聚硅氧烷接枝改性丙烯酸树脂的合成研究

Study on the Synthesis of Polysiloxane Grafting Modifed Acrylic Resin

聚硅氧烷具有优良的耐热、耐低温和耐候性,丙烯酸树脂具有优良的耐腐蚀和耐候性,两者接枝后得到的改性树脂可以兼具二者优点。本实验合成了聚硅氧烷和丙烯酸树脂,实现二者接枝得到改性树脂,并研究了影响聚硅氧烷、丙烯酸树脂和改性树脂性能的各种因素。结果表明:聚硅氧烷接枝改性丙烯酸树脂的较佳工艺条件:反应温度约80℃,加催化剂,聚硅氧烷用量为丙烯酸树脂质量的20%,并且改性树脂在耐腐蚀性和硬度方面较聚硅氧烷明显改善,在耐热性和硬度方面又较丙烯酸树脂明显提高。

Polysiloxane can provide many excellent properties such as heat resistance, low temperature tolerance and weatherability. Acrylic resin can provide good corrosion resistance and weatherability. Modified resin obtained by grafting had both advantages of them. The polysiloxane and acrylic resin were synthesized respectively, then grafted to obtain modified resin. Various influential factors on property of polysiloxane, acrylic resin, and modified resin were discussed. The results showed that the optimum reaction conditions of acrylic resin grafting modified by polysiloxane were as follows： the reaction temperature was 80 ℃, adding catalyst, the amount of polysiloxane was 20% of the acrylic resin. The modified resin was better than polysiloxane in corrosion resistance and hardness, and improved properties in heat resistance and hardness compared with acrylic resin.