CN-122028895-A - Hair conditioning composition

CN122028895ACN 122028895 ACN122028895 ACN 122028895ACN-122028895-A

Abstract

A conditioner composition comprising (a) a conditioning gel phase comprising a cationic conditioning surfactant and a fatty material, and (b) a mixture of amino acids consisting of (i) arginine, (ii) glutamic acid, and (iii) cysteine, which results in a surprising increase in the denaturation temperature of hair proteins, the composition being free of other amino acids.

Inventors

BELL FRASER IAN
R W Dawson
J.M. Roberts
S. J. Singleton

Assignees

联合利华知识产权控股有限公司

Dates

Publication Date: 20260512
Application Date: 20241001
Priority Date: 20231013

Claims (14)

1. A conditioner composition comprising: (a) Conditioning gel phase comprising cationic conditioning surfactant and fatty material, and (B) A mixture of amino acids consisting of (i) arginine, (ii) glutamic acid, and (iii) cysteine; The composition does not contain other amino acids.
2. The composition of claim 1 wherein the weight ratio of (i) to (ii) to (iii) is from 2:1:1 to 1:2:1 to 1:1:2.
3. The composition of claim 1 or 2, wherein the mixture of amino acids is present in an amount of 0.1 to 10% by weight of the total composition.
4. The composition according to any of the preceding claims, comprising a preservative, preferably sodium benzoate.
5. A method of increasing the denaturation temperature of proteins inside hair, comprising the step of applying to hair a composition as defined in any one of claims 1-4, compared to the same composition not comprising a mixture of amino acids consisting of arginine, glutamic acid and cysteine.
6. The method according to claim 5, additionally comprising the step of leaving the composition on the hair for 2 seconds to 20 minutes, preferably 10 seconds to 3 minutes, most preferably 20 seconds to 1 minute.
7. The method of claim 5 or 6, additionally comprising repeating the step of applying the composition to the hair.
8. The method of claim 7, wherein the step of applying the composition to the hair is repeated during subsequent treatments and repeated 1-10 times.
9. The method according to any one of claims 5-8, wherein the hair is straight hair.
10. The method according to any one of claims 5-9, wherein the hair is primary.
11. Use of a mixture consisting of arginine, glutamic acid and cysteine for increasing the denaturation temperature of a protein inside the hair compared to the same composition without the amino acid mixture consisting of arginine, glutamic acid and cysteine.
12. Use of a mixture consisting of arginine, glutamic acid and cysteine in a composition as defined in any of claims 1-4 for increasing the denaturation temperature of a protein inside the hair compared to the same composition without the amino acid mixture consisting of arginine, glutamic acid and cysteine.
13. Use according to claim 11 or 12, wherein the hair is straight hair.
14. The use according to any one of claims 11-13, wherein the hair is primary.

Description

Hair conditioning composition Technical Field The present invention relates to a conditioner composition for hair comprising a mixture of amino acids, the use of said conditioner composition for enhancing and/or repairing hair, and a method of treating hair using said composition. Background Consumers often conduct intensive treatments, care and styling procedures on their hair to help achieve their desired viewing results. The actions performed by the consumer will introduce chemical modifications to the hair keratin protein which result in microscopic and macroscopic structural changes, including loss of protein and amino acids, and in turn, changes in the physical properties of the fiber, which are typically perceived by the consumer as hair damage. Hair consists mainly of proteins, in particular keratin. Differential Scanning Calorimetry (DSC) can be used to measure the denaturation temperature of internal hair proteins. The higher the temperature required for "melting" the hair proteins (i.e. the more energy is required), the stronger and more stable the protein structure. The reduction in denaturation temperature of internal hair proteins is an indicator that the protein has been destroyed and that bond (including hydrogen bonding) loss and loss of crystalline molecular structure have occurred. Thus, an increase in the denaturation temperature of such hair is desirable. It is shown that hair is enhanced and/or damage repaired by bond formation of proteins and increased stability, molecular structure and crystallinity. The extent of damage can be measured by the magnitude of the decrease in denaturation temperature after being subjected to destructive treatment. Conversely, the extent of repair or enhancement may be indicated by the magnitude of the denaturation temperature increase caused by the treatment designed for that purpose. Known treatments involve solving the problem of hair damage due to chemical hair treatment and may involve the use of amino acids. WO 2018/065237 and WO 2018/065248 disclose the use of glutamic acid with proline and aniline to provide improved damage repair of bleached hair, as evidenced by an increase in the denaturation temperature after treatment. WO 00/51556 discloses a hair care composition comprising four or more amino acids, wherein each amino acid is selected from a different group of amino acids. The composition is intended to treat hair subject to a variety of aggressions that can cause weakening and damage. KR2019 0041626 discloses compositions comprising an amino acid complex that may include one or more of lysine, histidine, arginine, aspartic acid, threonine, serine, glutamic acid, proline, glycine, alanine, methionine, leucine, tyrosine, phenylalanine, or cysteine in 0.3 to 5 parts by weight. The composition may be applied to hair prior to perming. However, we found that not all amino acids were equally lost or equally recovered by injury. Furthermore, the amount of missing amino acids will vary depending on the type of hair itself. There remains a need for more effective treatments for hair and damaged hair that provide enhanced benefits such as repair or enhancement during the daily hair care process. We have now found that a mixture of specific amino acids, i.e. a mixture of glutamic acid, cysteine and arginine, in a conditioner can advantageously increase the denaturation temperature of the hair. Surprisingly, the conditioner carrier is critical to achieving a successful increase in denaturation temperature. Disclosure of Invention In a first aspect the present invention provides a conditioner composition comprising: (1) A conditioning gel phase comprising: (a) Cationic conditioning surfactant, and (B) Fatty material, and (2) A mixture of amino acids consisting of (i) arginine, (ii) glutamic acid, and (iii) cysteine; the composition is free of other amino acids. In a second aspect the present invention provides a method of treating hair comprising the step of applying to the hair a composition of the first aspect. This results in an increase in the denaturation temperature of the proteins inside the hair. The denaturation temperature is increased compared to the same composition without the amino acid mixture consisting of arginine, glutamic acid and cysteine. Preferably, the method further comprises the additional step of rinsing the composition on the hair. The method preferably additionally comprises the step of leaving the composition on the hair for a period of from 2 seconds to 20 minutes, preferably from 10 seconds to 3 minutes, most preferably from 20 seconds to 1 minute, and then rinsing the composition from the hair. Preferably, the method additionally comprises the step of repeating the application of the composition to hair. Preferably, the step of applying the composition to the hair is repeated during subsequent treatments and repeated 1 to 10 times. This provides a gradual increase in the denaturation temperature of the proteins inside the