公开(公告)号：US4600735A

公开(公告)日：1986-07-15

申请号：US701928

申请日：1985-02-15

申请人： Bernt Larsson ,  Gunilla Nobelius ,  Elisabet Johansson

发明人： Bernt Larsson ,  Gunilla Nobelius ,  Elisabet Johansson

IPC分类号： C09K3/18 ,  C08K3/36 ,  C09D129/04 ,  C09K3/00 ,  C08K5/06 ,  C08K9/04 ,  D06M11/06

CPC分类号： C08K3/36 ,  C09D129/04

摘要： A soil-repellent coating composition comprising silica, polyvinyl alcohol and a wetting agent in an aqueous carrier medium. The composition is characterized in that it, in addition to the aqueous carrier medium, contains 0.5-30% by weight of silica and 0.01-6% by weight of polyvinyl alcohol, and 0.05-2.5% by weight of a wetting agent, based on the total weight of the composition. The ready-made coating composition comprises 0.05-5% by weight of silica, 0.05-0.5% by weight of polyvinyl alcohol and 0.05-0.5% by weight of the wetting agent. The silica is present in the form of an alkali stabilized, preferably ammonium stabilized silica sol with an average particle size of 4-30 nm. The polyvinyl alcohol preferably has a hydrolysis degree of 85-100% and an average molecular weight of 15,000-100,000. The weight ratio of silica to polyvinyl alcohol is above 3:1 and preferably from 5:1 to 40:1. The wetting agent preferably is nonionic. The aqueous carrier medium of the composition may comprise a water-miscible, low-boiling solvent such as ethanol in an amount of up to 20% by weight.

摘要翻译： 一种防污涂料组合物，其包含二氧化硅，聚乙烯醇和在载体介质中的润湿剂。 该组合物的特征在于除了水性载体介质之外，其含有0.5-30重量％的二氧化硅和0.01-6重量％的聚乙烯醇，以及0.05-2.5重量％的润湿剂，基于 组合物的总重量。 现成的涂料组合物包含0.05-5重量％的二氧化硅，0.05-0.5重量％的聚乙烯醇和0.05-0.5重量％的润湿剂。 二氧化硅以平均粒径为4-30nm的碱稳定的，优选铵稳定的二氧化硅溶胶的形式存在。 聚乙烯醇的水解度优选为85-100％，平均分子量为15,000-100,000。 二氧化硅与聚乙烯醇的重量比为3:1以上，优选为5:1〜40:1。 润湿剂优选为非离子型。 组合物的水性载体介质可以包含至多20重量％的水混溶性低沸点溶剂如乙醇。