摘要
按照n（苯酚）∶n（甲醛）=1∶3的比例,采用两步碱催化合成工艺,促使苯酚苯环上的邻、对位都能进行羟甲基化反应,在50～90℃程序升温下连续反应2h,合成出浓度45％的水溶性酚醛树脂,残留甲醛量为1.2％（质量分数）.在50～55℃下;用0.3％～1.1％该物质为交联剂,对0.3％～1.0％的聚丙烯酰胺水溶液进行交联,所得凝胶的机械强度达到2.9x104mPa·s;100℃下自脱水缩合的酚醛树脂可作为抗高温性能（>300℃）的调剖堵水剂.
A water soluble phenol-formaldehyde resin is prepared from phenol and formaldehyde of molar ratio 1:3 in aqueous solution through a two-step alkaline catalytic reaction at 50 癈-90 癈 procedurally heating up over 2 hours. The concentration of products is 45% and the residue formaldehyde in the resin is 1.2% (wt) in contrast with 16.5% (wt) for one step catalytic reaction product. The polymer gels viscosity get 2.9x104mPa·s by 0.3%-1.0% polyacrylamide solution with 0.3%-1.1% resol added as crosslinker at 50℃-55℃. The solid phenol-formaldehyde resin could be endured over 300 ℃ after self condensation reaction at 100℃ and be used as profile control and water shutoff agent for high temperature.
出处
《河北工业大学学报》
CAS
2002年第4期37-41,共5页
Journal of Hebei University of Technology
关键词
苯酚
甲醛
水溶性酚醛树脂
碱催化反应
合成
抗高温性
phenol
formaldehyde
water soluble phenol-formaldehyde resin
alkaline catalytic reaction
synthesis
