Patent ID: 6346300
Filing Date: 2002-02-12
Classification: C08F,C08L,C09K

Abstract:
A process for applying a seal to an article comprising the steps ofA) mixing at a temperature of between 25Â° C. and 250Â° C. a composition comprising: 1) 75 to 95 weight percent of an elastomer selected from the group consisting of a) copolymers comprising ethylene and a comonomer selected from the group consisting of C1-C8 alkyl esters of acrylic acid, C1-C8 alkyl esters of methacrylic acid, and vinyl esters of C2-C8 carboxylic acids; b) alkyl acrylate polymers selected from the group consisting of homopolymers of C1-C10 alkyl acrylates and copolymers of C1-C10 alkyl acrylates with up to 40 weight percent monovinyl monomers; and c) diene copolymers selected from the group consisting of copolymers of a diene and an unsaturated nitrile and hydrogenated copolymers of a diene and an unsaturated nitrile; 2) 2 to 24 weight percent of a multifunctional crosslinking agent selected from the group consisting of multifunctional acrylic crosslinking agents, multifunctional methacrylic crosslinking agents, multifunctional cyanurate crosslinking agents, and multifunctional isocyanurate crosslinking agents; and 3) 0.2 to 5.0 weight percent of a UV initiator wherein the weight percentages of each of 1), 2), and 3) are based on the combined weight of 1), 2), and 3), to form a thermally stable, curable, extrudable mixture; B) depositing said extrudable mixture on said article in the shape and thickness desired to form an uncured seal; and C) irradiating said uncured seal with UV radiation for a time sufficient to cure said seal by reaction of said elastomer with said multifunctional crosslinking agent to form interchain and intrachain crosslinks.