Silanol-group addition reaction to active double bonds

Elucidation of the phenomenon that a considerable amount of silicic acid is brought into crude rice bran oil is the starting point of this study. Two important results were obtained. (1) Activated white clay- and white carbon-containing silanol groups in the siloxane network can be solubilized by triterpene alcoholds in boilingn-hexane or heptane solvents. (2) Triphenylsilanol can add to the activated double bond such as pendant methylene in triterpene alcoholds and the conjugated trienoic bond contained in salad triglyceride oil or distilled unsaturated fatty acid liquid.This paper was presented at the first U.S.-Japan Seminar on Inorganic and Organometallic Polymers, Nagoya, Japan, March 24–28, 1991.     

有机硅改性SAN树脂的制备研究

利用含不饱和碳碳双键的有机硅单体A-151(乙烯基三乙氧基硅烷)与苯乙烯、丙烯腈进行三元悬浮聚合制备了具有优良的耐热性能和冲击性能的有机硅改性SAN树脂。通过在聚合过程中添加三苯基硅醇避免或减轻在聚合产物加工时的羟基缩合交联反应,达到消除水分的目的。研究确定了聚合过程中各个成分的较佳用量:A-151占苯乙烯和丙烯腈单体总质量的百分数为0.8%,三苯基硅醇与A-151的摩尔比为3.4,PAAS用量为占A-151质量的10%。     

三苯基硅醇的合成研究

研究了原料配比、缩合反应时间、缩合反应温度等因素对产品收率的影响,得到的优化反应条件为：溴苯与镁粉的物质的量比为1：1．1。二苯基二氯硅烷的用量为溴苯的0．8倍,缩合反应时间为3h,缩合反应温度为45—50℃,三苯基硅醇收率稳定在74．57％以上,质量分数大于98％,并用红外光谱对产品进行了验证。