高渗透性环氧树脂防水防腐涂料的制备及性能

Preparation and Performance of High Permeable Epoxy Waterproof and Anticorrosive Coating

以双酚A型环氧树脂(E51)、糠醛、丙酮、酚醛改性胺、2,4,6-三(二甲氨基甲基)苯酚(DMP-30)为主要原料,制备了一种高渗透性环氧树脂防水防腐涂料。分析了其反应机理,考察了不同成膜助剂对涂料成膜性能的影响,测试了该涂料在不同强度等级的混凝土构件表面的渗透深度及其他基本性能。结果表明,BYK-333流平剂改性后的涂料在混凝土表面具有良好的成膜性,在干基面、潮湿基面的粘接强度分别达到4.5、3.6 MPa,在C30混凝土表面的最大渗透深度可达5 mm,具有良好的耐化学介质性。

A permeable epoxy coating was prepared through a combination of bisphenol-A epoxy resin(E51),furfural,acetone phenolic modified amine,2,4,6-tris(dimethylaminomethyl)phenol(DMP-30)and other additives,and its reaction mechanism was analyzed.The influence of different additives on the film-forming ability of the coating was discussed.The depth of penetration to the surface of concretes with different strength grades along with other basic properties was also investigated.The results indicated that the BYK-333-modified coating exhibited an optimum film-forming ability and good permeability.The coating achieved bonding strength of 4.5 and 3.6 MPa on the dry base concrete surface and the wet base concrete surface,respectively.Moreover,the coating gained a maximum penetration depth of 5 mm on the C30 concrete surface,indicating good chemical resistance.