C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
117/145, 400/421
C08K 3/30 (2006.01) B32B 7/02 (2006.01) C08K 3/34 (2006.01) C09D 3/52 (1985.01)
Patent
CA 1207485
ABSTRACT OF THE DISCLOSURE A coating composition forming coated films having an excellent chipping resistance, containing: A. at least one polyester resin derived from (1) at least one acid component selected from the group consisting of dibasic acids and the esters and the ester-forming derivatives thereof and (2) at least one alcohol component selected from the group consisting of polyhydric alcohols and the ester-forming derivatives thereof; and B. at least one aminoplast resin having a number-average molecular weight of 800 to 1400, said polyester resin containing at least 20% by weight, based on the total amount of the acid component, of an aliphatic dibasic acid having 4 to 10 carbon atoms and at least 20% by weight, based on the total amount of the alcohol component, of a dihydric alcohol having 2 to 6 carbon atoms, a polyester resin having a number-average molecular weight of 2000 to 4000, a hydroxyl number of 30 to 75 and an acid number of 5 to 15. The weight ratio, in terms of solid content, of the polyester resin to the aminoplast resin is 60/40 to 95/5. The coated film of said coating composition has an elongation of 20% to 100% and a static glass transition temperature of -10°C to 20°C. This coating composition optionally contains 2% to 20% by weight, based on the total solid amount of the coating composition, of ultrafine talc powder, 2% to 40% by weight, based on the total solid amount of the coating composition, of ultrafine barium sulfate powder or 2% to 40% by weight, based on the total solid amount of the coating composition, of a mixture of ultrafine talc and ultrafine barium sulfate.
409453
Iwato Susumu
Kurauchi Takeo
Nakamura Tatuo
Borden Ladner Gervais Llp
Nippon Paint Co. Ltd.
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