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首页> 外文期刊>Journal of coatings technology and research >Rheological studies of the cure of epoxy/polyester powder coatings containing titanium dioxide
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Rheological studies of the cure of epoxy/polyester powder coatings containing titanium dioxide

机译：含二氧化钛的环氧/聚酯粉末涂料固化的流变学研究

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摘要

The cure characteristics of a series of powder coatings containing titanium dioxide dispersed in an epoxy/polyester matrix are reported. The titanium dioxide pigments were produced via both the chloride and sulfate routes and coated with varying amounts of alumina and silica. Comparison data for formulations containing zinc oxide and silica are also included. The time to gelation for these powder coatings depends on a number of factors. Increasing the level of flow agent significantly reduces the time to gelation. The presence of traces of zinc inhibits cure in the case of the sulfate-based pigments. Varying levels of alumina and silica in the coating on the titanium dioxide coating also influence the time to gelation. Increasing the level of silica on the chloride-based coating increases the time to gelation, whereas in the case of the sulfate based coating the time to gelation is shortened. These differences are attributed to the effects of zinc in the coating and the effectiveness of the dicyandiamide catalysts.
机译：报道了一系列分散在环氧/聚酯基体中的含二氧化钛的粉末涂料的固化特性。二氧化钛颜料是通过氯化物和硫酸盐两种途径生产的，并涂覆有不同数量的氧化铝和二氧化硅。还包括含氧化锌和二氧化硅的配方的比较数据。这些粉末涂料的胶凝时间取决于许多因素。增加流动剂的含量可显着缩短胶凝时间。在硫酸盐基颜料的情况下，微量锌的存在会抑制固化。二氧化钛涂层上涂层中氧化铝和二氧化硅含量的变化也会影响胶凝时间。增加氯化物基涂层上二氧化硅的含量会增加胶凝时间，而在硫酸盐基涂层的情况下，胶凝时间会缩短。这些差异归因于涂层中锌的作用和双氰胺催化剂的有效性。

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