Sumitomo Chemical Company, Limited

Kyodo Chemical Company Limited

Kanako Ida

Shinichi Yachigo

Tamaki Ishii

Fumitoshi Kojima

Shinya Tanaka

Manji Sasaki

Toshio Kano

Seiji Sagawa

Kikumitsu Inoue

Takeshi Takata

Hiroshi Kojima

In order to prevent a thermoplastic resin possessing an unsaturated nitrile unit from discoloration, the thermoplastic resin prepared by copolymerizing at least an unsaturated nitrile compound as a polymerizing component in the presence or absence of a rubbery polymer is blended with 2,4-di-t-amyl-6-[1-(3,5-di-t-amyl-2-hydroxyphenyl)ethyl]phenyl acrylate. The resulting composition shows little discoloration during the production and processing stages.

Thermoplastic resin composition

A polyolefin composition comprising a polyolefin, and the following components:

Stabilized polyolefin composition

In a process for producing a thermoplastic resin by emulsion polymerization using a conjugated diene rubber, an aromatic vinyl compound and a vinyl cyanide compound, and by successive flocculation and direct pelletizing, the direct pelletizing is effected in the presence of a phenolic compound represented by ##STR1## wherein R.sup.1 and R.sup.4 are each hydrogen or methyl, and R.sup.2 and R.sup.3 are each an alkyl of 1 to 9 carbon atoms. The use of the phenolic compound is effective to prevent the resin from thermal deterioration during the direct pelletizing, thereby producing the thermoplastic resin excellent in properties such as impact resistance.

Production of thermoplastic resin having high impact resistance

Tris[2-hydroxy-3-(2,2,6,6-tetramethyl-4-piperidylamino)propyl] isocyanurate is useful as a light stabilizer for organic materials. A composition comprising an organic material and the isocyanurate is stable against light and also excellent in heat resistance. The isocyanurate can be produced by the reaction between tris(2,3-epoxypropyl) isocyanurate and 4-amino-2,2,6,6-tetramethylpiperidine.

Isocyanuric acid derivative useful as a light stabilizer

A compound represented by the formula of: ##STR1## wherein R is hydrogen or methyl. This compound is useful as a stabilizer for butadiene polymers.

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Ashiya, Japan

Kanako Ida