group has been ethoxylated with an average of 3EO units per molecule.
  • alkyl sulfate surfactant may be used, such as non-ethoxylated primary and secondary alkyl sulphates with an alkyl group having an alkyl chain length of from 10 to 18.
  • a preferred mixture of non-soap anionic surfactants for use in the invention comprises linear alkylbenzene sulfonate (preferably C 11 to C 15 linear alkyl benzene sulfonate) and sodium lauryl ether sulfate (preferably C 10 to C 18 alkyl sulfate ethoxylated with an average of 1 to 3 EO).
  • the total level of non-soap anionic surfactant may suitably range from 5 to 30% (by weight based on the total weight of the composition).
  • Nonionic surfactants may provide enhanced performance for removing very hydrophobic oily soil and for cleaning hydrophobic polyester and polyester/cotton blend fabrics.
  • Nonionic surfactants for use in the invention are typically polyoxyalkylene compounds, i.e. the reaction product of alkylene oxides (such as ethylene oxide or propylene oxide or mixtures thereof) with starter molecules having a hydrophobic group and a reactive hydrogen atom which is reactive with the alkylene oxide.
  • Such starter molecules include alcohols, acids, amides or alkyl phenols. Where the starter molecule is an alcohol, the reaction product is known as an alcohol alkoxylate.
  • the polyoxyalkylene compounds can have a variety of block and heteric (random) structures.
  • the blocks can comprise a single block of alkylene oxide, or they can be diblock alkoxylates or triblock alkoxylates.
  • the blocks can be all ethylene oxide or all propylene oxide, or the blocks can contain a heteric mixture of alkylene oxides.
  • examples of such materials include aliphatic alcohol ethoxylates such as C 8 to C 18 primary or secondary linear or branched alcohol ethoxylates with an average of from 2 to 40 moles of ethylene oxide per mole of alcohol.
  • a preferred class of nonionic surfactant for use in the invention includes aliphatic C 8 to C 18 , more preferably C 12 to C 15 primary linear alcohol ethoxylates with an average of from 3 to 20, more preferably from 5 to 10 moles of ethylene oxide per mole of alcohol.
  • the total level of nonionic surfactant may suitably range from 0 to 25% (by weight based on the total weight of the composition).
  • a detergent composition of the invention may contain one or more cosurfactants (such as amphoteric (zwitterionic) and/or cationic surfactants) in addition to the non-soap anionic and/or nonionic detersive surfactants described above.
  • cosurfactants such as amphoteric (zwitterionic) and/or cationic surfactants
  • Specific cationic surfactants include C8 to C18 alkyl dimethyl ammonium halides and derivatives thereof in which one or two hydroxyethyl groups replace one or two of the methyl groups, and mixtures thereof.
  • Cationic surfactant when included, may be present in an amount ranging from 0.1 to 5% (by weight based on the total weight of the composition).
  • amphoteric (zwitterionic) surfactants include alkyl amine oxides, alkyl betaines, alkyl amidopropyl betaines, alkyl sulfobetaines (sultaines), alkyl glycinates, alkyl carboxyglycinates, alkyl amphoacetates, alkyl amphopropionates, alkylamphoglycinates, alkyl amidopropyl hydroxysultaines, acyl taurates and acyl glutamates, having alkyl groups containing from about 8 to about 22 carbon atoms, the term "alkyl” being used to include the alkyl portion of higher acyl groups.
  • Amphoteric (zwitterionic) surfactant when included, may be present in an amount ranging from 0.1 to 5% (by weight based on the total weight of the composition).
  • a detergent composition according to the invention may suitably be in liquid or particulate form, or a mixture thereof.
  • pill in the context of this invention denotes free-flowing or compacted solid forms such as powders, granules, pellets, flakes, bars, briquettes or tablets.
  • a particulate detergent composition according to the invention is a free-flowing powdered solid, with a loose (unpackaged) bulk density generally ranging from about 200g/l to about 1,300 g/l, preferably from about 400 g/l to about 1,000 g/l, more preferably from about 500g/l to about 900 g/l.
  • the detergent composition according to the invention is most preferably in liquid form.
  • liquid in the context of this invention denotes that a continuous phase or predominant part of the composition is liquid, and that the composition is flowable at 15°C and above. Accordingly, the term “liquid” may encompass emulsions, suspensions, and compositions having flowable yet stiffer consistency, known as gels or pastes.
  • the viscosity of the composition may suitably range from about 200 to about 10,000 mPa.s at 25°C at a shear rate of 21 sec -1 . This shear rate is the shear rate that is usually exerted on the liquid when poured from a bottle.
  • Pourable liquid compositions generally have a viscosity of from 200 to 2,500 mPa.s, preferably from 200 to 1500 mPa.s.
  • Liquid compositions which are pourable gels generally have a viscosity of from 1,500 mPa.s to 6,000 mPa.s, preferably from 1,500 mPa.s to 2,000 mPa.s.
  • a liquid detergent composition according to the invention may generally comprise from 5 to 95%, preferably from 10 to 90%, more preferably from 15 to 85% water (by weight based on the total weight of the composition).
  • the composition may also incorporate non-aqueous carriers such as hydrotropes, co-solvents and phase stabilizers.
  • Such materials are typically low molecular weight, water-soluble or water-miscible organic liquids such as C1 to C5 monohydric alcohols (such as ethanol and n- or i-propanol); C2 to C6 diols (such as monopropylene glycol and dipropylene glycol); C3 to C9 triols (such as glycerol); polyethylene glycols having a weight average molecular weight (M w ) ranging from about 200 to 600; C1 to C3 alkanolamines such as mono-, di- and triethanolamines; and alkyl aryl sulfonates having up to 3 carbon atoms in the lower alkyl group (such as the sodium and potassium xylene, toluene, ethylbenzene and isopropyl benzene (cumene) sulfonates).
  • C1 to C5 monohydric alcohols such as ethanol and n- or i-propanol
  • Non-aqueous carriers when included in a liquid detergent composition according to the invention, may be present in an amount ranging from 0.1 to 20%, preferably from 1 to 15%, and more preferably from 3 to 12% (by weight based on the total weight of the composition).
  • a detergent composition according to the invention may contain one or more builders.
  • Builders enhance or maintain the cleaning efficiency of the surfactant, primarily by reducing water hardness. This is done either by sequestration or chelation (holding hardness minerals in solution), by precipitation (forming an insoluble substance), or by ion exchange (trading electrically charged particles).
  • Builders for use in the invention can be of the organic or inorganic type, or a mixture thereof. Non-phosphate builders are preferred.
  • Inorganic, non-phosphate builders for use in the invention include hydroxides, carbonates, silicates, zeolites, and mixtures thereof.
  • Suitable hydroxide builders for use in the invention include sodium and potassium hydroxide.
  • Suitable carbonate builders for use in the invention include mixed or separate, anhydrous or partially hydrated alkali metal carbonates, bicarbonates or sesquicarbonates.
  • the alkali metal is sodium and/or potassium, with sodium carbonate being particularly preferred.
  • Suitable silicate builders include amorphous forms and/or crystalline forms of alkali metal (such as sodium) silicates.
  • alkali metal such as sodium
  • Preferred are crystalline layered sodium silicates (phyllosilicates) of the general formula (I) NaMSi x O 2x+1 .yH 2 O (I) in which M is sodium or hydrogen, x is a number from 1.9 to 4, preferably 2 or 3 and y is a number from 0 to 20.
  • Sodium disilicates of the above formula in which M is sodium and x is 2 are particularly preferred.
  • Such materials can be prepared with different crystal structures, referred to as ⁇ , ⁇ , ⁇ and ⁇ phases, with ⁇ -sodium disilicate being most preferred.
  • Zeolites are naturally occurring or synthetic crystalline aluminosilicates composed of (SiO 4 ) 4- and (AlO 4 ) 5- tetrahedra, which share oxygen-bridging vertices and form cage-like structures in crystalline form.
  • the frameworks acquire their negative charge by substitution of some Si by Al. The negative charge is neutralised by cations and the frameworks are sufficiently open to contain, under normal conditions, mobile water molecules.
  • Suitable zeolite builders for use in the invention may be defined by the general formula (II): Na x [(AlO 2 ) x (SiO 2 ) y ] ⁇ zH 2 O (II) in which x and y are integers of at least 6, the molar ratio of x to y is in the range from about 1 to about 0.5, and z is an integer of at least 5, preferably from about 7.5 to about 276, more preferably from about 10 to about 264.
  • Preferred inorganic, non-phosphate builders for use in the invention may be selected from zeolites (of the general formula (II) defined above), sodium carbonate, ⁇ -sodium disilicate and mixtures thereof.
  • Suitable organic, non-phosphate builders for use in the invention include polycarboxylates, in acid and/or salt form.
  • alkali metal e.g. sodium and potassium
  • alkanolammonium salts are preferred.
  • Specific examples of such materials include sodium and potassium citrates, sodium and potassium tartrates, the sodium and potassium salts of tartaric acid monosuccinate, the sodium and potassium salts of tartaric acid disuccinate, sodium and potassium ethylenediaminetetraacetates, sodium and potassium N(2-hydroxyethyl)-ethylenediamine triacetates, sodium and potassium nitrilotriacetates and sodium and potassium N-(2-hydroxyethyl)-nitrilodiacetates.
  • Polymeric polycarboxylates may also be used, such as polymers of unsaturated monocarboxylic acids (e.g. acrylic, methacrylic, vinylacetic, and crotonic acids) and/or unsaturated dicarboxylic acids (e.g. maleic, fumaric, itaconic, mesaconic and citraconic acids and their anhydrides).
  • unsaturated monocarboxylic acids e.g. acrylic, methacrylic, vinylacetic, and crotonic acids
  • unsaturated dicarboxylic acids e.g. maleic, fumaric, itaconic, mesaconic and citraconic acids and their anhydrides
  • Specific examples of such materials include polyacrylic acid, polymaleic acid, and copolymers of acrylic and maleic acid.
  • the polymers may be in acid, salt or partially neutralised form and may suitably have a molecular weight (Mw) ranging from about 1,000 to 100,000, preferably from about 2,000 to about 85,000, and more
  • Preferred organic, non-phosphate builders for builders for use in the invention may be selected from polycarboxylates (e.g. citrates) in acid and/or salt form and mixtures thereof.
  • polycarboxylates e.g. citrates
  • the level of phosphate builders in a detergent composition of the invention is no more than 0.2%, preferably from 0 to 0.1%, more preferably from 0 to 0.01% and most preferably 0% (by weight based on the total weight of the composition).
  • phosphate builder in the context of this invention denotes alkali metal, ammonium and alkanolammonium salts of polyphosphate, orthophosphate, and/or metaphosphate (e.g. sodium tripolyphosphate).
  • the overall level of builder when included, may range from about 0.1 to about 80%, preferably from about 0.5 to about 50% (by weight based on the total weight of the composition).
  • a detergent composition according to the invention may contain additional transition metal ion sequestrants.
  • additional transition metal ion sequestrants include aminotris(methylene phosphonic acid) (ATMP), 1-hydroxyethylidene diphosphonic acid (HEDP) and diethylenetriamine penta(methylene phosphonic acid (DTPMP) and their respective sodium or potassium salts. Mixtures of any of the above described materials may also be used.
  • the level of such additional transition metal ion sequestrants in a detergent composition of the invention is typically no more than 0.2%, preferably from 0 to 0.1%, more preferably from 0 to 0.01% and most preferably 0% (by weight based on the total weight of the composition).
  • a particulate detergent composition of the invention may include one or more fillers to assist in providing the desired density and bulk to the composition.
  • Suitable fillers for use in the invention may generally be selected from neutral salts with a solubility in water of at least 1 gram per 100 grams of water at 20° C; such as alkali metal, alkaline earth metal, ammonium or substituted ammonium chlorides, fluorides, acetates and sulfates and mixtures thereof.
  • Preferred fillers for use in the invention include alkali metal (more preferably sodium and/or potassium) sulfates and chlorides and mixtures thereof, with sodium sulfate and/or sodium chloride being most preferred.
  • Filler when included, may be present in a total amount ranging from about 1 to about 80%, preferably from about 5 to about 50% (by weight based on the total weight of the composition).
  • a detergent composition according to the invention may include one or more polymeric cleaning boosters such as antiredeposition polymers, soil release polymers and mixtures thereof.
  • Anti-redeposition polymers stabilise the soil in the wash solution thus preventing redeposition of the soil.
  • Suitable anti-redeposition polymers for use in the invention include alkoxylated polyethyleneimines.
  • Polyethyleneimines are materials composed of ethylene imine units -CH 2 CH 2 NH- and, where branched, the hydrogen on the nitrogen is replaced by another chain of ethylene imine units.
  • Preferred alkoxylated polyethylenimines for use in the invention have a polyethyleneimine backbone of about 300 to about 10000 weight average molecular weight (M w ).
  • the polyethyleneimine backbone may be linear or branched. It may be branched to the extent that it is a dendrimer.
  • the alkoxylation may typically be ethoxylation or propoxylation, or a mixture of both.
  • a nitrogen atom is alkoxylated
  • a preferred average degree of alkoxylation is from 10 to 30, preferably from 15 to 25 alkoxy groups per modification.
  • a preferred material is ethoxylated polyethyleneimine, with an average degree of ethoxylation being from 10 to 30, preferably from 15 to 25 ethoxy groups per ethoxylated nitrogen atom in the polyethyleneimine backbone.
  • Another type of suitable anti-redeposition polymer for use in the invention includes cellulose esters and ethers, for example sodium carboxymethyl cellulose.
  • the overall level of anti-redeposition polymer when included, may range from 0.05 to 6%, more preferably from 0.1 to 5% (by weight based on the total weight of the composition).
  • Soil release polymers help to improve the detachment of soils from fabric by modifying the fabric surface during washing.
  • the adsorption of a SRP over the fabric surface is promoted by an affinity between the chemical structure of the SRP and the target fibre.
  • SRPs for use in the invention may include a variety of charged (e.g. anionic) as well as non-charged monomer units and structures may be linear, branched or star-shaped.
  • the SRP structure may also include capping groups to control molecular weight or to alter polymer properties such as surface activity.
  • the weight average molecular weight (M w ) of the SRP may suitably range from about 1000 to about 20,000 and preferably ranges from about 1500 to about 10,000.
  • SRPs for use in the invention may suitably be selected from copolyesters of dicarboxylic acids (for example adipic acid, phthalic acid or terephthalic acid), diols (for example ethylene glycol or propylene glycol) and polydiols (for example polyethylene glycol or polypropylene glycol).
  • the copolyester may also include monomeric units substituted with anionic groups, such as for example sulfonated isophthaloyl units.
  • oligomeric esters produced by transesterification/oligomerization of poly(ethyleneglycol) methyl ether, dimethyl terephthalate (“DMT”), propylene glycol (“PG”) and poly(ethyleneglycol) (“PEG”); partly- and fully-anionic-end-capped oligomeric esters such as oligomers from ethylene glycol ("EG”), PG, DMT and Na-3,6-dioxa-8-hydroxyoctanesulfonate; nonionic-capped block polyester oligomeric compounds such as those produced from DMT, Me-capped PEG and EG and/or PG, or a combination of DMT, EG and/or PG, Me-capped PEG and Na-dimethyl-5-sulfoisophthalate, and copolymeric blocks of ethylene terephthalate or propylene terephthalate with polyethylene oxide or polypropylene oxide terephthalate
  • cellulosic derivatives such as hydroxyether cellulosic polymers, C 1 -C 4 alkylcelluloses and C 4 hydroxyalkyl celluloses
  • Preferred SRPs for use in the invention include copolyesters formed by condensation of terephthalic acid ester and diol, preferably 1,2 propanediol, and further comprising an end cap formed from repeat units of alkylene oxide capped with an alkyl group. Examples of such materials have a structure corresponding to general formula (II):
  • n, n and a are not necessarily whole numbers for the polymer in bulk.
  • the overall level of SRP when included, may range from 0.1 to 10%, preferably from 0.3 to 7%, more preferably from 0.5 to 5% (by weight based on the total weight of the composition).
  • a detergent composition according to the invention may in some cases contain one or more fatty acids and/or salts thereof.
  • Suitable fatty acids in the context of this invention include aliphatic carboxylic acids of formula RCOOH, where R is a linear or branched alkyl or alkenyl group containing from 6 to 24, more preferably 10 to 22, most preferably from 12 to 18 carbon atoms and 0 or 1 double bond.
  • R is a linear or branched alkyl or alkenyl group containing from 6 to 24, more preferably 10 to 22, most preferably from 12 to 18 carbon atoms and 0 or 1 double bond.
  • saturated C12-18 fatty acids such as lauric acid, myristic acid, palmitic acid or stearic acid
  • fatty acid mixtures in which 50 to 100% (by weight based on the total weight of the mixture) consists of saturated C12-18 fatty acids.
  • Such mixtures may typically be derived from natural fats and/or optionally hydrogenated natural oils (such as coconut oil, palm kernel oil or tallow).
  • the fatty acids may be present in the form of their sodium, potassium or ammonium salts and/or in the form of soluble salts of organic bases, such as mono-, di- or triethanolamine.
  • Fatty acids and/or their salts when included, may be present in an amount ranging from about 0.25 to 5%, more preferably from 0.5 to 5%, most preferably from 0.75 to 4% (by weight based on the total weight of the composition).
  • fatty acids and/or their salts are not included in the level of surfactant or in the level of builder.
  • a liquid detergent composition according to the invention may comprise one or more rheology modifiers.
  • rheology modifiers include polymeric thickeners and/or structurants such as hydrophobically modified alkali swellable emulsion (HASE) copolymers.
  • HASE copolymers for use in the invention include linear or crosslinked copolymers that are prepared by the addition polymerization of a monomer mixture including at least one acidic vinyl monomer, such as (meth)acrylic acid (i.e. methacrylic acid and/or acrylic acid); and at least one associative monomer.
  • associative monomer in the context of this invention denotes a monomer having an ethylenically unsaturated section (for addition polymerization with the other monomers in the mixture) and a hydrophobic section.
  • a preferred type of associative monomer includes a polyoxyalkylene section between the ethylenically unsaturated section and the hydrophobic section.
  • Preferred HASE copolymers for use in the invention include linear or crosslinked copolymers that are prepared by the addition polymerization of (meth)acrylic acid with (i) at least one associative monomer selected from linear or branched C 8 -C 40 alkyl (preferably linear C 12 -C 22 alkyl) polyethoxylated (meth)acrylates; and (ii) at least one further monomer selected from C 1 -C 4 alkyl (meth) acrylates, polyacidic vinyl monomers (such as maleic acid, maleic anhydride and/or salts thereof) and mixtures thereof.
  • the polyethoxylated portion of the associative monomer (i) generally comprises about 5 to about 100, preferably about 10 to about 80, and more preferably about 15 to about 60 oxyethylene repeating units.
  • Polymeric thickeners when included, may be present in an amount ranging from 0.1 to 5% (by weight based on the total weight of the composition).
  • a liquid detergent composition according to the invention may also have its rheology modified by use of one or more external structurants which form a structuring network within the composition.
  • external structurants include hydrogenated castor oil, microfibrous cellulose and citrus pulp fibre.
  • the presence of an external structurant may provide shear thinning rheology and may also enable materials such as encapsulates and visual cues to be suspended stably in the liquid.
  • a detergent composition according to the invention may comprise an effective amount of one or more enzymes selected from the group comprising, pectate lyase, protease, amylase, cellulase, lipase, mannanase and mixtures thereof.
  • the enzymes are preferably present with corresponding enzyme stabilizers.
  • a liquid detergent composition according to the invention preferably has a pH in the range of 5 to 9, more preferably 6 to 8, when measured on dilution of the composition to 1% (by weight based on the total weight of the composition) using demineralised water.
  • a detergent composition of the invention may contain further optional ingredients to enhance performance and/or consumer acceptability.
  • ingredients include fragrance oils, foam boosting agents, preservatives (e.g. bactericides), antioxidants, sunscreens, anticorrosion agents, colorants, pearlisers and/or opacifiers, and shading dye.
  • preservatives e.g. bactericides
  • sunscreens e.g. bactericides
  • anticorrosion agents colorants
  • pearlisers and/or opacifiers e.g. opacifiers
  • a detergent composition of the invention generally contains no more than 0.2%, preferably from 0 to 0.1%, more preferably from 0 to 0.01% and most preferably 0% (by weight based on the total weight of the composition) of transition metal ions selected from Fe (III), Co (II), Co (III), Mn (II), Mn (III), Ce (III), Ce (IV), Zn (II) and Bi (III) and mixtures thereof.
  • a detergent composition of the invention generally contains no more than 0.2%, preferably no more than 0.1%, more preferably no more than 0.01% and most preferably 0% (by weight based on the total weight of the composition) of oxidising agents selected from halogen-based bleaches (e.g. alkali metal hypochlorites and alkali metal salts of di- and tri-chloro and di- and tri-bromo cyanuric acids), oxygen-based bleaches (e.g. sodium perborate (tetra-or monohydrate), sodium percarbonate and hydrogen peroxide) and mixtures thereof.
  • halogen-based bleaches e.g. alkali metal hypochlorites and alkali metal salts of di- and tri-chloro and di- and tri-bromo cyanuric acids
  • oxygen-based bleaches e.g. sodium perborate (tetra-or monohydrate), sodium percarbonate and hydrogen peroxide
  • the detergent composition of the invention may be packaged as unit doses in polymeric film soluble in the wash water.
  • the detergent composition of the invention may be supplied in multidose plastics packs with a top or bottom closure.
  • a dosing measure may be supplied with the pack either as a part of the cap or as an integrated system.
  • a method for the non-oxidative laundering of fabric stains using a detergent composition according to the invention comprises diluting a dose of the detergent composition to obtain a wash liquor and washing the stained fabric with the wash liquor so formed.
  • the method may suitably be carried out in a top-loading or front-loading automatic washing machine or can be carried out by hand.
  • the dose of detergent composition is typically put into a dispenser and from there it is flushed into the machine by the water flowing into the 5 machines, thereby forming the wash liquor.
  • Dosages for a typical front-loading washing machine (using 10 to 15 litres of water to form the wash liquor) may range from about 10 ml to about 100 ml, preferably about 15 to 75 ml.
  • Dosages for a typical top-loading washing machine (using from 40 to 60 litres of water to form the wash liquor) may be higher, e.g. 100 ml or more.
  • Lower dosages of detergent e.g. 50 ml or less) may be 10 used for hand washing methods (using about 1 to 10 litres of water to form the wash liquor).
  • a subsequent aqueous rinse step and drying the laundry is preferred. Any input of water during any optional rinsing step(s) is not included when determining the volume of the wash liquor. Laundry drying can take place either in an automatic dryer or in the open air.
  • Liquid laundry detergent formulations were prepared by sequential mixing of the ingredients as shown in Table 1.
  • compositions according to the invention are indicated by a number; and comparative examples (not according to the invention) are indicated by a letter.
  • Table 1 Ingredient wt.% (active ingredient) Formulation Example A B C D 1 2 3 4 5 6 Glycerol 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 Alcohol ethoxylate 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 LAS acid 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 TEA 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 Lauric acid 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 SLES 1 EO 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4
  • the formulations were evaluated for their cleaning performance at 30°C using a Heraeus 12-pot Linitester to mimic the mechanical action of a front-loading automatic washing machine.
  • Hard model wash water (a) was prepared by dissolving 0.235g calcium chloride dihydrate and 0.163g magnesium chloride hexahydrate into 1 litre of demineralised water to give 24° FH hardness and a 2:1 calcium to magnesium ratio.
  • Hard, transition metal doped model wash water (b) was prepared by first dissolving 5.18 g of ammonium iron (III) sulphate dodecahydrate, 1.298 g of copper (II) sulphate pentahydrate, 3.034 g of zinc sulphate heptahydrate and 0.111 g manganese sulphate monohydrate in 0.5 litres of demineralized water, then acidifying the solution to pH 1.0 by dropwise addition of concentrated sulfuric acid. 2.5 ml of the acidified solution was then added to 3 litres of hard model wash water (a), immediately prior to use.
  • Test wash liquors were prepared by diluting 2.9 g of the selected test formulation in 1 litre of hard, transition metal doped water (b), and dosing a 100 ml aliquot of the test wash liquor into the Linitest pot. 2.0 cm x 2.0 cm swatches of black tea stained cotton and 20 cm x 20 cm swatches of unstained cotton ballast were placed into each Linitest pot. The pots were sealed and attached to the Linitester cradle and rotated at 40 rpm for 30 minutes at 30°C.
  • the swatches were then removed from the pots and wrung out by hand to drain residual test wash liquor.
  • the Linitest pots were rinsed and 100 ml of water was added.
  • the swatches were returned to the pots and rinsed for 5 minutes.
  • the swatches were then removed, wrung out and the rinse water drained and replaced with fresh water before returning the swatches to the pot and carrying out a second 5-minute rinse.
  • the swatches were placed on laboratory paper towel and allowed to air dry in the open laboratory.
  • SRI Stain Removal Index
  • Examples 1 to 6 according to the invention (with 1-hydroxy-1,1-bisphosphonates of formula (I)) provide equivalent or superior performance on the black tea and red wine stains compared to the comparative examples B to D (with Dequest®2010). This enables the phosphorus content in the formulation to be reduced without impairing stain removal performance.

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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)
EP18205047.6A 2018-11-07 2018-11-07 Compositions détergentes Withdrawn EP3650526A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3892676A (en) * 1965-09-07 1975-07-01 Plains Chemical Dev Co Detergent compositions containing methane diphosphonic acid compounds
US4912791A (en) * 1987-11-07 1990-04-03 Basf Aktiengesellschaft Pretreatment of textile materials: alkaline scour or bleach with organo-phosphorus compound
JPH04331297A (ja) * 1991-05-01 1992-11-19 Kao Corp 漂白剤組成物
JPH04342799A (ja) * 1991-05-20 1992-11-30 Kao Corp 漂白剤及び漂白洗浄剤組成物

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3892676A (en) * 1965-09-07 1975-07-01 Plains Chemical Dev Co Detergent compositions containing methane diphosphonic acid compounds
US4912791A (en) * 1987-11-07 1990-04-03 Basf Aktiengesellschaft Pretreatment of textile materials: alkaline scour or bleach with organo-phosphorus compound
JPH04331297A (ja) * 1991-05-01 1992-11-19 Kao Corp 漂白剤組成物
JPH04342799A (ja) * 1991-05-20 1992-11-30 Kao Corp 漂白剤及び漂白洗浄剤組成物

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