阅读说明：本技术 个人护理组合物和用途 (Personal care compositions and uses ) 是由 G·古斯基 S·韦杰斯 E·史密斯 于 2019-02-26 设计创作，主要内容包括：本文描述了一种个人护理组合物及其用途,其中所述个人护理组合物包含表面活性剂体系,其中所述表面活性剂体系包含：按所述组合物的重量计3％至15％的阴离子表面活性剂,其中所述阴离子表面活性剂是月桂基聚氧乙烯醚(1)硫酸钠SLE1S,按所述组合物的重量计1％至15％的一种或多种辅助表面活性剂；按所述组合物的总重量计0.10％至5.0％、优选地0.20％至2.5％、更优选地0.25％至1.75％、甚至更优选地0.50％至1.75％的一种或多种式I的盐,其中A为选自硫酸根和柠檬酸根的阴离子；其中M为选自1A族碱金属的阳离子,优选地其中M选自锂、钠、钾、铷和铯,更优选地其中M选自锂、钠和钾；并且其中所述个人护理组合物不包含任何金属卤化物,优选地其中所述金属卤化物选自氯化钠、氯化钾、氯化铁II或III和氯化铝。(Described herein is a personal care composition and uses thereof, wherein the personal care composition comprises a surfactant system, wherein the surfactant system comprises: from 3% to 15%, by weight of the composition, of an anionic surfactant, wherein the anionic surfactant is sodium laureth (1) sulfate SLE1S, from 1% to 15%, by weight of the composition, of one or more co-surfactants; from 0.10% to 5.0%, preferably from 0.20% to 2.5%, more preferably from 0.25% to 1.75%, even more preferably from 0.50% to 1.75% by total weight of the composition of one or more salts of formula I wherein a is an anion selected from sulfate and citrate; wherein M is a cation selected from group 1A alkali metals, preferably wherein M is selected from lithium, sodium, potassium, rubidium, and cesium, more preferably wherein M is selected from lithium, sodium, and potassium; and wherein the personal care composition does not comprise any metal halide, preferably wherein the metal halide is selected from the group consisting of sodium chloride, potassium chloride, iron II or III chloride, and aluminum chloride.)

1. A personal care composition, the personal care composition comprising:

(a) a surfactant system, wherein the surfactant system comprises:

from 3% to 15%, by weight of the composition, of an anionic surfactant, wherein the anionic surfactant is sodium laureth (1) sulfate SLE1S,

from 1% to 15%, by weight of the composition, of one or more co-surfactants;

(b) from 0.10% to 5.0%, preferably from 0.20% to 2.5%, more preferably from 0.25% to 1.75%, even more preferably from 0.50% to 1.75% by total weight of the composition of one or more salts of formula I,

wherein A is an anion selected from sulfate and citrate;

wherein M is a cation selected from group 1A alkali metals, preferably wherein M is selected from lithium, sodium, potassium, rubidium, and cesium, more preferably wherein M is selected from lithium, sodium, and potassium; and is

Wherein the personal care composition does not comprise any metal halide, preferably wherein the metal halide is selected from the group consisting of sodium chloride, potassium chloride, iron II or III chloride, and aluminum chloride.

2. The personal care composition of claim 1, wherein the cation M is selected from sodium and potassium.

3. The personal care composition of any preceding claim, wherein the one or more salts are selected from trisodium citrate, tripotassium citrate, sodium sulfate, and potassium sulfate.

4. The personal care composition of any preceding claim, wherein the personal care composition comprises from 0.10% to 5.0%, preferably from 0.50% to 3.0%, more preferably from 0.75% to 2.0%, even more preferably from 1.0% to 1.75%, by weight of the composition, of one or more hydrotropes.

5. The personal care composition of claim 4, wherein the one or more hydrotropes comprise one or more citric acid esters selected from the group consisting of trimethyl citrate, triethyl citrate, tripropyl citrate, tributyl citrate, tripentyl citrate, trihexyl citrate, tricyclohexyl citrate, triisopropyl citrate, triisobutyl citrate, tri-sec-butyl citrate, triisopentyl citrate, tert-butyl dimethyl citrate, and combinations thereof, preferably trimethyl citrate, triethyl citrate, tripropyl citrate, tributyl citrate, and combinations thereof.

6. The personal care composition of claim 5, wherein the one or more salts of formula I comprise one or more citrates, wherein the cation M is selected from sodium and potassium; and wherein the one or more hydrotropes comprise one or more citric acid esters selected from the group consisting of trimethyl citrate, triethyl citrate, tripropyl citrate, tributyl citrate, tripentyl citrate, trihexyl citrate, tricyclohexyl citrate, triisopropyl citrate, triisobutyl citrate, tri-sec-butyl citrate, triisopentyl citrate, tert-butyl dimethyl citrate, and combinations thereof, preferably triethyl citrate; more preferably, wherein the one or more salts of formula I comprise trisodium citrate, and wherein the one or more hydrotropes comprise triethyl citrate.

7. The personal care composition of any preceding claim, wherein the one or more co-surfactants are selected from the group consisting of amphoteric surfactants, zwitterionic surfactants, and mixtures thereof.

8. The personal care composition of claim 7, wherein the one or more co-surfactants comprise a zwitterionic surfactant, preferably a betaine, more preferably a betaine selected from cocamidopropyl betaine, lauramidopropyl betaine, and mixtures thereof, even more preferably cocamidopropyl betaine.

9. The personal care composition of any preceding claim, wherein the surfactant system of the personal care composition further comprises from 1% to 10%, by total weight of the composition, of one or more additional anionic co-surfactants, wherein the one or more additional anionic co-surfactants are selected from the group consisting of isethionate, sarcosinate, sulfosuccinate, sulfonate, sulfoacetate, acylglycinate, acylalanate, acylglutamate, lactate, alkenyl lactate, glucose carboxylate, amphoacetate, taurate, and mixtures thereof.

10. The personal care composition of any one of claims 1 to 8, wherein the surfactant system of the personal care composition further comprises from 1% to 10%, by total weight of the composition, of one or more additional anionic co-surfactants, wherein the one or more additional anionic co-surfactants are selected from the group consisting of polyoxyethylene lauryl ether-1 ammonium sulfate, triethanolamine lauryl polyoxyethylene ether-1 sulfate, sodium tridecylbenzene sulfonate, sodium dodecylbenzene sulfonate, sodium lauroyl sarcosinate, sodium cocoyl sarcosinate, sodium lauroyl methyl isethionate, sodium lauroyl isethionate, sodium cocoyl isethionate, sodium lauroyl glycinate, sodium cocoyl glycinate, potassium lauroyl glycinate, potassium cocoyl glycinate, sodium lauroyl glutamates, sodium lauroyl glycinate, Potassium lauroyl glutamate, sodium cocoyl glutamate, potassium cocoyl glutamate, disodium lauroyl glutamate, dipotassium lauroyl glutamate, disodium cocoyl glutamate, dipotassium cocoyl glutamate, sodium lauroyl lactylate and mixtures thereof.

11. The personal care composition of any preceding claim, wherein the surfactant system of the personal care composition further comprises from 1% to 10%, by total weight of the composition, of one or more nonionic co-surfactants, wherein the one or more nonionic co-surfactants are selected from the group consisting of glucosides, alkylamines, alcohol ethoxylates, alkyl polyglucosides, alkyl glycosides, acyl glutamines, and mixtures thereof.

12. The personal care composition of any preceding claim, wherein the personal care composition does not comprise any sodium laureth (n) sulfate SLEnS, where n is the average moles of ethoxylation, where n is equal to 0, 2, or 3.

13. The personal care composition of any preceding claim, wherein the personal care composition does not comprise any structured anionic surfactant selected from sodium trideceth (n) sulfate, STnS, sodium trideceth sulfate, C, with n between 0 and 3, STnS, sodium trideceth sulfate, C_12-13Sodium alkyl sulfate, C_12-15Sodium alkyl sulfate, C_11-15Sodium alkyl sulfate, C_12-18Sodium alkyl sulfate, C_10-16Sodium alkyl sulfate, C_12-13Sodium alkyl polyoxyethylene ether sulfate, C_12-13Alkyl radicalPolyoxyethylene ether-n sodium sulfate, C_12-14Sodium alkyl polyoxyethylene ether-n sulfate and mixtures thereof.

14. The personal care composition of any preceding claim, wherein the personal care composition is a liquid or a solid; and is in the form of a shower or bath cream, body or foam lotion, gel, lotion, oil, mousse or spray.

15. Use of a personal care composition comprising:

(a) a surfactant system, wherein the surfactant system comprises:

from 3% to 15%, by weight of the composition, of an anionic surfactant, wherein the anionic surfactant is sodium laureth (1) sulfate SLE1S,

from 1% to 15%, by weight of the composition, of one or more co-surfactants;

(b) from 0.10% to 5.0%, preferably from 0.20% to 2.5%, more preferably from 0.25% to 1.75%, even more preferably from 0.50% to 1.75% by total weight of the composition of one or more salts of formula I,

wherein A is an anion selected from sulfate and citrate;

wherein M is a cation selected from group 1A alkali metals, preferably wherein M is selected from lithium, sodium, potassium, rubidium, and cesium, more preferably wherein M is selected from lithium, sodium, and potassium; and is

Wherein the personal care composition does not comprise any metal halide, preferably wherein the metal halide is selected from the group consisting of sodium chloride, potassium chloride, iron II or III chloride, and aluminum chloride, to reduce the maximum viscosity and the slope value of the viscosity curve of the personal care composition versus the weight of the one or more salts by weight of the composition.

16. Use of a personal care composition according to claim 15 to aid processability and personal care composition stability.

Technical Field

The present application relates generally to personal care compositions having desirable foaming and dissolution characteristics, as well as desirable rheological characteristics, when the surfactant system comprises sodium laureth (1) sulfate as the anionic surfactant, rather than a mixture of sodium laureth (3) sulfate and sodium lauryl sulfate, and uses thereof.

Background

Surfactants are widely used in consumer products including personal care products. Many of these surfactant solutions contain elongated micelles and are viscoelastic, which is very important, especially in the design of shampoos and body washes.

In most personal care compositions, anionic surfactants predominate. The simplest and most common of these anionic surfactants is Sodium Dodecyl Sulfate (SDS). In practice, mixed surfactants are often used because polydisperse mixtures are less costly and perform better than single surfactant solutions. The addition of the ionic surfactant Sodium Lauryl Ether Sulfate (SLES) to the Sodium Dodecyl Sulfate (SDS) solution increases the viscosity of the personal care composition at low total surfactant concentrations.

The addition of the zwitterionic surfactant, cocamidopropyl betaine (CAPB), to a solution of Sodium Dodecyl Sulfate (SDS) significantly reduced the interfacial tension. Although the addition of cationic surfactants to anionic surfactants at low surfactant concentrations can greatly increase viscosity, the formation of insoluble complexes can limit the range of useful formulations and are therefore generally avoided in the development of improved personal care compositions.

Commercially available personal care compositions comprise sodium laureth (3) sulfate or sodium lauryl glycol sulfate (SLEnS, where n ═ 3 is the average number of ethylene glycol repeating units), as well as Sodium Lauryl Sulfate (SLS) and cocamidopropyl betaine (CAPB). The rheology of personal care compositions is affected when the surfactant system of the personal care composition is replaced with sodium laureth (1) sulfate (SLE1) and cocamidopropyl betaine (CAPB). At lower concentrations of sodium chloride used as salts in the composition, the viscosity of the personal care composition comprising sodium laureth (1) sulfate (SLE1S) and cocamidopropyl betaine (CAPB) increased in a relatively rapid manner, giving a relatively low weight fraction of sodium chloride, relatively light weight. The thickening efficiency of the surfactant system is affected, thereby compromising the desired foaming and dissolution characteristics.

Thus, there is a need to optimize personal care compositions comprising sodium laureth (1) sulfate and cocamidopropyl betaine (CAPB) with respect to rheology.

There is a need for a personal care composition comprising sodium laureth (1) sulfate and cocamidopropyl betaine (CAPB) to provide satisfactory rheology, foamability and solubility.

Disclosure of Invention

The present invention provides a personal care composition comprising:

(a) a surfactant system, wherein the surfactant system comprises:

from 3% to 15%, by weight of the composition, of an anionic surfactant, wherein the anionic surfactant is sodium laureth (1) sulfate SLE1S,

from 1% to 15%, by weight of the composition, of one or more co-surfactants;

(b) from 0.10% to 5.0%, preferably from 0.20% to 2.5%, more preferably from 0.25% to 1.75%, even more preferably from 0.50% to 1.75% by total weight of the composition of one or more salts of formula I,

m- - - - - -A formula I

Wherein A is an anion selected from sulfate and citrate;

wherein M is a cation selected from group 1A alkali metals, preferably wherein M is selected from lithium, sodium, potassium, rubidium, and cesium, more preferably wherein M is selected from lithium, sodium, and potassium; and wherein the personal care composition does not comprise any metal halide, preferably wherein the metal halide is selected from the group consisting of sodium chloride, potassium chloride, iron II or III chloride, and aluminum chloride.

Use of a personal care composition comprising:

(a) a surfactant system, wherein the surfactant system comprises:

from 3% to 15%, by weight of the composition, of an anionic surfactant, wherein the anionic surfactant is sodium laureth (1) sulfate SLE1S,

from 1% to 15%, by weight of the composition, of one or more co-surfactants;

(b) from 0.10% to 5.0%, preferably from 0.20% to 2.5%, more preferably from 0.25% to 1.75%, even more preferably from 0.50% to 1.75% by total weight of the composition of one or more salts of formula I,

m- - - - - -A formula I

Wherein A is an anion selected from sulfate and citrate;

wherein M is a cation selected from group 1A alkali metals, preferably wherein M is selected from lithium, sodium, potassium, rubidium, and cesium, more preferably wherein M is selected from lithium, sodium, and potassium; and wherein the personal care composition does not comprise any metal halide, preferably wherein the metal halide is selected from the group consisting of sodium chloride, potassium chloride, iron II or III chloride, and aluminum chloride, to reduce the maximum viscosity and the slope value of the viscosity curve of the personal care composition versus the weight of the one or more salts by weight of the composition.

Drawings

While the specification concludes with claims particularly pointing out and distinctly claiming the present invention, it is believed that the present invention will be better understood from the following description when taken in conjunction with the accompanying drawings, wherein:

FIG. 1 shows "salt curves" obtained by plotting zero shear viscosity versus weight fraction of salt in a personal care composition, these salt curves being distinguished by the nature of the salt according to the invention, including example A containing trisodium citrate, example B containing sodium sulphate, example C containing tripotassium citrate, and comparative example i containing sodium chloride; and

FIG. 2 shows "salt curves" obtained by plotting zero shear viscosity versus weight fraction of salt in a personal care composition, these salt curves being distinguished by the nature of the salt according to the invention and the hydrotrope (when applicable), including example A containing trisodium citrate, example F containing trisodium citrate and triethyl citrate, example E containing sodium chloride and triethyl citrate, comparative example i containing sodium chloride, and a control

Detailed Description

General definitions

In this document, the following definitions apply, unless otherwise specifically indicated, in all embodiments comprising all aspects of the invention.

All percentages are by weight (w/w) of each composition, unless otherwise indicated. All ratios or percentages are by weight unless otherwise specifically indicated. "% by weight" means weight percent. References to "parts" such as a mixture of 1 part X and 3 parts Y are ratios by weight. Unless otherwise indicated, when more than one composition is used during treatment, the total weight is considered to be the total weight of all compositions applied simultaneously to the hair or skin (i.e. the weight present "on head").

"QSP" or "q.s." means a sufficient amount for 100% or for 100 g. +/-indicates the standard deviation. All ranges are inclusive and combinable. The number of significant figures indicates that neither a limitation of the indicated quantity nor a limitation of the accuracy of the measurement is expressed.

Unless otherwise indicated, all measurements are understood to be made at 20 ℃ and at ambient conditions, where "ambient conditions" refers to a pressure of 1 atmosphere (atm) and at 65% relative humidity. "relative humidity" refers to the ratio of the moisture content of air (shown as a percentage) compared to the saturated moisture content at the same temperature and pressure. The relative humidity may be obtained by a hygrometerThe probe hygrometer from International.

"min" herein means "one minute" or "several minutes". "mol" herein means "mol". "g" herein after the number refers to "grams". "ex." refers to "examples". All amounts referred to in the list of ingredients are based on the active ("solids") content and do not include carriers or by-products that may be included in commercially available materials.

Herein, "comprising" means that other steps and other ingredients may be included in addition to the above. "comprising" encompasses the terms "consisting of …" and "consisting essentially of …". The compositions, methods, and uses of the present invention can comprise, consist of, and consist essentially of the elements and limitations of the invention described herein, as well as any additional or optional ingredients, components, steps, or limitations described herein. Unless indicated to be incompatible, the embodiments and aspects described herein may include or be combined with elements, features or components of other embodiments and/or aspects, although not explicitly exemplified in combination.

As used herein, articles including "a" and "an" when used in a claim should be understood to mean one or more of what is claimed or described.

As used herein, the terms "include," "comprises," and "comprising" are intended to be non-limiting.

In the case of the content ranges given, these are to be understood as the total amount of the stated ingredients in the composition, or in the case of more than one substance falling within the range defined by the ingredients, the total amount of all ingredients in the composition conforms to the stated definition.

For example, if the composition comprises 1% to 5% fatty alcohol, a composition comprising 2% stearyl alcohol and 1% cetyl alcohol and no other fatty alcohols would fall within this range.

The amount of each particular ingredient or mixture thereof described below can be up to 100% (or 100%) of the total amount of ingredients in the composition.

As used herein, the term "substantially free" means less than 1%, less than 0.8%, less than 0.5%, less than 0.3%, or less than an insubstantial amount, based on the total weight of the composition.

As used herein, the term "mixture" is meant to include simple combinations of substances, as well as any compounds produced by combinations thereof.

As used herein, the term "molecular weight" or "m.wt." refers to weight average molecular weight, unless otherwise specified. The weight average molecular weight can be measured by gel permeation chromatography ("GPC").

As used herein, the term "personal care composition" refers to a composition intended for topical application to the skin or hair for cleansing.

As used herein, the term "sodium laureth (n) sulfate" or "sodium laureth sulfate (SLEnS)" refers to the abbreviation for sodium laureth sulfate containing an average of "n" ethoxy groups. Thus, sodium laureth (1) sulfate (SLE1S) is an abbreviation for SLEs, which has on average one ethoxy group, but the number of ethoxy groups is distributed in the range of 0 to 10. Sodium laureth (3) sulfate (SLE3S) is an abbreviation for SLEs having an average of three ethoxy groups.

As used herein, the term "hydrotrope" refers to a compound that is capable of dissolving a hydrophobic compound in an aqueous solution (by means other than micellar solubilization).

Benefits of salt and optionally adding a hydrotrope

The maximum viscosity of the salt profile of the personal care compositions of the present invention is due to the formation of micellar branches.

Replacing the surfactant system of a personal care composition comprising sodium laureth (3) sulfate (SLE3S), Sodium Lauryl Sulfate (SLS), and cocamidopropyl betaine (CAPB) with sodium laureth (1) sulfate (SLE1S) and cocamidopropyl betaine (CAPB) results in a change in the rheology of the personal care composition. The salt curve of the personal composition comprising sodium laureth (1) sulfate (SLE1S) and cocamidopropyl betaine (CAPB) shifted to lower sodium chloride salt concentrations, but had a higher maximum viscosity and in a faster manner, i.e. a relatively higher slope of the salt curve. In this case, the thickening efficiency of the surfactant system is affected, thereby impairing the desired foaming and dissolution characteristics.

The object of the present invention is to optimize a personal care composition comprising sodium laureth (1) sulfate and cocamidopropyl betaine (CAPB) with respect to rheology.

It is an object of the present invention to provide a personal care composition comprising sodium laureth (1) sulfate and cocamidopropyl betaine (CAPB) which has satisfactory rheology, lathering and solubility.

The desired rheology should be similar or even improved relative to the rheology exhibited by personal care compositions comprising sodium laureth (3) sulfate (SLE3S), Sodium Lauryl Sulfate (SLS), and cocamidopropyl betaine (CAPB).

It is an object of the present invention to improve the rheology of personal care compositions comprising sodium laureth (1) sulfate (SLE1S) and cocamidopropyl betaine (CAPB) relative to personal care compositions comprising sodium laureth (3) sulfate (SLE3S), Sodium Lauryl Sulfate (SLS) and cocamidopropyl betaine (CAPB).

It is an object of the present invention to provide a personal care composition and the use of the composition as described in the summary of the invention or as described below for achieving these technical effects or objectives. These objects and other advantages, which are obtained by the present invention and which are described in the above summary and the detailed description and defined in the following claims, will be apparent to those skilled in the art.

Personal care compositions comprising sodium laureth (1) sulfate (SLE1S) and cocamidopropyl betaine (CAPB) form micellar systems in which relatively small micelles are formed and are made elongated by adding sodium chloride as a salt to linear and cylindrical micelles (worm-like micellar structure). These small micelles are tangled together, providing greater rigidity to the micellar system via the addition of sodium chloride. The micellar system starts to thicken at a relatively very low weight fraction of sodium chloride compared to a reference micellar system comprising sodium laureth (3) sulfate (SLE3S), Sodium Lauryl Sulfate (SLS), and cocamidopropyl betaine (CAPB). At such low weight fractions of sodium chloride, the maximum viscosity increases significantly, making the personal care composition too thick to potentially get impaired foaming or dissolution characteristics. This phenomenon is further characterized below by a salt curve having a relatively very steep slope.

It has been surprisingly found that the properties of the salt can influence the micellar character of the surfactant system of the personal care composition by altering the assembly between the surfactant head groups.

Only certain salts, optionally in combination with certain classes of hydrotropes, can affect the thickening efficiency of the surfactant system. By varying micelle formation and surfactant assembly, personal care compositions can be provided that exhibit relatively low maximum viscosities at higher salt weight fractions. In this case, the salt curve representing the relationship between zero shear viscosity and weight fraction of salt does not appear to be as steep as the associated salt curve for a personal care composition comprising laureth (1) sodium sulfate (SLE1S), cocamidopropyl betaine (CAPB) and sodium chloride as the salt (see comparative example i).

The rheological profile of the personal care composition comprising sodium laureth (1) sulfate and cocamidopropyl betaine (CAPB) becomes more representative than the rheological profile comprising sodium laureth (3) sulfate, Sodium Lauryl Sulfate (SLS), cocamidopropyl betaine (CAPB) and sodium chloride.

It has been found that when the salt of formula I is substituted for sodium chloride, the salt profile shifts to higher salt concentrations. Thus, at lower salt weight ratios, the viscosity of the personal care composition is reduced when the salt having formula I is used. The maximum viscosity and the slope of the salt curve may also decrease.

The salt has the general formula I:

m- - - - - -A formula I

Wherein A is an anion selected from sulfate and citrate;

wherein M is a cation selected from group 1A alkali metals, preferably wherein M is selected from lithium, sodium, potassium, rubidium, and cesium, more preferably wherein M is selected from lithium, sodium, and potassium;

such salts are trisodium citrate, tripotassium citrate, sodium sulphate and potassium sulphate.

It has been found that such a curve shift cannot be obtained with metal halides such as potassium chloride, iron II or III chloride and aluminum chloride.

Furthermore, it has been found that when sodium chloride is replaced by a salt of formula I in combination with a hydrotrope, especially a citrate ester such as triethyl citrate, the salt profile shifts to higher salt concentrations and the maximum viscosity decreases significantly, which means that long micelles and micelle branches are easily formed (the maximum viscosity is due to the formation of micelle branches).

It has been found that the rheology of personal care compositions can be optimized when adding the salt of formula I, optionally in combination with a citrate as a hydrotrope. In this case, the foaming and dissolution properties are not impaired or even improved.