Abstract

Self-crosslinking styrene-acrylic latexes functionalized with 3-isopropenyl-α,α-dimethyl benzyl isocyanate (TMI) by semibatch emulsion polymerization were prepared. Polymerizations were performed in emulsions with aerosol EF-800 surfactant; remarkable colloidal stability of the copolymer latexes was measured in fresh and aged samples. The effects on film formation, tensile properties, permeability to water vapor, and oxygen were evaluated by varying the TMI concentrations (from 0 to 6 wt%). The obtained latexes were used as binder to prepare water-based coatings, which were applied on steel specimens; hydrolysis of TMI acts as a self-crosslinked promoter once the film was applied. Adhesion tests, scratch hardness, and gloss properties were evaluated.

Graphic abstract

Water vapor permeability of latex films

中文翻译：

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丙烯酸丁酯-苯乙烯-TMI胶乳的合成及其在水性涂料中的应用

摘要

制备了通过半间歇乳液聚合，用3-异丙烯基-α，α-二甲基苄基异氰酸酯（TMI）功能化的自交联苯乙烯-丙烯酸胶乳。用气溶胶EF-800表面活性剂在乳液中进行聚合。在新鲜和老化的样品中，共聚物胶乳具有显着的胶体稳定性。通过改变TMI浓度（0至6重量％）来评估对成膜，拉伸性能，对水蒸气和氧气的渗透性的影响。将获得的胶乳用作粘合剂以制备水基涂料，将其涂覆在钢样品上；涂膜后，TMI的水解起自交联促进剂的作用。评估了附着力测试，划痕硬度和光泽度。

图形摘要

乳胶薄膜的水蒸气渗透性