Patent ID: 6592973
Filing Date: 2003-07-15
Classification: G06K,H01L,H05K,Y10S,Y10T

Abstract:
A card sealed by a composition which consists essentially of:(A) an acrylate compound polymerizable by an ionizing radiation, the acrylate compound consists essentially of at least one of acrylate prepolymers having a weight-average molecular weight in the range of 500 to 100,000 selected from the group consisting of (a) prepolymers of polyester acrylates, (b) prepolymers of epoxyacrylates, (c) urethane acrylates, and (d) polyol acrylates; (B) 1 to 40 parts by weight of a polyfunctional isocyanate compound per 100 parts by weight of said acrylate compound; and (C) a photopolymerization initiator, the composition being cured by irradiation of the ionizing radiation after sealing.