羟基磷酸酯共聚苯丙乳液的合成及其防腐性能研究

Study on Synthesis of styrene-acrylic emulsion with Hydroxyl phosphate and its anti-corrosion properties

摘要:

地温条件下，用甲基丙烯酸缩水甘油酯(GMA)和磷酸，制备一种羟基磷酸酯功能单体，将其与丙烯酸酯类单体共聚制备一种功能性苯丙防锈乳液，并对该改性苯丙乳液及其涂膜进行性能测试和采用IR、SEM、Tafel和粒径分析进行表征。结果表明，所制备的乳液反应体系稳定，乳液粒径约为100nm，粒径分布均匀并具有窄分布的特点，当用量为4%时，其漆膜的耐水性及耐盐雾性能达到最佳，无闪蚀现象，腐蚀电流较小，为1.376×10-8A，说明涂层的耐腐蚀能力较强。

Abstract:

The hydroxyl phosphate as a functional monomer was synthesized by GMA and phosphoric acid at a low temperature, followed copolymerization with acrylic monomers to prepare a styrene-acrylic emulsion. The modified styrene-acrylic emulsion were characterized by IR、SEM, Tafel and particle size analysis and the performance of its film was tested . The results showed, the waterborne anti-corrosion emulsion reaction system was stabile and the particle diameter of emulsion is about 100nm having relatively narrow distribution. When the dosage of hydroxyl phosphate was 4%，the coating was prepared by the emulsion with the best corrosion resistance and overall performance, without flash-rust resistant appearance. The corrosion current of the paint film was 1.376×10-8A, which is better than the commericial waterborne anti-corrosion coating film on the anti-corrosion properties.