Patent ID: 7989573
Filing Date: 2011-08-02
Classification: C08F

Abstract:
1. A method of free radically polymerizing vinyl monomers comprising: (a) providing a non-heterogeneous mixture comprising: wherein R is a C 9 -C 18 alkyl group, in a batch reactor, wherein the non-heterogeneous mixture of step (a) further comprises a solvent miscible in the non-heterogeneous mixture, wherein the solvent miscible in the non-heterogeneous mixture of step (a) is present in the non-heterogeneous mixture in an amount less than 20% by weight based on the total weight of the non-heterogeneous mixture of step (a); (b) deoxygenating the non-heterogeneous mixture if the mixture is not already deoxygenated; (c) heating the non-heterogeneous mixture to a sufficient temperature to generate sufficient initiator radicals from at least one thermal free radical initiator so as to initiate polymerization; (d) allowing the non-heterogeneous mixture to polymerize under essentially adiabatic conditions to yield an at least partially polymerized non-heterogeneous mixture; (e) adding additionally to the at least partially polymerized non-heterogeneous mixture at least one thermal free radical initiator; (f) deoxygenating the partially polymerized non-heterogeneous mixture if the mixture is not already deoxygenated; and (g) allowing the partially polymerized non-heterogeneous mixture to further polymerize under essentially adiabatic conditions to yield a further polymerized non-heterogeneous mixture; wherein an additional scavenger monomer selected from the group consisting of: wherein R is a C 9 -C 18 alkyl group, is added additionally to the at least partially polymerized non-heterogeneous mixture of step (d).