Patent ID: 9737637
Date: 2017-08-22
CPC Classifications: A61L

Claim:
1. A process for obtaining a coating comprised of a functional oligomer or polymer covalently linked to a polymerized supporting polymer, the process comprising subjecting a coating composition comprising a supporting monomer, oligomer or polymer; a functional oligomer or polymer; and a photoinitiator to photopolymerization conditions sufficient to covalently link the functional polymer or oligomer to the polymerized supporting polymer, wherein the photoinitiator in the coating composition consists of one or more Norrish type 1photoinitiators that are not bound to the supporting monomer, oligomer or polymer or to the functional polymer or oligomer, and wherein the one or more photoinitiators (i) initiate polymerization of the supporting monomer, oligomer or polymer in a photoinitiation reaction to produce the polymerized supporting polymer, (ii) become bound to the supporting monomer, oligomer or polymer via initiation of polymerization of the supporting monomer, oligomer or polymer, and thereafter (iii) induce polymer cross-links between the supporting monomer, oligomer or polymer and the functional oligomer or polymer through a hydrogen abstraction mechanism when the one or more photoinitiators are bound to the supporting monomer, oligomer or polymer via initiation of polymerization of the supporting monomer, oligomer or polymer.