摘要
以八甲基环四硅氧烷(D4)及含环氧基团的硅烷偶联剂为原料,在碱性催化剂作用下,采用乳液聚合的方法制备了环氧基改性有机硅乳液.测定了聚合反应因素对聚合反应速率、乳液粘度、乳液透光率的影响,结果表明:60￣70℃聚合反应9￣11h(单体滴加时间2￣4h),催化剂用量为乳液总体质量分数的0.25%￣0.75%、偶联剂用量和乳化剂用量分别为D4单体质量分数的2%￣5%、30%￣40%、相比为30%￣45%.红外光谱验证了环氧基改性有机硅分子结构的存在.测试了环氧基改性有机硅乳液的稳定性.结果表明该产品具有优异的稳定性能.
Octamethylcyclotetrasiloxane (D4) and epoxy-contg. siloxane coupling agent were used as raw m-aterials to prep. epoxy-modified silicone emulsion with basic catalyst using emulsion polymn. method. The influences of polymn. factors on the polymn. rate, emulsion viscosity and emulsion transparency were measured, It indicated that polymn. reaction temp. at 60~70 ℃ and time for 9~11 h (monomer dropping for 2~4 h), catalyst amt. at 0.25%~0.75% based on the total wt of the emulsion, coupling agent amt. at 2%~5% of the D4 wt, emulsifier amt. 30%~40% of the D4 wt, and the phase ratio of 30%~45%. IR test confirmed the existence of the epoxy-modified silicone molecules. The emulsion stability was tested to demonstrate that it was a product with excellent stability.
出处
《印染助剂》
CAS
2005年第6期27-30,共4页
Textile Auxiliaries
关键词
环氧基改
性硅
乳液聚合
合成
稳定
性
epoxy-modified silicone
emulsion polymn.
synthesis
stability
