环保溶剂型氯丁胶的制备

目前,溶剂型氯丁胶仍在橡胶基胶粘剂中占主导地位。为制备低毒性溶剂型氯丁胶,可根据"溶度参数+氢键指数"法优选出溶解氯丁橡胶用非苯类混合溶剂的较佳配比;然后使叔丁基酚醛树脂与轻质MgO预先发生螯合反应制得预反应液,再采用混炼法制得固化速率快、固含量高达35.5%的环保溶剂型氯丁胶。研究结果表明:当混合溶剂中m(120#溶剂油)∶m(乙酸乙酯)∶m(丙酮)=4∶7∶4时,相应氯丁胶的综合性能相对最好,其剪切强度为1.83 MPa、剥离强度为17.9 N/25 mm。

Preparation of environment-friendly solvent-based neoprene adhesive

At present,the solvent-based neoprene adhesive was still dominant in rubber-based adhesives.In order to make low-toxicity solvent-based neoprene adhesive,the better proportion of non-benzene mixed solvents for liquefying neoprene was preferred by "solubility parameter+hydrogen bond index" method,then a pre-reaction liquid between tert-butyl phenolic resin and light-MgO was made by pre-chelation reaction.Finally,a environment-friendly solvent-based neoprene adhesive with faster curing speed and 35.5% solid contents was prepared by mixing.The research results showed that the corresponding neoprene adhesive had reversely best combination property because its shear strength and peeling strength were 1.83 MPa and 17.9 N/25 mm respectively when mass ratio of m(120# solvent oil)∶m(ethyl acetate)∶m(acetone) was 4∶7∶4 in mixed solvent.