Peroxide free radical initiators containing ultraviolet light stabilizing groups

Claim 1

In the process of preparing a polymer containing an ultraviolet light stabilizer chemically bound to said polymer comprising polymerizing an ethylenically unsaturated monomer capable of being polymerized by free radicals in the presence of a free radical initiator the improvement comprising polymerizing said monomer in the presence of a free radical initiator containing ultraviolet light stabilizing groups and having the formula: (R-O-O).sub.n R' wherein n is 1 to 4 with provisos (a) through (f) recited below, a. when n is 1, R and R' are the same or different and are selected from the group consisting of hydrogen, acyl of 2-20 carbons, aroyl of 7-20 carbons, tert-alkyl of 4-12 carbons, tert-cycloalkyl of 4-12 carbons, tertaralkyl of 9-15 carbons, alkoxycarbonyl of 2-20 carbons, cycloalkoxylcarbonyl of 4-20 carbons, carbamoyl, phenylcarbamoyl, alkylcarbamoyl of 2-13 carbons, cycloalkylcarbamoyl of 4-13 carbons, α-hydroxyalkyl of 2-10 carbons, α-hydroxycycloalkyl of 3-10 carbons, α-hydroperoxyalkyl of 2-10 carbons, α-hydroperoxycycloalkyl of 3-10 carbons, alkylsulfonyl of 4-10 carbons, cycloalkylsulfonyl of 3-12 carbons, tert-(alkyloxyalkyl) of 4-20 carbons, tert-(alkoxycycloalkyl) of 4-20 carbons, Q 3 M, Q 2 M', diethylphosphate, dimethylphosphate, diphenylphosphinic, di-n-octylphosphate, and dibutyl phosphinic; wherein M is selected from silicon, germanium, or tin; M' is boron; and Q is alkyl of 1-11 carbons, phenyl, benzyl, or cyclohexyl; b. when n is 2, R is selected from any of the radicals listed under (a) and R' is selected from the group consisting of carbonyl, alkylidene, of 2-20 carbons, cycloalkylidene of 3-2 carbons, di-tert-alkylene of 6-20 carbons, di-tert-cycloalkylene of 6-20 carbons, di-tert-aralkylene of 12-20 carbons, Q 2 M<, QM'< wherein M is selected from silicon, germanium or tin; M' is boron; and Q is alkyl of 1-11 carbons, phenyl, benzyl, or cyclohexyl; c. when n is 3, R is selected from any of the radicals listed under (a) and R' is selected from the group consisting of tert-aralkyl-di-tert-aralkylene of 15-20 carbons, tert-alkylalkylidene of 4-20 carbons, tert-cycloalkylalkylidene of 4-20 carbons, tert-alkylcycloalkylidene of 4-20 carbons, tert-cycloalkylcycloalkylidene of 6-20 carbons, tert-alkyl-di-tert-alkylene of 10-19 carbons, tert-alkyl-di-tert-cycloalkylene of 10-19 carbons, tert-cycloalkyl-di-tert-alkylene of 10-19 carbons, tert-cycloalkyl-di-tert-cycloalkylene of 10-19 carbons, and QM.tbd.wherein M is selected from silicon, germanium or tin; and Q is selected from alkyl of 1-11 carbons, phenyl, benzyl or cyclohexyl; d. when n is 4, R is selected from any of the radicals listed under (a) and R' is dialkylidene of 5-16 carbons; e. only one of R and R' can be hydrogen; and f. at least one of R and R' contains an ultraviolet light stabilizing radical of a compound selected from the group consisting of ##STR39## wherein R 6 is alkyl of 1-6 carbon atoms.