氨基硅油制备过程中粘度影响因素的研究

以八甲基环四硅氧烷(D4)和N-β-氨乙基-γ氨丙基甲基二甲氧硅烷(KH-792)为原料,用KOH作为催化剂,六甲基二硅氧烷(MM)为封端剂,二甲基亚砜(DMSO)为促进剂,采用本体阴离子聚合法合成了氨基封端的聚硅氧烷,对其结构用红外光谱进行了表征。研究了制备过程中反应温度、反应时间及促进剂、催化剂和封端剂用量等对反应体系粘度的影响,得出了适宜的工艺条件是:反应温度90℃,反应时间8h,催化剂为有效成分质量的0.12%,促进剂为有效成分质量的1.0%。

Study on the effecting factors of inherent viscosity in aminopolysiloxane preparation

Octamethylcyclotetrasiloxane(D4)and N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane(KH-792) were chosen to synthesize aminopolysiloxane by bulk anion polymerization,with KOH as catalyst,hexamethyldisiloxane(MM)used as end capping agent,and dimethyl sulfoxide(DMSO) utilized as accelerating agent.The structure of aminopolysiloxane was characterized with IR spectrum.The effect of reaction time,reaction temperature,and the amount of catalyst,accelerating agent and end capping agent on inherent viscosity was researched,and the optimal conditions were obtained as follows:the reaction temperature 90 ℃,reaction time 8 h,the catalyst's amount 0.12%(relative to the effective ingredients),the accelerating agent's quantity 1%(relative to the effective ingredients).