Thermo-sensitive polyether polyurethane, production method thereof and thermo-sensitive composition
申请人:MIYOSHI YUSHI KABUSHIKI KAISHA
公开号:EP0692506A2
公开(公告)日:1996-01-17
Disclosed herein is a thermosensitive polyether polyurethane obtained from a polyoxyalkylene glycol and a diisocyanate compound. The polyether urethane contains polyoxyethylene chain(s), and polyoxypropylene chain(s) having an average molecular weight of 700-20,000 in a weight ratio of 95:5 to 50:50. A method of producing the thermosensitive polyether polyurethane is also disclosed, wherein polyoxyethylene-polyoxypropylene glycol containing polyoxyethylene chain(s), and polyoxypropylene chain(s) having an average molecular weight of 700-20,000 in a weight ratio of 95:5 to 50:50, or a mixture of polyoxyethylene glycol, and polyoxypropylene glycol having an average molecular weight of 700-20,000 mixed in such amounts that a weight ratio of polyoxyethylene chain(s) to polyoxypropylene chain(s) in the mixture is 95:5 to 50:50 is reacted with a diisocyanate compound, or wherein a mixture of polyoxyethylene-polyoxypropylene glycol containing polyoxyethylene chain(s), and polyoxypropylene chain(s) having an average molecular weight of 700-20,000, and polyoxyethylene glycol and/or polyoxypropylene glycol having an average molecular weight of 700-20,000 mixed in such amounts that a weight ratio of polyoxyethylene chain(s) to polyoxypropylene chain(s) in the mixture is 95:5 to 50:50 is reacted with a diisocyanate compound. The diisocyanate compound is reacted in such an amount that isocyanate groups amount to 0.5-1.5 molar equivalents to hydroxyl groups in the polyoxyalkylene glycol or the mixture.
本发明公开了一种由聚氧亚烷基二醇和二异氰酸酯化合物制成的热敏性聚醚聚氨酯。该聚醚聚氨酯含有平均分子量为 700-20,000 的聚氧乙烯链和聚氧丙烯链,其重量比为 95:5 至 50:50。还公开了一种生产热敏聚醚聚氨酯的方法,其中含有聚氧乙烯链的聚氧乙烯-聚氧丙烯乙二醇和平均分子量为700-20000的聚氧丙烯链的重量比为95:5至50:50,或平均分子量为700-20000的聚氧乙烯二醇和聚氧丙烯二醇的混合物,其混合量为混合物中聚氧乙烯链与聚氧丙烯链的重量比为95:5 至 50:50 的比例与二异氰酸酯化合物反应,或其中含有聚氧乙烯链和平均分子量为 700-20,000 的聚氧丙烯链的聚氧乙烯-聚氧丙烯乙二醇混合物,以及平均分子量为 700-20,000 的聚氧乙烯乙二醇和/或聚氧丙烯乙二醇混合物,其混合物中聚氧乙烯链与聚氧丙烯链的重量比为 95:5 至 50:50 的比例与二异氰酸酯化合物反应:5 至 50:50 的比例与二异氰酸酯化合物反应。二异氰酸酯化合物的反应量为异氰酸酯基相当于聚氧乙烯二醇或混合物中羟基的 0.5-1.5 摩尔当量。