Patent ID: 6749779
Filing Date: 2004-06-15
Classification: C08F,C08J,C08L,G02B,Y10T

Abstract:
A method of forming an article having a surface and an interior core, the method comprising the steps of:mixing together components comprising a dead polymer, a reactive plasticizer, an initiator to form a semi-solid polymerizable core composition; exposing the core composition to a surface-forming composition and allowing penetration and diffusion of the surface-forming composition into the core composition to form a semi-solid gradient composite material; exposing the gradient composite material to a source of polymerizing energy; and retrieving the resultant article having a surface and an interior core, wherein the composition of the core material comprises a semi-interpenetrating crosslinked polymer network of reactive plasticizer within an entangled dead polymer, and wherein the composition at the surface of the resultant article is distinct from the composition at the center of the interior core.