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1. 发明授权

US4661556A Method of producing reinforced aqueous emulsion of polydiorganosiloxane 失效
标题翻译：生产聚二有机硅氧烷增强水性乳液的方法
公开(公告)号：US4661556A
公开(公告)日：1987-04-28
申请号：US737601
申请日：1985-05-24
申请人： David J. Huebner , Julie K. Landis
发明人： David J. Huebner , Julie K. Landis
IPC分类号： C08L83/04 , C08G77/06 , C08G77/08 , C08J3/02 , C08J9/12 , C08L83/00 , C08L83/06
CPC分类号： C08J3/02 , C08G77/06 , C08G77/08 , C08J2383/04
摘要： This invention is a method of producing a colloidal silica reinforced polydiorganosiloxane fluid in aqueous emulsion. The method combines an acidic aqueous colloidal silica sol and low molecular weight hydroxyl endblocked polydiorganosiloxane with anionic emulsifying agent, then homogenizes the mixture to form an emulsion. Because the water in the colloidal silica sol is used to supply water for the emulsion, it is possible to produce emulsions with solid content as high as 80 percent by weight. The emulsion is then mixed with surface active anionic catalyst and aged at room temperature to allow the polydiorganosiloxane to polymerize. Polymerization is halted by adding base to bring the pH to greater than 7. The reinforced polydiorganosiloxane emulsion can be further mixed with diorganotindicarboxylate and aged to give a curable emulsion which yields an elastomer upon removal of the water. A curable emulsion can also be produced by mixing the reinforced polydiorganosiloxane emulsion with diorganotindicarboxylate and alkylorthosilicate.
摘要翻译：本发明是一种在水性乳液中制备胶体二氧化硅增强的聚二有机硅氧烷流体的方法。该方法将酸性含水胶体硅溶胶和低分子量羟基封端的聚二有机硅氧烷与阴离子乳化剂结合，然后使混合物均化形成乳液。由于胶体二氧化硅溶胶中的水用于为乳液提供水，所以可以制备固体含量高达80重量％的乳液。然后将乳液与表面活性阴离子催化剂混合并在室温下老化，以使聚二有机硅氧烷聚合。通过添加碱使pH高于7来停止聚合。增强的聚二有机硅氧烷乳液可以与二有机锡二羧酸酯进一步混合并老化，得到可去除水的可固化乳液，产生弹性体。可以通过将增强的聚二有机硅氧烷乳液与二有机锡二羧酸酯和原硅酸烷基酯混合来制备可固化乳液。

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