Adeka Argus Chemical Co., Ltd.

Kyoto University

Ryoji Kimura

Yutaka Nakahara

Motonobu Minagawa

Naohiro Kubota

Tsuneo Tsubakimoto

Tsutomu Kagiya

Ryoichi Oshiumi

Koichi Sakano

A radiation sensitizer of the present invention contains a particular nitrotriazole compound as an active ingredient and accelerates inactivation of intractable hypoxic cells in a malignant tumor by irradiation.

Radiation sensitizer

Polymers of diallyl-1,3,5-triazino-4-(2,2,6,6-tetramethyl piperidyl) amines are provided, having a molecular weight within the range from about 800 to about 20,000, and derived from the monomer: ##STR1## wherein: R.sub.1 is selected from the group consisting of hydrogen; oxyl; alkyl and hydroxyalkyl having from one to about eighteen carbon atoms; alkylaryl having from seven to about eighteen carbon atoms; epoxy alkyl having from three to about eighteen carbon atoms; and acyl having from two to about eighteen carbon atoms;

Diallyl-1,3,5-triazino-4-(2,2,6,6-tetramethyl piperidyl) amines as

Polymers of diallyl 4-(2,2,6,6-tetramethyl piperidyl) amines are provided, having a molecular weight within the range from about 800 to about 20,000, and derived from the monomer ##STR1## wherein: R is selected from the group consisting of hydrogen, oxyl, alkyl and hydroxyalkyl having from one to about eighteen carbon atoms; alkylaryl having from seven to about eighteen carbon atoms; epoxy alkyl having from three to about eighteen carbon atoms and acyl having from two to about eighteen carbon atoms, as well as stabilized synthetic resin compositions having an improved resistance to deterioration by light and containing such a polymer.

Diallyl 4-(2,2,6,6-tetramethyl piperidyl) amines as monomers and

Polymers of diallyl amino-4-(2,2,6,6-tetramethyl piperidyl) carboxylic acid esters and amides are provided, having a molecular weight within the range from about 800 to about 20,000, and derived from a monomer having the formula: ##STR1## wherein: R is alkylene or alkyleneoxy having from one to about six carbon atoms and m is 0 or 1;

Diallyl amino-4-(2,2,6,6-tetramethyl piperidyl) carboxylic acid esters

Synthetic resin compositions of improved resistance to deterioration by heat and light are provided containing a 2,2,6,6-tetramethyl piperidyl ether having the formula: ##STR1## The compounds of the invention can be prepared by the reaction of the 2,2,6,6-tetramethyl piperidyl alcohol R.sub.1 -OH with (poly) trimethylol alkane, (poly) pentaerthritol, or an alcohol containing an oxetane ring, to form the ether. The etherification is carried out by the conventional method, for example, by the reaction of R.sub.1 -OH with the organic sulfonate of the above-mentioned alcohols, or by the reaction of R.sub.1 -OH with the halogenated above-mentioned alcohols in the presence of an alkali or acid acceptor. The compounds where n is equal to 2 or more can be prepared by chain opening polymerization of the corresponding compound containing the oxetane ring.

Growing community of inventors

Urawa, Japan

Ryoji Kimura