Patent ID: 8648162

Claim:
An adherence substance which is obtained by curing a curable composition comprising a silyl group-containing polymer (S) obtained by introducing hydrolyzable silyl groups to from 80 to 100 mol % of molecular terminals of a polyurethane prepolymer obtained by reacting a polyol compound with a polyisocyanate compound, and which has a peel adhesive strength of at most 8N/25 mm as measured in accordance with the 180° peeling method as defined in JIS Z-0237 (1991)-8.3.1, wherein said polyurethane prepolymer has a number average molecular weight of from 2,000 to 100,000 and a molar ratio of a total amount (MU) of urethane bonds and urea bonds to an amount (MS) of hydrolysable silyl groups (MU)/(MS) in said silyl group containing polymer (S) is from 2/1 to 100/1.