WO2021223552A1 - Composition de détergent à lessive liquide - Google Patents

Composition de détergent à lessive liquide Download PDF

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Publication number
WO2021223552A1
WO2021223552A1 PCT/CN2021/084871 CN2021084871W WO2021223552A1 WO 2021223552 A1 WO2021223552 A1 WO 2021223552A1 CN 2021084871 W CN2021084871 W CN 2021084871W WO 2021223552 A1 WO2021223552 A1 WO 2021223552A1
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WIPO (PCT)
Prior art keywords
laundry detergent
liquid laundry
detergent composition
linear
alkyl
Prior art date
Application number
PCT/CN2021/084871
Other languages
English (en)
Inventor
Haiyan Huang
Yijia CAO
Jiayao LU
Original Assignee
The Procter & Gamble Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by The Procter & Gamble Company filed Critical The Procter & Gamble Company
Priority to JP2022536600A priority Critical patent/JP2023506052A/ja
Priority to CN202180007721.3A priority patent/CN114929847A/zh
Priority to EP21800776.3A priority patent/EP4146776A1/fr
Publication of WO2021223552A1 publication Critical patent/WO2021223552A1/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
    • C11D3/0005—Other compounding ingredients characterised by their effect
    • C11D3/0084—Antioxidants; Free-radical scavengers
    • 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
    • C11D1/66—Non-ionic compounds
    • C11D1/83—Mixtures of non-ionic with anionic 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
    • C11D3/2003—Alcohols; Phenols
    • 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
    • C11D3/2093—Esters; Carbonates
    • C11D2111/12—

Definitions

  • the present invention relates to a cleaning composition, and particularly a liquid laundry detergent composition that is useful for treating fabrics with improved malodor control benefit.
  • Laundry wash processes are designed to eliminate soils and stains from fabrics. Some soils and stains can generate malodors on fabrics. In some instances, these malodors can persist even after the laundry wash operation.
  • liquid laundry detergent compositions employ a hindered phenol antioxidant in combination with a specific surfactant system, i.e., one that contains both nonionic (NI) and anionic (AI) surfactants at a relatively high NI-to-AI weight ratio
  • a specific surfactant system i.e., one that contains both nonionic (NI) and anionic (AI) surfactants at a relatively high NI-to-AI weight ratio
  • the resulting malodor control and reduction benefit is further improved in comparison with liquid laundry detergent compositions that contain the same hindered phenol antioxidant but in a different surfactant system (e.g., with a lower NI-to-AI weight ratio) .
  • a different surfactant system e.g., with a lower NI-to-AI weight ratio
  • presence of the hindered phenol antioxidant in the liquid laundry detergent compositions of the present invention may further improve perfume release from such compositions.
  • the present invention relates to a liquid laundry detergent composition
  • a liquid laundry detergent composition comprising:
  • NI-to-AI weight ratio ranges from 1 to 20.
  • the present invention relates to a liquid laundry detergent composition
  • a liquid laundry detergent composition comprising:
  • a hindered phenol antioxidant selected from the group consisting of C 1 -C 22 linear alkyl esters of 3, 5-bis (1, 1-dimethylethyl) -4-hydroxy-benzenepropanoic acid and mixtures thereof;
  • a nonionic surfactant selected from the group consisting of C 8 -C 18 alkyl ethoxylated alcohols having a weight average degree of ethoxylation ranging from about 7 to about 10 and mixtures thereof;
  • weight ratio of NI to LAS+AES ranges from about 1.5 to about 8.
  • the present invention may also relate to the use of above-described liquid laundry detergent composition for treating fabrics.
  • the term “substantially free of” or “substantially free from” means that the indicated material is present in an amount of no more than about 5 wt%, preferably no more than about 2%, and more preferably no more than about 1 wt%.
  • the term “essentially free of” or “essentially free from” means that the indicated material is at the very minimal not deliberately added to the composition, or preferably not present at an analytically detectible level in such composition. It may include compositions in which the indicated material is present only as an impurity of one or more of the materials deliberately added to such compositions.
  • liquid refers to a fluid having a liquid having a viscosity of from about 1 to about 2000 mPa*sat 25°C and a shear rate of 20 sec- 1 .
  • the viscosity of the liquid may be in the range of from about 200 to about 1000 mPa*sat 25°C at a shear rate of 20 sec- 1 .
  • the viscosity of the liquid may be in the range of from about 200 to about 500 mPa*sat 25°C at a shear rate of 20 sec- 1 .
  • molecular weight refers to the weight average molecular weight (MWw) of the polymer chains in a polymer composition, which may be calculated using the equation:
  • Ni is the number of molecules having a molecular weight Mi.
  • alkyl as used herein means a hydrocarbyl moiety which can be linear or branched, substituted or unsubstituted.
  • hydrocarbyl is defined herein as any organic unit or moiety which is comprised of carbon atoms and hydrogen atoms. Included with the definition of “hydrocarbyl” are the aromatic (aryl) and non-aromatic carbocyclic rings.Further included within the term hydrocarbyl are heterocycles. The term “heterocycle” includes both aromatic (heteroaryl) and non-aromatic heterocyclic rings.
  • test methods that are disclosed in the Test Methods Section of the present application must be used to determine the respective values of the parameters of Applicants’ inventions are described and claimed herein.
  • the liquid laundry detergent composition of the present invention contains at least one hindered phenol antioxidant, preferably in an amount sufficient to provide at least 25 ppb, more preferably at least 100 ppb, even more preferably at least 250 ppb, even more preferably at least 500 ppb, most preferably at least 1000 ppb, of an antioxidant concentration in the treatment liquor.
  • hindered phenol antioxidants may help to improve malodor control performance of the liquid laundry detergent compositions, particularly in combination with a surfactant system with a relatively high content of nonionic surfactants according to the present disclosure.
  • hindered phenol is used to refer to a compound comprising a phenol group with substituent (s) at a position ortho to at least one phenolic -OH group.
  • the hindered phenol antioxidant used in the present invention comprises at least one phenolic -OH group having: (a) at least one C 3 -C 22 branched alkyl at a position ortho to said at least one phenolic -OH group; or (b) substitutes at each position ortho to said at least one phenolic -OH group, wherein said substitutes are independently selected from the group consisting of hydroxy, C 1 -C 6 alkoxy, C 1 -C 22 linear alkyl, and combinations thereof.
  • hindered phenol antioxidants may include, but are not limited to: 2, 6-bis (1-methylpropyl) phenol; 2, 6-bis (1, 1-dimethylethyl) -4-methyl-phenol (also known as hydroxy butylated toluene or “BHT” ) ; 2- (1, 1-dimethylethyl) -1, 4-benzenediol; 2, 4-bis (1, 1-dimethylethyl) -phenol; 2, 6-bis (1, 1-dimethylethyl) -phenol; 3, 5-bis (1, 1-dimethylethyl) -4-hydroxybenzene propanoic acid, methyl ester; 2- (1, 1-dimethylethyl) -4-methylphenol; 2- (1, 1-dimethylethyl) -4, 6-dimethyl-phenol; 3, 5-bis (1, 1-dimethylethyl) -4-hydroxybenzenepropanoic acid, 1, 1'- [2, 2-bis [ [3- [3, 5-bis (1, 1-dimethylpropy
  • Additional antioxidants may be employed.
  • suitable additional antioxidants for use include, but are not limited to, the group consisting of ⁇ -, ⁇ -, ⁇ -, ⁇ -tocopherol, ethoxyquin, 2, 2, 4-trimethyl-1, 2-dihydroquinoline, 2, 6-di-tert-butyl hydroquinone, tert-butyl hydroxyanisole, lignosulphonic acid and salts thereof, and mixtures thereof.
  • ethoxyquin (1, 2-dihydro-6-ethoxy-2, 2, 4-trimethylquinoline) is marketed under the name Raluquin TM by the company Raschig TM .
  • antioxidants that may be used in the composition are 6-hydroxy-2, 5, 7, 8-tetramethylchroman-2-carboxylic acid (Trolox TM ) and 1, 2-benzisothiazoline-3-one (Proxel GXL TM ) .
  • Antioxidants such as tocopherol sorbate, butylated hydroxyl benzoic acids and their salts, gallic acid and its alkyl esters, uric acid and its salts, sorbic acid and its salts, and dihydroxyfumaric acid and its salts may also be useful.
  • Other useful antioxidants may include tannins, such as tannins selected from the group consisting of gallotannins, ellagitannins, complex tannins, condensed tannins, and combinations thereof.
  • the hindered phenol antioxidant comprises at least one phenolic -OH group having at least one C 3 -C 6 branched alkyl at a position ortho to said at least one phenolic -OH group.
  • the hindered phenol antioxidant may be 2, 6-bis (1, 1-dimethylethyl) -4-methyl-phenol (BHT) .
  • the hindered phenol antioxidant is an ester of 3, 5-bis (1, 1-dimethylethyl) -4-hydroxy-benzenepropanoic acid, and most preferably a C 1 -C 22 linear alkyl ester of 3, 5-bis (1, 1-dimethylethyl) -4-hydroxy-benzenepropanoic acid.
  • C 1 -C 22 linear alkyl esters of 3, 5-bis (1, 1-dimethylethyl) -4-hydroxy-benzenepropanoic acid include from Raschig USA (Texas, USA) , which is a methyl ester of 3, 5-bis (1, 1-dimethylethyl) -4-hydroxy-benzenepropanoic acid, and TS from BASF (Ludwigshafen, Germany) , which is an octadecyl ester of 3, 5-bis (1, 1-dimethylethyl) -4-hydroxy-benzenepropanoic acid.
  • the hindered phenol antioxidants may also help to reduce yellowing that may be associated with amines, allowing the amines to be formulated at a relatively higher level. In this respect, it is desirable to use non-yellowing hindered phenol antioxidants, may be preferred. Antioxidants that form yellow by-products are undesirable because they may lead to perceptible negative attributes in the consumer experience (such as deposition of yellow by-products on fabric, for example) . The skilled artisan is able to make informed decisions regarding the selection of antioxidants to employ. Further,
  • the above-described hindered phenol antioxidant may be present in the liquid laundry detergent composition of the present invention in an amount ranging from about 0.001 wt%to about 5 wt%, preferably from about 0.005 wt%to about 2 wt%, more preferably from about 0.01 wt%to about 1 wt%, most preferably from about 0.02 wt%to about 0.5 wt%.
  • the liquid laundry detergent composition contains from about 0.02 wt%to about 0.5 wt%of a C 1 -C 22 linear alkyl ester of 3, 5-bis (1, 1-dimethylethyl) -4-hydroxy-benzenepropanoic acid.
  • the liquid laundry detergent composition of the present invention also includes a surfactant system comprising one or more surfactants selected from the group consisting of anionic surfactants, nonionic surfactants, zwitterionic surfactants, amphoteric surfactants, cationic surfactants, and combinations thereof.
  • the total surfactant content of such liquid laundry detergent composition may range from about 10%to about 90%, preferably from about 10%to about 80%, more preferably from about 15%to about 60%by total weight of the composition.
  • the surfactant system of the liquid laundry detergent composition comprises both nonionic (NI) and anionic (AI) surfactants at a specific NI-to-AI weight ratio ranging from about 1 to about 20, preferably from about 1.1 to about 15, more preferably from about 1.2 to about 10, most preferably from about 1.5 to about 8.
  • the total amount of NI and AI surfactants in the liquid laundry detergent composition may range from about 6 wt%to about 90 wt%, preferably from about 10 wt%to about 80 wt%, more preferably from about 12 wt%to about 60 wt%.
  • Nonionic surfactants that can be included into the liquid laundry detergent composition of the present invention may be any conventional nonionic surfactants, including but not limited to: alkyl alkoxylated alcohols, alkyl alkoxylated phenols, alkyl polysaccharides, polyhydroxy fatty acid amides, and the like.
  • Preferred nonionic surfactants are those of the formula R 1 (OC 2 H 4 ) n OH, wherein R 1 is a C 8 -C 18 alkyl group or alkyl phenyl group, and n is from about 1 to about 80.
  • C 8 -C 18 alkyl ethoxylated alcohols having a weight average degree of ethoxylation from about 1 to about 20, preferably from about 5 to about 15, more preferably from about 7 to about 10, such as nonionic surfactants commercially available from Shell.
  • nonionic surfactants useful herein include: C 6 -C 12 alkyl phenol alkoxylates where the alkoxylate units may be ethyleneoxy units, propyleneoxy units, or a mixture thereof; C 12 -C 18 alcohol and C 6 -C 12 alkyl phenol condensates with ethylene oxide/propylene oxide block polymers such as from BASF; C 14 -C 22 mid-chain branched alcohols (BA) ; C 14 -C 22 mid-chain branched alkyl alkoxylates, BAE x, wherein x is from 1 to 30; alkyl polysaccharides, specifically alkyl polyglycosides; Polyhydroxy fatty acid amides; and ether capped poly (oxyalkylated) alcohol surfactants. Suitable nonionic surfactants also include those sold under the tradename from BASF.
  • the nonionic surfactants can be provided in the liquid laundry detergent compositions of the present invention at levels ranging from about 5 wt%to about 60 wt%, preferably from about 8 wt%to about 50 wt%, more preferably from about 9 wt%to about 45 wt%, most preferably from about 10 wt%to about 40 wt%.
  • the liquid laundry detergent composition contains from about 10 wt%to about 40 wt%of a C 8 -C 18 alkyl ethoxylated alcohol having a weight average degree of ethoxylation ranging from about 7 to about 10.
  • Anionic surfactants that are used in the liquid laundry detergent compositions of the present invention are preferably non-soap synthetic anionic surfactants, such as the water-soluble salts, preferably the alkali metal salts and/or ammonium salts, of organic sulphonic reaction products having in their molecular structure an alkyl group (included in the term "alkyl” is the alkyl portion of acyl groups) containing from about 10 to about 20 carbon atoms and a sulphonic/phosphonic acid or sulfuric/phosphoric acid ester group.
  • non-soap synthetic anionic surfactants such as the water-soluble salts, preferably the alkali metal salts and/or ammonium salts, of organic sulphonic reaction products having in their molecular structure an alkyl group (included in the term "alkyl” is the alkyl portion of acyl groups) containing from about 10 to about 20 carbon atoms and a sulphonic/phosphonic acid or sulfuric/phospho
  • Suitable synthetic anionic surfactants include, but are not limited to: C 10 -C 20 linear alkyl benzene sulphonates, C 10 -C 20 linear or branched alkyl sulfates, C 10 -C 20 linear or branched alkylethoxy sulfates having a weight average degree of ethoxylation ranging from 0.1 to 5.0, C 10 -C 20 linear or branched alkyl ester sulfates, C 10 -C 20 linear or branched alkyl sulphonates, C 10 -C 20 linear or branched alkyl ester sulphonates, C 10 -C 20 linear or branched alkyl phosphates, C 10 -C 20 linear or branched alkyl phosphonates, C 10 -C 20 linear or branched alkyl carboxylates, and combinations thereof (including their sodium, potassium, and/or ammonium salts) .
  • anionic surfactants containing C 10 -C 20 linear alkyl benzene sulphonates (LAS) and C 10 -C 20 linear or branched alkylethoxy sulfates (AES) having a weight average degree of ethoxylation ranging from about 0.1 to about 5, preferably from about 0.5 to about 4, more preferably from about 1 to about 3.
  • the liquid laundry detergent composition comprises both the LAS and AES.
  • the anionic surfactants can be provided in the liquid laundry detergent compositions of the present invention at levels ranging from about 1 wt%to about 45 wt%, more preferably from about 2 wt%to about 30 wt%, more preferably from about 3 wt%to about 25 wt%, and most preferably from about 5 wt%to about 20 wt%.
  • the liquid laundry detergent composition contains from about 5 wt%to about 20 wt%of LAS and AES, while the AES has a weight average degree of ethoxylation ranging from about 1 to about 3.
  • the weight ratio between LAS and AES preferably ranges from 1: 2 to 8: 1, preferably from 1: 1 to 5: 1, more preferably from 1.5: 1 to 4: 1. Most preferably, the NI-to- (LAS+AES) weight ratio ranges from about 1.5 to about 8.
  • surfactants useful herein include amphoteric surfactants, zwitterionic surfactants and cationic surfactants. Such surfactants are well known for use in laundry detergents and are typically present at levels from about 0.1 wt%, 0.2 wt%or 0.5 wt%to about 5 wt%, 10 wt%or 20 wt%.
  • the liquid laundry detergent composition further contains from about 0.2 wt%to about 10 wt%of one or more amphoteric and/or zwitterionic surfactants.
  • Preferred amphoteric surfactants are selected from the group consisting of amine oxide surfactants, such as, for example, alkyl dimethyl amine oxide or alkyl amido propyl dimethyl amine oxide, more preferably alkyl dimethyl amine oxide and especially coco dimethyl amino oxide.
  • Amine oxide may have a linear or mid-branched alkyl moiety.
  • Typical linear amine oxides are characterized by a formula R 1 –N (R 2 ) (R 3 ) -O, wherein R 1 is a C 8-18 alkyl, and wherein R 2 and R 3 are independently selected from the group consisting of C 1-3 alkyls and C 1-3 hydroxyalkyls, such as methyl, ethyl, propyl, isopropyl, 2-hydroxethyl, 2-hydroxypropyl and 3-hydroxypropyl.
  • “mid-branched” means that the amine oxide has one alkyl moiety having n1 carbon atoms with one alkyl branch on the alkyl moiety having n2 carbon atoms.
  • the alkyl branch is located on the ⁇ carbon from the nitrogen on the alkyl moiety.
  • This type of branching for the amine oxide is also known in the art as an internal amine oxide.
  • the total sum of n1 and n2 is from about 10 to about 24 carbon atoms, preferably from about 12 to about 20, and more preferably from about 10 to about 16.
  • the number of carbon atoms for the one alkyl moiety (n1) should be approximately the same number of carbon atoms as the one alkyl branch (n2) such that the one alkyl moiety and the one alkyl branch are symmetric.
  • symmetric means that
  • Particularly preferred amphoteric surfactants are C 10 -C 14 alkyl dimethyl amine oxides.
  • Preferred zwitterionic surfactants are betaine surfactants, such as, for example, alkyl betaines, alkylamidobetaines, amidazoliniumbetaines, sulfobetaines (also referred to as sultaines) as well as phosphobetaines.
  • a particularly preferred betaine is cocoamidopropylbetaine.
  • Water-soluble salts of the higher fatty acids are also useful anionic surfactants in the liquid laundry detergent compositions of the present invention, although such soaps are not counted when calculating the NI-to-AI weight ratio in the present invention.
  • Suitable soaps include alkali metal salts (such as the sodium, potassium, ammonium, and alkyl ammonium salts) of higher fatty acids containing from about 8 to about 24 carbon atoms, and preferably from about 12 to about 18 carbon atoms. Soaps can be made by direct saponification of fats and oils or by the neutralization of free fatty acids.
  • the liquid laundry detergent compositions of the present invention preferably contain soaps at a relatively low level, e.g., no more than about 6 wt%, more preferably not more than about 2 wt%or 1 wt%, and most preferably said liquid laundry detergent compositions are substantially or essentially free of soaps.
  • the liquid laundry detergent composition of the present invention is suitable for fabric cleaning application, including automatic machine washing or hand-washing of fabrics, or cleaning auxiliaries, such as for example, bleach, rinse aids, additives or pre-treat types.
  • the liquid laundry detergent composition can be a fully formulated laundry detergent product.
  • Liquid compositions contained in encapsulated and/or unitized dose products are included, as are compositions which comprise two or more separate but jointly dispensable portions.
  • the liquid laundry detergent composition contains water as an aqueous carrier, and it can contain either water alone or mixtures of organic solvent (s) with water as carrier (s) .
  • Suitable organic solvents are linear or branched lower C 1 -C 8 alcohols, diols, glycerols or glycols; lower amine solvents such as C 1 -C 4 alkanolamines, and mixtures thereof.
  • Exemplary organic solvents include 1, 2-propanediol, ethanol, glycerol, monoethanolamine and triethanolamine.
  • the carriers are typically present at levels in the range of from about 0.1%to about 98%, preferably from about 10%to about 95%, more preferably from about 25%to about 75%by total weight of the liquid laundry detergent composition.
  • water is from about 85 to about 100 wt%of the carrier. In other embodiments, water is absent and the composition is anhydrous.
  • Highly preferred compositions afforded by the present invention are clear, isotropic liquids.
  • the liquid laundry detergent composition of the present invention has a viscosity from about 1 to about 2000 centipoise (1-2000 mPa ⁇ s) , or from about 200 to about 800 centipoises (200-800 mPa ⁇ s) .
  • the viscosity can be determined using a Brookfield viscometer, No. 2 spindle, at 60 RPM/s, measured at 25°C.
  • the liquid laundry detergent composition of the present invention is preferably characterized by a pH value of no more than 9, preferably no more than 8.7, more preferably no more than 8.5. Such pH value is measured by using the liquid laundry detergent composition as a neat (i.e., undiluted) product. If the pH value of the liquid laundry detergent composition is too high, the hindered phenol antioxidant may become destabilized to yield yellow by-products that may result in undesirable color shift of the composition.
  • liquid laundry compositions of the present invention may comprise an external structurant, which may be present in an amount ranging from about 0.001%to about 1.0%, preferably from about 0.05%to about 0.5%, more preferably from about 0.1%to about 0.3%by total weight of the composition.
  • an external structurant for the practice of the present invention is hydrogenated castor oil, which is also referred to as trihydroxylstearin and is commercially available under the tradename
  • adjunct ingredients for laundry detergent products include: builders, chelating agents, dye transfer inhibiting agents, dispersants, rheology modifiers, enzymes, and enzyme stabilizers, catalytic materials, bleach activators, hydrogen peroxide, sources of hydrogen peroxide, preformed peracids, polymeric dispersing agents, clay soil removal/anti-redeposition agents, brighteners, suds suppressors, dyes, photobleaches, structure elasticizing agents, fabric softeners, carriers, hydrotropes, processing aids, solvents, hueing agents, anti-microbial agents, perfumes (including neat perfume oils and/or perfume microcapsules) , and/or pigments.
  • the precise nature of these adjunct ingredients and the levels thereof in the liquid laundry detergent composition will depend on factors like the specific type of the composition and the nature of the
  • the liquid laundry detergent composition of the present invention may be formed by any suitable process.
  • it can be formed by mixing the above-mentioned ingredients simultaneously or sequentially.
  • the hindered phenol antioxidant is added as a part of an emulsified pre-mixture that is formed by mixing the hindered phenol antioxidant with an emulsifier.
  • the present invention in one aspect is directed to a method of using the above-described liquid laundry detergent composition for treating fabrics, the method comprising the steps of: (i) providing a liquid laundry detergent composition as described above; (ii) forming a laundry liquor by diluting the liquid laundry detergent composition with water; (iii) washing fabric in the laundry liquor; and (iv) rinsing the fabric in water.
  • Machine laundry methods may comprise treating soiled fabrics with an aqueous wash solution in a top-loading or front-loading automatic or semi-automatic washing machine having dissolved or dispensed therein an effective amount of a liquid laundry cleaning composition in accord with the invention.
  • An “effective amount” of the liquid laundry detergent composition means from about 10g to about 300g of product dissolved or dispersed in a wash solution of volume from about 5L to about 65L.
  • the water temperatures may range from about 5°C to about 100°C.
  • the water to soiled fabric ratio may be from about 1: 1 to about 30: 1.
  • the liquid laundry detergent compositions may be employed at concentrations of from about 200 ppm to about 15,000 ppm in solution.
  • the detergent dosage levels may also vary depending not only on the type and severity of the soils and stains, but also on the wash water temperature, the volume of wash water, and the type of washing machine (e.g., top-loading, front-loading, vertical-axis Japanese-type automatic washing machine) .
  • the liquid laundry detergent compositions herein may be used for laundering of fabrics at reduced wash temperatures. These methods of laundering fabric comprise the steps of delivering a liquid laundry detergent composition to water to form a wash liquor and adding a laundering fabric to said wash liquor, wherein the wash liquor has a temperature of from about 0°C to about 20°C, or from about 0°C to about 15°C, or from about 0°C to about 9°C.
  • the fabric may be contacted to the water prior to, or after, or simultaneous with, contacting the liquid laundry detergent composition with water.
  • Hand washing/soak methods and combined handwashing with semi-automatic washing machines, are also included.
  • a sensory panel consists of at least 5 panelists.
  • the panel must wear safety glasses, lab coat, and disposal gloves.
  • Panel’s nose must not directly touch on test fabrics during evaluation.
  • the panelists must follow appropriate rules to avoid nose saturation and keep good quality of evaluation.
  • Test fabric is 100%cotton terry towel with size 30cm x 30cm.
  • the test fabric will be checked to make sure there are not any stains and are new towels before the test. Then the fabric will be washed as stripping operation to remove starch from towel.
  • the stripping washing test have two steps: the first step is washed by powder detergent (without micro encapsulate perfume detergent) at 40°C test condition and rinse three times, then the second step is to wash by water at 40°C and rinse three times.
  • ABS malodor cocktail &Artificial body soil
  • Malodor cocktail is prepared by dissolving the malodorants in ethanol (CAS#: 64-17-, 5) with following composition.
  • Artificial body soil (ABS) is commercially available by Accurate Product Development; 2028 Bohlke Blvd, Fairfield, OH 45014. The operation should be done in Fume hood.
  • test towel fabric is cut into 4 parts evenly (1/4) for test pieces. Soak the towel in tap water and remove the exceed water by spin dried with washing machine for 3min.
  • test piece (1/4 size fabric) apply 5ml of the mixture solution (0.15%Malodor soil solution) on the front of test piece and apply 5ml on the back of test piece by pipette.
  • ballast malodor spiked towel (whole size fabric) , apply 20ml of the mixture solution (0.15%Malodor soil solution) on the front and 20ml on the back. Wrap the test pieces by aluminum sheet and seal it by folding the edge of aluminum sheet (test piece x 4 wrapped together) . Tap the test pieces wrapped by aluminum sheet for 5mins.
  • test fabric pieces (1/4 cut towel) is used to wash by detergent and assess the malodor reduction/removal effect.
  • 3 test fabric pieces (1/4 size x 3) is for malodor evaluation and 3 whole size towel applied malodor solution for ballast, other balanced by clean T-shirt to 3kg.
  • 15 test fabric pieces (1/4 size x 15) for malodor evaluation and balanced by clean T-shirt to 3kg.
  • the washing test is conducted in washing machine with standard test condition.
  • a reference laundry detergent is also included in the above processes.
  • the reference can be one of the laundry detergents to be tested.
  • the malodor scores for the samples vs. the reference are determined by the panel according to the sensory scale (9 points scale) below:
  • Test fabrics are evaluated by at least 5 qualified DoD panelists. 3 replicates in each pair (3 sets of pair from the different fabric) , it is possible to evaluate each pair by up to 3 panelists. After the first panelist completes the evaluation, 2nd panelist starts the evaluation. All test fabrics are kept in the plastic bag tightly until the 2nd panelist completes the evaluation. Panelists must complete the evaluation within 20 min. If they cannot complete the evaluation of all pairs within 20 min, they need rest at least 20 minutes and then evaluate the rest of pairs. There are three time points to evaluate the fabric: after wash which is within 1 ⁇ 2 hours after wash, after dry which is within the next day after wash, re-wet which is within the same day as after dry evaluation and within 1-2hours after spray water on test fabrics. Re-wet means water application on dried test fabric and it simulates wipe wet hand on towel.
  • the following method is used to test the malodor reduction benefits of a composition.
  • Fatty acids and malodor markers are added into 100 ml glass gar with Teflon-lined cap according to Table C and mixed well using a vortex.
  • Body Soil Malodor Composition is then prepared by adding the specified amount of each material according to Table D into a 200 mL glass jar with Teflon lined cap.
  • Artificial body soil (ABS) is commercially available by Accurate Product Development; 2028 Bohlke Boulevard, Fairfield, OH 45014.
  • sixteen (16) malodor test fabrics per wash load are prepared by applying 300 ⁇ l of Body soil malodor composition described in Table D to de-sized 2X5 inch white polycotton 50/50 (PCW50/50) swatches.
  • About 51 grams of each liquid laundry detergent to be tested (see, e.g., Example 2, Table 3) is added to Japan National top loading automatic washing machine set to Normal cycle; 68 °F wash cycle followed by a 68 °F rinse cycle.
  • Cincinnati, OH, USA soft water is mixed with hard water at known ratio to meet hardness target -This is done automatically by mixing station equipment installed on washing machines and coded algorithm.
  • Malodor test fabrics are washed in 3gpg wash water with 2.7 kg, 50 X 50 cm clean cotton and poly-cotton ballast then dried in a Maytag tumble drier set to low for 20 minutes. The dried fabrics are placed in a mylar bag and sealed for 24 hours.
  • Fabrics are cut into uniform 2 inch by 2.5 inch pieces and placed in 10 mL headspace crimp vials. Vials are equilibrated greater than 12 hours before analysis.
  • the following settings are used in the auto sampler: 80 C incubation temperature, 90 min incubation time, VT32-10 sample tray type, 22 mm vial penetration, 20 min extraction time, 54mm injection penetration and 300 s desorption time.
  • the following settings are used for the Front Split/Splitless inlet helium: split mode, 250 C temperature, 12 psi pressure, 79.5 mL/min total flow, 3 mL/min septum purge flow, 50: 1 split ratio and 22.5 min GC run time.
  • the %Malodor Reduction Oxidation Products is provided as a percentage comparing the reduction of the amount of selected malodor markers as provided by the test composition compared to the (nil-antioxidant) reference composition. The value is determined as follows:
  • Markerstest Total ABS/Squalene Markers (nmoles/L) of the fabrics washed with the formulation with the tested antioxidant
  • compositions and processes of the present disclosure may provide a %Malodor Reduction Oxidation Products value of at least about 10%, or at least about 20%, or at least about 30%, or at least about 40%, or at least about 50%, or at least about 60%, or at least about 70%, or at least about 80%.
  • Malodor reduction may also be reported as the difference between Markersref and Markerstest, thereby showing an absolute difference (e.g., Delta ABS/Squalene Oxidation) .
  • Perfume total intensity in fabric headspace are assayed using SPME (Solid Phase Micro Extraction) sampling technique and Gas Chromatography-Mass Spectrometry (GC-MS) using Agilent Technologies Gas Chromatograph 7890B system equipped with Agilent Technologies 5977B Mass Selective Detector & J&W TM DB-5ms Ultra Inert Column (30 m length x 0.25 mm internal diameter x 0.25 ⁇ m film thickness) . Fabric is cut into 5 ⁇ 8 cm and slide into 20 mL headspace vial. After three presses with 2 kg weight, the headspace vials are conditioned in air on bench for 1hour and immediately sealed before analysis.
  • SPME Solid Phase Micro Extraction
  • GC-MS Gas Chromatography-Mass Spectrometry
  • the following settings are used in the Multipurpose Auto Sampler MPS (GERSTEL) : 65°C incubation temperature, 15min incubation time, VT15-20-CVM sample tray type, 2cm Gray-Notched SPME fiber coated with DVB/CAR/PDMS (Supelco 57299-U) , 30mm vial penetration, 5min extraction time, 43mm injection penetration and 180s desorption time.
  • the following setting was used for Front Split/Splitless inlet helium: splitless mode, heat at 270°C, 12.9psi pressure, 1.6mL/min flow.
  • the following setting was used for oven: 40°C initial temperature and 0.5 min hold time, 17°C/min heating program, 270°C and 1min hold time.
  • MSD Full Scan mode with range of 35 to 300 m/z.
  • Example 1 Improved Malodor Reduction Benefit of Antioxidant-Containing Liquid Laundry Detergent Compositions
  • liquid laundry detergent compositions A-D are provided, all of which contain about 22.0 wt%of surfactants including both a NI surfactant and two AI surfactants (LAS and AES) .
  • Composition A and C contain about 0.075 wt%of a hindered phenol antioxidant while Compositions B and C do not contain such antioxidant.
  • the NI-to-AI weight ratios in these liquid laundry detergent compositions are different, in which such ratio in Compositions A and B is about 1.5 and such ratio in Compositions C and D is about 0.5.
  • the addition of the hindered phenol antioxidant can deliver an improved malodor reduction effect at different NI-to-AI ratios, i.e. Composition A with the hindered phenol antioxidant is better than Composition B without the hindered phenol antioxidant and Composition C with the hindered phenol antioxidant is better than Composition D without the hindered phenol antioxidant. More surprisingly, the malodor reduction effect is further improved under high NI background (i.e. at a relatively high NI-to-AI weight ratio) , because Composition A with NI-to-AI weight ratio being 1.5 is better than Composition C with NI-to-AI weight ratio being 0.5 and adding Ralox results in a greater malodor reduction under high NI background (i.e.
  • Example 2 Comparative Examples Exhibiting Impact of Different NI-to-AI Weight Ratios on Malodor Reduction Benefit of Antioxidant-Containing Liquid Laundry Detergent Compositions
  • liquid laundry detergent compositions E-K are provided, all of which contain about 0.075 wt%of a hindered phenol antioxidant and about 22.0 wt%of surfactants including both a NI surfactant and two AI surfactants (LAS and AES) .
  • the NI-to-AI weight ratios in these liquid laundry detergent compositions vary from about 0.5 to about 5, e.g., at about 0.5, 0.8, 1, 1.2, 1.5, 2 and 5.
  • liquid detergent compositions E-K are tested for their %Malodor Reduction Oxidation Products value (i.e., reduction vs. control compositions that contain the same ingredients but without the hindered phenol antioxidant) according to Test Method B disclosed hereinabove.
  • Example 3 Exemplary Liquid Laundry Detergent Compositions
  • Liquid laundry detergent compositions 1-6 are made by mixing together the ingredients listed in the proportions shown:

Abstract

L'invention concerne un détergent à lessive liquide ayant une meilleure capacité de lutte contre les mauvaises odeurs, qui contient d'environ 0,001 % en poids à environ 5 % en poids d'un antioxydant phénolique encombré et un système tensioactif spécifique comprenant à la fois des tensioactifs non ioniques (NI) et des tensioactifs anioniques (AI) à un rapport pondéral NI sur AI d'environ 1 à 20.
PCT/CN2021/084871 2020-05-08 2021-04-01 Composition de détergent à lessive liquide WO2021223552A1 (fr)

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WO2024050346A1 (fr) 2022-09-02 2024-03-07 Danisco Us Inc. Compositions détergentes et procédés associés
WO2024050343A1 (fr) 2022-09-02 2024-03-07 Danisco Us Inc. Variants de subtilisine et procédés associés

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WO2024050339A1 (fr) 2022-09-02 2024-03-07 Danisco Us Inc. Variants de mannanases et procédés d'utilisation
WO2024050346A1 (fr) 2022-09-02 2024-03-07 Danisco Us Inc. Compositions détergentes et procédés associés
WO2024050343A1 (fr) 2022-09-02 2024-03-07 Danisco Us Inc. Variants de subtilisine et procédés associés

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