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相对于双酚A(BPA)的均聚物,二甲基双酚环己烷(DMBPC)改性BPA后的缩聚物大大提高了其耐腐蚀性,特别是耐碱性。对DMBPC与BPA两者共聚方式、物料比、预聚温度、缩聚温度、催化剂种类等主要因素进行了考察,结果表明:DMBPC和BPA分别成氯甲酸酯基后再混合缩聚得到的共聚物分子量分布窄,转化率较高。优化条件为:DMBPC投料量为20%~30%(n/n),三乙胺为催化剂,预聚温度为15~25℃,缩聚温度为35~40℃。
Polycondensates modified with dimethyl bisphenol-cyclohexane (DMBPC) BPA greatly improve their corrosion resistance, especially their alkali resistance, relative to the homopolymer of bisphenol A (BPA). The main factors such as copolymerization mode, material ratio, prepolymerization temperature, polycondensation temperature and catalyst type of DMBPC and BPA were investigated. The results showed that the molecular weight of copolymer obtained by polycondensation of DMBPC and BPA Narrow distribution, higher conversion rate. The optimized conditions are as follows: the dosage of DMBPC is 20% ~ 30% (n / n), triethylamine is the catalyst, the prepolymerization temperature is 15 ~ 25 ℃ and the polycondensation temperature is 35 ~ 40 ℃.