Active energy curable site molded gasket for composition and site molded gasket

摘要

To provide an active energy ray curable site molded gasket composition having excellent curability can be provided on-site forming gasket excellent in heat resistance, weather resistance, oil resistance, curability, and compression set. Compression set which contains as essential components the following component (A), component (B) is defined in JIS K 6262 of the cured product when the formulation viscosity is cured and at 400Pa · s or less at 23 ℃ There active energy ray curable situ molded gasket composition of 30% or less. Vinyl polymer 2 or more per molecule, the molecule end (A) and (meth) acryloyl group. Per molecule, a vinyl polymer having a molecular end (B) and (meth) acryloyl group.