| abstract |
The present invention provides a highly weather resistant elastic adhesive having an appropriate elongation and hardness and excellent weather resistance. An elastic adhesive comprising (A) an acrylic polymer having a blocked hydroxyl group and (B) an isocyanate prepolymer, wherein (A) the acrylic polymer has a blocked hydroxyl group content of 1 to 5 mol / kg resin, The weight average molecular weight is 10,000 to 100,000, and the glass transition temperature is 10 to 40 ° C. Preferably, the ratio of hydroxyl groups in (A) acrylic polymer to isocyanate groups in (B) isocyanate prepolymer (hydroxyl group / Isocyanate group) is 0.8 to 1.3, a high weather resistance elastic adhesive. [Selection figure] None |