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Thermoset powder coating system material coating process for the production of powder coating systems and use of the coating and coating system
Thermoset powder coating system material coating process for the production of powder coating systems and use of the coating and coating system
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机译:热固性粉末涂料系统的材料涂覆工艺,用于生产粉末涂料系统以及该涂料和涂料系统的用途
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摘要
A powder coating is prepared by (a) solvent polymerizing carboxy-functional acrylate copolymers, (b) separating and reacting the copolymers with a molar excess of at least one epihaloalkane, (c) removing excess epihaloalkane, (d) adding toluene and then reacting the copolymers with a sodium hydroxide solution to produce epoxy groups-containing acrylate copolymers having an epoxide number of from 0.018-0.501 eq/100 g copolymer, a weight average molecular weight of from 1000-30,000 and a Tg of from 20-120 DEG C.; and (e) extruding the epoxy groups-containing acrylate copolymers with a hardener such as aliphatic polybasic acids or anhydrides, or carboxy-functional polyesters or acrylic resins along with additives such as pigments or fillers.
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