摘要： 基于树脂的结构设计和涂料配方的优化,制备了固含量为70%的高固体分氟碳防腐蚀涂料。涂料和涂膜的性能测试结果显示,随熟化时间延长,涂膜的拉升强度逐渐升高至约9 MPa,断裂伸长率则无明显变化;随柔性固化剂用量提高,涂膜附着力下降,断裂伸长率升高;聚硅氧烷类消泡剂的加入明显提高了涂料密度;涂料最大湿膜厚度随气相白炭黑加入量的提高而变大,白炭黑添加量为总质量1%时效果最佳。优化后的高固体分氟碳涂料表干时间≤2 h,实干时间≤24 h,附着力≥6 MPa。涂料在标准状态下成膜后的拉伸强度可达10 MPa,断裂伸长率稳定高于70%。

关键词: 氟碳涂料, 高固体分, 混凝土防腐蚀

Abstract: In this study, novel fluorocarbon coatings with 70% solid content were prepare based on molecular structure design and coating formula optimization The mechanical properties of the coatings were tested in accordance with the relevant national standards. The results revealed that the tensile strength increased to 9 MPa as the curing time proceeded, while the elongation at break was stable. The adhesive strength declined as the amount of curing agent raised, while the elongation at break was the opposite. The polysiloxane defoaming agent increased the density of the coating. The maximum wet film thickness increased with the increase of fumed silica, and the optimum dosage there of was 1. 0% of the total composition. The novel fluorocarbon coatings enabled its cured film to show the dust-free time less than 2 h, the hard drying time less than 24 h, the adhesion more than 6 MPa, the elongation at break more than 70% and the tensile strength up to 10 MPa.

Key words: fluorocarbon coatings, high solid, concrete corrosion protection