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以聚己内酯、新戊二醇与顺丁烯二酸酐合成了聚酯树脂,然后与六亚甲基二异氰酸酯(HDI)反应以提高支化度,引入有机硅后再同丙烯酸单体反应制得丙烯酸改性聚酯树脂。以此丙烯酸改性聚酯树脂和适量的颜填料为甲组分、拜耳3390固化剂为乙组分,开发了适用于海洋气候的钢结构表面防护涂层。研究了顺丁烯二酸酐含量、丙烯酸改性聚酯树脂羟基含量、n(─NCO)∶n(─OH)值和聚合条件对面漆性能的影响。当顺丁烯二酸酐的用量为聚酯树脂的5%,自制的丙烯酸改性聚酯树脂羟基含量为4.5%±0.3%,n(─NCO)∶n(─OH)=1.1~1.4时,所制备的丙烯酸改性聚酯树脂面漆配以环氧富锌底漆及环氧云母氧化铁中涂漆得到的涂层体系能够满足海上平台钢结构的防护要求。
Polyester resin was synthesized with polycaprolactone, neopentyl glycol and maleic anhydride, and then reacted with hexamethylene diisocyanate (HDI) to increase the degree of branching. After the silicone was introduced, it was reacted with acrylic acid monomer An acrylic modified polyester resin was obtained. With this acrylic modified polyester resin and the appropriate amount of pigments and fillers as a component, Bayer 3390 curing agent for the B component, developed for the marine climate steel surface protective coating. The effects of maleic anhydride content, hydroxyl content of acrylic acid - modified polyester resin, n (─ NCO): n (-OH) value and polymerization conditions on the properties of top coat were investigated. When the content of maleic anhydride is 5% of the polyester resin, the content of hydroxyl groups of the homemade acrylic modified polyester resin is 4.5% ± 0.3% and n (─NCO): n (─OH) = 1.1-1.4, The prepared coating system of acrylic modified polyester resin topcoat with zinc-rich epoxy primer and epoxy mica iron oxide can meet the protection requirements of offshore platform steel structure.