| abstract |
Ethylenically unsaturated compounds containing 1-hydroxycarbyloxy-2,2,6,6-tetramethylpiperidine moieties represent reactable stabilizers which may be homopolymerized or copolymerized with other ethylenically saturated monomers to form non-migrating, light stabilizers which are very effective in stabilizing polyolefins and other polymer substrates against the deleterious effects of actinic light. The compounds comprise an ethylenically unsaturated, polymerizable monomer containing a hindered amine moiety substituted on the 1-N atom with a hydrocarbyloxy group, said moiety having the formula E where L1 and L2 are independently alkyl of 1 to 4 carbon atoms, or L1 and L2 together are pentamethylene, and R1 is hydrocarbyl, and said monomer is selected from the group consisting of formulas I-IX E-X-CO-(CH=CH)n -CO-X-E (I) E-X-CH2CH = CHCH2-X-E (VII) E-X1-CT1=CT2T4 (IX) where R1 is alkyl of 1 to 35 carbon atoms, alkenyl of 2 to 18 carbon atoms, alkynyl of 2 to 18 carbon atoms, aralkyl of 7 to 15 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, cycloalkenyl of 5 to 12 carbon atoms, a radical of a saturated or unsaturated bicyclic or tricyclic hydrocarbon of 7 to 12 carbon atoms, or aryl of 6 to 10 carbon atoms or said aryl substituted by alkyl, X is a direct bond, -O(polyoxyalkyleneO)- of 2 to 12 carbon atoms, -O-, -NH- or -NG-, where G is alkyl of 1 to 8 carbon atoms, X1 is a direct bond or -O-, n is 1 or 2, T1, T2 and T4 are independently hydrogen, halogen, alkyl of 1 to 18 carbon atoms or aryl of 6 to 10 carbon atoms, T3 is hydrogen or methyl, and R2, R3 and R4 are independently hydrogen or alkyl of 1 to 12 carbon atoms, or R2 is also cyano in formula III. |