REACTION-CURABLE POLYURETHANE RESIN COMPOSITION AND TWO-PART REACTION-CURABLE POLYURETHANE ADHESIVE MADE BY USING THE SAME

摘要

[PROBLEMS] To provide a reaction-curable polyurethane resin composition which is extremely excellent in liquid storage stability (both homogeneity and reactivity) and in reactivity (uniformity of reaction) and a solventless, two-pack, reaction-curable polyurethane adhesive composed of "a base resin" and "a curing agent" which are based on the constituents of the composition. [MEANS FOR SOLVING PROBLEMS] The above problems can be solved by selecting and using a specific catalyst, by selecting and using a polymeric MDI having an acidity above a specific level as the organic polyisocyanate, and by specifying the equivalent ratio of isocyanato of the organic polyisocyanate to hydroxyl of castor oil polyol (A).