申请人:NEW MATERIAL INSTITUTE OF SHANDONG ACADEMY OF SCIENCES
公开号:US20150259365A1
公开(公告)日:2015-09-17
The invention relates to a preparation method of vinyl-terminated siloxane. R
2
R
3
Si(OR
4
)
2
, R
1
2
(CH
2
═CH)SiOSi(CH═CH
2
)R
1
2
, an organic acid and a catalyst are added into a reaction bottle according to the molar ratio of 1:1-1.5:1-2.5:0.005-0.01, wherein R
1
is alkyl, R
2
and R
3
are alkyl, aryl or substituted alkyl, substituted aryl identically and differently, and R
4
is alkyl, heating is performed to 50-80° C. while stirring, the stirring reaction is performed at the temperature for 5-30 min, then a dehydrating agent is added, and the reaction is continuously performed for 2-5 h at the temperature of 50-80° C.; and the temperature is reduced to room temperature after the end of reaction, and then dilution, washing with water to neutral, collection of an organic phase, drying, filtering, concentration, reduced pressure distillation and collection of a fraction at corresponding pressure and temperature are sequentially performed so as to obtain a vinyl-terminated siloxane compound product.
本发明涉及一种乙烯基终止硅氧烷的制备方法。根据摩尔比为1:1-1.5:1-2.5:0.005-0.01,在反应瓶中加入R2R3Si(OR4)2,R12(CH2═CH)SiOSi(CH═CH2)R12,有机酸和催化剂,其中R1为烷基,R2和R3为烷基,芳基或取代烷基,取代芳基相同或不同,R4为烷基,搅拌加热至50-80℃,在该温度下搅拌反应5-30分钟,然后加入脱水剂,在50-80℃下连续反应2-5小时;反应结束后降温至室温,然后依次进行稀释、水洗至中性、收集有机相、干燥、过滤、浓缩、减压蒸馏和在相应的压力和温度下收集馏分,以获得乙烯基终止硅氧烷化合物产品。