Kao Corporation

Makio Tetsu

Makoto Kubo

Takaya Sakai

Kensuke Aoyagi

Yuuki Yokota

Shunsuke Watanabe

Akira Fujiu

Youhei Kaneko

Andreas Picker

Hiromasa Matsumoto

Hidetake Nakamura

Fumiko Sazanami

Hiroki Fujinaga

Atsushi Miyazaki

Sumie Matsuoka

Chisato Igarashi

The present invention relates to a surfactant composition capable of making a dimethylsiloxane highly remain the solid surface, which is a surfactant composition containing an anionic surfactant (A), a cationic surfactant (B), and a dimethylpolysiloxane (C), wherein the following molar ratio Ris 0.10 to 0.90; and the following molar ratio Ris 0.4 or more:

Surfactant composition

A hair cosmetic containing (A) a specified quaternary ammonium salt, (B) a dimethylpolysiloxane having a weight average molecular weight of 300 or more and 3,000 or less, and water, the hair cosmetic being used by applying on the hair and then rinsing away, wherein the content of the component (B) is 0.5 mass % or more and 60 mass % or less, and a receding contact angle (&#x3b8;) of water droplet as measured by the expansion-contraction method with respect to the surface of a polyethylene plate which is applied with the hair cosmetic and then subjected to water washing is 82&#xb0; or more and 110&#xb0; or less. A treatment method of hair including (I) applying the hair cosmetic on the hair and spreading it over the entire hair, and (II) rinsing away the hair cosmetic with water from the entire hair.

Hair cosmetic

The present invention is a method for producing a vesicle composition having an aqueous phase as a continuous phase, the method including a step of dissolving an oil phase containing component (A) a branched fatty acid having a predetermined structure; component (B) a tertiary amine having a predetermined structure; and component (C) an organic acid having 1 to 10 carbon atoms at a temperature that is equal to or higher than a melting point of the oil phase, and a step of carrying out mixing while adding the aqueous phase to the oil phase which is dissolved.

Method for producing a vesicle composition

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.

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Wakayama, Japan

Makio Tetsu