【摘要】 采用二步法合成工艺合成了甲阶酚醛树脂,研究了醛酚摩尔比、催化剂品种对酚醛树脂残碳量的影响。当采用碱金属碳酸盐作催化剂;醛酚摩尔比为1.35～1.37时;树脂具有最高的残碳量。采用最优化工艺合成的液体酚醛树脂残碳量达到49%。与一步法合成工艺相比,残碳量提高4～5%,抗氧化温度提高40～50℃。由此合成的结合剂适用于含碳耐火材料的制造。更多还原

【Abstract】 Phenolic resin possessing higher remaining carbon was synthesized by two-step technology. The influence of mole ratio of phenol and formaldehyde and kinds of catalysts has been studied. By Na₂CO₃ or K₂CO₃ as catalyst, the phenolic resin possesses the highest remaining carbon when the molar ratio of formaldehyde and phenol is from 1.35 to 1.37. The remaining carbon of the liquid resin is 49% by adopting best technology. Compare with one-step technology, 4～5% more remaining carbon and 40～50℃ higher anti-oxidation temperature can be achieved. It is suitable to make refractory containing carbon.更多还原