Seiwa Kasei Company, Limited

Other

Seikwa Kasei Company, Limited

Masato Yoshioka

Hiroshi Shintani

Takashi Adachi

Akihiro Segawa

Terumi Yoshihara

Emi Segawa

Masakazu Okumura

Nobuaki Hattori

Yuta Homma

Akane Kamiyama

Keiichi Uehara

Koji Nosaka

Naoya Hashimoto

Yuka Ueda

Norihisa Taira

Sueko Kobayashi

Shota Tomihisa

Disclosed is an ascorbic acid derivative or a salt thereof wherein at least one of hydrogen atoms in hydroxy groups at the 2-position and the 3-position of ascorbic acid is substituted by R&#x2014;O&#x2014;CH&#x2014;CH(OH)&#x2014;CH&#x2014;, R&#x2014;O&#x2014;CH&#x2014;CH(CHOH)&#x2014;, R&#x2014;CH(CHOH)&#x2014;, R&#x2014;CH(OH)&#x2014;CH&#x2014; (wherein R represents an alkyl group, an alkenyl group or a phenyl group), or a hydroxycyclohexyl group. Also disclosed is a method for producing an ascorbic acid derivative or a salt thereof, which is characterized by reacting ascorbic acid with an epoxy compound such as an alkyl glycidyl ether, an epoxy alkane or an alicyclic epoxy.

Ascorbic acid derivative or salt thereof, production method thereof, and cosmetic

Microcapsule containing core material and method for producing the same

Silane copolymer and a method for producing the same

Cosmetic composition

A base materials for cosmetics which comprises a silylated peptide of the formula (I): ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are the same or different and each is methyl group or hydroxyl group, R.sup.4 is a group bonding the terminal amino group in a side chain of a basic amino acid to the .alpha.-carbon atom wherein the side chain --R.sup.4 NH.sub.2 may partly form an N-heterocyclic ring, R.sup.5 is a side chain of an amino acid other than the above basic amino acid, A is methylene, propylene, --CH.sub.2 OCH.sub.2 CH(OH)CH.sub.2 -- or --(CH.sub.2).sub.3 OCH.sub.2 CH(OH)CH.sub.2 -- group, m is 0 to 100, n is 0 to 100, and m+n is 1 to 100, provided that m and n only show the number of amino acid units, but not amino acid sequence. The silylated peptide (I) is very useful as an additive for hair and skin cosmetics, particularly for aqueous cosmetics, and have excellent pH and storage stabilities and excellent properties such as gloss and moisture impartment to hairs and skins, improvement of combability of hairs, prevention of hairs from being damaged, restoration of damaged hairs, smoothing skin, and the like.

Base material for cosmetics and uses of the same

Growing community of inventors

Osaka, Japan

Masato Yoshioka