EP3401384A1 - Liquid laundry detergent composition - Google Patents

Liquid laundry detergent composition Download PDF

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Publication number
EP3401384A1
EP3401384A1 EP17170422.4A EP17170422A EP3401384A1 EP 3401384 A1 EP3401384 A1 EP 3401384A1 EP 17170422 A EP17170422 A EP 17170422A EP 3401384 A1 EP3401384 A1 EP 3401384A1
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EP
European Patent Office
Prior art keywords
och
linear
surfactant
detergent composition
laundry detergent
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EP17170422.4A
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German (de)
French (fr)
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Unilever PLC
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Unilever PLC
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Priority to EP17170422.4A priority Critical patent/EP3401384A1/en
Priority to PCT/EP2018/058430 priority patent/WO2018206196A1/en
Priority to CN201880025777.XA priority patent/CN110520514B/en
Priority to EP18715655.9A priority patent/EP3622046B1/en
Priority to BR112019023389-0A priority patent/BR112019023389A2/en
Priority to ARP180101210A priority patent/AR111856A1/en
Publication of EP3401384A1 publication Critical patent/EP3401384A1/en
Priority to ZA2019/06404A priority patent/ZA201906404B/en
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • C11D1/37—Mixtures of compounds all of which are anionic
    • 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
    • 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
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
    • C11D1/22—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aromatic compounds
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66—Non-ionic compounds
    • C11D1/72—Ethers of polyoxyalkylene glycols

Definitions

  • the present invention provides a liquid laundry detergent composition.
  • it relates to a concentrated liquid laundry detergent composition for use in domestic laundry.
  • Laundry liquid formulations containing saturated long chain alkyl ether carboxylates with high degrees of ethoxylation are desirable as they provide enhanced cleaning particularly of sebum soil.
  • Saturated long chain alkyl ether carboxylates with high degrees of ethoxylation are solid waxy materials at room temperature.
  • the concentrated liquid detergent is a pourable liquid, both for ease of use for the consumer when using the concentrated liquid detergent, or when the concentrated liquid detergent is further processed into a more complex liquid detergent.
  • WO 2013/087286 discloses aqueous liquids formulations containing alkyl ether carboxylic acids, betaines, anionic surfactant, non-ionic surfactant for providing softening benefits.
  • WO 2014/060235 discloses an aqueous laundry detergent composition
  • an aqueous laundry detergent composition comprising (a) nonionic surfactant, (b) anionic surfactant, (c) alkyl ether carboxylic acid or carboxylate salt thereof, and, (d) a polyglucosamine or a copolymer of glucosamine and N-acetylglucosamine; and to its use to soften fabrics.
  • the present invention provides a liquid laundry detergent composition comprising:
  • the pH of the formulation is from 0.5 to 2.0, more preferably from 0.5 to 1.5.
  • a preferred liquid laundry detergent composition comprises:
  • Water contents are measured by Karl Fischer Titration. This may be accomplished using an automated Karl Fischer titrators, available from MetroOhm, and Mettler Toledo.
  • the pH of the formulation is that of a 1 wt.% solution of the liquid laundry detergent composition dissolved in demineralised water at 293K.
  • Room temperature as used herein is defined as 293K.
  • the liquid laundry composition comprises from 50 to 80 wt.%, preferably from 55 to 80 wt.%, more preferably from 55 to 75 wt.%, most preferably from 60 to 75 wt.% of the linear alkyl benzene sulfonic acid surfactant. Weights are expressed as the protonated form (i.e. the linear alkyl benzene anionic sulfonic acid form).
  • alkali metal salt preferably sodium salt
  • triethanolamine preferably triethanolamine
  • monoethanol amine salt preferably triethanolamine
  • the sodium salt is most preferred.
  • non-neutralised acid form is used.
  • Weights are expressed as the protonated form.
  • the surfactant may be produced by a variety of different routes. Synthesis is discussed in Anionic Surfactants Organic Chemistry edited by H.W. Stache (Marcel Dekker, New York 1996).
  • Linear alkyl benzene sulfonic acid may be made by the sulfonation of linear alkyl benzene.
  • the sulfation can be carried out with concentrated sulphuric acid, oleum or sulphur trioxide.
  • Linear alkyl benzene sulfonic acid produced by reaction of linear alkyl benzene with sulphur trioxide is preferred.
  • Linear alkyl benzene may be produced by a variety of routes. Examples include: Benzene may be alkylated with n-alkenes using HF catalyst.
  • Benzene may be alkylated with n-alkenes in a fixed bed reactor with a solid acidic catalyst such as Alumosilicate (DETAL process).
  • a solid acidic catalyst such as Alumosilicate (DETAL process).
  • Benzene may be alkylated with n-alkenes using an aluminium chloride catalyst. Benzene may be alkylated with n-chloroparaffins using an aluminium chloride catalyst.
  • the liquid laundry composition comprises from 15 to 45 wt.%, preferably from 15 to 40 wt.%, more preferably from 17.5 to 40 wt.%, most preferably from 20 to 40 wt.% of the alkyl ether carboxylic acid anionic surfactant.
  • Weights of alkyl ether carboxylic acid are calculated as the protonated form, R 2 -(OCH 2 CH 2 ) n -OCH 2 COOH, where n is from 10 to 24. They may be used as salt version for example sodium salt, triethanolamine, monoethanol amine salt. The sodium salt is most preferred.
  • n may be from 10 to 24, preferably from, 10 to 20, more preferably from 15 to 20.
  • Alkyl ether carboxylic acids synthesis is discussed in Anionic Surfactants Organic Chemistry edited by H.W. Stache (Marcel Dekker, New York 1996 ). They may be synthesised via the reaction of the corresponding alcohol ethoxylate with chloroacetic acid or monochloro sodium acetate in the presence of NaOH:- R 2 -(OCH 2 CH 2 ) n -OH + NaOH + ClCH 2 COONa ⁇ R 2 -(OCH 2 CH 2 ) n -OCH 2 COOH + NaCl + H 2 O
  • R 2 -(OCH 2 CH 2 ) n -OH may be present, preferably levels of R 2 -(OCH 2 CH 2 ) n -OH are from 0 to 10 wt.% in the alkyl ether carboxylic acid. Low levels of diglycolic acid and glycolic acid may be present as bi products.
  • the alkyl ether carboxylic acid may also be synthesised via an oxidation reaction:- R 2 -(OCH 2 CH 2 ) n -O CH 2 CH 2 OH ⁇ R 2 -(OCH 2 CH 2 ) n -OCH 2 COOH
  • the oxidation is typically conducted using oxygen as the oxidant under basic conditions in the presence of metal catalyst such as Pd/Pt, as described in DE3135946 ; DE2816127 and EP0304763 .
  • the alkyl chain may be linear or branched, preferably it is linear.
  • the alkyl chain is preferably selected from CH 3 (CH 2 ) 15 and CH 3 (CH 2 ) 17
  • the alkyl ether carboxylic acid is most preferably of the structure: CH 3 (CH 2 ) 17 (OCH 2 CH 2 ) 20 OCH 2 COONa
  • Alkyl ether carboxylic acids are available from Kao (Akypo ®), Huntsman (Empicol®) and Clariant (Emulsogen ®).
  • the alkyl ether carboxylic acid is preferably used directly form the synthesis without further purification.
  • the weight ratio of linear alkyl benzene sulfonic acid surfactant to the alkyl ether carboxylic acid surfactant is preferably from 55:45 to 5:1, more preferably from 1.5:1 to 5:1.
  • the weight ratio of linear alkyl benzene sulfonic acid surfactant to the alkyl ether carboxylic acid surfactant may be from 1.5:1 to 4.5:1, for example from 1.5:1 to 4:1; or from 2:1 to 4.5:1; or 2:1 to 4:1; or even 2.5:1 to 4.25:1; or even 2.5:1 to 4:1.
  • Water may be absent from the formulation, or present at a level of less than 10 wt.%, preferably less than 9 wt.%. If water is present, then it is present preferably at a level of from 0.01 to 8 wt.%, more preferably from 0.1 to 8 wt.%, most preferably from 1 to 8 wt.%.
  • Non-ionic surfactant may be absent from the formulation, or present at a level of less than 20 wt.%, preferably less than 15 wt.%, more preferably less than 12 wt.%. If non-ionic surfactant is present, then it is present preferably at a level of from 0.1 to 20 wt.%, more preferably from 0.1 to 15 wt.%, most preferably from 0.25 to 12 wt.%.
  • the non-ionic surfactant has the following structure: R 2 -(OCH 2 CH 2 ) n -OH, wherein: R 2 is selected from saturated C 12 to C 22 linear or branched alkyl chains, preferably C 16 to C 18 linear alkyl chains, and wherein n is selected from 5 to 30, preferably 10 to 20.
  • the liquid detergent composition of the invention can be considered a concentrated liquid detergent composition. It may be used directly, or more preferably used as an ingredient to formulate further liquid detergent compositions.
  • Such further liquid detergent compositions may comprise further ingredients such as: fatty acids or salts thereof, shading dyes, enzymes (such as lipase, protease, amylase, cellulase), antiredeposition polymers, dye transfer inhibiting polymers, builders, structurants or thickening polymers, sequestrants, perfumes, and/or soil release polymers.
  • Second surfactant Phase at 293K linear alkyl benzene anionic sulfonic acid Pourable Liquid inventive Sodium lauryl ether sulfonate with 1 mole of ethoxylation Solid comparative Sodium lauryl ether sulfonate with 3 mole of ethoxylation Soft Gel comparative

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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)

Abstract

The invention relates to a liquid laundry detergent composition comprising: (i) from 50 to 80 wt.% of a linear alkyl benzene sulfonic acid surfactant; (ii) from 15 to 45 wt.% of an alkyl ether carboxylic acid surfactant of the following structure: R 1 -(OCH 2 CH 2 ) n -OCH 2 -COOH, wherein: R 1 is selected from saturated C 16 to C 22 linear or branched alkyl chains, and wherein n is selected from 10 to 24; (iii) less than 10 wt.% water; and (iv) from 0 to 20 wt.% non-ionic surfactant of the following structure: R 2 -(OCH 2 CH 2 ) n -OH, wherein: R 2 is selected from saturated C 12 to C 22 linear or branched alkyl chains, and wherein n is selected from 5 to 30; and wherein the pH of the formulation is from 0.3 to 2.0.

Description

    FIELD OF INVENTION
  • The present invention provides a liquid laundry detergent composition. In particular, it relates to a concentrated liquid laundry detergent composition for use in domestic laundry.
    • BACKGROUND OF THE INVENTION
  • Laundry liquid formulations containing saturated long chain alkyl ether carboxylates with high degrees of ethoxylation are desirable as they provide enhanced cleaning particularly of sebum soil.
  • Saturated long chain alkyl ether carboxylates with high degrees of ethoxylation are solid waxy materials at room temperature.
  • To reduce weight in transportation it is desirable to have highly concentrated liquid laundry detergent with minimal contents of water. This may be used directly for washing or further mixed with other ingredients before washing. However it is highly desirable that the concentrated liquid detergent is a pourable liquid, both for ease of use for the consumer when using the concentrated liquid detergent, or when the concentrated liquid detergent is further processed into a more complex liquid detergent.
  • Accordingly, there is need for highly concentrated laundry detergents containing high levels of saturated long chain alkyl ether carboxylates that are pourable liquids at room temperature.
  • WO 2013/087286 (Unilever) discloses aqueous liquids formulations containing alkyl ether carboxylic acids, betaines, anionic surfactant, non-ionic surfactant for providing softening benefits.
  • WO 2014/060235 (Unilever) discloses an aqueous laundry detergent composition comprising (a) nonionic surfactant, (b) anionic surfactant, (c) alkyl ether carboxylic acid or carboxylate salt thereof, and, (d) a polyglucosamine or a copolymer of glucosamine and N-acetylglucosamine; and to its use to soften fabrics.
    • SUMMARY OF THE INVENTION
  • In one aspect, the present invention provides a liquid laundry detergent composition comprising:
    1. (i) from 50 to 80 wt.% of a linear alkyl benzene sulfonic acid surfactant;
    2. (ii) from 15 to 45 wt.% of an alkyl ether carboxylic acid surfactant of the following structure:

               R1-(OCH2CH2)n-OCH2-COOH,

      wherein: R1 is selected from saturated C16 to C22 linear or branched alkyl chains, preferably C16 to C18 linear alkyl chains, and wherein n is selected from 10 to 24;
    3. (iii) less than 10 wt.% water;
    4. (iv) from 0 to 20 wt.% non-ionic surfactant of the following structure

               R2-(OCH2CH2)n-OH,

      wherein: R2 is selected from saturated C12 to C22 linear or branched alkyl chains, preferably C16 to C18 linear alkyl chains, and wherein n is selected from 5 to 30, preferably 10 to 20;
    wherein the pH of the formulation is from 0.3 to 2.0.
  • Preferably the pH of the formulation is from 0.5 to 2.0, more preferably from 0.5 to 1.5.
  • A preferred liquid laundry detergent composition comprises:
    1. (i) from 60 to 80 wt.% of a linear alkyl benzene sulfonic acid surfactant;
    2. (ii) from 20 to 40 wt.% of an alkyl ether carboxylic acid surfactant of the following structure:

               R1-(OCH2CH2)n-OCH2-COOH,

      • wherein: R1 is selected from saturated C16 to C18 linear alkyl chains,
      • and wherein n is selected from 10 to 20;
    3. (iii) less than 10 wt.% water;
    4. (iv) from 0 to 20 wt.% non-ionic surfactant of the following structure

               R2-(OCH2CH2)n-OH,

      wherein: R2 is selected from saturated C12 to C22 linear or branched alkyl chains, preferably C16 to C18 linear alkyl chains, and wherein n is selected from 10 to 20;
    wherein the pH of the formulation is from 0.5 to 2.0;
    and wherein the weight ratio of linear alkyl benzene sulfonic acid surfactant to the alkyl ether carboxylic acid surfactant is from 1.5:1 to 4:1. DETAILED DESCRIPTION OF THE INVENTION
  • Water contents are measured by Karl Fischer Titration. This may be accomplished using an automated Karl Fischer titrators, available from MetroOhm, and Mettler Toledo.
  • The pH of the formulation is that of a 1 wt.% solution of the liquid laundry detergent composition dissolved in demineralised water at 293K.
  • Room temperature as used herein is defined as 293K.
    • Linear alkyl benzene sulfonic acid surfactant
  • The liquid laundry composition comprises from 50 to 80 wt.%, preferably from 55 to 80 wt.%, more preferably from 55 to 75 wt.%, most preferably from 60 to 75 wt.% of the linear alkyl benzene sulfonic acid surfactant. Weights are expressed as the protonated form (i.e. the linear alkyl benzene anionic sulfonic acid form).
  • They may be used as salt version, for example alkali metal salt (preferably sodium salt), triethanolamine, monoethanol amine salt. The sodium salt is most preferred. Preferably the non-neutralised acid form is used.
  • Linear alkyl benzene sulfonic acid has the structure:
    Figure imgb0001
     where x + y = 7, 8, 9 or 10.
    Preferably x + y = 8 is present at a weight level greater than 28 wt.% of the total level of the linear alkyl benzene anionic surfactant.
    Preferably x + y = 9 is present at greater than 28 wt.% of the total level of the linear alkyl benzene anionic surfactant. Weights are expressed as the protonated form.
  • The surfactant may be produced by a variety of different routes. Synthesis is discussed in Anionic Surfactants Organic Chemistry edited by H.W. Stache (Marcel Dekker, New York 1996).
  • Linear alkyl benzene sulfonic acid may be made by the sulfonation of linear alkyl benzene. The sulfation can be carried out with concentrated sulphuric acid, oleum or sulphur trioxide. Linear alkyl benzene sulfonic acid produced by reaction of linear alkyl benzene with sulphur trioxide is preferred.
  • Linear alkyl benzene may be produced by a variety of routes. Examples include: Benzene may be alkylated with n-alkenes using HF catalyst.
  • Benzene may be alkylated with n-alkenes in a fixed bed reactor with a solid acidic catalyst such as Alumosilicate (DETAL process).
  • Benzene may be alkylated with n-alkenes using an aluminium chloride catalyst. Benzene may be alkylated with n-chloroparaffins using an aluminium chloride catalyst.
    • Alkyl ether carboxylic acid
  • The liquid laundry composition comprises from 15 to 45 wt.%, preferably from 15 to 40 wt.%, more preferably from 17.5 to 40 wt.%, most preferably from 20 to 40 wt.% of the alkyl ether carboxylic acid anionic surfactant.
  • Weights of alkyl ether carboxylic acid are calculated as the protonated form, R2-(OCH2CH2)n-OCH2COOH, where n is from 10 to 24. They may be used as salt version for example sodium salt, triethanolamine, monoethanol amine salt. The sodium salt is most preferred.
  • n may be from 10 to 24, preferably from, 10 to 20, more preferably from 15 to 20.
  • Alkyl ether carboxylic acids synthesis is discussed in Anionic Surfactants Organic Chemistry edited by H.W. Stache (Marcel Dekker, New York 1996). They may be synthesised via the reaction of the corresponding alcohol ethoxylate with chloroacetic acid or monochloro sodium acetate in the presence of NaOH:-

             R2-(OCH2CH2)n-OH + NaOH + ClCH2COONa → R2-(OCH2CH2)n-OCH2COOH + NaCl + H2O

  • In this synthesis residual R2-(OCH2CH2)n-OH may be present, preferably levels of R2-(OCH2CH2)n-OH are from 0 to 10 wt.% in the alkyl ether carboxylic acid. Low levels of diglycolic acid and glycolic acid may be present as bi products.
  • The alkyl ether carboxylic acid may also be synthesised via an oxidation reaction:-

             R2-(OCH2CH2)n-O CH2CH2OH → R2-(OCH2CH2)n-OCH2COOH

    The oxidation is typically conducted using oxygen as the oxidant under basic conditions in the presence of metal catalyst such as Pd/Pt, as described in DE3135946 ; DE2816127 and EP0304763 .
  • The alkyl chain may be linear or branched, preferably it is linear.
  • The alkyl chain is preferably selected from CH3(CH2)15 and CH3(CH2)17
  • The alkyl ether carboxylic acid is most preferably of the structure:

             CH3(CH2)17(OCH2CH2)20OCH2COONa

  • Alkyl ether carboxylic acids are available from Kao (Akypo ®), Huntsman (Empicol®) and Clariant (Emulsogen ®).
  • The alkyl ether carboxylic acid is preferably used directly form the synthesis without further purification.
  • It is preferred that the weight ratio of linear alkyl benzene sulfonic acid surfactant to the alkyl ether carboxylic acid surfactant is preferably from 55:45 to 5:1, more preferably from 1.5:1 to 5:1. The weight ratio of linear alkyl benzene sulfonic acid surfactant to the alkyl ether carboxylic acid surfactant may be from 1.5:1 to 4.5:1, for example from 1.5:1 to 4:1; or from 2:1 to 4.5:1; or 2:1 to 4:1; or even 2.5:1 to 4.25:1; or even 2.5:1 to 4:1.
  • Water may be absent from the formulation, or present at a level of less than 10 wt.%, preferably less than 9 wt.%. If water is present, then it is present preferably at a level of from 0.01 to 8 wt.%, more preferably from 0.1 to 8 wt.%, most preferably from 1 to 8 wt.%.
  • Non-ionic surfactant may be absent from the formulation, or present at a level of less than 20 wt.%, preferably less than 15 wt.%, more preferably less than 12 wt.%. If non-ionic surfactant is present, then it is present preferably at a level of from 0.1 to 20 wt.%, more preferably from 0.1 to 15 wt.%, most preferably from 0.25 to 12 wt.%.
  • The non-ionic surfactant has the following structure:

             R2-(OCH2CH2)n-OH,

    wherein: R2 is selected from saturated C12 to C22 linear or branched alkyl chains, preferably C16 to C18 linear alkyl chains, and wherein n is selected from 5 to 30, preferably 10 to 20.
  • The liquid detergent composition of the invention can be considered a concentrated liquid detergent composition. It may be used directly, or more preferably used as an ingredient to formulate further liquid detergent compositions.
  • Such further liquid detergent compositions may comprise further ingredients such as: fatty acids or salts thereof, shading dyes, enzymes (such as lipase, protease, amylase, cellulase), antiredeposition polymers, dye transfer inhibiting polymers, builders, structurants or thickening polymers, sequestrants, perfumes, and/or soil release polymers.
    • Experimental
  • The following mixtures containing 20 wt.% of alkyl ether carboxylate (R1 = stearyl, n = 20, used as Na salt) and 80 wt.% second surfactant were prepared at 333K. At this temperature, all ingredients were liquid. They were then cooled to 293K. The phase results are shown in the table.
    Second surfactant Phase at 293K
    linear alkyl benzene anionic sulfonic acid Pourable Liquid
    inventive
    Sodium lauryl ether sulfonate with 1 mole of ethoxylation Solid
    comparative
    Sodium lauryl ether sulfonate with 3 mole of ethoxylation Soft Gel
    comparative
    Non-ionic surfactant: alcohol ethoxylate with C13-15 and 7 moles of ethoxylation Soft Gel
    comparative
  • The experiment with was repeated with different ratios of linear alkyl benzene anionic sulfonic acid to the alkyl ether carboxylate. The results are shown in the following table, along with the entry for the previous example:-
    Wt% alkyl ether carboxylate Wt% linear alkyl benzene anionic sulfonic acid Phase at 293K
    100 0 solid
    comparative
    50 50 Soft gel
    comparative
    40 60 Pourable Liquid
    inventive
    30 70 Pourable Liquid
    inventive
    20 80 Pourable Liquid
    inventive

Claims (8)

  1. A liquid laundry detergent composition comprising:
    (i) from 50 to 80 wt.% of a linear alkyl benzene sulfonic acid surfactant;
    (ii) from 15 to 45 wt.% of an alkyl ether carboxylic acid surfactant of the following structure:

             R1-(OCH2CH2)n-OCH2-COOH,

    wherein: R1 is selected from saturated C16 to C22 linear or branched alkyl chains, preferably C16 to C18 linear alkyl chains, and wherein n is selected from 10 to 24;
    (iii) less than 10 wt.% water;
    (iv) from 0 to 20 wt.% non-ionic surfactant of the following structure

             R2-(OCH2CH2)n-OH,

    wherein: R2 is selected from saturated C12 to C22 linear or branched alkyl chains, preferably C16 to C18 linear alkyl chains, and wherein n is selected from 5 to 30, preferably 10 to 20;
    wherein the pH of the formulation is from 0.3 to 2.0.
  2. A liquid laundry detergent composition according to claim 1, wherein the pH of the formulation is from 0.5 to 2.0, preferably from 0.5 to 1.5.
  3. A liquid laundry detergent composition according to claim 1 or claim 2, wherein the non-ionic surfactant is present at a level of from 0.1 to 20 wt.%, preferably from 0.1 to 15 wt.%, more preferably from 0.25 to 12 wt.%.
  4. A liquid laundry detergent composition according to any preceding claim, wherein the composition comprises from 55 to 80 wt.%, preferably from 55 to 75 wt.%, more preferably from 60 to 75 wt.% of the linear alkyl benzene sulfonic acid surfactant.
  5. A liquid laundry detergent composition according to any preceding claim, wherein the composition comprises from 15 to 40 wt.%, preferably from 17.5 to 40 wt.%, more preferably from 20 to 35 wt.% of the alkyl ether carboxylic acid anionic surfactant.
  6. A liquid laundry detergent composition according to any preceding claim, wherein the weight ratio of linear alkyl benzene sulfonic acid surfactant to the alkyl ether carboxylic acid surfactant is from 55:45 to 5:1, preferably from 1.5:1 to 5:1.
  7. A liquid laundry detergent composition according to any preceding claim, wherein the level of water is from 0 to less than 9 wt.%, preferably from 0.01 to 8 wt.%, more preferably from 0.1 to 8 wt.%, most preferably from 1 to 8 wt.%.
  8. A liquid laundry detergent composition according to claim 1, comprising:
    (v) from 60 to 80 wt.% of a linear alkyl benzene sulfonic acid surfactant;
    (vi) from 20 to 40 wt.% of an alkyl ether carboxylic acid surfactant of the following structure:

             R1-(OCH2CH2)n-OCH2-COOH,

    wherein: R1 is selected from saturated C16 to C18 linear alkyl chains,
    and wherein n is selected from 15 to 20;
    (vii) less than 10 wt.% water;
    (viii) from 0 to 20 wt.% non-ionic surfactant of the following structure

             R2-(OCH2CH2)n-OH,

    wherein: R2 is selected from saturated C12 to C22 linear or branched alkyl chains, preferably C16 to C18 linear alkyl chains, and wherein n is selected from 10 to 20;
    wherein the pH of the formulation is from 0.5 to 2.0;
    and wherein the weight ratio of linear alkyl benzene sulfonic acid surfactant to the alkyl ether carboxylic acid surfactant is from 1.5:1 to 4:1.
EP17170422.4A 2017-05-10 2017-05-10 Liquid laundry detergent composition Ceased EP3401384A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP17170422.4A EP3401384A1 (en) 2017-05-10 2017-05-10 Liquid laundry detergent composition
PCT/EP2018/058430 WO2018206196A1 (en) 2017-05-10 2018-04-03 Liquid laundry detergent composition
CN201880025777.XA CN110520514B (en) 2017-05-10 2018-04-03 Liquid laundry detergent compositions
EP18715655.9A EP3622046B1 (en) 2017-05-10 2018-04-03 Liquid laundry detergent composition
BR112019023389-0A BR112019023389A2 (en) 2017-05-10 2018-04-03 COMPOSITION OF LIQUID DETERGENT FOR FABRIC LAUNDERING
ARP180101210A AR111856A1 (en) 2017-05-10 2018-05-09 COMPOSITION DETERGENT LIQUID FOR LAUNDRY OF CLOTHING
ZA2019/06404A ZA201906404B (en) 2017-05-10 2019-09-27 Liquid laundry detergent composition

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EP17170422.4A Ceased EP3401384A1 (en) 2017-05-10 2017-05-10 Liquid laundry detergent composition
EP18715655.9A Active EP3622046B1 (en) 2017-05-10 2018-04-03 Liquid laundry detergent composition

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EP0304763A1 (en) 1987-08-24 1989-03-01 Henkel Kommanditgesellschaft auf Aktien Process for the preparation of ethercarboxylic acids
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DE2816127A1 (en) 1977-05-16 1978-11-23 Kao Corp PROCESS FOR THE PRODUCTION OF AETHERCARBOXYLATES
DE3135946A1 (en) 1981-09-10 1983-03-24 Bayer Ag, 5090 Leverkusen Process for preparing alkoxyacetic acids
EP0304763A1 (en) 1987-08-24 1989-03-01 Henkel Kommanditgesellschaft auf Aktien Process for the preparation of ethercarboxylic acids
EP0328177A2 (en) * 1988-02-10 1989-08-16 Unilever N.V. Liquid detergents
WO2013087286A1 (en) 2011-12-12 2013-06-20 Unilever Plc Laundry compositions
WO2014060235A2 (en) 2012-10-17 2014-04-24 Unilever Plc Laundry compositions
DE102013218614A1 (en) * 2013-09-17 2015-03-19 Henkel Ag & Co. Kgaa Detergent containing ether carboxylates
US20150252294A1 (en) * 2014-03-10 2015-09-10 Board Of Regents, The University Of Texas System High active flowable surfactant blends for detergent and other cleaning applications
WO2016198263A1 (en) * 2015-06-11 2016-12-15 Unilever Plc Laundry detergent composition

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WO2018206196A1 (en) 2018-11-15
ZA201906404B (en) 2021-01-27
EP3622046B1 (en) 2022-07-27
CN110520514A (en) 2019-11-29
CN110520514B (en) 2021-05-07

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