有机硅氧烷改性丙烯酸乳液合成及性能研究

Synthesis and Performance of Siloxane Modified Acrylic Emulsion

通过乳液聚合法,用羟基硅油与硅烷偶联剂A-151(乙烯基三乙氧基硅烷)或KH-570(γ-甲基丙烯酰氧基丙基三甲氧基硅烷)对丙烯酸酯进行化学改性,借助硅烷偶联剂中的碳碳双键和硅氧烷结构将羟基硅油与丙烯酸酯连接起来。然后利用红外光谱(FT-IR)对改性丙烯酸酯的微观结构进行表征,研究结果表明:Si—O键成功地共聚到了丙烯酸长链中。并对改性后乳液的各项性能进行对比,结果发现通过KH-570改性后的丙烯酸酯乳液在各项性能上都有明显的提升。

Through emulsion polymerization, hydroxyl silicone oil and silane coupling agent A - 151 （VTES） or KH - 570 （ γ- methacryl trimethoxysilane） were used for chemical modification of acrylates. The carbon - carbon double bond and the siloxane structure in silane coupling agent kept the hydroxyl silicon oil and acrylate connected. The mierostructure of modified acrylate was characterized by FT - IR. The results showed that the Si-O bond was successfully eopolymerized into the acrylate polymer chain. And the performance of the modified emulsion was compared and the performance KH -570 modified acrylic emulsion has been significantly improved.