1,1,3,3-四甲基-1,3-二硅氧烷二醇的研制  

Preparation of 1,1,3,3-Tetramethyldisiloxane-1,3-diol

作　　者：高成海 杨振华 冯威 史大阔 GAO Chenghai;YANG Zhenhua;FENG Wei;SHI Dakuo(Shandong Dongyue Polymer Material Co.,Ltd.,Zibo 256400,Shandong)

机构地区：[1]山东东岳高分子材料有限公司,山东淄博256400

出　　处：《有机硅材料》2022年第4期24-28,共5页Silicone Material

摘　　要：分别采用3种方法(二甲基二氯硅烷于冷水中水解、D_(4)与氢氧化钠反应、钯催化四甲基二硅氧烷)制备1,1,3,3-四甲基-1,3-二硅氧烷二醇,以寻找有利于其工业化生产的有效路径。最终确定了以四甲基二硅氧烷为原料制备1,1,3,3-四甲基-1,3-二硅氧烷二醇的合成方法。该法操作简单,收率超过90%,易大规模生产。阐述了1,1,3,3-四甲基-1,3-二硅氧烷二醇的合成的相关机理。在钯催化下,形成的Si—PdL_(2)削弱了四甲基二硅氧烷中的Si—H,有利于H—OH的进攻,且随之形成的过渡态活化能大幅降低,从而实现反应速率的加快,同时较短的反应时间能够避免产物1,1,3,3-四甲基-1,3-二硅氧烷二醇发生聚合反应,进一步提高产物收率。1,1,3,3-tetramethyldisiloxane-1,3-diol was prepared by three methods(hydrolysis of dimethyldichlorosilane in cold water,reaction of D_(4)&sodium hydroxide,palladium-catalyzed tetramethyldisiloxane),so as to find an effective route for industrial production.Finally,the synthesis method of 1,1,3,3-tetramethyldisiloxane-1,3-diol from tetramethyldisiloxane was determined.The method is simple,the yield is more than 90%,and easy for mass production.The synthesis mechanism of 1,1,3,3-tetramethyldisiloxane-1,3-diol has been described.Under the catalysis of palladium,the formed Si—PdL_(2) weakens the Si—H bond in tetramethyldisiloxane,which is favorable for the attack of H—OH,the resulting transition state activation energy is greatly reduced,and the reaction rate is accelerated.At the same time,a shorter reaction time can avoid the polymerization of 1,1,3,3-tetramethyldisiloxane-1,3-diol and further improve the yield of the product.

关 键 词：1 1 3 3-四甲基-1 3-二硅氧烷二醇 四甲基二硅氧烷 PD催化 

分 类 号：TQ264.14[化学工程—有机化工]