Nippon Shokubai Co., Ltd.

Seiwa Kasei Company, Limited

Yujiro Goto

Masao Kitano

Seiichi Suzuki

Yoichi Kamimura

Issei Yoshioka

Mitsuaki Yagisawa

Cystamine is produced by a method which comprises reacting a 2,2-dialkyl thiazolidine represented by the general formula (1): ##STR1## wherein R.sup.1 and R.sup.2 independently are alkyl groups of 1 to 5 carbon atoms, with a peroxide in the presence of water. An alkylene oxide adduct of cystamine is produced by a method which comprises reacting the reaction mixture obtained as described above further with an alkylene oxide. These cystamine and alkylene oxide adduct of cystamine are useful as an additive for an aqueous lubricant.

Method for production of cystamine and alkylene oxide adduct thereof,

A method for the production of N-(2-chloroethyl) methanesulfonamide of high purity, which method comprises causing methanesulfonyl chloride to react with ethylene imine in the presence of ethylene dichloride and then distilling there resultant reaction mixture thereby separating therefrom N-(2-chloroethyl) methanesulfonamide, if necessary subjecting the resultant reaction mixture to extraction from water, separating the aqueous layer consequently formed, and subjecting the organic layer resulting from said extraction to distillation thereby separating N-(2-chloroetyl) methanesulfonamide.

Method for production of N-(2-chloroethyl) methanesulfonamide

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.

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Kawasaki, Japan

Yujiro Goto