Seiwa Kasei Company, Limited

Issei Yoshioka

Yoichi Kamimura

Masao Kitano

Yujiro Goto

An aqueous permanent waving composition containing as a reducing agent a quaternary ammoniomercaptan or its salt of the formula: ##STR1## wherein R.sup.1, R.sup.2, and R.sup.3 are an alkyl group or a hydroxyalkyl group, A is an alkylene group, and X is a halogen atom, NO.sub.3, 1/2SO.sub.4, OH or R.sup.4 OSO.sub.3 in which R.sup.4 is an alkyl group, which can be used under an acidic, neutral or alkaline condition and can impart good waves to hairs with a little damage of the hairs and a little foul smell.

Permanent waving composition

Water-soluble keratin hydrolyzate having at least two mercapto groups in one molecule and having an average molecular weight of 2,000 to 20,000, suitable for cosmetic application to the hair, particularly as hair fixatives. The hydrolyzate is prepared by reducing keratin in an aqueous solution of a reducing agent under alkaline conditions and subjecting the resulting reduction product to enzymatic hydrolysis.

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Hirakata, Japan

Issei Yoshioka