| 摘要 |
An improved aqueous human hair relaxer composition is disclosed that contains effective amounts of active human hair straightening ingredients and excipients, and having a pH value of about 12 to about 14, whose improvement comprises the incorporation of a dissolved or dispersed discoloration-inhibiting effective amount of alpha-hydroxy-C1-C6 sulfinate of Formula I, below, where;;R1, R2 and M substituents are defined within. A method of using such a composition to straighten human hair without the discoloration to grey or white hair that normally accompanies relaxation is also disclosed. |
| 主权项 |
1. In a hair relaxer comprising an aqueous composition of active human hair straightening ingredients and excipients having a pH value of about 12 to about 14, the improvement that comprises a naturally grey or white human hair discoloration-inhibiting amount of an alpha-hydroxy-C1-C6 sulfinate of Formula I dissolved or dispersed in said relaxer inaddition to said active straightening ingredients and excipients, wherein
R1 and R2 are the same or different and are hydrogen (hydrido) or hydrocarbyl, or one of R1 and R2 is carboxy or carboxy-substituted hydrocarbyl and the other is hydrido or hydrocarbyl that together (R1+R2) contain a total of five carbon atoms, or R1 and R2 together with the depicted carbon atom form a ring structure that can contain up to six carbon atoms, and M is a proton or a cosmetically acceptable cation such as an ammonium ion, a monovalent metal ion or an equivalent of a divalent metal ion of the Groups Ia, IIa, IIb, IVa or VIIIb of the Periodic Table of the Elements. |
