URETHANE-BASED SEALANT COMPOSITION SUITABLE FOR TOPCOATING SPECIFICATION AND METHOD FOR IMPROVING ADHESIVENESS OF COATING FILM OF TOPCOATING MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a urethane-based sealant composition suitable for topcoating specifications having good adhesiveness of the coating film of a coating material top-coated on the surface of a cured product and further the water-resistant adhesiveness of a topcoating film even in the case of the long curing period of a curing composition containing an isocyanate group-containing urethane prepolymer, and a method for improving the adhesiveness of topcoating materials.

SOLUTION: A curable composition comprising an isocyanate group-containing urethane prepolymer and an oxygen-curable unsaturated compound is mixed with carbon black.

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