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1. 发明授权

US5874498A Vinyl acetate emulsions for high scrub paints 失效
标题翻译：乙酸乙烯酯乳液用于高擦洗涂料
公开(公告)号：US5874498A
公开(公告)日：1999-02-23
申请号：US610785
申请日：1996-03-11
申请人： Christian Leonard Daniels , Leon Edward Newman
发明人： Christian Leonard Daniels , Leon Edward Newman
IPC分类号： C08F263/04 , C09D151/00 , C08L29/04
CPC分类号： C09D151/00 , C08F263/04
摘要： This invention relates to improved vinyl acetate-ethylene emulsions for use in formulating high performance paints without the need for coalescing solvents. These latexes are based on copolymers of vinyl acetate and ethylene optionally containing a comonomer such as an alkyl acrylate or methacrylate. Paints formulated from these latexes, without coalescing solvents, are characterized as having substantially no insolubles, the resin particles in the emulsion are characterized as having a particle size of from 0.2 to 0.35 microns measured as weight average by capillary hydrodynamic fractionation. In other words, the copolymer particles are characterized in that a small percentage, up to about 5% of the total number of particles in the latex, have an average size greater than 0.35 microns, and a small percentage have a size smaller than about 0.2 microns. Further the resin particles are essentially monodisperse. Ethylene in place of the conventional acrylate as the low Tg monomer wit the resulting resin particles having a Tg of from minus -5.degree. to 8.degree. C.The improved process for producing the emulsion or latex includes as an important component the formation of a seed latex and then polymerizing the monomers in the presence of the seed, the monomers being introduced over a period of time.
摘要翻译：本发明涉及用于配制高性能涂料而不需要聚结溶剂的改进的乙酸乙烯酯 - 乙烯乳液。这些胶乳基于乙酸乙烯酯和任选含有共聚单体如丙烯酸烷基酯或甲基丙烯酸酯的乙烯的共聚物。由这些胶乳配制的没有聚结溶剂的油漆的特征在于基本上不存在不溶物，乳液中的树脂颗粒的特征在于通过毛细管流体力学分馏作为重均分子测量的粒度为0.2至0.35微米。换句话说，共聚物颗粒的特征在于，胶乳中颗粒总数的高达约5％的小百分比具有大于0.35微米的平均尺寸，并且小百分比具有小于约0.2的尺寸微米。此外，树脂颗粒基本上是单分散的。乙烯代替常规丙烯酸酯作为低Tg单体，所得树脂颗粒的Tg为-5℃至8℃。生产乳液或胶乳的改进方法包括作为重要组分的种子形成胶乳，然后在种子存在下使单体聚合，单体在一段时间内被引入。

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