| 摘要 |
PROBLEM TO BE SOLVED: To provide a rigid urethane resin composition capable of being cured within a short time at ordinary temperature to give a cured film excellent not only in chemical resistance, water resistance, and impact resistance but also in surface gloss, load-withstanding properties, crack coverage, and abrasion resistance. SOLUTION: This composition comprises (a) an isocyanato-terminated prepolymer, (b) a compound containing a castor oil polyol, and (c) aluminum oxide having a BET specific surface area of at least 100 m2/g.
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