| 摘要 |
In a heat-curable coating composition containing an oil-free polyester resin and an aminoaldehyde resin as binder components, the improvement wherein (A) the materials for said oil-free polyester resin contain 40 to 75% by weight, based on the total weight of said materials, of at least one polyester-forming compound selected from the group consisting of (a) an aliphatic dibasic acid represented by the formula HOOC-CH2-nCOOH wherein n is an integer of 4 to 10 as a polybasic acid, (b) an aliphatic glycol represented by the formula HO-CH2-nOH wherein n is an integer of 4 to 10 as a polyhydric alcohol, and (c) a lactone represented by the formula <IMAGE> wherein n is an integer of 4 to 10, (B) the entire polybasic acid components of the polyester resin contain at least 10%, based on the total weight of said polybasic acid components, of an alicyclic polybasic acid or its anhydride, and (C) the polyester resin has a hydroxyl value of 20 to 95.
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