Polyethylene stabilizer compositions comprising compounds with piperidine groups and metal compounds

Claim 1

A stabilized polyethylene composition which comprises (a) polyethylene, and (b) an effective light stabilizing amount of (A) one or more compounds containing a group of formula I ##STR59## in which R is hydrogen, C 1 -C 4 -alkyl, allyl, benzyl, acetyl, acryloyl, 2-hydroxyethyl or 2-hydroxypropyl, and (B) one or more than one oxide or hydroxide of Al, Mg or Zn; wherein the compound of component (A) is selected from the group consisting of the compounds of the formulae (II), (III), (IV), (X) and (XXI). ##STR60## in which R 1 is C 1 -C 8 -alkyl, cyclohexyl, 2,2,6,6-tetramethyl-4-piperidyl or 1,2,2,6,6-pentamethyl-4-piperidyl, R 2 is hydrogen or C 1 -C 8 -alkyl, R 3 is hydrogen or methyl, R 4 is C 2 -C 6 -alkylene and n is a number from 2 to 20; ##STR61## in which R 1 is hydrogen or methyl, R 2 is C 2 -C 6 -alkylene, R 3 is C 2 -C 6 -alkylene, 2-hydroxytrimethylene or xylylene and n is a number from 2 to 20. ##STR62## in which R 1 is hydrogen or methyl, R 2 is hydrogen, C 1 -C 8 -alkyl, cyclohexyl, 2,2,6,6-tetramethyl-4-piperidyl or 1,2,2,6,6-pentamethyl-4-piperidyl, n is 2, 3 or 4 and R 3 is the radical of an n-valent polyamine; ##STR63## in which R 1 is hydrogen or methyl, R 2 is C 2 -C 6 -alkylene and n is a number from 2 to 20; and ##STR64## in which R 1 is C 1 -C 8 -alkyl, cyclohexyl, benzyl or C 2 -C 4 -alkyl substituted by C 1 -C 4 -alkoxy or dimethylamino or diethylamino, R 2 is hydrogen or methyl, X is morpholino or a group --NR 3 R 4 , --OR 5 or a group ##STR65## where R 3 and R 4 which can be identical or different are C 1 -C 8 -alkyl, cyclohexyl, benzyl or C 2 -C 4 -alkyl substituted of OH, C 1 -C 4 -alkoxy, dimethylamino or diethylamino, R 4 can also be hydrogen and R 5 is C 1 -C 8 -alkyl, allyl, cyclohexyl or benzyl.