Stabilization of polymers by penta- or hexa-substituted 4-piperidinol
申请人:Ciba-Geigy Corporation
公开号:US04075165A1
公开(公告)日:1978-02-21
Polymers, both natural and synthetic, are stabilized against the deterioration resulting from heat and/or light by the incorporation of certain 2,2,6,6-tetra-substituted-4-piperidinol derivatives which additionally have an alkyl, alkenyl, alkynyl or aralkyl substituent at one or both of the 3- and 5- positions.
Novel 7,7,9,9-tetra-substituted-1,3,8-triazaspiro\x9b4.5!decane-2,4-diones \n' having an alkyl or allyl group at either the 6- or the 10- position are useful for the stabilization of polymers against photo- and thermal- deterioration.