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    • 1. 发明申请
    • POLYMER FOR CONTACT LENSES
    • 聚合物用于接触镜片
    • WO2012056195A2
    • 2012-05-03
    • PCT/GB2011/001527
    • 2011-10-24
    • OCUTEC LIMITEDABDUL, RashidBONNETTE, Graham, Neil
    • ABDUL, RashidBONNETTE, Graham, Neil
    • C08G18/48
    • C08L75/08C08G18/10C08G18/12C08G18/4833C08G2210/00G02B1/043C08L71/02C08L75/04
    • The present invention relates to a polyurethane polymer composition prepared by reacting a mixture comprising: a} at least one polyethylene glycol, and either b) at least one poly-isocyanate, having a functionality greater than 2 or c) at least one di-isocyanate and at least one polyol or at least one macropolyol having a functionality greater than 2, wherein the polyol or macropolyol is present at an amount of 0.1 to 9 wt % of the mixture. The invention also relates to a process for preparing a polyurethane xerogel in the form of a moulded article, said process comprising the steps of: i.) preparing said mixture; ii. ) dispensing the reaction mixture formed in step i) into a mould; iii. ) allowing the reaction mixture to react and cure; iv. ) removing the moulded article from the mould; and v. ) hydrating the moulded article.
    • 本发明涉及一种聚氨酯聚合物组合物,其通过使包含:a}至少一种聚乙二醇和b)至少一种官能度大于2的聚异氰酸酯或c)至少一种二异氰酸酯 和至少一种多元醇或至少一种官能度大于2的大多元醇,其中所述多元醇或大多元醇的含量为所述混合物的0.1至9重量%。 本发明还涉及一种制备模制品形式的聚氨酯干凝胶的方法,所述方法包括以下步骤:i)制备所述混合物; II。 )将步骤i)中形成的反应混合物分配到模具中; III。 )使反应混合物反应和固化; IV。 )将模制品从模具中取出; 和v)水合该模制品。