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Novel Waterborne Coatings via Hybrid Miniemulsion Polymerization

机译：杂化细乳液聚合的新型水性涂料

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As part of a wider effort to develop a new class of water-borne coatings, hybrid miniemulsion polymerization was carried out with acrylic monomers (methyl methacrylate, butyl acrylate and acrylic acid) in the presence of alkyd and oil-modified polyurethane resins. Latexes with different ratios of resin to acrylic monomers were synthesized. The monomer emulsions prepared for hybrid miniemulsion polymerization showed excellent shelf-life stability (up to 5 months) and the polymerization was run free of coagulation. Solvent extraction indicated that the grafting efficiency of polyacrylics was greater than 20% for all the samples produced. ~(13)C solution NMR spectrum showed that a substantial fraction of the original carbon double bonds (>60%) in the resin remained after polymerization for film curing. Films obtained from the latexes showed good adhesion and fair hardness properties. Alkyd/acrylate coatings are targeted as a replacement for solvent-based architectural coatings, and oil-modified polyurethane/acrylate coatings may provide a low VOC alternative to solvent-based clear coats.
机译：作为开发新型水性涂料的更广泛努力的一部分，在醇酸和油改性聚氨酯树脂的存在下，使用丙烯酸类单体（甲基丙烯酸甲酯，丙烯酸丁酯和丙烯酸）进行了混合细乳液聚合。合成了具有不同比例的树脂与丙烯酸单体的胶乳。为杂化细乳液聚合制备的单体乳液显示出极佳的保存期限稳定性（长达5个月），并且聚合过程不发生凝结。溶剂萃取表明，对于所有生产的样品，聚丙烯酸酯的接枝效率均大于20％。 〜（13）C溶液的NMR光谱表明，聚合后的树脂固化后，树脂中残留了大部分原始碳双键（> 60％）。从乳胶获得的膜显示出良好的粘合性和中等硬度性能。醇酸/丙烯酸酯涂料的目标是替代基于溶剂的建筑涂料，而油改性的聚氨酯/丙烯酸酯涂料可提供低VOC替代基于溶剂的透明涂料。

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