首页> 外国专利> Process for preparing non-tacky particles based on an organopolysiloxane composition cross-linked by polycondensation reactions

Process for preparing non-tacky particles based on an organopolysiloxane composition cross-linked by polycondensation reactions

机译:基于通过缩聚反应交联的有机聚硅氧烷组合物的非粘性颗粒的制备方法

摘要

According to this process the starting alpha , omega -(dihydroxy)silicone oils are emulsified in the presence of silica powder, crosslinking agent and a tin catalyst, and the emulsion is then broken and the particles are crosslinked by heating at a temperature of 40-100 DEG C. Nonadhesive particles are thus obtained, with a mean particle size of between 50  mu m and 3 mm, coated uniformly on their surface with grains of silica. …??Application of the process of the invention to the encapsulation or to the dispersion of active principles such as medications or plant-protection products and to the preparation of flexible fillers for synthetic or natural plastics.
机译:根据该方法,在二氧化硅粉,交联剂和锡催化剂的存在下乳化起始的α,ω-(二羟基)硅油,然后将乳液破碎,并通过在40-由此得到100℃的非粘性颗粒,其平均粒径在50μm至3mm之间,并在其表面上均匀地涂覆有二氧化硅颗粒。 ……将本发明的方法应用于诸如药物或植物保护产品的活性成分的包封或分散,以及用于合成或天然塑料的柔性填料的制备。

著录项

  • 公开/公告号EP0379451A1

    专利类型

  • 公开/公告日1990-07-25

    原文格式PDF

  • 申请/专利权人 RHONE-POULENC CHIMIE;

    申请/专利号EP19900420024

  • 发明设计人 DESMONCEAU DANIEL;JORDA RAFAEL;

    申请日1990-01-16

  • 分类号C08J3/24;C08J3/07;C08J3/12;

  • 国家 EP

  • 入库时间 2022-08-22 06:13:21

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