Thermosetting powder coating composition
AssigneeDaikin Industries, Ltd.
InventorsNobuhiko Tsuda, Ryoichi Fukagawa, Keisuke Tano, Daisuke Tanizawa
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Abstract
There is provided a thermosetting powder coating composition comprising (A1) a fluorine-containing copolymer and (B) a curing agent, in which the copolymer contains, as essential structural units, a fluoroolefin unit, an alkene unit and cyclohexyl vinyl ether unit and/or p-tertiary butyl vinyl benzoate unit, has a sum of cyclohexyl vinyl ether unit and p-tertiary butyl vinyl benzoate unit of from 5 to 45% by mole, has a thermal transition temperature of from 45° to 120° C. and has a crosslinkable reaction group. The thermosetting powder coating composition is excellent in storage stability and provides a coating film possessing a smooth surface and enhanced impact resistance.
Claims10
A thermosetting powder coating composition comprising (A1) a fluorine-containing copolymer and (B) a curing agent, in which said copolymer contains, as essential structural units, a fluoroolefin unit, an alkene unit and p-tertiary butyl vinyl benzoate unit, has the p-tertiary butyl vinyl benzoate unit in an amount of from 5 to 20% by mole, has a thermal transition temperature of from 45° to 120° C. and has a crosslinkable reaction group.
A fluorine-containing copolymer comprising from 10 to 55% by mole of fluoroolefin unit, from 1 to 45% by mole of alkene unit, from 5 to 20% by mole of p-tertiary butyl vinyl benzoate unit, from 1 to 20% by mole of structural unit having a crosslinkable reaction group and from 0 to 30% by mole of structural unit other than said units, wherein the copolymer has a thermal transition temperature of from 45°to 120° C.
Dependencies are inferred from the claim text.