蓖麻油基聚氨酯灌封胶的固化行为研究(Ⅰ) 固化过程中的流变行为和凝胶时间  

Studies on Curing Behavior of Castor oil based Polyurethane(Ⅰ) Rheological Behavior and Gelation Time during Curing

作　　者：关键[1] 罗祥林 乐以伦[1] 

机构地区：[1]四川大学高分子材料科学与工程系,成都610065

出　　处：《塑料工业》2001年第3期35-36,39,共3页China Plastics Industry

摘　　要：以蓖麻油 ,4,4’ -二苯基甲烷二异氰酸酯 (MDI)、三羟甲基丙烷 (TMP)与 1,2 -丙二醇为原料合成了蓖麻油基聚氨酯灌封胶 ,研究了灌封胶的固化流变行为和凝胶化时间。结果表明 ,该灌封胶初始粘度低 ,在 2 0℃时不超过 16 0 0mPa·s ;在 2 0℃、40℃和 6 0℃下的可操作时间分别为 38、2 0和 10min ;增加 1,2 -丙二醇用量可降低胶液的固化速度 ,12 0℃固化时的凝胶时间仅为The castor oil based polyurethane potting materials were synthesized from castor oil,4,4 diphenylmethane diisocyanate (MDI),trimethylolpropane (TMP) and 1,2 propanediol.Rheological behavior and gelation time of the potting materials during curing were studied.The experimental results showed that the prepaved potting material had low initial viscosity,being no more than 1600 mPa·s at 20℃,and its operation time at 20℃、40℃ and 60℃ was 38,20 and 10min respectively;the increase of 1,2 propanediol content could decrease the curing rate of the material,which was only 5min at 120℃.

关 键 词：蓖麻油基 医用聚氨酯 固化 灌封胶 流变行为 凝胶 

分 类 号：TQ320[化学工程—合成树脂塑料工业]