Hindered piperidine carboxylic acids, metal salts thereof...

C - Chemistry – Metallurgy – 07 – D

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400/7062, 400/70

C07D 211/46 (2006.01) C07D 211/94 (2006.01) C07F 3/00 (2006.01) C08K 5/00 (2006.01) C08K 5/3435 (2006.01)

Patent

CA 1068277

Abstract of the Disclosure A compound of the formula Image I wherein R1 are same and stand for hydrogen or alkyl having from 1 to 6 carbon atoms, R2 is hydrogen, alkyl having 1 to 12 carbon atoms, alkenyl having 3 to 4 carbon atoms, propargyl, benzyl, alkyl substituted benzyl, aliphatic acyl having 1-4 carbon atoms, C2-C21 alkoxyalkyl or oxyl, R3 is straight-chain alkenylene of 2 to 4 carbon atoms, 1,2-cycloalkylene or 1,2-cycloalkenylene having 4 - 1 - to 6 carbon atoms, 2,3-bicycloalkylene or 2,3-bicycloal- kenylene having 7 or 8 carbon atoms or 1,2-, 1,3-, or 1,4- phenylene or straight-chain alkylene of 1 to 4 carbon atoms substituted by alkyl or alkenyl of 1 to 18 carbon atoms, provided that said straight-chain alkylene substituted by alkyl has in total more than 10 carbon atoms, M is hydrogen or a metal selected from the group consisting of barium, nickel, manganese, calcium, copper, zinc, magnesium, sodium, potassium, cobalt, tin, and dialkyl tin z has a valve of from 1 to 4, the value of z be- ing the same as the available valence of M. The compounds I are useful as light stabilizers for synthetic polymers. - 1a -

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