| 摘要 |
A method of painting a substrate having an undercoat or intermediate coat, which comprises applying to the coated substrate (1) a water-borne clear paint comprising a mixture consisting of, per 100 parts (by weight) thereof, (A) 30 to 94 parts of a vinyl copolymer having an acid value of 5 to 100, a hydroxyl value of 20 to 100, a solubility parameter ( delta sp) of 9.0 to 13.0 and a number average molecular weight of 3,000 to 50,000, and which is prepared by copolymerising an ethylenic monomer having an acid group, an ethylenic monomer having a hydroxyl group and another, copolymerisable ethylenic monomer; (B) 5 to 40 parts of a cross-linking component; and (C) 1 to 30 parts of resin particles swollen with an organic solvent having a solubility parameter of 7.5 to 13.0, the swollen resin particles having an average particle size of 0.01 to 10 mu m; and (2) (without curing the water-borne clear paint) a thermosetting clear paint comprising a mixture consisting of, per 100 parts (by weight) thereof, (D) 60 to 95 parts of a copolymer having a hydroxyl value of 20 to 100 and a solubility parameter not less than 0.3 different from that of the vinyl copolymer, and which is prepared by copolymerising an ethylenic monomer having a hydroxyl group and another, copolymerisable ethylenic monomer; and (E) 5 to 40 parts by weight of a cross-linking component. n |
