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US-12622854-B2 - Hair conditioning composition for improved deposition

US12622854B2US 12622854 B2US12622854 B2US 12622854B2US-12622854-B2

Abstract

A hair conditioning composition for improved deposition of benefit agents including a linear cationic conditioning surfactant, a linear fatty material, a particulate benefit agent, and a branched cationic co-surfactant. The composition includes 0.01 to 10 wt % of the linear, cationic conditioning surfactant, 0.1 to 10 wt % of the linear fatty material, and 0.01 to 5 wt %, at 100% active, of the branched cationic co-surfactant. The molar ratios of branched cationic co-surfactants to linear cationic conditioning surfactants are in the range of from 1:20 to 1:1.

Inventors

  • RICHARD JONATHAN BARFOOT
  • Michael James Cooke
  • Cesar Ernesto MENDOZA FERNANDEZ
  • Paul Damien Price

Assignees

  • CONOPCO, INC.

Dates

Publication Date
20260512
Application Date
20191128
Priority Date
20181219

Claims (16)

  1. 1 . A composition comprising: (i) 0.01 to 10 wt % of a linear, cationic conditioning surfactant; (ii) 0.1 to 10 wt % of a linear fatty material; (iii) a particulate benefit agent; (iv) 0.01 to 5 wt %, at 100% active, of a branched cationic co-surfactant, selected from structure 1 wherein: R 1 , and R 2 comprise linear alkyl chains, saturated or unsaturated, with carbon-carbon chain lengths of from C 6 to C 10 ; n has a range of from 0 to 10; m has a range of from 1 to 6; R 3 comprises an alkyl chain having a carbon-carbon chain length of from C 1 to C 4 ; R 4 is a proton; and X is a halide; wherein the molar ratios of branched cationic co-surfactants (iv) to linear cationic conditioning surfactants (i) are in the range of from 1:20 to 1:1.
  2. 2 . The composition as claimed in claim 1 , wherein the linear cationic conditioning surfactant has the formula 1: N + (R 1 ) (R 2 ) (R 3 ) (R 4 ), wherein R 1 , R 2 , R 3 and R 4 are independently C 1 to C 30 alkyl or benzyl.
  3. 3 . The composition as claimed in claim 1 , wherein the linear cationic conditioning surfactant is selected from behenyltrimethylammonium chloride, behentrimonium methosulphate, cetyltrimethylammonium chloride, and mixtures thereof.
  4. 4 . The composition as claimed in claim 1 , further comprising an amidoamine corresponding to the general formula (II): R 1 CONH(CH 2 ) m N(R 2 )R 3 (II) in which R 1 is a hydrocarbyl chain having 10 or more carbon atoms, R 2 and R 3 are independently selected from hydrocarbyl chains of from 1 to 10 carbon atoms, and m is an integer from 1 to 10; and an acid.
  5. 5 . The composition as claimed in claim 1 , wherein the branched cationic co-surfactant is present in an amount of from 0.1 wt % to 1 wt %.
  6. 6 . The composition as claimed in claim 1 , wherein the molar ratios of branched cationic co-surfactants (iv) to linear cationic conditioning surfactants (i) are in the range of from 1:10 to 1:1.
  7. 7 . The composition as claimed in claim 1 , wherein the particulate benefit agent is selected from conditioning actives, scalp actives, encapsulated fragrance, emulsified fragrance, and mixtures thereof.
  8. 8 . The composition as claimed in claim 7 , wherein the particulate benefit agent is a silicone.
  9. 9 . The composition as claimed in claim 8 , wherein the silicone is present in an amount of from 0.1 wt % to 10 wt % of the total composition.
  10. 10 . The composition as claimed in claim 1 , which has a yield stress in the range of from 30 to 200 Pascals (Pa) peak value at 25° C. and 1 Hz.
  11. 11 . The composition as claimed in claim 1 wherein the branched cationic co-surfactant is present in an amount of from 0.1 wt % to 0.5 wt %.
  12. 12 . The composition as claimed in claim 1 wherein the molar ratios of branched cationic co-surfactants (iv) to linear cationic conditioning surfactants (i) are in the range of from 1:5 to 1:2.
  13. 13 . The composition as claimed in claim 8 , wherein the silicone is present in an amount of from 0.1 wt % to 5 wt %.
  14. 14 . The composition as claimed in claim 8 , wherein the silicone is present in an amount of from 0.25 wt % to 3 wt %.
  15. 15 . The composition as claimed in claim 1 , wherein n is 0 or 1, and m is 1 or 2.
  16. 16 . The composition as claimed in claim 15 , wherein the molar ratios of branched cationic co-surfactants (iv) to linear cationic conditioning surfactants (i) are in the range of from 1:10 to 1:1.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a U.S. 371 National Stage Application of PCT International Application No. PCT/EP2019/082825, with international filing date of Nov. 28, 2019, which claims the benefit of and priority to European patent application No. 18214090.5 filed Dec. 19, 2018, the contents of which are incorporated herein by reference in their entireties. FIELD OF THE INVENTION The invention is concerned with conditioning compositions, containing a branched co-surfactant, for the treatment of hair, which comprise a benefit agent, for example silicone, to be deposited onto the hair during use and particularly relates to a conditioning composition that enables increased amounts of benefit agent to be deposited. BACKGROUND AND PRIOR ART In personal care compositions, such as hair treatment compositions, the deposition and delivery of benefit agents are often key drivers of product performance. For example, many of the hair conditioner products in the market today work to deliver benefits to hair by depositing benefit agents such as fragrance materials, silicones and damage repair actives onto the hair during the wash and care process. However, consumers report being disappointed by the level of benefit derived from use of some compositions. This is usually caused by insufficient amount of benefit agents being delivered to the surface. It is, therefore, desirable to develop compositions that provide improved delivery of benefit materials to a surface, for example hair. Glycine betaine derivatives are known in home and personal care products. These derivatives have been used in hair applications to deliver conditioning benefits to hair. US 2017/087074 (Centre National De La Recherche Scientifique) discloses surfactant compositions for use in cosmetic and pharmaceutical compositions. The compositions include an alkylpolyglucoside grafted with glycine betaine in combination with a glycine betaine and are stable. Similar compositions are disclosed in US 2017/087077. US 2014/246041 (Henkel) discloses a composition for conditioning hair containing a defined esterquat which has a structure that can cover the glycine betaines and at least one care-providing substance(s) selected from the group of L-carnitine and/or salts thereof, and/or taurine and/or salts thereof, and/or vitamins and vitamin precursors, and/or niacinamide, and/or ubiquinone, and/or ectoin. WO 13/083349 discloses a similar esterquat for conditioning keratin fibres. EP 1 016650 (Kao) disclose a method of preparation of a betaine alkyl ester which can be used in hair cosmetics to give feel benefits to hair. Cetanol (ex Kao Corporation) is used in the formulation examples. US2015/0150763 discloses specific conditioning compositions comprising droplets of silicone conditioning agent that enable increased silicone deposition onto hair. Product rheology is a key attribute to consumers. We have, however, found that adding branched surfactant materials into gel networks disrupts the gel bilayers and consequently reduces viscosity and yield stress to unacceptably low levels. Despite the prior art, there remains a need to deliver improved delivery of benefits to hair without compromising on consumer desired viscosity characteristics. We have now surprisingly found that the selection of branched glycine betaine materials in combination with a linear cationic surfactant results in an unexpectedly big enhancement in the deposition of benefit agent whilst maintaining excellent product rheology. All percentages quoted herein are by weight based on total weight, unless otherwise stated. DEFINITION OF THE INVENTION Accordingly, there is provided a composition comprising: (i) 0.01 to 10 wt % of a linear, cationic conditioning surfactant;(ii) 0.1 to 10 wt % of a linear fatty material;(iii) a particulate benefit agent;(iv) 0.01 to 5 wt %, at 100% active, of a branched cationic co-surfactant, selected from structure 1— wherein: R1, and R2 comprise linear alkyl chains, saturated or unsaturated, with carbon-carbon chain lengths of from C4 to C20, preferably from C6 to C18; more preferably from C8 to C12, most preferably from C6 to C10,n has a range of from 0 to 10, preferably selected from 0 and 1;m has a range of from 1 to 6, preferably selected from 1 and 2;R3 comprises an alkyl chain having a carbon-carbon chain length of from C1 to C4, preferably C1 to C2;R4 comprises a proton or an alkyl chain having a carbon-carbon chain length of from C1 to C4, preferably C1 to C2; andX is an organic or inorganic anion; wherein the molar ratios of branched cationic co-surfactants (iv) to linear cationic surfactants (i) are in the range of from 1:20 to 1:1, preferably from 1:10 to 1:1, most preferably 1:5 to 1:2. In a second aspect, the invention provides a method of increasing benefit agent deposition to hair comprising the step of applying to hair a composition of the first aspect, compared to the same composition without a branched cationic cosurfa