Polyurethane resin-forming compositions, adhesive compositions, cured products and adhesives

Abstract

To provide a polyurethane resin formative composition capable of exhibiting high adhesive strength in a wide temperature range, a composition for an adhesive, a cured product and an adhesive article.SOLUTION: A polyurethane resin formative composition contains a curing agent (A) containing diol (a-1) and a crosslinking component (a-2), and an isocyanate group terminal prepolymer (B) that is a reaction product of polyol (b-1) having Mn of 2,500 or more, polyisocyanate (b-2) and diol (b-3) having Mn of 250-2,000 as an arbitrary component. The diol (a-1) is one or more selected from the group consisting of linear or branched aliphatic diol, alicyclic diol and aromatic diol that have Mn in a specific range. Contents and ratios of the diol (a-1) and the polyol (b-1) are in specific ranges. A content of a crosslinkable group that the crosslinking component (a-2) has is in a specific range. Contents and ratios of an OH group, an NCO group and an urethane group in the polyurethane resin formative composition are in specific ranges.SELECTED DRAWING: None

Images