磷酸酯改性苯丙接枝环氧树脂胶乳的制备及其防腐蚀性能

Preparation of Organic Phosphate Modified Styrene-Acrylate Grafted Epoxy Resins Latex and Its Anti-Corrosion Property

采用乳液聚合方法制备了一种用于水性金属防腐蚀涂料的磷酸酯改性苯丙接枝环氧树脂胶乳,其中环氧树脂占胶乳固体含量30%,磷酸酯占胶乳固体含量1.2%。制备的胶乳可室温交联固化。采用透射电镜表征了胶乳的形貌,红外光谱表征胶乳的结构,偏光显微镜研究金属的闪锈行为,拉开法测定附着力。结果表明:胶乳粒子呈现规则的球型形貌,粒径为130～150 nm,粒径分布均匀;磷酸酯以共价键的方式连接在苯丙接枝环氧树脂胶乳中;胶乳具有优异的防闪锈性,干/湿附着力优异,同时乳胶膜具有优异的机械力学性能、耐盐水性能以及防腐蚀性能。

Emulsion polymerization was used to prepare the organic phosphate modified styrene - acrylate grafted epoxy resins latex for preparation of the waterborne metal anticorrosive coatings, in which epoxy resin content was 30% and organic phosphate content was 1.2%. The resulting latex could be erosslinked at room temperature. The latex morphology was characterized with TEM; the structure was measured with FT -IR; the flash rust behaviors on metals were studied with the polarizing microscope; and the adhesion was meas- ured with the pull - off method. The results indicated that the latex particles showed regular spheroidal mor- phology, with 130 -150 mn in diameter and uniform particle size distribution; the organic phosphate linked with styrene - acrylate grafted epoxy resins latex by covalent bond ; the latex was excellent in flash rust resist- ance and drying/wet adhesion. And the latex fihn could provide good mechanical properties, salt water re- sistance and anti- corrosion property.