Patent ID: 7211618

Claim:
A paint composition for in-mold coating of thermoplastic plastic substrates, which is a paint composition comprising: an acryl-modified unsaturated dicarboxylic acid anhydride-grafted polyolefin (A); at least one member (B) selected from the group consisting of reactive oligomers and reactive monomers; and a radical polymerization initiator (C); in the following formulation ratio: (A)/(B)=6.5/93.5 to 60/40 (mass ratio) (C)/[(A)+(B)]=0.1/100 to 10/100 (mass ratio) wherein: the acryl-modified unsaturated dicarboxylic acid anhydride-grafted polyolefin (A) is in the range of 95 to 112° C. in melting point and in the range of 5 to 15 mass % in ratio for which unsaturated dicarboxylic acid anhydride-derived structural units account in its structure; and wherein: a polyolefin component which constitutes the acryl-modified unsaturated dicarboxylic acid anhydride-grafted polyolefin (A) is a thermally degraded polyolefin from a high-molecular polyolefin, and wherein the high-molecular polyolefin has a number-average molecular weight of 15,000 to 150,000.