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1. 发明授权

US5674938A Liquid polysiloxanes 失效
标题翻译：液体聚硅氧烷
公开(公告)号：US5674938A
公开(公告)日：1997-10-07
申请号：US358583
申请日：1994-12-13
申请人： Holger Rautschek , Rosemarie Guehne , Harald Schickmann
发明人： Holger Rautschek , Rosemarie Guehne , Harald Schickmann
IPC分类号： B01D19/04 , B29C33/64 , C08G77/02 , C08G77/04 , C08G77/06 , C08G77/08 , C08G77/10 , C08G77/44 , C08J3/02 , C08J3/18 , C09K8/035 , C08K3/00
CPC分类号： B01D69/10 , B29C33/64 , C08G77/06 , C08G77/08 , C09K8/035
摘要： Liquid polysiloxanes are used in defoamant preparations, as diffusion-resistant plasticizer oils, separation agents, or impregnation agents. The liquid polysiloxanes are obtained by reacting: (1) 100 parts by weight of the hydrolysis product of dimethyldichlorosilane having a viscosity of less than 200 mm.sup.2 /sec at 25.degree. C.; (2) 1-100 parts by weight of a polydiorganosiloxane having a viscosity of less than 200 mm.sup.2 /sec at 25.degree. C., of formula (I) R.sup.3.sub.c SiO.sub.(4-c)/2, (I) where each R.sup.3 is independently a substituted or unsubstituted hydrocarbon group with 1-30 carbon atoms, and c has mean value 1.9-3.0; and (3) 0.1-20 parts by weight of one or more compounds (a)-(d), where (a) is a silicon compound of formula (II) R.sup.4.sub.d SiX.sub.(4-d), (II) where R.sup.4 is a substituted or unsubstituted hydrocarbon group with 1-10 carbon atoms, X is a hydrolyzable group, and d is a number between 0 and 1; (b) is a partial hydrolyzate of (a); (c) is a silicone resin comprised essentially of units of (CH.sub.3).sub.3 SiO.sub.1/2 and SiO.sub.2, in a ratio in the range of 2:1 to 1:2; and (d) is a pyrogenic or precipitated hydrophilic silicic acid with a BET surface area of 50-400 m.sup.2 /g; in the presence of a catalytically effective amount of a catalyst which accelerates the reaction of compounds (1)-(3).
摘要翻译：液体聚硅氧烷用作消泡剂制剂，作为扩散性增塑剂油，分离剂或浸渍剂。液体聚硅氧烷是通过以下方法获得的：（1）在25℃下粘度小于200mm 2 /秒的100重量份的二甲基二氯硅烷的水解产物。（2）1-100重量份在25℃下粘度小于200mm 2 / sec的式（I）R 3 c SiO（4-c）/ 2，（I）的聚二有机硅氧烷，其中每个R 3独立地为取代或未取代的具有1-30个碳原子的烃基，c的平均值为1.9-3.0; 和（3）0.1-20重量份的一种或多种化合物（a） - （d），其中（a）是式（II）的硅化合物R4dSiX（4-d），（II）其中R4是具有1-10个碳原子的取代或未取代的烃基，X是可水解基团，d是0和1之间的数; （b）是部分水解产物（a）; （c）是基本上由（CH3）3SiO + E，fra1 / 2 + EE和SiO2的单元组成的有机硅树脂，其比例为2:1至1:2; 和（d）是BET表面积为50-400m2 / g的热原或沉淀亲水性硅酸; 在催化有效量的催化剂的存在下，加速化合物（1） - （3）的反应。

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