Kao Corporation

Youhei Kaneko

Kohshiro Sotoya

Muneo Aoyagi

Nobuyuki Ogura

Makoto Kubo

Takaya Sakai

Makio Tetsu

To provide a surfactant composition with an excellent foamability and thickening performance and further an excellent storage stability, it comprises the following components (a) and (b): (a) at least one anionic surfactant selected from (1) sulfonate-type anionic surfactants having amide group or ester group, (2) carboxylate-type anionic surfactants and (3) phosphate-type anionic surfactants and (b) a compound expressed by the formula (I):where RCO&#x2014; is an acyl group having 6 to 24 carbon atoms, Ris an alkyl group having 1 to 3 carbon atoms and Ris an alkylene group having 1 to 6 carbon atoms or an alkenylene group having 2 to 6 carbon atoms.

Surfactant composition

To provide processes suitable for industrial production by which high-purity N-(long-chain acyl)amino acid and salt thereof can be prepared from inexpensive raw materials. An alkyl ester of a fatty acid (2) is reacted with an aminonitrile (3) in the presence of a basic catalyst to form an amidonitrile (1), the amidonitrile (1) is hydrolyzed into an N-(long-chain acyl)amino acid salt (4) in the presence of a basic substance, the pH of the resulting aqueous solution is adjusted to a pH from 1 to 5 with a mineral acid to form an N-(long-chain acyl)amino acid (5), and this amino acid is recovered. ##STR1## wherein R.sup.1 CO-- represents a fatty acid residue having 8 to 22 carbon atoms; R.sup.2 represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms; R.sup.3 represents an alkylene group having 1 to 5 carbon atoms; R.sup.4 represents an alkyl group having 1 to 4 carbon atoms; and M represents a monovalent cation.

Processes for the preparation of N-(long-chain acyl)amino acid and salt

A bleaching composition comprises (a) hydrogen or a peroxide to produce hydrogen peroxide in its aqueous solution and (b) an organic peracid precursor having the formula (I) in which a quaternary ammonium is connected with an alkyl through an ether, an amide or an ester. ##STR1##

Bleaching composition

A bleaching composition comprises (a) hydrogen or a peroxide to produce hydrogen peroxide in its aqueous solution and (b) an organic peracid precusor having the formula (I) in which a quaternary ammonium is connected with an alkyl through an ether, an amide or an ester. ##STR1##

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Wakayama, Japan

Youhei Kaneko