| 摘要 |
PROBLEM TO BE SOLVED: To obtain a curable coating material composition whereby a coating film which long potlife, improved workability, high level balance of acid resistance and excoriation resistance and excellent flexibility and adhesion in recoating is obtained even if it has an isocyanate curable property. SOLUTION: The curable resin composition contains, as essential components, (A) 0.5-80 pts.wt. curable oligomer of obtained by using a low-lactone modified hydroxyalkyl (meth)acrylic ester composition wherein the ratio of a monomer having 2 or more lactone chains (n>=2) is less than 50% and which is obtained by the formula [wherein R, R1, R2 and R3 are independently H or methyl group; (j) is an integer of 2-6; R4 and R5 of each xn pieces are independently H or a 1-12C alkyl group; (x) is 4-7; (n) is 0 or an integer of 1 or above; the average value of (n) in the composition is 0.3 or more and less than 1.0] and (B) 0.5-50 pts.wt. polyisocyanate compound.
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