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EP-4734914-A1 - PERSONAL CLEANSING COMPOSITION

EP4734914A1EP 4734914 A1EP4734914 A1EP 4734914A1EP-4734914-A1

Abstract

A silicone free aqueous cleansing composition, comprising: i) from 3 to 15 wt % of a sulphated anionic surfactant; ii) from 0.5 to 5 wt % of a zwitterionic surfactant; iii) from 0.1 to 1 wt % a triglyceride oil comprising at least 30 % of fatty chains having a carbon- carbon chain length of 12; iv) from 0.01 to 0.1 wt % caprylic acid; and v) from 0.1 to 2 wt % of a cationic polysaccharide deposition polymer; wherein the ratio of triglyceride oil to caprylic acid is 5:1 to 15:1; wherein the composition is in the form of a microemulsion; and wherein the composition is free from silicone, provides frizz reduction and conditioning benefits to hair.

Inventors

  • AVERY, ANDREW RICHARD
  • Kelso, Hailey
  • ZHOU, RONGRONG

Assignees

  • Unilever IP Holdings B.V.
  • UNILEVER GLOBAL IP LIMITED

Dates

Publication Date
20260506
Application Date
20240611

Claims (14)

  1. 1. A silicone free aqueous cleansing composition, comprising: i) from 3 to 15 wt % of a sulphated anionic surfactant; ii) from 0.5 to 5 wt % of a zwitterionic surfactant; iii) from 0.1 to 1 wt % a triglyceride oil comprising at least 30 % of fatty chains having a carbon-carbon chain length of 12; iv) from 0.01 to 0.1 wt % caprylic acid; and v) from 0.1 to 2 wt % of a cationic polysaccharide deposition polymer; wherein the weight ratio of triglyceride oil to caprylic acid is 5:1 to 15:1; wherein the composition is in the form of a microemulsion; and wherein the composition is free from silicone.
  2. 2. A composition as claimed in claim 1, wherein the sulphated anionic surfactant is selected from sodium laureth ether sulphate, sodium pareth ether sulphate and mixtures thereof.
  3. 3. A composition as claimed in claim 2, wherein the sulphated anionic surfactant has an average degree of ethoxylation of from 1 EO to 3EO.
  4. 4. A composition as claimed in claim 1 or claim 2, wherein the zwitterionic surfactant is selected from a betaine, cocamide monoethanolamide and mixtures thereof, preferably a betaine and mixtures thereof.
  5. 5. A composition as claimed in any preceding claim, which has a weight ratio of the anionic surfactant (i) to the zwitterionic surfactant (ii) of from 3:1 to 10:1.
  6. 6. A composition as claimed in any preceding claim, wherein the triglyceride oil comprises from 30 to 100 wt % of fatty chains having a carbon-carbon chain length of 12.
  7. 7. A composition as claimed in claim 6, wherein the triglyceride oil is selected from coconut oil, palm kernal oil, algal oil and mixtures thereof, preferably coconut oil.
  8. 8. A composition as claimed in any preceding claim, wherein the cationic polysaccharide deposition polymer is selected from cationic dextrans, cationic celluloses and cationic polygalactomannans.
  9. 9. A composition as claimed in claim 8, wherein the cationic polysaccharide deposition polymer is selected from dextran polymer, cationic cellulose derivative and cationic guar.
  10. 10. A composition as claimed in any preceding claim, wherein the ratio of triglyceride oil to caprylic acid is from 6:1 to 12:1.
  11. 11. A composition as claimed in any preceding claim, which is transparent.
  12. 12. A method of treating hair with a composition as claimed in claims 1 - 11 , comprising the step of applying the composition to the hair.
  13. 13. A use of a composition as claimed in claims 1 - 11 to condition hair.
  14. 14. A use of a composition as claimed in claims 1 - 11 to reduce frizz of hair compared to a composition as claimed in claims 1 - 11 that does not comprise caprylic acid and triglyceride oil.

Description

PERSONAL CLEANSING COMPOSITION Field of the Invention The invention is in the field of personal care cleansing products that provide conditioning benefits and are free from silicone. Background of the Invention Consumers desire hair treatments, such as shampoos, that provide conditioning benefits, for example smoothness, ease of comb and softness to their hair. Conditioning benefits are desired and perceived by the consumer both during and after the wash process. Thus, conditioning is evaluated both when the hair is wet and when it is dry. As such, it is desirable that rinse-off haircare products such as shampoos provide multiple benefits at different stages of use. Wet conditioning and dry conditioning are different benefits and are typically delivered in different ways. Silicones are primarily used to provide conditioning benefits at the post drying stages. In silicone-free formulations alternative approaches are required to provide such benefits. Oils have been used as an alternative to silicone in hair products that comprise sulphate free anionic surfactants. However, incorporation of the oil into a base comprising sulphated anionic surfactants presents stability problems, with the oil separating over time, as well as rheological problems, the oil causing viscosity reduction. Sulphated surfactants allow ease of formulation and provision of good foaming properties and viscosity in cleansing compositions. WO 21/175499 (Unilever) discloses personal cleansing composition for the mitigation of dandruff comprising: i) a cleansing surfactant comprising an amphoteric surfactant and an anionic surfactant which if ethoxylated has a degree of ethoxylation of less than 3, in which the ratio of anionic surfactant to amphoteric surfactant is less than 5:1 ; ii) an oil phase comprising at least one triglyceride oil; iii) an aliphatic fatty acid or salt thereof having a carbon chain length from 04 to 010 and iv) a piroctone compound; in which the composition has a pH at 20°C of 6 or less and the weight ratio of aliphatic fatty acid to triglyceride oil is from 1 :2 to 5: 1. Despite the prior art there remains a need for improved conditioning in the absence of silicone in compositions that comprise sulphated surfactants. We have now found that surprisingly, frizz reduction as well as wet and dry lubrication can be delivered from silicone free cleansing compositions having a sulphated anionic surfactant, that comprise a triglyceride oil and caprylic acid in combination with a cationic deposition polymer. The compositions are in the form of a microemulsion and are stable and have excellent viscosity and foaming properties. Summary of the Invention In a first aspect there is provided an aqueous cleansing composition, comprising: i) from 3 to 15 wt % of a sulphated anionic surfactant; ii) from 0.5 to 5 wt % of a zwitterionic co-surfactant; iii) from 0.1 to 1 wt % of a triglyceride oil comprising at least 30 % of fatty chains having a carboncarbon chain length of 12; iv) from 0.01 to 0.1 wt % caprylic acid; and v) from 0.1 to 2 wt % of a cationic polysaccharide deposition polymer; wherein the ratio of oil to caprylic acid is 5:1 to 15:1 ; wherein the composition is in the form of a microemulsion; and wherein the composition is free from silicone. A second aspect provides a method of treating hair with a composition of the first aspect, comprising the step of applying the composition to the hair. A third aspect provides a use of a composition of the first aspect to condition hair. Preferably the conditioning is provided by a reduction in friction on dry or wet hair, preferably wet hair. Use of a composition of the first aspect to reduce frizz of hair is also provided, compared to a similar composition that does not comprise caprylic acid and triglyceride oil. Detailed Description of the Invention Except in the examples, or where otherwise explicitly indicated, all numbers in this description indicating amounts of material or conditions of reaction, physical properties of materials and/or use may optionally be understood as modified by the word “about”. All amounts are by weight of the final personal care composition, unless otherwise specified. It should be noted that in specifying any ranges of values, any particular upper value can be associated with any particular lower value. The sulphated anionic surfactant The composition of the invention includes a sulphated anionic surfactant, preferably selected from sodium laureth ether sulphate (SLES), sodium pareth ether sulphate (SPES) and mixtures thereof. Preferably the anionic surfactant has an average degree of ethoxylation of from 1 EO to 3EO, more preferably 1EO to 2EO. In a typical composition of the invention the level of anionic surfactant will generally range from 3 to 15 wt %, preferably from 5 to 14 wt %, most preferably from 8 to 13 wt % (by weight based on the total weight of the composition and 100 % activity). The zwitterionic co-surfactant The composition of t