申请人:Cytec Surface Specialties, S.A.
公开号:EP2272927A1
公开(公告)日:2011-01-12
The present invention relates to a powder coating composition for low temperature cure which comprises a mixture of a carboxylic acid group containing first polyester; at least one of a second polyester having a glass transition temperature ≤ 45°C and/or a crystalline polycarboxylic acid; a glycidyl group containing acrylic copolymer; a further compound and/ or resin having functional groups reactable with the carboxylic acid groups; and a thermosetting curing catalyst.
These thermosetting powder coatings are designed for coating heat-sensitive substrates such as wood, fibre board and other materials which can not withstand the excessive heat/time conditions necessary to cure traditional coatings. The powder coatings of the invention, when cured at temperatures below 150°C, produce a finish which exhibits a high gloss, smooth surface along with an outstanding hardness and weatherability.
本发明涉及一种用于低温固化的粉末涂料组合物,它由以下物质的混合物组成:含羧酸基团的第一种聚酯;玻璃化温度≤45℃的第二种聚酯和/或结晶聚羧酸中的至少一种;含缩水甘油基团的丙烯酸共聚物;具有可与羧酸基团反应的官能团的另一种化合物和/或树脂;以及热固性固化催化剂。
这些热固性粉末涂料设计用于涂覆对热敏感的基材,如木材、纤维板和其他无法承受传统涂料固化所需的过热/过长固化时间的材料。本发明的粉末涂料在低于 150°C 的温度下固化时,可产生高光泽、光滑的表面以及出色的硬度和耐候性。