Sankyo Company, Limited

Hisayou Osawa

Takao Yoshioka

Tomoyuki Kurumada

Syoji Morimura

Keisuke Murayama

Eiko Mori

Toshimasa Toda

Hideo Horiuchi

Susumu Higashida

Katsuaki Matsui

Noriyuki Ohta

A novel piperidine derivative having a stabilizing effect on a synthetic polymeric material and a composition comprising said piperidine derivative and a synthetic polymeric material.

Piperidine derivatives

Novel piperidine derivatives of formula: ##STR1## (wherein 2 or 3 of R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 represent alkyl groups having from 1 to 4 carbon atoms and the remainder of R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are hydrogen atoms, and R.sub.6 represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, a substituted alkyl group, an aliphatic acyl group, an alkoxycarbonyl group or an aralkoxycarbonyl group) are useful as stabilizers for synthetic polymers.

Novel piperidine derivatives for the stabilization of synthetic polymers

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Tokyo, Japan

Hisayou Osawa