POLYURETHANES
    4.
    发明申请
    POLYURETHANES 审中-公开
    型聚氨酯

    公开(公告)号:WO2016098073A2

    公开(公告)日:2016-06-23

    申请号:PCT/IB2015/059787

    申请日:2015-12-18

    IPC分类号: C08G18/48

    摘要: Partially crosslinked polyurethane polymers comprising diisocyanates and aliphatic hydrocarbon soft segments with a short-chain diol chain extender and a multifunctional amine and/or alcohol crosslinker to provide a polyurethane polymer with useful properties for the production of medical implant devices such as heart valves, are described. The polymers have an unexpected linear elastic region in a range from 5 - 100% and preferably between 10 - 35%. In some embodiments the polyurethanes are a thermally convertible gel formulation which may be converted to a liquid formulation by extended heating to render the polymer suitable for solvent processing techniques such as casting, spraying, spinning, etc. The invention also provides for living hinge polyurethane polymers which are thermally modifiable from a gel to a liquid and reaction injection moulded (RIM) polyurethanes with an enhanced flex life.

    摘要翻译: 描述了包含二异氰酸酯和脂族烃软链段的部分交联的聚氨酯聚合物,其具有短链二醇扩链剂和多官能胺和/或醇交联剂,以提供具有用于生产医用植入装置如心脏瓣膜的有用特性的聚氨酯聚合物 。 聚合物具有在5-100%,优选在10-35%范围内的意想不到的线性弹性区域。 在一些实施方案中,聚氨酯是可热转化的凝胶制剂,其可以通过延长加热转化为液体制剂,以使聚合物适用于溶剂处理技术,例如浇铸,喷涂,纺丝等。本发明还提供活性铰链聚氨酯聚合物 其可从凝胶热变性为具有增强的柔韧寿命的液体和反应注塑(RIM)聚氨酯。

    PRIMERLESS TWO-PART POLYURETHANE ADHESIVE
    7.
    发明申请
    PRIMERLESS TWO-PART POLYURETHANE ADHESIVE 审中-公开
    无铅两部分聚氨酯胶粘剂

    公开(公告)号:WO2010085602A1

    公开(公告)日:2010-07-29

    申请号:PCT/US2010/021731

    申请日:2010-01-22

    IPC分类号: C08G18/00

    摘要: A two-part polyurethane adhesive comprising a prepolymer having the reaction product of a non-ionic surfactant and an allophanate modified isocyanate and a curative having a urethane modified high molecular weight polyol, a urethane modified cross-linking compound and a non-urethane modified low molecular weight chain extending compound. The curative has less than 5 equivalent percent total amino and hydroxyl groups having an equivalent weight greater than about 200. The two-part polyurethane adhesive may be used to adhere one or more substrates and can generally be applied without primer or any significant surface preparation.

    摘要翻译: 一种双组分聚氨酯粘合剂,其包含具有非离子表面活性剂和脲基甲酸酯改性异氰酸酯的反应产物的预聚物和具有氨基甲酸酯改性的高分子量多元醇的固化剂,氨基甲酸酯改性的交联化合物和非氨基甲酸酯改性的低聚物 分子链延伸化合物。 固化剂具有小于等于5当量%的当量重量大于约200的氨基和羟基。双组分聚氨酯粘合剂可用于粘附一种或多种底物,并且通常可在无底漆或任何显着的表面处理的情况下施用。