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
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/0005—Other compounding ingredients characterised by their effect
  • C11D3/0026—Low foaming or foam regulating compositions
• • 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
  • C11D1/04—Carboxylic acids or salts thereof
  • C11D1/06—Ether- or thioether carboxylic acids
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/38—Products with no well-defined composition, e.g. natural products
  • C11D3/386—Preparations containing enzymes, e.g. protease or amylase
  • C11D3/38627—Preparations containing enzymes, e.g. protease or amylase containing lipase

Definitions

• the present invention relates to the use of alkyl ether carboxylic acid in combination with lipase in a detergent composition for suppressing foaming. Moreover, the invention relates to a method for reducing foaming during the rinsing stage.
• Water is becoming a more and more scarcely available commodity, especially in developing countries, where it is not unusual that people have to walk many kilometres to arrive at a water source.
• Laundering fabrics, dishwashing and other household cleaning processes consumes large amounts of water. These are daily chores in which the use of water and a detergent cannot be avoided.
• One way of saving water is to reuse the water and another way is to reduce the amount of water being consumed for various household activities.
• Foam profile is important for laundry detergents, especially those designed for hand washing fabrics, where the appropriate volume and speed of foam formation, retention in the wash and disappearance over one or more rinse cycles are considered key benchmarks of performance by the consumers.
• High foam is especially desirable during hand washing of fabrics, since the consumer can directly feel and touch the foam generated during the wash cycle and intuitively correlates the high foam volume with effective fabric cleaning.
• silicone oil Being hydrophobic and water immiscible, such silicones are conventionally provided by the manufacturer in the form of a silicone/silica emulsion. However, this may lead to a problem with regard to the stability of the resulting mixture when trying to incorporate such emulsified antifoams into an aqueous liquid detergent formulation. Additionally, silicone is non-biodegradable and are environmentally less preferred.
• Some detergent composition may include a delayed-release amino-silicone based anti-foaming agent that is absorbed onto a carrier or filler to act in the rinsing cycle to reduce or eliminate foam, preferably after two rinse cycles.
• Such delayed-release amino-silicone are generally cost-prohibitive for most hand-washing consumers.
• the foam control benefit imparted by such amino silicone based anti-foaming agent may come at the expense of wash foam, i.e., the wash foam volume can be significantly reduced since the silicone release timing is difficult to control. Inopportune release of the silicone antifoam may lead to significant reduction of wash foam volume, which will give consumer the impression that the detergent composition contains lower surfactant level and is therefore of lower quality or value.
• the detergent compositions also include a builder.
• the builder is generally a carbonate-based builder as phosphate builders are associated with environmental concerns.
• Alkyl ether carboxylic acid and enzymes are known to deliver effective stain removal benefits in detergent compositions.
• WO2016/180552 A1 (Unilever) which is a detergent composition having 5 wt.% to 50 wt.% surfactant, 0.5 wt.% to 20 wt.% alkyl ether carboxylic acid having C 16 to C 26 carbon chain and protease for providing enhanced stain removal.
• WO2017/055205 A1 discloses a phosphate free carbonate-built powder detergent formulation having anionic surfactant, alkyl ether carboxylic acid with saturated alkyl chain, protease to effectively remove stains in carbonate build powder detergent formulations having a high fraction of anionic surfactant relative to non-ionic surfactant.
• the composition includes an alkyl ether carboxylic acid with C 12 saturated alkyl chain along with lipase and protease.
• alkyl ether carboxylic acid or a salt thereof in combination with lipase in a detergent composition for treating textile article soiled with sebum from human skin significantly reducing the foam during the rinse cycle while maintaining comparable foam volume during the main wash cycle of the laundering process. It is further found that the use of alkyl ether carboxylic acid or a salt thereof in combination with lipase in a detergent composition for treating textile article soiled with sebum stain from human skin enhances the consumer experience, by reducing the effort required during rinse especially for those consumers who hand wash their fabrics.
• the present invention relates to use of an alkyl ether carboxylic acid or salt thereof in combination with a lipase in a detergent composition for treating textile article stained with sebum from human skin to provide antifoaming benefits.
• a detergent composition for treating textile article stained with sebum from human skin to reduce the number of rinses at rinse stage.
• a method of treating textile article stained with sebum from human skin wherein the treatment of the textile article with a detergent composition comprising an alkyl ether carboxylic acid or salt thereof in combination with a lipase results in improving the antifoaming effect upon rinse.
• foam indicates a non-equilibrium dispersion of gas bubbles in a relatively smaller volume of a liquid.
• suds can be used interchangeably within the meaning of the present invention.
• foam profile refers to the properties of a detergent composition relating to foam character during the wash and rinse cycles.
• the foam profile of a detergent composition includes, but is not limited to, the speed of foam generation upon dissolution in the laundering liquor, the volume and retention of foam in the wash cycle, and the volume and disappearance of foam in the rinse cycle.
• the foam profile includes the wash foam height and rinse foam height as specifically defined by the testing methods disclosed hereinafter in the examples. It may further include additional foam-related parameters, such as foam stability measured during the washing cycle and the like.
• detergent composition includes granular, powder, liquids, tablets, bars or gel composition.
• detergent composition is a laundry detergent composition.
• an alkyl ether carboxylic acid or a salt thereof in combination with a lipase in a laundry detergent composition for treating textile article soiled with sebum from human skin, to provide antifoaming benefits.
• the sebum is preferably from adult human skin.
• the textile article soiled with sebum from human skin treated using the detergent composition of the present invention has been previously worn and subsequently washed at least 5 times, more preferably at least 10 times, still preferably at least 15 times.
• the first aspect of the present invention discloses the use of an alkyl ether carboxylic acid or a salt thereof in combination with a lipase in a laundry detergent composition for treating textile article soiled with sebum from human skin, to provide antifoaming benefits, at the rinse stage.
• Antifoaming benefits means the suppression of the foam during the rinse stage of laundering textile article with a detergent composition, especially a laundry detergent composition and where the composition retains its ability to provide satisfactory foam profile during the washing or the pre-rinse stage, but which requires lesser than the usual number of rinse cycles for the foam to subside.
• alkyl ether carboxylic acid are not included as anionic surfactants.
• the percentage weight of alkyl ether carboxylic acid is calculated as the protonated form, R-(OCH 2 CH 2 ) n -OCH 2 COOH. They may be used as salt version for example sodium salt, or amine salt.
• the alkyl ether carboxylic acid of the present invention is preferably of the following structure (I) R-(OCH 2 CH 2 ) n -OCH 2 -COOH......................... (I)
• the R group in the alkyl ether carboxylic acid is preferably a C 16 to C 20 linear or branched saturated carbon chain.
• the R group is preferably a C 16 , C 18 or C 20 linear or branched saturated carbon chain. More preferably the R group is a C 16 or C 18 linear or branched saturated carbon chain or mixtures thereof.
• the R group in the alkyl ether carboxylic acid is preferably a C 16 to C 20 linear or branched mono-unsaturated carbon chain.
• the R group is preferably a C 16 , C 18 or C 20 linear or branched mono-saturated carbon chain. More preferably the R group is a C 16 or C 18 linear monounsaturated carbon chain or a mixture thereof.
• the alkyl chain may be linear or branched, preferably it is linear.
• the alkyl chain may be saturated or mono-unsaturated, preferably unsaturated.
• the alkyl chain is preferably aliphatic and linear and may be selected from: CH 3 (CH 2 ) 15 ; CH 3 (CH 2 ) 16 ; CH 3 (CH 2 ) 17 ; CH 3 (CH 2 ) 18 ; and CH 3 (CH 2 ) 19 .
• the alkyl chain is preferably selected from CH 3 (CH 2 ) 15 ; CH 3 (CH 2 ) 17 or mixtures thereof.
• the alkyl ether carboxylic acid is most preferably of the structure selected from CH 3 (CH 2 ) 15 (OCH 2 CH 2 ) 20 OCH 2 COOH, CH 3 (CH 2 ) 17 (OCH 2 CH 2 ) 20 OCH 2 COOH or a mixture thereof.
• the alkyl chain may contain one double bond, the double bond may be cis or trans, preferably the double bond is a cis-double bond.
• the alkyl ether carboxylic acid has R group selected from C 16 monounsaturated linear carbon chain, C 18 monounsaturated linear carbon chain or mixtures thereof.
• alkyl chain is selected from oleic, elaidic, palmitic, stearic and mixtures thereof.
• n represents the molar number average of ethoxy groups.
• the value of n is preferably selected from 10 to 30 when the R group is a saturated carbon chain and when R is mono-unsaturated, n is preferably selected from 5 to 20, preferably from 8 to 20, still preferably from 9 to 20, further preferably from 10 to 20.
• the alkyl ether carboxylic acid when saturated is most preferably selected from a CH 3 (CH 2 ) 15 (OCH 2 CH 2 ) 20 OCH 2 COOH, CH 3 (CH 2 ) 17 (OCH 2 CH 2 ) 20 OCH 2 COOH or mixture thereof.
• alkyl ether carboxylic acid with C 16 to C 18 linear or branched mono-unsaturated carbon chain or a salt thereof, this is because said alkyl ether carboxylic acid has a matching chain length to the fats present in sebum which contains considerable amounts of C 16 and C 18 mono unsaturated alkyl chains for example sapeienic acid (C16:1).
• alkyl ether carboxylic acid are available from Kao (Akypo®), Sassol (Marlowet®), Huntsman (Empicol®), and Clariant (Emulsogen®).
• the alkyl ether carboxylic acid or a salt thereof is preferably added to the slurry before granulation of the detergent powder. Alternatively, it may be separately granulated and post dosed or sprayed onto the finished powder.
• the alkyl ether carboxylic acid or a salt thereof is preferably pre-mixed with another surfactant before dosing and mixing into the detergent composition.
• the detergent composition according to the present invention comprises from 0.2 wt.% to 20 wt.% alkyl ether carboxylic acid preferably having a structure represented by the general structure (I) or a salt thereof.
• the detergent composition comprises at least 0.3 wt.% alkyl ether carboxylic acid based on the weight of the detergent composition, still preferably at least 0.5 wt.%, still preferably at least 0.8 wt.%, most preferably at least 1 wt.%, but typically not more than 8 wt.%, still preferably not more than 6 wt.%, more preferably not more than 5 wt.% and most preferably not more than 4 wt.% alkyl ether carboxylic acid or a salt thereof in the detergent composition.
• the first aspect of the present invention discloses the use of a lipase enzyme in a detergent composition according to the present invention for treating textile article soiled with sebum from human for providing antifoaming benefits.
• Lipase (also known as esterase) is an enzyme which catalyses hydrolysis of ester bonds of edible fats and oils, i.e. triglycerides, into free fatty acids, mono- and diglycerides and glycerol. It is believed that the primary function of lipase is to reduce build-up of sebum. The use of lipase is of special interest for low temperature washes as then oils and fats are in the solid state and therefore more difficult to remove. It is also believed that the action of lipase is not manifested during the main-wash, but in between washes. It is believed that first the lipase gets adsorbed on top of soil during main-wash, but its action is inhibited by surfactants.
• lipase During the rinse stage, lipase remains adsorbed and degrades the soil matrix. Lipase is also suitable for detergent compositions that contain higher amount of anionic surfactants, typically 20 to 40 wt%. Lipase is also believed to remove difficult stains like tomato oil, pasta sauce, pesto, motor oil, colourless oils like olive oil and corn oil. It is believed that lipase continues its action during the drying stage forming fatty acids, diglycerides and monoglycerides.
• Cleaning lipases are discussed in Enzymes in Detergency edited by Jan H. Van Ee, Onno Misset and Erik J. Baas (1997 Marcel Dekker, New York ). Cleaning lipases are preferably active at alkaline pH in the range 7 to 11, most preferably they have maximum activity in the pH range 8 to 10.5.
• the lipase may be selected from lipase enzymes in E.C. class 3.1, 3.2 or a combination thereof.
• the cleaning lipases selected is a Triacylglycerol lipases (E.C. 3.1.1.3).
• Suitable triacylglycerol lipases can be selected from variants of the Humicola lanuginosa (Thermomyces lanuginosus) lipase.
• Other suitable triacylglycerol lipases can be selected from variants of Pseudomonas lipases, e.g., from P. alcaligenes or P. pseudoalcaligenes ( EP 218 272 ), P. cepacia ( EP 331 376 ), P. stutzeri ( GB 1,372,034 ), P. fluorescens, Pseudomonas sp.
• strain SD 705 ( WO 95/06720 and WO 96/27002 ), P. wisconsinensis 25 ( WO 96/12012 ), Bacillus lipases, e.g., from B. subtilis ( Dartois et al. (1993),Biochemica et Biophysica Acta, 1131,253-360 ), B.stearothermophilus ( JP 64/744992 ) or B. pumilus ( WO 91/16422 ).
• EC 3.1.1.3 lipases include those described in WIPO publications WO 00/60063 , WO 99/42566 , WO 02/062973 , WO 97/04078 , WO 97/04079 and US 5,869,438 .
• Preferred lipases are produced by Absidia reflexa, Absidia corymbefera, Rhizmucor miehei, Rhizopus deleman Aspergillus niger, Aspergillus tubigensis, Fusajum oxysporum, Fusarium heterosporum, Aspergillus oryzea, Penicilium camembertii, Aspergillus foetidus, Aspergillus niger, Thermomyces lanoginosus (synonym: Humicola lanuginosa) and Landerina penisapora, particularly Thermomyces lanoginosus.
• Certain preferred lipases are supplied by Novozymes and includes those under the tradenames of Lipolase®, Lipolase Ultra®, Lipoprime®, Lipoclean® and Lipex® (registered tradenames of Novozymes) and LIPASE P "AMANO®” available from Areario Pharmaceutical Co. Ltd., Nagoya, Japan, AMANO-CES®, commercially available from Toyo Jozo Co., Tagata, Japan; and further Chromobacter viscosum lipases from Amersham Pharmacia Biotech., Piscataway, New Jersey, U.S.A. and Diosynth Co., Netherlands, and other lipases such as Pseudomonas gladioli.
• LIPEX® is particularly preferred, and LIPEX® 100 TB is further particularly preferred.
• compositions include lipase having 5 to 20000 LU/g.
• commercial lipases are always coated with an inert material. Therefore, commercial lipases that are used for detergent powders, bars and tablets are in granular form containing very low amount of active lipase and balance of adjunct materials.
• the granulates contain lipase concentrate, inorganic
• suitable lipases include the "first cycle lipases" described in WO 00/60063 and U.S. Patent 6,939,702 BI, preferably a variant of SEQ ID No. 2, more preferably a variant of SEQ ID No. 2 having at least 90% homology to SEQ ID No.
• lipases can be used in combination (any mixture of lipases can be used). Suitable lipases can be purchased from Novozymes, Bagsvaerd, Denmark; Areario Pharmaceutical Co. Ltd., Nagoya, Japan; Toyo Jozo Co., Tagata, Japan; Amersham Pharmacia Biotech., Piscataway, New Jersey, U.S.A; Diosynth Co., Oss, Netherlands and/or made in accordance with the examples contained herein.
• Lipase with reduced potential for odour generation and a good relative performance are particularly preferred, as described in WO2007/087243 . These include lipoclean® (Novozyme).
• the detergent composition according to the present invention comprises from 0.0001 wt.% to 0.1 wt.% of pure enzyme of lipase.
• the detergent composition comprises at least 0.0005 wt.%, still preferably at least 0.001 wt.%, still preferably at least 0.002 wt.%, most preferably at least 0.005 wt.%, but typically not more than 0.05 wt.%, still preferably not more than 0.03 wt.%, most preferably not more than 0.01 wt.%.
• the detergent composition according to the present invention used for treating a textile article soiled with sebum from human skin is preferably a non-phosphate laundry detergent composition, i.e., contains less than 4 wt.% of phosphate.
• the term 'phosphate' includes diphosphate, triphosphate, and phosphonate species.
• the detergent composition is a laundry detergent composition.
• the laundry detergent composition is a powder formulation they are predominantly carbonate built, i.e. the weight% of sodium carbonate is greater than the weight % sum of other builder ingredient present, preferably the weight% level of other builder materials is less than 30%, more preferably less than 15 wt% of the weight% level of sodium carbonate.
• Powders should preferably give an in-use pH of from 9.5 to 11.
• the detergent composition may be a liquid laundry detergent composition or a solid laundry detergent composition.
• the detergent composition is a liquid laundry detergent composition it has a pH from 5 to 11, preferably from pH 6.5 to 8.5, most preferably from pH 6.5 to 8.
• the detergent composition is a solid laundry detergent composition it has a pH from 5 to 11, preferably from pH 8.0 to 10.5, most preferably from pH 9.5 to 10.5.
• Composition according to the present invention preferably comprises a detersive surfactant selected from anionic, amphoteric, zwitterionic, cationic, nonionic surfactant or mixtures thereof.
• the detergent composition preferably comprises an anionic charged surfactant (which includes a mixture of the same).
• the composition comprises from 4 wt.% to 50 wt.% detersive surfactants, preferably from 5 wt.% to 50 wt.%, more preferably from 7 wt.% to 30 wt.% detersive surfactant by weight of the detergent composition.
• the formulation may contain non-ionic surfactant, preferably the weight fraction of non-ionic surfactant to anionic surfactant is from 0 to 0.3, preferably 0 to 0.1.
• Suitable anionic detergent compounds which may be used are usually water-soluble alkali metal salts of organic sulphates and sulphonates having alkyl radicals containing from about 8 to about 22 carbon atoms, the term alkyl being used to include the alkyl portion of higher alkyl radicals.
• suitable synthetic anionic detergent compounds are sodium and potassium alkyl sulphates, especially those obtained by sulphating higher C 8 to C 18 alcohols, produced for example from tallow or coconut oil, sodium and potassium alkyl C 9 to C 20 benzene sulphonates, particularly sodium linear secondary alkyl C 10 to C 15 benzene sulphonates; and sodium alkyl glyceryl ether sulphates, especially those ethers of the higher alcohols derived from tallow or coconut oil and synthetic alcohols derived from petroleum.
• the anionic surfactant is preferably selected from: linear alkyl benzene sulphonate (LAS); alkyl sulphates; alkyl ether sulphates; soaps; alkyl (preferably methyl) ester sulphonates, and mixtures thereof.
• LAS linear alkyl benzene sulphonate
• alkyl sulphates alkyl ether sulphates
• soaps alkyl (preferably methyl) ester sulphonates, and mixtures thereof.
• the most preferred anionic surfactants are selected from: linear alkyl benzene sulphonate; alkyl sulphates; alkyl ether sulphates and mixtures thereof.
• the alkyl ether sulphate is a C 12 to C 14 n-alkyl ether sulphate with an average of 1 to 3EO (ethoxylate) units.
• Sodium lauryl ether sulphate is particularly preferred (SLES).
• the linear alkyl benzene sulphonate is a sodium C 11 to C 15 alkyl benzene sulphonates.
• the alkyl sulphates are a linear or branched sodium C 12 to C 18 alkyl sulphates.
• Sodium dodecyl sulphate is particularly preferred, (SDS, also known as primary alkyl sulphate).
• the anionic surfactant is selected from LAS, SLES or mixtures thereof.
• the amount of anionic surfactant in the detergent composition is preferably from 4 wt.% to 50 wt.%, more preferably from 5 wt.% to 20 wt.%. It is preferable in the composition that LAS is the dominant anionic surfactant present. In a carbonate-built powder detergent composition, it is preferable in the composition that LAS is the dominant anionic surfactant present, preferably more than 90wt% of the anionic surfactant is LAS.
• non-ionic detergent compounds which may be used include, in particular, the reaction products of compounds having an aliphatic hydrophobic group and a reactive hydrogen atom, for example, aliphatic alcohols, acids or amides, especially ethylene oxide either alone or with propylene oxide.
• Preferred non-ionic detergent compounds are the condensation products of aliphatic C 8 to C 18 primary or secondary linear or branched alcohols with ethylene oxide.
• the non-ionic detergent compound is the alkyl ethoxylated non-ionic surfactant is a C 8 to C 18 primary alcohol with an average ethoxylation of 7EO to 9EO units.
• the surfactants used are saturated.
• the detergent composition according to the present invention includes a laundry benefit ingredient selected from the group consisting of but not limited to shading dye, further enzymes, an antiredeposition polymer, a dye transfer inhibiting polymer, builder, optical brightener, sequestrant, sunscreen, soil release polymer or combinations thereof.
• the detergent composition according to the present invention preferably includes 5 wt.% to 40 wt.% sodium carbonate.
• the detergent composition includes from 0 wt.% to 4 wt.% phosphate builders.
• builder materials may be selected from 1) calcium sequestrant materials, 2) precipitating materials, 3) calcium ion-exchange materials and 4) mixtures thereof.
• calcium sequestrant builder materials include alkali metal polyphosphates , such as sodium tripolyphosphate and organic sequestrants, such as ethylene diamine tetra-acetic acid.
• precipitating builder materials examples include sodium orthophosphate and sodium carbonate.
• Examples of calcium ion-exchange builder materials include the various types of water insoluble crystalline or amorphous aluminosilicates, of which zeolites are the best known representatives, e.g. zeolite A, zeolite B (also known as zeolite P), zeolite C, zeolite X, zeolite Y and also the zeolite P-type as described in EP-A-0, 384,070 .
• the detergent composition comprises from 0 wt.% to 8 wt.% of zeolite builder.
• the composition may also contain 0 wt.% to 65 wt.% of a builder or complexing agent such as ethylenediaminetetraacetic acid, diethylenetriamine-penta acetic acid, alkyl- or alkenyl succinic acid, nitrilotriacetic acid or the other builders mentioned below.
• a builder or complexing agent such as ethylenediaminetetraacetic acid, diethylenetriamine-penta acetic acid, alkyl- or alkenyl succinic acid, nitrilotriacetic acid or the other builders mentioned below.
• Many builders are also bleach-stabilising agents by virtue of their ability to complex metal ions.
• Zeolite and carbonate are preferred builders for powder detergent compositions.
• the composition may contain as builder a crystalline aluminosilicate, preferably an alkali metal aluminosilicate, more preferably a sodium aluminosilicate. This is typically present at a level of less than 5 wt.%.
• Aluminosilicates are materials having the general formula: 0.8-1.5 M 2 O.Al 2 O 3 . 0.8-6 SiO 2 where M is a monovalent cation, preferably sodium. These materials contain some bound water and are required to have a calcium ion exchange capacity of at least 50 mg CaO/g.
• the preferred sodium aluminosilicates contain 1.5-3.5 SiO 2 units in the formula above. They can be prepared readily by reaction between sodium silicate and sodium aluminate, as amply described in the literature.
• the detergent composition includes 0 wt.% to 8 wt.% sodium silicates.
• Detergent composition according to the present invention includes from 5 wt.% to 45 wt.% inorganic salt selected from the group consisting of alkali metal salt of chlorides, alkali metal carbonates or mixtures thereof.
• the inorganic salts present in the detergent composition includes but is not limited to sodium chloride, sodium carbonate, calcium carbonate or mixtures thereof.
• the detergent composition according to the present invention may preferably include antifoam also known as a suds suppressing material.
• Suitable antifoam materials are preferably in granular form for use in powder composition, such as those described in EP 266863A (Unilever).
• antifoam materials may be selected from silicone oil, petroleum jelly, hydrophobic silica and fatty acids, more preferably silicone oil and fatty acids.
• Antifoam may be present in an amount up to 5% by weight of the composition.
• the detergent composition according to the present invention includes from 0 wt.% to 5 wt.% antifoam, preferably 0.5 wt/% to 5 wt.%. Preferably no antifoam is required in the composition of the present invention.
• the detergent composition may preferably comprise a fluorescent agent (optical brightener).
• fluorescent agents are well known, and many such fluorescent agents are available commercially. Usually, these fluorescent agents are supplied and used in the form of their alkali metal salts, for example, the sodium salts.
• the total amount of the fluorescent agent or agents used in the composition is generally from 0.005 wt.% to 2 wt.%, more preferably 0.01 wt.% to 0.1 wt.%.
• Preferred classes of fluorescer are Di-styryl biphenyl compounds, e.g. Tinopal (TradeMark) CBS-X, Di-amine stilbene di-sulphonic acid compounds, e.g. Tinopal DMS pure Xtra and Blankophor (Trade Mark) HRH, and Pyrazoline compounds, e.g. Blankophor SN.
• Di-styryl biphenyl compounds e.g. Tinopal (TradeMark) CBS-X
• Di-amine stilbene di-sulphonic acid compounds e.g. Tinopal DMS pure Xtra and Blankophor (Trade Mark) HRH
• Pyrazoline compounds e.g. Blankophor SN.
• Preferred fluorescers are: sodium 2 (4-styryl-3-sulfophenyl)-2H-napthol[1, 2-d]triazole, disodium 4,4'- bis([(4-anilino-6-(N methyl-N-2 hydroxyethyl) amino 1,3,5-triazin-2-yl)]amino)stilbene-2-2' disulfonate, disodium 4,4'-bis([(4-anilino-6-morpholino-1, 3,5-triazin-2-yl)]amino) stilbene-2-2' disulfonate, and disodium 4,4'-bis(2-sulfostyryl)biphenyl.
• the composition comprises a perfume.
• perfumes are provided in the CTFA (Cosmetic, Toiletry and Fragrance Association) 1992 International Buyers Guide, published by CFTA Publications and OPD 1993 Chemicals Buyers Directory 80th Annual Edition, published by Schnell Publishing Co .
• compositions of the present invention it is envisaged that there will be four or more, preferably five or more, more preferably six or more or even seven or more different perfume components.
• top notes are defined by Poucher (Journal of the Society of Cosmetic Chemists 6(2):80 [1955 ]).
• Preferred top-notes are selected from citrus oils, linalool, linalyl acetate, lavender, dihydromyrcenol, rose oxide and cis-3-hexanol.
• the perfume materials include free perfume, perfume microcapsules or combinations thereof. As is known in the art, free perfumes and perfume microcapsules provide the consumer with perfume hits at different points during the wash cycle. It is particularly preferred that the compositions of the present invention comprise a combination of both free perfume and perfume microcapsules.
• compositions of the present invention comprise 0.001 wt.% to 10 wt.% perfume materials, more preferably 0.1 wt.% to 5 wt.% perfume materials, most preferably 0.1 wt.% to 3 wt.% perfume materials.
• Useful perfume components may include materials of both natural and synthetic origin. They include single compounds and mixtures. Specific examples of such components may be found in the current literature, e.g., in Fenaroli's Handbook of Flavor Ingredients, 1975, CRC Press ; Synthetic Food Adjuncts, 1947 by M. B. Jacobs, edited by Van Nostr and; or Perfume and Flavor Chemicals by S. Arctander 1969, Montclair, N.J. (USA ). These substances are well known to the person skilled in the art of perfuming, flavouring, and/or aromatizing consumer products.
• compositions of the present invention preferably comprise 0.05 wt.% to 10 wt.%, more preferably 0.1 wt.% to 8 wt.%, most preferably 0.1 wt.% to 5 wt.% free perfume.
• Particularly preferred perfume components are blooming perfume components and substantive perfume components.
• Blooming perfume components are defined by a boiling point less than 250°C and a LogP or greater than 2.5.
• Substantive perfume components are defined by a boiling point greater than 250°C and a LogP greater than 2.5. Boiling point is measured at standard pressure (760 mm Hg).
• a perfume composition will comprise a mixture of blooming and substantive perfume components.
• the perfume composition may comprise other perfume components.
• perfume components it is commonplace for a plurality of perfume components to be present in a free oil perfume composition.
• compositions for use in the present invention it is envisaged that there will be three or more, preferably four or more, more preferably five or more, most preferably six or more different perfume components.
• An upper limit of 300 perfume components may be applied.
• compositions of the present invention preferably comprise 0.05 wt.% to 10 wt.%, more preferably 0.1 wt.% to 8 wt.%, even more preferably 0.1 wt.% to 5 wt.% perfume microcapsules and most preferably 0.05 wt.% to 4 wt. % perfume microcapsules.
• the weight of microcapsules is of the material as supplied.
• suitable encapsulating materials may comprise, but are not limited to; aminoplasts, proteins, polyurethanes, polyacrylates, polymethacrylates, polysaccharides, polyamides, polyolefins, gums, silicones, lipids, modified cellulose, polyphosphate, polystyrene, polyesters or combinations thereof.
• Particularly preferred materials are aminoplast microcapsules, such as melamine formaldehyde or urea formaldehyde microcapsules.
• Perfume microcapsules of the present invention can be friable microcapsules and/or moisture activated microcapsules.
• friable it is meant that the perfume microcapsule will rupture when a force is exerted.
• moisture activated it is meant that the perfume is released in the presence of water.
• the compositions of the present invention preferably comprise friable microcapsules. Moisture activated microcapsules may additionally be present. Examples of microcapsules which can be friable include aminoplast microcapsules.
• Perfume components contained in a microcapsule may comprise odiferous materials and/or pro-fragrance materials.
• Particularly preferred perfume components contained in a microcapsule are blooming perfume components and substantive perfume components.
• Blooming perfume components are defined by a boiling point less than 250°C and a LogP greater than 2.5.
• Substantive perfume components are defined by a boiling point greater than 250°C and a LogP greater than 2.5. Boiling point is measured at standard pressure (760 mm Hg).
• a perfume composition will comprise a mixture of blooming and substantive perfume components.
• the perfume composition may comprise other perfume components.
• perfume components it is commonplace for a plurality of perfume components to be present in a microcapsule.
• compositions for use in the present invention it is envisaged that there will be three or more, preferably four or more, more preferably five or more, most preferably six or more different perfume components in a microcapsule.
• An upper limit of 300 perfume components may be applied.
• the microcapsules may comprise perfume components and a carrier for the perfume ingredients, such as zeolites or cyclodextrins.
• the composition may comprise one or more further polymers.
• suitable polymers are carboxymethylcellulose, poly (ethylene glycol), poly(vinyl alcohol), polycarboxylates such as polyacrylates, maleic/acrylic acid copolymers and lauryl methacrylate/acrylic acid copolymers.
• One or more further enzymes are preferably present in the detergent composition of the invention.
• each further enzyme in the laundry composition of the invention is from 0.0001 wt.% to 0.1 wt.% protein.
• the further enzyme is preferably selected from: amylases, mannanases, proteases; and, cellulases, most preferably amylases and proteases.
• Any enzyme present in the composition may be stabilized using conventional stabilizing agents, e.g., a polyol such as propylene glycol or glycerol, a sugar or sugar alcohol, lactic acid, boric acid, or a boric acid derivative, e.g., an aromatic borate ester, or a phenyl boronic acid derivative such as 4-formylphenyl boronic acid, and the composition may be formulated as described in e.g. WO 92/19709 and WO 92/19708 .
• a polyol such as propylene glycol or glycerol
• a sugar or sugar alcohol lactic acid, boric acid, or a boric acid derivative, e.g., an aromatic borate ester, or a phenyl boronic acid derivative such as 4-formylphenyl boronic acid
• Shading dyes are preferably present in the detergent composition at a level from 0.002 wt.% to 0.2 wt.%.
• Dyes are described in Color Chemistry Synthesis, Properties and Applications of Organic Dyes and Pigments, (H Zollinger, Wiley VCH, Zurich, 2003 ) and, Industrial Dyes Chemistry, Properties Applications. (K Hunger (ed), Wiley-VCH Weinheim 2003 ).
• Shading dyes for use in laundry detergents preferably have an extinction coefficient at the maximum absorption in the visible range (400nm to 700nm) of greater than 5000 L mol "cm", preferably greater than 10000 L mol "cm".
• the dyes are blue or violet in colour.
• Preferred shading dye chromophores are azo, azine, anthraquinone, and triphenylmethane.
• Azo, anthraquinone, phthalocyanine and triphenylmethane dyes preferably carry a net anionic charged or are uncharged.
• Azine preferably carry a net anionic or cationic charge.
• Blue or violet shading dyes deposit to fabric during the wash or rinse step of the washing process providing a visible hue to the fabric.
• the dye gives a blue or violet colour to a white cloth with a hue angle of 240 to 345, more preferably 250 to 320, most preferably 250 to 280.
• the white cloth used in this test is bleached non-mercerised woven cotton sheeting.
• Shading dyes are discussed in WO2005/003274 , WO2006/032327 (Unilever), WO 2006/032397 (Unilever), WO2006/045275 (Unilever), WO06/027086 (Unilever), WO 2008/017570 (Unilever), WO 2008/141880 (Unilever), WO2009/132870 (Unilever), WO 2009/141173 (Unilever), WO 2010/099997 (Unilever), WO 2010/102861 (Unilever), WO 2010/148624 (Unilever), WO2008/087497 (P&G), WO2011/011799 (P&G), WO2012/054820 (P&G), WO2013/142495 (P&G), and WO2013/151970 (P&G).
• Mono-azo dyes preferably contain a heterocyclic ring and are most preferably thiophene dyes.
• Alkoxylated thiophene dyes are discussed in WO/2013/142495 and WO/2008/087497 . Preferred examples of thiophene dyes are shown below: and,
• Bis-azo dyes are preferably sulphonated bis-azo dyes.
• Preferred examples of sulphonated bis-azo compounds are direct violet 7, direct violet 9, direct violet 11, direct violet 26, direct violet 31, direct violet 35, direct violet 40, direct violet 41, direct violet 51, Direct Violet 66, direct violet 99 and alkoxylated versions thereof. Alkoxylated bis-azo dyes are discussed in WO2012/054058 and WO2010/151906 .
• alkoxylated bis-azo dye is:
• Azine dye are preferably selected from sulphonated phenazine dyes and cationic phenazine dyes. Preferred examples are acid blue 98, acid violet 50, dye with CAS-No 72749-80-5 , acid blue 59, and the phenazine dye selected from wherein:
• the shading dye is present in the composition in range from 0.0001 wt.% to 0.5 wt.%, preferably 0.001 wt.% to 0.1 wt.%. Depending upon the nature of the shading dye there are preferred ranges depending upon the efficacy of the shading dye which is dependent on class and particular efficacy within any particular class. As stated above the shading dye is a blue or violet shading dye. A mixture of shading dyes may be used.
• the dyes are listed according to Colour Index (Society of Dyers and Colourists /American Association of Textile Chemists and Colorists) classification.
• the carbonate-built powder detergent formulations are present in 0.5 Kg to 5 Kg packs.
• the present invention provides use of an alkyl ether carboxylic acid or a salt thereof in combination with a lipase in a detergent composition for treating textile article soiled with sebum from human skin, to reduce the number of rinses.
• the number of rinses at the rinse stage of the laundering process is reduces to 3 or less, more preferably 2 or less or still preferably a single rinse.
• a third aspect of the present invention disclosed is a method for suppressing the foam at the rinse stage during a washing cycle, the method comprising the steps of:
• the method according to the third aspect reduces the foaming at the rinse stage during laundering such that the rinsing stage involves less than 3 rinses, preferably less than 2 rinses and most preferably involves a single rinse step.
• the inventors of the present invention discovered surprisingly and unexpectedly that the use of a combination of specific alkyl ester carboxylic acid and lipase in the detergent composition for treating fabric soiled with sebum from human skin has a significant impact in suppressing the foam at the rinse stage.

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• 2019
  • 2019-06-12 EP EP19179594.7A patent/EP3750979A1/de not_active Withdrawn

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