| abstract |
1496454 Piperidine compounds SANKYO CO Ltd and CIBA-GEIGY AG 19 May 1976 [28 May 1975] 20635/76 Headings C2C and C2P [Also in Division C3] Piperidine compounds have the formula wherein Ra and Rb are each H, lower alkyl, alkenyl, alkynyl or aralkyl provided that both are not simultaneously H; Rc and Rd are each C 1-7 alkyl groups; Re is alkyl; Rf is alkyl, phenyl, aralkyl or a 5- or 6-membered heterocyclic group containing O, N or S; or Re and Rf together complete a cycloalkyl group or a group X is H, oxyl, alkyl, alkenyl, alkoxyalkyl, aralkyl, 2,3-epoxypropyl or a moiety containing an ester or alcohol group; n is an integer from 1 to 4, and Y is a linking group or atom having a valency of n. The compounds are prepared by known methods. The compounds are stabilizers for polymers. |