Adeka Argus Chemical Co., Ltd.

Argus Chemical Corporation

Bunji Hirai

Yutaka Nakahara

Naohiro Kubota

William E Leistner

Kazuo Sugibuchi

Mitsuharu Kanai

Motonobu Minagawa

Tohru Haruna

Bis-(2,2,6,6-tetramethyl-piperidyl)diimides are provided, having the formula: ##STR1## in which R is selected from the group consisting of hydrogen; oxyl; alkyl and alkenyl having from one to about eighteen carbon atoms; epoxy and hydroxyalkyl having from two to about eight carbon atoms; acyl having from two to about eight carbon atoms; and phenalkyl having from seven to about twelve carbon atoms; and Z is a tetravalent aliphatic or cycloaliphatic hydrocarbon group having from two to about eighteen carbon atoms; and stabilizer and synthetic polymer compositions containing such diimides having improved resistance to deterioration when exposed to light.

Bis-(2,2,6,6-tetramethyl-piperidyl) diimides as light stabilizers for

Vinyl benzyl 2,2,6,6-tetramethyl piperidines are provided, having the formula: ##STR1## wherein: R is selected from the group consisting of hydrogen; oxyl; acyl and alkyl having from one to about eighteen carbon atoms; ##STR2## in which Y is --O-- or --N(R.sub.2)--, R.sub.1 is alkyl having from one to about eighteen carbon atoms and R.sub.2 is hydrogen or alkyl having from one to about eighteen carbon atoms.

Vinyl benzyl 2,2,6,6-tetramethyl piperidines

Vinyl benzyl 2,2,6,6-tetramethyl piperidines are provided, having the formula: ##STR1## wherein: R is selected from the group consisting of hydrogen; oxyl; acyl and alkyl having from one to about eighteen carbon atoms;

A process is provided for preparing triacetone amine (2,2,6,6-tetramethyl-4-oxo piperidine) by reacting acetone and/or an acid condensate of acetone with ammonia in the presence of at least one catalyst selected from the group consisting of organotin halides, 1,3,5,2,4,6-triazatriphosphorin hexahalides and cyanuric halides.

Process for preparing triacetone amine

N-2-Hydroxypropyl piperidines are provided, as well as a process for preparing these compounds, having the formula: ##STR1## wherein X is selected from the group consisting of , ##STR2## wherein R.sub.1 is selected from the group consisting of hydrogen; alkyl; alkenyl; cycloalkyl; alkaryl; hydroxyalkyl; oxyalkyl; acyl and aroyl having from one to about eighteen carbon atoms;

N-2-Hydroxypropyl piperidines and compositions thereof

There is disclosed a process for preparing 2,2,6,6-Tetramethyl-4-oxopiperidine (triacetoneamine), in which a hydrazine hydrohalide salt catalyzes the reaction of an acetone compound, for example acetone or diacetone alcohol, with an ammonia donor compound, for example ammonia or 2,2,4,4,6-pentamethyl-1,2,5,6-tetrahydropyrimidine (acetonine).

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Kuki, Japan

Bunji Hirai