Patent ID: 7781494

Claim:
An active energy curing type composition for an in-place shaping gasket, comprising the under-mentioned components (A) and (B) as essential components, wherein the viscosity of the composition is 400 Pa·s or less at 23° C. and the compression set (obtained by a procedure wherein strain after compressed by 25% at 150° C. for 70 hours is measured and the strain which is not restored after the release of compression is expressed in terms of percentage, provided that the quantity of compression applied is 100%) of a cured article which is prescribed in JIS K 6262 is 30% or less (A) a vinyl polymer having two or more groups represented by general formula (1): —OC(O)C(R a )═CH 2 (1) wherein R a represents a hydrogen atom or an organic group having 1 to 20 carbon atoms, per molecule at the molecular ends (B) a vinyl polymer having one group represented by general formula (1) per molecule at the molecular end.