Coating composition and coat article coated therewith

1. A coating composition consisting essentially of, with respect to (1) 100 parts by weight of epoxy-group contained polyester modified vinyl polymer (D) obtained by copolymerization of a vinyl monomer (A) containing an alicyclic epoxy group and a vinyl monomer (B) containing polyester in a side chain, (2) 0.01 to 10 parts by weight of an organic metal compound, and (3) 0.1 to 10 parts by weight of a silicon compound,

wherein the silicon compound is triphenylsilanol and/or diphenylsilanediol,

wherein the vinyl monomer (B) containing polyester in the side chain is 30 to 55 parts by weight of with respect to 100 parts by weight of the alicyclic-epoxy-group contained polyester modified vinyl polymer (D),

wherein the vinyl monomer (B) is acquired by a ring opening reaction of ε-caprolactone with hydroxyl group contained acrylic ester, and contains polyester in a side chain with the ε-caprolactone having an average chain number of not less than 5 mol and not more than 10 mol, wherein the epoxy-group contained polyester modified vinyl polymer (D) has a glass transition point of −60 to 20° C.

2. The coating composition according to claim 1 , wherein the silicon compound is triphenylsilanol.

3. The coating composition according to claim 1 , wherein the epoxy-group contained polyester modified vinyl polymer (D) includes a vinyl monomer (C) polymerizable with the monomer (A) and the monomer (B).

4. The coating composition according to claim 3 , wherein there are 1 to 50 parts by weight of the vinyl monomer (C) with respect to 100 parts by weight of the alicyclic-epoxy-group contained polyester modified vinyl polymer (D).

5. The coating composition according to claim 1 , wherein hydroxyl-group contained acrylic ester is hydroxyalkyl(meta)acrylate.

6. The coating composition according to claim 5 , wherein the alkyl is ethyl, butyl or propyl.

7. The coating composition according to claim 1 , wherein the epoxy-group contained polyester modified vinyl polymer (D) has a number-average molecular weight of 1000 to 40000.

8. The coating composition according to claim 1 , wherein there are 1 to 5 parts by weight of the organic metal compound with respect to 100 parts by weight of the alicyclic-epoxy-group contained polyester modified vinyl polymer (D).

9. The coating composition according to claim 1 , wherein there are 1 to 5 parts by weight of the silicon compound having the silanol group with respect to 100 parts by weight of the alicyclic-epoxy-group contained polyester modified vinyl polymer (D).

10. The coating composition according to claim 1 , further including 0.1 to 10 parts by weight of a compound having a hydrolytic silyl group with respect to 100 parts by weight of the alicyclic-epoxy-group contained polyester modified vinyl polymer (D).

11. The coating composition according to claim 1 , further including a ligand of the organic metal compound.

12. A plastic coat article having the coating composition as specified in claim 1 coated directly or via a base coat.

13. The plastic coat article according to claim 12 , wherein the plastic is a polycarbonate resin, an ABS resin, an acrylic resin or a resin alloy containing the same.

14. A coating composition consisting essentially of, with respect to (1) 100 parts by weight of epoxy-group contained polyester modified vinyl polymer (D) obtained by copolymerization of a vinyl monomer (A) containing an alicyclic epoxy group and a vinyl monomer (B) containing polyester in a side chain, (2) 0.01 to 10 parts by weight of an organic metal compound, and (3) 0.1 to 10 parts by weight of a silicon compound having a silanol group and not including siloxane bonding,

wherein the silicon compound is triphenylsilanol and/or diphenylsilanediol,

wherein the vinyl monomer (B) containing polyester in the side chain is 30 to 55 parts by weight of with respect to 100 parts by weight of the alicyclic-epoxy-group contained polyester modified vinyl polymer (D),

wherein the vinyl monomer (B) is acquired by a ring opening reaction of ε-caprolactone with hydroxyl-group contained acrylic ester, and contains polyester in a side chain with the ε-caprolactone having an average chain number of not less than 5 mol and not more than 10 mol, and

further including 0.01 to 10 parts by weight of an ultraviolet absorber with respect to 100 parts by weight of the alicyclic-epoxy-group contained polyester modified vinyl polymer (D),

wherein the epoxy-group contained polyester modified vinyl polymer (D) has a glass transition point of −60 to 20° C.

15. The coating composition according to claim 14 , wherein the silicon compound is triphenylsilanol.

16. The coating composition according to claim 14 , further including 0.01 to 10 parts by weight of a light stabilizer with respect to 100 parts by weight of the alicyclic-epoxy-group contained polyester modified vinyl polymer (D).