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公开(公告)号:US20090093605A1
公开(公告)日:2009-04-09
申请号:US12158260
申请日:2006-12-19
申请人: Kamel Ramdani , Helene Bossy , Sebastien Lomel , Nicolas Durand
发明人: Kamel Ramdani , Helene Bossy , Sebastien Lomel , Nicolas Durand
IPC分类号: C08G77/06
CPC分类号: C08G77/04 , C01B33/143 , C08G77/02 , C08G77/16
摘要: The invention relates to, and the general field of the invention is that of, the synthesis of silicone resins, more particularly the synthesis of silicone resins of type MQ. The process relates to the preparation of MQ silicone resins and permits better control of the operating conditions in the step of the polymerization of a sodium silicate (B) in aqueous medium in the presence of an acid (C) to form a silica hydrosol (polysilicic acid). In the course of the polycondensation step the reactants, a sodium silicate and an acid, are mixed, preferably in continuous fashion, dynamically to form a mixture (3), by means of at least one intensive mixing tool (M) producing a power ε per unit volume of more than 10 kW/m3.
摘要翻译: 本发明涉及,本发明的一般领域是有机硅树脂的合成,更具体地说是MQ型硅氧烷树脂的合成。 该方法涉及MQ硅氧烷树脂的制备,并且允许在酸性(C)存在下在水性介质中聚合硅酸钠(B)的步骤中更好地控制操作条件以形成二氧化硅水溶胶 酸)。 在缩聚步骤中,反应物(硅酸钠和酸)优选以连续方式动态混合以形成混合物(3),通过至少一个密集混合工具(M)产生功率ε 每单位体积超过10 kW / m3。