Otsuka Chemical Co., Ltd.

Otsuka Kagaku Kabushiki Kaisha

Otsuka Kagaku Yakuhin Kabushiki Kaisha

Otsuka Kagaku Yakuhin Kabushini Kaisha

Mitsuo Akada

Hideo Tanaka

Shigeru Torii

Shinji Nakano

Emiko Daimon

Michio Sasaoka

Minoru Yamamoto

Yasuo Shimizu

Tsunehiko Masatomi

Koji Mori

Takashi Ogawa

Sigeru Torii

Masatoshi Taniguchi

Hiroki Kourai

Yoshihisa Tomotaki

Yoshio Yabuhara

Kazuhiro Kawano

Hiroshi Hama

Koji Ishida

Shoji Nakane

Toshifumi Shirakawa

Shiro Yamashita

Akira Suzuki

Kouji Mori

Akihiro Murakami

Weather-resistant composition, coating materials and molded articles

The present invention provides a 2,2&prime;-bis(6-benzotriazolylphenol) compound represented by the formula

2,2&prime;BIS(6-Benzotriazolylphenol) compound, ultraviolet ray absorber comprising the compound, copolymer containing the compound and polymer composition containing the compound

2,2'-Bis(6-benzotriazolylphenol) compound, ultraviolet ray absorber

Bisbenzotriazolylphenol compound

Polymerizable monomer, polymer thereof and process for preparing same

The present invention provides a process for preparing a 1,1-disubstituted ethylene derivative of the formula ##STR1## which comprises reacting lead with a carbinol derivative of the formula ##STR2## wherein R.sup.1, R.sup.2, R.sup.3, X, Y, m and n are defined in the specification. The reaction is conducted more advantageously in the presence of a metal having higher ionization tendency than lead.

Process for preparing 1,1-disubstituted ethylene derivative by reaction

A process for preparing an alkoxyphenol represented by the formula: ##STR1## wherein R is hydrogen, alkyl having 1 to 4 carbon atoms, formyl, hydroxymethyl, alkoxymethyl, dialkoxymethyl, acetoxymethyl or diacetoxymethyl, R' is alkyl having 1 to 4 carbon atoms, and n is an integer of 1 to 5, characterized in that a phenol halide represented by the formula: ##STR2## wherein R and n are as defined above, and X is chlorine or bromine is reacted, in the presence of a copper salt serving as a catalyst and of a solvent, with a product prepared by heating, in the presence of a dehydrating agent, an alkali metal hydroxide and a compound of the formula R'OH wherein R' is as defined above.

Process for preparing alkoxyphenols

Cyclohexadiene derivatives represented by the formula (I) ##STR1## (wherein --X-- represents ##STR2## --Y-- represents ##STR3## and R.sup.1 and R.sup.2 represent a lower alkyl group) and a process for preparing the same.

Cyclohexadiene derivatives and process for preparing the same

Anisaldehyde is prepared by performing at least once the steps of (a) electrolyzing cerium (III) nitrate or ammonium cerium (III) nitrate to obtain water containing cerium (IV) nitrate or ammonium cerium (IV) nitrate and/or a solution of lower alcohol containing the cerium (IV) salt, and (b) oxidizing p-methyl anisole to anisaldehyde with the cerium (IV) salt-containing solution of lower alcohol with or without the water contained therein, or with the cerium (IV) salt-containing water having a lower alcohol admixed therewith.

Process for preparing anisaldehyde

Growing community of inventors

Tokushima, Japan

Mitsuo Akada