| 摘要 |
Z/PV 35027Z "Fluorocarbon Powder Coating Compositions" A powder coating composition substantially free of organic solvent and water, the coating composition containing a thermosetting polymeric binder comprising: a) a hydroxyl functional fluorocarbon copolymer of copolymerised monomers comprisisng hydroxy alkyl vinyl ether and fluorolefin, where the fluorocarbon copolymer contains between 1 and 30 mole percent hydroxy alkyl vinyl ether, the fluorocarbon polymer being produced by copolymerising the monomers in the absence of water; b) a blocked isocyanate which is adapted to co-react with and crosslink the functional fluorocarbon copolymer (a) upon heat curing the coating; c) a hydroxyl functional polymer adapted to co-react with the blocked isocyanate (b) which is a hydroxyl functional acrylic copolymer or a hydroxyl functional polyester polymer, the binder comprising on a weight basis between 20% and 86% functional fluorocarbon copolymer (a), up to 60% hydroxyl functional polymer (c) and between 10% and 40% blocked isocyanate (b).
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