C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
400/3017
C08K 5/09 (2006.01) C08G 81/02 (2006.01)
Patent
CA 1056987
Abstract of the disclosure: A thermosetting powder coating composition comprising: (A) a functional glycidyl group-containing graft copolymer of i) 10 to 40 percent of a linear polyester having a number average molecular weight of 600 to 3,000 and containing one terminal carboxyl group and ii) 60 to 90 percent of acrylic copolymer of ii-a) 6.5 to 60 percent of at least one of glycidyl esters having the formula Image wherein R1 is hydrogen or methyl, ii-b) 10 to 93.5 percent of at least one of acrylic monomers having the formula CH2=C(R2)COOR3 wherin R2 is hydrogen or methyl and R3 is alkyl having 1 to 14 carbon atoms, cyclohexyl or hydroxyalkyl having 1 to 4 carbon atoms, and ii-c) 0 to 65 percent of additional monomers selected from the group consisting of acrylonitrile. methylcrylonitrile and styrenes having the formula Image wherein R4 is hydrogen or alkyl having 1 to 4 carbon atoms, said graft copolymer having a softening point of 70 to 110° C and a number average molecular weight of 2,000 to 30,000 and containing glycidyl group in an amount of 0.35 to 2.35 moles per kilogram of the graft copolymer; and (B) at least one of polycarboxylic acids and anhydrides thereof in an amount of 0.6 to 1.2 moles in terms of carboxyl group per mole of the glycidyl group contained in the graft copolymer. - 1 -
232445
Iwasawa Naozumi
Shibata Minoru
Watanabe Tadashi
Yoshihara Ichiro
Kansai Paint Company
Na
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