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    • 10. 发明申请
    • HYDROPHILIC POLYURETHANES OF IMPROVED STRENGTH
    • 改善强度的亲水聚氨酯
    • WO1989005319A1
    • 1989-06-15
    • PCT/US1988004263
    • 1988-11-30
    • TYNDALE PLAINS-HUNTER, LTD.
    • TYNDALE PLAINS-HUNTER, LTD.GOULD, Francis, E.JOHNSTON, Christian, W.
    • C08G18/28
    • G02B1/043A61L15/26A61L27/18A61L29/085A61L31/06C08G18/302C08G18/4833C08G18/65C08G18/6674C08G2210/00Y10S623/924C08L75/04
    • The strength and integrity of hydrophilic polyurethane resins prepared by reacting a diol component, an organic chain extender and an organic diisocyanate are improved by critical selection of the diol component, the amount of water in the reaction mixture and the mole ratios of the reactants. The diol component is at least one of (1) a long chain poly(oxyethylene) glycol of molecular weight above 2500 and (2) a medium chain poly(oxyalkylene) glycol or polyester glycol of 250-2500 molecular weight. The chain extender is a difunctional compound having a molecular weight of less than 250. The amount of water in the reaction mixture is 0.5 to 2.5 wt. % and the mole ratios of the diols and water to the chain extender may range as follows: (i) 0.4 to 0.5 of diol (1) and 0.5 to 8.0 of water; (ii) 0.1 to 0.75 of diol (2) and 0.05 to 3.3 of water; (iii) 0.06 to 0.04 of diol (1), 0.1 to 0.2 of diol (2) and 0.25 to 1.25 of water. The polyurethanes have improved utility as carriers for medicaments and a variety of other active agents, as shaped bodies including cannulae, body implants and films, as coating for anti-drag applications, and particularly as needleless catheters for avoidance of contamination from needles.
    • 通过二醇组分,有机扩链剂和有机二异氰酸酯反应制备的亲水性聚氨酯树脂的强度和完整性通过二醇组分的临界选择,反应混合物中的水量和反应物的摩尔比得到改善。 二醇组分是(1)分子量高于2500的长链聚(氧乙烯)二醇和(2)分子量为250-2500的中链聚(氧亚烷基)二醇或聚酯二醇中的至少一种。 扩链剂是分子量小于250的双官能化合物。反应混合物中的水的量为0.5-2.5wt。 %,二醇和水与扩链剂的摩尔比可以如下:(i)0.4至0.5的二醇(1)和0.5至8.0的水; (ii)0.1至0.75的二醇(2)和0.05至3.3的水; (iii)0.06至0.04的二醇(1),0.1至0.2的二醇(2)和0.25至1.25的水。 作为用于药物和各种其它活性剂的载体,聚氨酯具有改进的作用,作为包括套管,体植入物和膜的成形体,作为抗牵引应用的涂层,特别是作为避免针头污染的无针导管。