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CA-3077389-C - A CONDITIONING SHAMPOO COMPOSITION

CA3077389CCA 3077389 CCA3077389 CCA 3077389CCA-3077389-C

Abstract

The invention relates to a shampoo composition for enhancing deposition of oil drop onto a substrate, comprising a mixture of sulfonated methyl ester compounds containing two or more sulfonated methyl esters of a fatty acid having a chain length of 12 to 20 carbon atoms (C12-C20); a zwitterionic surfactant; an oil phase; and a cationic polymer. The shampoo composition may further comprise an inorganic electrolyte such as sodium chloride. The invention also relates to use of the shampoo composition for enhancing deposition of oil drop onto a substrate, wherein the composition comprises a specific blend of sulfonated methyl ester compounds.

Inventors

  • Peter Atanassov KRALCHEVSKY
  • Rumyana Dobreva STANIMIROVA
  • Jordan Todorov Petkov
  • Hui Xu

Assignees

  • KL-KEPONG OLEOMAS SDN BHD

Dates

Publication Date
20260505
Application Date
20180830
Priority Date
20171003

Claims (8)

  1. 19 CLAIMS 1. A shampoo composition for enhancing deposition of oil drop onto a substrate, comprising: a mixture of sulfonated methyl ester compounds containing two or more sulfonated methyl 5 esters of a fatty acid having a chain length of 12 to 20 carbon atoms (Cl2-C20); cocamidopropyl betaine; an oil phase; and a cationic polymer that is a guar gum; wherein the mixture of sulfonated methyl ester compounds and the cocamidopropyl betaine is present in a combination ratio of 5 - 7.5: 1 by 10 weight.
  2. 2. The composition according to claim 1, wherein the mixture of sulfonated methyl ester compounds is a mixture between Cl2 sulfonated methyl ester and Cl8 sulfonated methyl ester, a mixture between Cl4 sulfonated methyl ester and Cl6 sulfonated methyl ester, a mixture 15 between Cl4 sulfonated methyl ester and Cl8 sulfonated methyl ester, or a mixture between Cl6 sulfonated methyl ester and Cl8 sulfonated methyl ester.
  3. 3. The composition according to claim 1, wherein the mixture of sulfonated methyl ester compounds contains 55% to 95% of Cl6 sulfonated methyl ester and 5% to 45% of Cl8 20 sulfonated methyl ester.
  4. 4. The composition according to any one of claims 1 to 3, wherein the composition further comprises an inorganic electrolyte. 25
  5. 5. The composition according to claim 4, wherein the inorganic electrolyte is sodium chloride or potassium chloride.
  6. 6. The composition according to any one of claims 1 to 5, wherein the mixture of sulfonated methyl ester compounds and the cocamidopropyl betaine is present in a total amount of 6% to 30 20% by weight of the composition. Date Re9ue/Date Received 2024-02-27
  7. 7. The composition according to any one of claims 1 to 6, wherein the oil phase is silicone oil, mineral oil, vegetable oil, or an oil-in-water emulsion thereof. 5
  8. 8. Use of a shampoo composition according to any one of claims 1 to 7 for enhancing deposition of oil drop onto a substrate. Date Re9ue/Date Received 2024-02-27

Description

1 A CONDITIONING SHAMPOO COMPOSITION FIELD OF INVENTION The invention relates to a conditioning shampoo or cleansing composition. In more particular, the invention relates to a shampoo or cleansing composition containing naturally-derived sulfonated methyl esters (SMEs) and having an improved conditioning effect. This shampoo composition is suitable for use in cleansing and 10 conditioning hair and skin, particularly hair and scalp. BACKGROUND OF THE INVENTION 15 Formulations of hair and skin-care products in the industry generally contain small oil drops which condition the hair and skin. Shampoos, cleansing compositions, body washes and other personal care products contain also anionic surfactants, which adsorb and bring negative surface charge to the oil drops and the substrate, such as hair and scalp. The resulting electrostatic repulsion suppresses the oil drop deposition 20 on the substrate. To overcome this undesired effect, the respective formulations of personal-care composition, such as shampoo and cleansing composition, are also added with a cationic polymer, which serves as a mediator of the drop-to-substrate adhesion. In the 25 bulk of solution, the surfactant and polymer form joint aggregates, also known as "coacervates". Hence, both surfactants and polymers may adsorb on the surfaces of the oil drops and on the solid substrate. They are also present in the wetting films intervening between the oil drop and the substrate. The surfactant-polymer interactions in the bulk and in the thin liquid films are of primary importance for the 30 oil drop deposition process. At higher concentrations, the surfactant in the personalcare formulations hydrophilizes the cationic polymer and the oil drop. Upon rinsing of the personal-care formulations from the substrate, most of the surfactant would be 2 washed away, except for the relatively more hydrophobic polymer molecules that still adsorb on the oil drop while mediating its adhesion to the substrate. As a result, there would be an occurrence of oil drop deposition or adhesion upon a certain degree of dilution of the surfactant in the personal-care composition. There are a number of studies in the art relating to determination of the amount of deposited oil by means of spectroscopic methods. These methods characterize the total amount of oil as a final result of the deposition process. They, however, do not give information for the occurrence of the oil drop deposition process, and especially, 10 for the degree of dilution, at which the oil drop deposition begins. As oil drop deposition determines the deposition or adhesion of oil drop as well as the active ingredients carried therein onto the substrate such as hair and scalp, it affects the conditioning effect of the personal-care composition to the substrate. However, the oil drop deposition effects of different surfactants used in the personal-care compositions, 15 such as shampoo or cleansing compositions, have not been investigated in the industry to date from the aspect of their related conditioning effect to the substrate. There are various types of conditioning shampoo or cleansing composition existing in the art, which utilizes sodium lauryl ether sulfate (SLES) as the main surfactant. For 20 example, a hair conditioning shampoo containing 5% to 50% of anionic surfactant such as SLES is disclosed in International publication no. WO 9308787 A2. The hair conditional shampoo can optionally include a zwitterionic surfactant such as betaines and a cationic polymer in its formulation. The document also discloses the use of intermixing silicone oil as a conditioning agent, in which silicone resin is added to 25 enhance the deposition efficiency of the composition. There is, however, no disclosure in the document on the use of any specific type of anionic surfactant in enhancing deposition of oil drop. The oil drop deposition capability of SLES was also not investigated in any of the prior art. 30 SME, which is also known as a-sulfa fatty acid methyl ester or methyl ester sulfonates (MES), is a type of anionic surfactants that has been increasingly used as detergents or wetting agents in numerous industrial and domestic applications, 3 including personal cleansing liquid, shampoo composition, laundry detergents and dish washing detergents. Being derived from natural, renewable resources, such as palm oil, SMEs are known to be biodegradable, renewable and hence considered as green alternative surfactants. SMEs are however, not commonly used in the industry 5 as a main surfactant in shampoo or cleansing composition for hair and scalp. In a more recent technology as described in European patent no. EP 0796084 A2, a skin cleansing liquid containing a lathering synthetic surfactant is disclosed. This lathering synthetic surfactant can be an anionic surfactant such as acyl isethionates, 10 acyl sarcosinates, alkylglycerylether sulfonates, acyl lactylate, and others. The document discloses that the cleansing liqu