A - Human Necessities – 45 – D
Patent
A - Human Necessities
45
D
167/308
A45D 7/04 (2006.01)
Patent
CA 1320450
PERMANENT WAVE COMPOSITION Abstract of the Disclosure This hair waving composition has a self-limiting reaction so that reduction of sulfhydryl bonds and reduc- tion of cystine is effectively discontinued after an interval, for minimizing potential for damage to hair when making a permanent wave. The self-limiting effect is obtained by using a composition containing both the ammonium and monoethanolamine salts of a suitable mercap- tan, preferably thioglycolic acid. In a composition having a pH in the range of from 9 to 9.5 the ratio of ammonium thioglycolate to monoethanolamine thioglycolate is in the range of from 2:1 to 8:1. Preferably the total concentration of ammonium thioglycolate plus mono- ethanolamine thioglycolate is in the of from 3% to 12% by weight. Such a composition may also include from 1% to 10% by weight surfactant, up to 1.5% by weight seques- trant for metal ions, and conditioners, colors, fragrances and the like.
560866
Cannell David William
Mathews Roger Allen
Moore Edward Robert
L'oreal
Oyen Wiggs Green & Mutala Llp
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