| 降低了熔融涂层的粘度，涂膜流动平整，可以达到溶剂型涂膜的流平程度。自封闭的IPDI聚合物不存在挥发的问题，涂膜流平一般。BF1540官能度小于2其反应活性低，固化物交联密度不高，涂膜机械强度和耐溶剂等耐化学性能不太好。 Reduce the viscosity of molten coating, coating flow leveling, leveling degree can reach the solvent type coating. Does not exist volatilization problems since the IPDI polymer coating leveling closed, general. BF1540 functionality to less than 2 of its low reactivity, curing crosslinking density is not high, the coating mechanical strength and solvent resistance and chemical performance is not too good. 主要用于耐高温（＞200℃）粉末涂料，耐热粉末涂料最常用的一种树脂。粉末涂料用硅树脂是高分子聚合物，含有甲基和（或）苯基取代基团。工业上合成硅树脂的单体是下列甲基和苯基取代硅烷：Me3SiCl三甲基氯硅烷 Mainly used for high temperature (higher than 200 deg.C) powder coating, a kind of the most commonly used heat resistant powder coating resin. Powder coating with silicone polymers, containing methyl and (or) phenyl substituents. The industrial synthesis of monomer silicone resin is the methyl and phenyl substituted silanes: Me3SiCl three methyl chlorosilane Ph2SiCl2二苯基二氯硅烷 PhSiMeCl2苯基甲基二氯硅烷 Me2SiCl2二甲基二氯硅烷 PhSiCl3苯基三氯硅烷 MeSiCl3甲基三氯硅烷 Me=甲基 Ph=苯基 有机硅树脂主要是以二氯硅烷和三氯硅烷混合物水解而形成硅烷醇混合物缩聚而成， Ph2SiCl2 two phenyl two chlorosilanes methyl phenyl chlorosilane PhSiMeCl2 two Me2SiCl2 two methyl two phenyl chlorine silane PhSiCl3 three chloro silane MeSiCl3 three methyl chlorosilane Me= methyl Ph= phenyl silicone resin is mainly by two chlorosilane and three chloro silane mixture hydrolysis and the formation of silanol condensation polymerization mixture, 三氯硅烷用以提供支链化。缩聚反应中剩余的未反应的硅醇基在以后的成膜时发生缩合或与其它聚合物进行交联反应。有机硅树脂中甲基与苯基的比例决定树脂的性能， Three chloro silane is used to provide the branched. The unreacted silanol condensation reaction of the remaining film after the condensation or with other polymer cross-linking reaction. Methyl phenyl silicone resin and the proportion of resin performance decision, 这种比例与树脂性能的关系见表：有机硅树脂中甲基与苯基的比例与树脂性能的关系高甲基有机硅树脂 高苯基有机硅树脂 固化时较低重量损耗较快固化速度较高耐紫外线稳定性较低温度柔韧性与其它树脂有较低的相容性 固化时较大重量损耗较长贮存稳定性较高热稳定性较大耐氧化性与其它树脂有较高的相容性 The relationship between the ratio and the properties of the resin curing silicone resin table: relationship between Gao Jiaji silicone resin high phenyl methyl and phenyl silicone resin and resin properties in the proportion of relatively low weight loss and fast curing speed of UV resistant stability of high low temperature flexibility and other resin had lower compatibility curing greater weight loss long storage stability high thermal stability of larger resistance to compatibility with other resins with high oxidative 有机硅树脂可单独用来生产粉末涂料，对耐温要求不太高的粉末涂料可使用苯基/甲基树脂比较高的有机硅树脂与其它树脂共混的方法制作，生产时需要选用耐热性好的颜填料。目前应用最多的不饱和聚酯树脂、或使涂膜形成纹理的资料。 Silicone resin alone can be used in the production of powder coating, powder coating on the temperature is not too high production method using phenyl / methyl resin high silicone resin and other resin blends, production of pigments and fillers need to choose good heat resistance. At present, most of the application of unsaturated polyester resin, or make the film forming texture data. 助剂是起辅助作用的资料，其种类和品种繁多，选用时一定要注意各助剂产生的作用，切不可乱用和滥用，使配方做到简单有效。粉末涂料的助剂大约分以下几种：⑴．流平剂 粉末涂料使用的流平剂是低表面张力的丙烯酸聚合物。 AIDS is a supplementary role information, the types and varieties, attention must be paid to the selection of the auxiliary effect, must not be indiscriminate use and abuse, to do simple and effective formula. Powder coatings additives roughly divided into the following: 1. The leveling agent used powder coating leveling agent is acrylic polymer with low surface tension.更多资讯http://www.zktb3.com |
