Powder coating composition and coated article
A powder coating composition comprising a specific organosilicon compound forms a coating which exhibits satisfactory water-loading resistant performance.
1. A powder coating composition comprising
(A) an organosilicon compound having the general formula (1):
wherein R 1 is each independently a C 1 -C 10 alkyl or C 6 -C 10 aryl group, R 2 is each independently a C 1 -C 10 alkyl or C 6 -C 10 aryl group, A is a C 1 -C 20 divalent hydrocarbon group, B is a C 1 -C 20 divalent hydrocarbon group, and m is an integer of 1 to 3, and
(B) a resin selected from the group consisting of epoxy resins, polyester resins, epoxy-polyester resins, acrylic resins, fluoro-resins, and silicone resins,
wherein the organosilicon compound is contained in an amount of 0.1 to 5 parts by weight, provided that the powder coating composition is 100 parts by weight.
2. The powder coating composition of claim 1 wherein the organosilicon compound has the general formula (2):
wherein R 1 , R 2 , and m are as defined above.
3. The powder coating composition of claim 1 , wherein resin component (B) comprises a carboxyl-containing polyester resin.
4. The powder coating composition of claim 1 , further comprising (C) a β-hydroxyalkylamide compound.
5. A coated article obtained by coating a substrate with the powder coating composition of claim 1 .