WO2025167883A1

WO2025167883A1 - A combination comprising alkyl polyglycoside and lipid layer enhancer having improved processability

Info

Publication number: WO2025167883A1
Application number: PCT/CN2025/075739
Authority: WO
Inventors: Hsin I PENG; Fei Mo SHI
Original assignee: BASF China Co Ltd; BASF SE
Current assignee: BASF China Co Ltd; BASF SE
Priority date: 2024-02-06
Filing date: 2025-02-05
Publication date: 2025-08-14
Anticipated expiration: 2026-08-06

Abstract

The present invention is related to a combination comprising an alkyl polyglycoside, a lipid layer enhancer and an aliphatic mono-or dihydric alcohol having 2 to 6 carbon atoms. The present invention further relates to use of the combination in preparing a liquid detergent formulation.

Description

A Combination Comprising Alkyl Polyglycoside and Lipid Layer Enhancer Having Improved Processability

Technical field

The present invention relates to a combination of alkyl polyglycoside and a lipid layer enhancer which is selected from the group consisting of esters of fatty acids of chain length C₈-C₂₄, and at least one aliphatic mono-or dihydric alcohol having 2 to 6 carbon atoms. The present invention also relates to use of this combination in a liquid detergent composition.

Background

People very often use cleaning formulations in their daily life whether the formulations are prepared as personal, laundry, dishwashing or surface cleaning formulations. Today, it becomes more crucial to be aware of the safety and benefits of the cleaning formulations. Due to improved awareness of the consumers, their need and lifestyle changes, thus such consumer products also need to change to respond the needs of consumers by manufacturing new products which are multifunctional in nature as being natural, safer and health for human body. In particular, when using the detergent formulations like hand dishwashing cleaning formulations, consumers’ hand come into substantial and prolonged contact with the cleaning products and additionally repeated and extensive exposure to cleaning solutions may lead to the development of skin irritation which may eventually grows into skin lesions and even skin damage.

Sugar surfactants, for example, alkyl polyglycosides are distinguished by excellent detergent properties and high ecotoxicological compatibility. For this reason, these classes of nonionic surfactants are acquiring increasing significance. They are generally used in personal care formulation, liquid and powder detergent formulations, for example, laundry and dishwashing detergents and hair shampoos.

Lipid layer enhancer compounds are usually applied to the skin and/or hair in a rinse-off formulation for conditioning effect. EP 0776658 disclosed a mixture of the sebum-lipid glycerylmonooleate with mild alkyl polyglycosides. The mixture combines the moisturizing properties of the lipid layer enhancer with the mildness of the biobased surfactant. The product can be simply formulated in the surfactant bases with cold process and also provides certain thickening benefits and conditioning benefit.

However, the viscosity of the blend is not stable but goes higher during storage or under a temperature higher than room temperature. This will lead longer dispersing time during formulation. Reason behind might be due to insufficient dispersibility of glyceryl fatty acid ester in presence of alkyl polyglycoside as the blend of alkyl polyglycoside and glycerol fatty acid ester forms an emulsion in lamellar phase, and becomes instable due to fusion of emulsion, in particular with extended storage time or higher storage temperature.

However, it would be more challenging to obtain a combination of alkyl polyglycoside and lipid layer enhancer which shows stable viscosity at high temperature and/or at room temperature for a long storage time, also can demonstrate significantly improved stability, flowability and desirable processability.

Summary of Invention

The surprising discovery has been made by the present invention, that the combination comprising an alkyl polyglycoside, at least one lipid layer enhancer and at least one aliphatic mono-or dihydric alcohol having 2 to 6 carbon atoms, can solve the before mentioned difficulties.

In one aspect, the present invention is related to a combination, comprising an alkyl polyglycoside, at least one lipid layer enhancer which is selected from the group consisting of esters of fatty acids of chain length C₈-C₂₄, preferably glycerol ester of C₁₂-C₂₂ fatty acid, and at least one aliphatic mono-or dihydric alcohol having 2 to 6 carbon atoms,

wherein preferably the alkyl polyglycoside characterized by the formula:

C_nH_2n+1O (C₆H₁₀O₅) _xH,

wherein n is an integer from 8 to 18, preferably from 8 to 16;

x is from 1 to 3, preferably from 1.1 to about 2.7, more preferably from 1.2 to 2;

The combinations of the present invention are useful in a wide variety of products, especially detergent products such as liquid and/or granule laundry detergent formulation, dishwashing detergent composition.

Hence, in a further aspect, the present invention provides a combination for use in preparing a liquid detergent formulation with improved processability. The liquid detergent formulation is preferably a liquid laundry detergent formulation or a liquid dishwashing detergent formulation.

In another aspect, the present invention provides a method for preparing a liquid detergent formulation, comprising one step of adding the combination as defined in the present invention into the formulation, Such method comprises mixing the inventive combination at any point in time during the preparation of the final/finished composition, i.e. at the very start as first addition, or at the end as the very last addition, and/or any time in between.

In still another aspect, the present invention is related to use of the combination as defined in the present invention for preparing a liquid laundry detergent formulation or a liquid dishwashing detergent formulation.

Surprisingly and unexpectedly, the inventors have now discovered that the combination of the present invention has improved stability and stable viscosity, even at a high temperature or at room temperature after a long storage time, and can demonstrate significantly improved flowability and desirable processability. Thus, makes it possible to achieve the objective as outlined above.

Description

Throughout the description, including the claims, the term "comprising one" or “comprising a" should be understood as being synonymous with the term "comprising at least one" , unless otherwise specified, and "between" should be understood as being inclusive of the limits.

The terms “a” , “an” and “the” are used to refer to one or to more than one (i.e., to at least one) of the grammatical object of the article.

The term “and/or” includes the meanings “and” , “or” and also all the other possible combinations of the elements connected to this term.

The term “about” as used herein encompasses the exact number “X” mentioned as e.g., “about X%” etc., and small variations of X, including from minus 5 to plus 5%deviation from X (with X for this calculation set to 100%) , preferably from minus 2 to plus 2%, more preferably from minus 1 to plus 1 %, even more preferably from minus 0.5 to plus 0.5%and smaller variations. Of course, if the value X given itself is already “100%” (such as for purity etc. ) then the term “about” clearly can and thus does only mean deviations thereof which are smaller than “100” .

All temperatures herein are in degrees Celsius (℃) unless otherwise indicated.

It should be noted that in specifying any range of concentration, weight ratio or amount, any particular upper concentration, weight ratio or amount can be associated with any particular lower concentration, weight ratio or amount, respectively.

The term “essentially” used herein, refers to, within the meaning of this invention, that mostly, for example higher than 95%in concentration, or higher than 98%in concentration.

As used herein, the abbreviation of APG stands for alkyl polyglycoside.

Alkyl polyglycoside ( “APGs” ) are a class of non-ionic surfactants comprising a hydrophobic group containing from about 6 to about 30 carbon atoms and a polysaccharide, e.g., polyglycoside, hydrophilic group. When derived from glucose, alkyl polyglycoside are more specifically known as alkyl polyglucosides. The chemical structure of alkyl polyglycoside derived from other sugar molecules is similar, except for the difference in the type of sugar molecule on which the polyglycoside is based.

All the percentages, ratios and proportions herein are by weight, unless otherwise specified.

"Viscosity" is measured by means of a Brookfield Viscometer Model DV2T LVT with a Thermosel System.

The present invention is related to a combination, comprising an alkyl polyglycoside, at least one lipid layer enhancer which is selected from the group consisting of esters of fatty acids of chain length C₈-C₂₄, preferably C₁₂-C₂₂ fatty acid with glycerol, and at least one aliphatic mono-or dihydric alcohol having 2 to 6 carbon atoms:

wherein preferably the alkyl polyglycoside characterized by the formula:

C_nH_2n+1O (C₆H₁₀O₅) _xH,

wherein

n is an integer from 8 to 18, preferably from 8 to 16,

The present invention is related to a combination, comprising an alkyl polyglycoside, at least one lipid layer enhancer which is selected from the group consisting of esters of fatty acids of chain length C₈-C₂₄, preferably glycerol ester of C₁₂-C₂₂ fatty acid, and at least one aliphatic mono-or dihydric alcohol having 2 to 6 carbon atoms:

wherein preferably the alkyl polyglycoside characterized by the formula:

C_nH_2n+1O (C₆H₁₀O₅) _xH,

wherein

n is an integer from 8 to 18, preferably from 8 to 16,

wherein the lipid layer enhancer is saturated or unsaturated C₈-C₂₄ fatty acid ester of glycerol, preferably saturated or unsaturated C₁₂-C₂₂ fatty acid ester of glycerol. And more preferably, the lipid layer enhancer is unsaturated C₁₂-C₂₂ fatty acid ester of glycerol, Still more preferably, the lipid layer enhancer is unsaturated C₁₆ –C₁₈ fatty acid ester of glycerol.

wherein the alkyl polyglycoside characterized by the formula:

C_nH_2n+1O (C₆H₁₀O₅) _xH,

wherein

n is an integer from 8 to 18, preferably from 8 to 16,

x is from 1 to 3, preferably from 1.1 to about 2.7, more preferably from 1.2 to 2, still more preferably 1.2 to 1.8,

particularly, the most preference is given to alkyl polyglucoside;

wherein the lipid layer enhancer is saturated or unsaturated C₈-C₂₄ fatty acid ester of glycerol, preferably saturated or unsaturated C₁₂-C₂₂ fatty acid ester of glycerol. And more preferably, the lipid layer enhancer is unsaturated C₁₂-C₂₂ fatty acid ester of glycerol, Still more preferably, the lipid layer enhancer is unsaturated C₁₆ –C₁₈ fatty acid ester of glycerol;

wherein the aliphatic mono-or dihydric alcohol is selected from the group consisting of ethanol, propanol, isopropanol, propylene glycol, 1, 2-propanediol, butanol, 1, 4-butanediol, 1, 3-butanediol, 2, 3-butanediol, 1-pentanol, and pentane diol, more preferably propylene glycol or isopropanol, still more preferably propylene glycol.

wherein the alkyl polyglycoside characterized by the formula:

C_nH_2n+1O (C₆H₁₀O₅) _xH,

wherein

n is an integer from 8 to 18, preferably from 8 to 16,

particularly, the most preference is given to alkyl polyglucoside;

wherein the lipid layer enhancer is saturated or unsaturated C₈-C₂₄ fatty acid ester of glycerol, preferably saturated or unsaturated C₁₂-C₂₂ fatty acid ester of glycerol. And more preferably, the lipid layer enhancer is unsaturated C₁₂-C₂₂ fatty acid ester of glycerol, Still more preferably, the lipid layer enhancer is ester of glycerol of unsaturated C₁₆ –C₁₈ fatty acid; particularly, the most preference is given to glycerol monooleate;

wherein the aliphatic mono-or dihydric alcohol is selected from the group consisting of ethanol, propanol, isopropanol, propylene glycol, 1, 2-propanediol, butanol, 1, 4-butanediol, 1, 3-butanediol, 2, 3-butanediol, 1-pentanol, and pentane diol; more preferably propylene glycol or isopropanol; still more preferably propylene glycol;

wherein the combination comprises the alkyl polyglycoside having an alkyl group of 8 to 16 carbon atoms, which is present in a range of 15 %to about 60%, preferably 15%to 50%, still preferably 20%to 45%by weight of the total weight of the combination;

wherein the combination of the present invention comprises the lipid layer enhancer which is present in a range of 10%to 35%, preferably 15%to 30%, more preferably 18%to 30%by weight of the total weight of the combination;

wherein the combination of the present invention comprises the aliphatic mono-or dihydric alcohol is present in a range of 2%to 17%, preferably 3%to 15%, more preferably 4%to 14%, most preferably 4%to 12.5%by weight of the total weight of the combination.

wherein the alkyl polyglycoside characterized by the formula:

C_nH_2n+1O (C₆H₁₀O₅) _xH,

wherein

n is an integer from 8 to 18, preferably from 8 to 16,

particularly, the most preference is given to alkyl polyglucoside;

wherein the lipid layer enhancer is saturated or unsaturated C₈-C₂₄ fatty acid ester of glycerol, preferably saturated or unsaturated C₁₂-C₂₂ fatty acid ester of glycerol. And more preferably, the lipid layer enhancer is unsaturated C₁₂-C₂₂ fatty acid ester of glycerol, still more preferably, the lipid layer enhancer is unsaturated C₁₆ –C₁₈ fatty acid ester of glycerol; particularly, the most preference is given to glycerol monooleate;

wherein the aliphatic mono-or dihydric alcohol is selected from the group consisting of ethanol, propanol, isopropanol, propylene glycol, 1, 2-propanediol, butanol, 1, 4-butanediol, 1, 3-butanediol, 2, 3-butanediol, 1-pentanol, and pentane diol; more preferably propylene glycol or isopropanol, still more preferably propylene glycol;

wherein the combination comprises the alkyl polyglycoside having an alkyl group of 8 to 16 carbon atoms, which is present in a range of 15%to about 60%, preferably 15%to 50%, still preferably 20%to 45%by weight of the total weight of the combination;

wherein the combination of the present invention comprises the aliphatic mono-or dihydric alcohol is present in a range of 2%to 17%, preferably 3%to 15%, more preferably 4%to 14%, most preferably 4%to 12.5%by weight of the total weight of the combination;

wherein the combination comprises the alkyl polyglycoside which is a mixture of C₈-C₁₀ alkyl polyglycoside and C₁₀-C₁₆ alkyl polyglycoside. In some more preferred embodiments, the composition comprises the mixture of C₈-C₁₀ alkyl polyglycoside and C₁₀-C₁₆ alkyl polyglycoside in a weight ratio of 1/10 to 10/1, preferably 1/5 to 5/1, more preferably 1/2 to 2/1.

According to any one embodiment of the present invention, the dynamic viscosity of the composition of the present invention, measured at 50℃, is from 1200 to 7000 mPa·s, preferably from 1500 to 5000 mPa·s, more preferably from 1600 to 4500 mPa·s, still more preferably from 2000 to 4500 mPa·s, wherein the dynamic viscosity is measured at 50℃ using a Brookfield LVT viscometer using spindle LV-02 at 12 revolutions per minute (rpm) .

According to any one embodiment of the present invention, the combination of the present invention may be used in cleansing compositions such as laundry detergent compositions and industrial and institutional cleansing compositions, fabric and home care compositions, oil field-formulations such as crude oil emulsion breaker, inks, electro plating compositions, cementitious compositions, lacquers or paints, and agrochemical formulations, preferably in laundry detergent compositions, and in fabric and home care compositions.

The combination of the present invention is suitable for use in a wide range of cleansing products. It is particularly suited to use in liquid laundry detergents and liquid dishwashing detergents. In such an application the composition will be mixed with one or more components to form the final/finished composition; such mixing may occur at any point in time during the preparation of the final/finished composition, i.e., at the very start as first addition, or at the end as the very last addition, and any time in between.

The term “cleansing composition” as used herein includes compositions and formulations designed for cleansing any soiled material, which includes, but are not limited to laundry detergent compositions, industrial and institutional cleansing compositions for use of cleansing for example hard surfaces such as tiles, carpets, PVC-surfaces, wooden surfaces, metal surfaces, lacquered surfaces. The term “fabric and home care compositions” includes for example fabric softening compositions, fabric enhancing compositions, fabric freshening compositions, laundry prewash, laundry pretreat, laundry additives, spray products, dry cleansing compositions, laundry additives, laundry rinse additives, wash additives, post-rinse fabric treatment compositions, ironing aids, dish washing compositions, hard surface cleansing compositions, unit dose formulations, delayed delivery formulations, detergents contained on or in a porous substrate or nonwoven sheet, light-duty and heavy-duty liquid detergent compositions, bleaching compositions.

The present invention also relates to a liquid detergent formulation obtained by mixing the combination of the present invention with at least one component selected from the group consisting of anionic, cationic, nonionic, zwitterionic, amphoteric surfactants, fatty acids, citric acid and/or other builders, chelating agents, bleach and bleach activators, enzymes, conditioning/benefit agents, suds suppressing agents, and soil removing polymers. Preferably the liquid detergent formulation is a liquid detergent formulation or a liquid dishwashing formulation.

The present invention also provides a method for preparing a liquid detergent formulation, comprising a step of adding the combination of the present invention into the formulation, at the start or after the end or at any point during the preparation of the formulation, wherein the liquid detergent formulation is a liquid detergent formulation or a liquid dishwashing formulation.

The present invention also relates to use of the combination of the present invention for preparing a liquid laundry detergent formulation or a liquid dishwashing detergent formulation.

- Liquid detergent formulation (liquid detergents)

The combination of the present invention is suitable for use in liquid laundry detergents and liquid dishwashing detergents. In such an application the combination will be mixed with one or more components chosen from anionic, cationic, nonionic, zwitterionic, amphoteric surfactants, fatty acids, citric acid and other builders, chelating agents, bleach and bleach activators, enzymes, suds suppressing agents, soil removing polymers and other ingredients known to be useful in such detergents.

The liquid detergents may contain one or more components chosen from anionic, nonionic, cationic, zwitterionic, amphoteric surfactants. Preferably, the liquid detergents comprise from 5 to 70%by weight, in particular from 15 to 55 %by weight, more in particular from 25 to 45 %by weight of at least one abovementioned surfactant.

A wide range of anionic surfactant is useful in the invention. Useful anionic surfactants include alkyl aryl sulfonates, alkyl sulfonates, alkyl sulfates, alkyl ether sulfates, alkyl phosphates, amine oxides, isethionates, C₈-C₃₀ fatty acid soaps, taurines, betaines, sulfobetaines, and mixtures thereof. Suitable anionic surfactants are, for example, sulfates of (fatty) alcohols having from 8 to 22, preferably from 10 to 18 carbon atoms, especially C₉C₁₁-alcohol sulfates, C₁₂C₁₄-alcohol sulfates, C₁₂-C₁₈-alcohol sulfates, lauryl sulfate, cetyl sulfate, myristyl sulfate, palmityl sulfate, stearyl sulfate and tallow fat alcohol sulfate. sulfated alkoxylated C₈-C₂₂-alcohols (alkyl ether sulfates) : compounds of this type are prepared, for example, by first alkoxylating a C₈-C₂₂-alcohol, preferably a C₁₀-C₁₈-alcohol, for example a fatty alcohol, and then sulfating the alkoxylation product. For the alkoxylation, preference is given to using ethylene oxide. linear C₈-C₂₀-alkylbenzenesulfonates (LAS) , preferably linear C₉-C₁₃-alkylbenzenesulfonates and -alkyltoluenesulfonates. alkanesulfonates, especially C₈-C₂₄-alkanesulfonates, preferably C₁₀-C₁₈-alkanesulfonates. fatty acid ester sulfonates of the formula R1 CH (SO₃M) CO₂R2 in which R1 is C₆-C₂₀-alkyl, preferably C₈-C₁₆-alkyl, and R2 is C₁-C₄-alkyl, preferably methyl or ethyl, and M is hydrogen, a water-soluble cation, for example alkali metal cation or ammonium ion. olefinsulfonates which from 8 to 22, preferably from 12 to 18, carbon atoms. isethionates, especially acyl isethionates and N-acyl taurates. N-acyl sarcosinates. sulfosuccinates (mono-or diesters of sulfosuccinic acid) and alkyl succinates. organic phosphate esters, especially mixtures of mono-and diester phosphates of hydroxyl-terminated alkoxide condensates and salts thereof. These include polyoxalkylated alkylarylphosphate esters, for example based on alkoxylated C₈-C₂₂-alcohols or alkoxylated phenol derivatives. soaps such as the sodium and potassium salts of C₈-C₂₄-carboxylic acids. The anionic surfactants are added to the detergent preferably in the form of salts. Suitable salts are, for example, alkali metal salts such as sodium, potassium and lithium salts, and ammonium salts such as hydroxyethylammonium, di (hydroxyethyl) ammonium and tri (hydroxyethyl) ammonium salts.

A wide range of nonionic surfactant is useful in the invention (In addition to the alkyl polyglycoside in the combination of the present invention) . The nonionic surfactants will, in general, be polyoxyalkylene compounds, i.e., the product of reaction of alkylene oxides such as ethylene oxide or propylene oxide or mixtures thereof, with starter molecules that contain active hydrogen atoms that are reactive with the alkylene oxide. Such starter molecules include alcohols, amines, carboxylic acids, amides, and mercaptans. Where the starter molecule is an alcohol, the reaction product is known as an alcohol alkoxylate. The polyoxyalkylene compounds can have a variety of block and heteric structures. For example, they can comprise a single block of alkylene oxide, or they can be diblock alkoxylates or triblock alkoxylates. Within the block structures, the blocks can be all ethylene oxide or all propylene oxide, or the blocks can contain a heteric mixture of alkylene oxides. A preferred nonionic surfactant is selected from the class of alcohol ethoxylates, which are alcohol alkoxylates where the alkylene oxide is ethylene oxide. The alcohols used to make the alcohol alkoxylates and the preferred ethoxylates of the invention are, in general, those having from 6 to 18 carbon atoms. A suitable surfactant is an adduct of seven ethylene oxide units with a single C₁₂-C₁₅ alcohol unit. Such surfactants are known to those of skill in the art under various designations. For example, it may be referred to as a 7 mole ethoxylate of a C_12-15 alcohol, or a 7 ethylene oxide adduct, or a C₁₂-C₁₅ alcohol 7 mole ethoxylate, or a 7 EO adduct of a C₁₂-C₁₅ alcohol. All such naming conventions are used interchangeably in the art as well as here.

The liquid detergents may further comprise a cationic surfactant. Suitable cationic surfactants include: C₇-C₂₅-alkylamines; N, N-dimethyl-N- (C₇-C₂₅-hydroxyalkyl) ammonium salts; mono-and di (C₇-C₂₅-alkyl) dimethylammonium compounds quaternized with alkylating agents; ester quats, especially quaternary esterified mono-, di-and trialkanolamines which have been esterified with C₈-C₂₂-carboxylic acids and imidazoline quaternary ammonium.

The liquid detergents may further comprise an amphoteric and/or zwitterionic surfactant. Suitable amphoteric surfactants are derivatives of aliphatic or heterocyclic, secondary and tertiary amines in which the aliphatic radicals preferably have from 8 to 18 carbon atoms and at least one radical comprises one or more anionic water-soluble groups, for example one or more carboxylate, sulfonate, sulfate, phosphate or phosphonate groups. Example of suitable amphoteric surfactants are 3- (alkylamino) propionates, (alkylamino) acetates, 3- (dialkylamino) propionates and (dialkylamino) acetates, where preferably at least one alkyl group comprises from 8 to 18 carbon atoms. [ (2-acylaminoethyl) (2-hydroxyethyl) amino] acetates where the acyl group preferably comprises from 8 to 18 carbon atoms, (alkylamino) propanesulfonates where the alkyl group preferably comprises from 8 to 18 carbon atoms. Suitable zwitterionic surfactants are, for example: amine oxides, especially alkyldimethylamine oxides and alkyldiethylamine oxides, where the alkyl group preferably comprises from 8 to 18 carbon atoms. betaines, especially carbobetaines, sulfobetaines, phosphobetaines, cocoamidopropylbetaine.

The detergent compositions of the present invention may also contain one or more conventional additives found in liquid laundry detergents or other aqueous detergent compositions. Such additives are known to those of skill in the art, and include, for example: anti-redeposition agents; bleaches; builders such as sodium sulfate or sodium carbonate; buffers such as borax; defoamers; enzymes; brighteners; enzyme stabilizers; solvents such as ethanol or glycerol; hydrotropes such as sodium xylene sulfonate; preservatives; softening agents such as quarternary ammonium salts; formulation aids such as sorbitol; fragrances; dyes; and colorants. The types of additives used, and the levels of additives in the formulations, will be chosen by the skilled formulator to produce compositions with the desired detergency and other properties.

According to any one embodiment of the present invention, the liquid detergents may comprise the alkyl polyglycoside in an amount of 0.05%to 20%, or 0.1%to 15%by weight based on the total weight of the liquid detergents; the liquid detergents may comprise the fatty acid ester of glycerol in an amount of 0.2%to 2%by weight based on the total weight of the liquid detergents.

The present invention relates to a method for preparing a liquid laundry detergent formulation or a liquid dishwashing detergent formulation (i.e., each as the “final/finished composition” ) , comprising one step of adding the composition of the present invention into the formulation. Such method comprises mixing the inventive combination at any point in time during the preparation of the final/finished composition, i.e., at the very start as first addition, or at the end as the very last addition, and/or any time in between.

The present invention also relates to use of the composition of the present invention for preparing a liquid laundry detergent formulation or a liquid dishwashing detergent formulation.

The following Examples are provided to illustrate the present invention, which however are not intended to limit the present invention.

Examples

Materials and measurements

Alkyl polyglycoside (APG) : Mixture of C₈-C₁₀ Alkyl polyglucoside with the degree of polymerization of the glucose of approximate 1.3 to 1.5 and C₁₀-C₁₆ alkyl polyglucoside with the degree of polymerization of the glucose of approximate 1.3 to 1.5, in 1: 1 weight ratio, 48%–52%of active matter content, commercially available from BASF.

Glycerol monooleate: 90-O 18

Preparation of combination of alkyl polyglucoside and lipid layer enhancer

Step 1: Designated amount of a short chain alcohol is added in 500 g of C₈-C₁₆ alkyl polyglucoside under constant stirring at 25 rpm for 30 min at 60 ℃.

Step 2: Lipid layer enhancer (glycerol esters, active content) is heated above its melting point until fully melted and gradually added to the mixture obtained in Step 1. The mixture is stirred for 30 min at 100 rpm until fully homogenized. Final product is collected after cooling down.

Dynamic Viscosity measurement:

The instrument used for dynamic viscosity measurement is a Brookfield viscometer (LV, spindle LV-02, 12 rpm, measured at 25℃ or 50℃ respectively) . The obtained combinations are measured after being equilibrated at 25℃ or 50℃ for 30 min. The viscosity measurement results are listed in Table 1.

Claims

A combination comprising an alkyl polyglycoside, at least one lipid layer enhancer which is selected from the group consisting of esters of fatty acids of chain length C₈-C₂₄, preferably glycerol ester of C₁₂-C₂₂ fatty acid, and at least one aliphatic mono-or dihydric alcohol having 2 to 6 carbon atoms,

- wherein preferably the alkyl polyglycoside is characterized by the formula:
C_nH_2n+1O (C₆H₁₀O₅) _xH,

wherein n is an integer from 8 to 18, preferably from 8 to 16, and

x is from 1 to 3, preferably from 1.1 to about 2.7, more preferably from 1.2 to 2.
The combination as defined in claim 1, wherein the at least one lipid layer enhancer is selected from the group consisting of saturated or unsaturated C₈-C₂₄ fatty acid ester of glycerol, preferably saturated or unsaturated C₁₂-C₂₂ fatty acid ester of glycerol, more preferably, the lipid layer enhancer is unsaturated C₁₆ –C₁₈ fatty acid ester of glycerol.
The combination as defined in claim 1 or 2, wherein the at least one aliphatic mono-or dihydric alcohol is selected from the group consisting of ethanol, propanol, isopropanol, propylene glycol, 1, 2-propanediol, butanol, 1, 4-butanediol, 1, 3-butanediol, 2, 3-butanediol, 1-pentanol, and pentane diol, preferably propylene glycol or isopropanol, more preferably propylene glycol.
The combination as defined according to any of claims 1 to 3, wherein the alkyl polyglycoside having an alkyl group of 8 to 16 carbon atoms, is present in a range of 15%to about 60%, preferably 15%to 50%, still preferably 20%to 45%by weight of the total weight of the composition.
The combination as defined according to any of claims 1 to 4, wherein the lipid layer enhancer is present in a range of 10%to 35%, preferably 15%to 30%, more preferably 18%to 30%by weight of the total weight of the composition.
The combination as defined according to any of claims 1 to 5, wherein the aliphatic mono-or dihydric alcohol is present in a range of 2%to 17%, preferably 3%to 15%, more preferably 4%to 14%by weight of the total weight of the composition.
The combination as defined according to any of claims 1 to 6, wherein the alkyl polyglycoside is a mixture of C₈-C₁₀ alkyl polyglycoside and C₁₀-C₁₆ alkyl polyglycoside, preferably the mixture of C₈-C₁₀ alkyl polyglycoside and C₁₀-C₁₆ alkyl polyglycoside is in a weight ratio of 1/10 to 10/1, preferably 1/5 to 5/1, more preferably 1/2 to 2/1.
The combination as defined according to any of claims 1 to 7, wherein the viscosity of the combination measured at 50℃ is from 1200 to 7000 mPa·s, preferably from 1500 to 5000 mPa·s, more preferably from 1600 to 4500 mPa·s; wherein the viscosity is measured at 50℃ using a Brookfield LVT viscometer using spindle LV-02 at 12 revolutions per minute (rpm) .
A liquid detergent formulation obtained by mixing the combination as defined according to any of claims 1 to 8 with at least one component selected from the group consisting of anionic, cationic, nonionic, zwitterionic, amphoteric surfactants, fatty acids, citric acid and/or other builders, chelating agents, bleach and bleach activators, enzymes, conditioning agent and/or benefit agents, suds suppressing agents, and soil removing polymers.
The liquid detergent formulation as defined according to claim 10, is a liquid detergent formulation or a liquid dishwashing formulation.
A method for preparing a liquid detergent formulation, comprising a step of adding the combination as defined according to any of claims 1 to 8 into the formulation, at the start or after the end or at any point during the preparation of the formulation, wherein the liquid detergent formulation is a liquid detergent formulation or a liquid dishwashing formulation.
Use of the composition as defined according to any of claims 1 to 8 for preparing a liquid laundry detergent formulation or a liquid dishwashing detergent formulation.