| 羟基型丙烯酸树脂 |
| 添加时间：2018/10/16 13:56:39 浏览次数： |
| 合成羟基型丙烯酸树脂时羟基单体的种类和用量对树脂性能有重要影响。 The type and amount of hydroxyl monomer in the synthesis of hydroxyl acrylic resin have important influence on the properties of the resin. 双组分聚氨酯体系的羟基丙烯酸组分常用伯羟基类单体：丙烯酸羟乙酯（HEA）或甲基丙烯酸羟乙酯（HEMA）； Hydroxy acrylic monomers in two-component polyurethane systems are usually primary hydroxyl monomers: hydroxyethyl acrylate (HEA) or hydroxyethyl methacrylate (HEMA). 氨基烘漆的羟基丙烯酸组分常用仲羟基类单体：丙烯酸-β-羟丙酯（HPA）或甲基丙烯酸-β-羟丙酯（HPMA）。伯羟基类单体活性较高，由其合成的羟丙树脂用作氨基烘漆的羟基组分时影响成漆贮存，可选择仲羟基丙酯单体。 Hydroxy acrylic acid components of amino baking paints are commonly used secondary hydroxyl monomers: acrylic acid-beta-hydroxypropyl ester (HPA) or methacrylic acid-beta-hydroxypropyl ester (HPMA). The hydroxypropyl resin synthesized by the hydroxypropyl resin has a higher activity. The hydroxypropyl ester monomer can be selected as the hydroxyl component of the amino baking paint. 另外，通过羟基型链转移剂 （如巯基乙醇、巯基丙醇、巯基丙酸-2-羟乙酯）可以在大分子链端引入羟基，改善羟基分布，提高硬度，并使分子量分布变窄，降低体系粘度。 In addition, hydroxyl groups can be introduced into the end of the macromolecule chain by hydroxyl chain transfer agents (such as mercaptoethanol, mercaptopropanol, Mercaptopropionic acid-2-hydroxyethyl ester), which can improve the distribution of hydroxyl groups, increase the hardness, narrow the molecular weight distribution and reduce the viscosity of the system. |
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