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    • 4. 发明申请
    • METHOD FOR IDENTIFYING BIOABSORBABLE POLYMERS
    • 识别生物可溶性聚合物的方法
    • US20150148514A1
    • 2015-05-28
    • US14407660
    • 2013-06-24
    • Lubrizol Advanced Materials, Inc.
    • Umit G. MakalRoger W. Day
    • G06F19/00C08G18/32C08G18/72
    • G16C20/30C08G18/08C08G18/3203C08G18/4277C08G18/664C08G18/72C08G2230/00F04C2270/041G16C20/40
    • A system and method for producing a bioabsorbable thermoplastic polyurethane tailored to a medical application are provided. The method includes identifying suitable thermoplastic polyurethane properties based on the medical application. The thermoplastic polyurethane comprises units derived from a diol chain extender, a diisocyanate, and a polyol. The thermoplastic polyurethane properties include a biodegradation rate and at least one physical property. The method includes identifying a base thermoplastic polyurethane and altering at least one parameter of the base thermoplastic polyurethane which relates to the desired thermoplastic polyurethane properties to generate a candidate thermoplastic polyurethane. The altering may be performed iteratively until the suitable range of thermoplastic polyurethane properties based on the medical application is met.
    • 提供了一种用于制造适于医疗应用的生物可吸收热塑性聚氨酯的系统和方法。 该方法包括基于医疗应用鉴定合适的热塑性聚氨酯性质。 热塑性聚氨酯包含衍生自二醇增链剂,二异氰酸酯和多元醇的单元。 热塑性聚氨酯性质包括生物降解速率和至少一种物理性质。 该方法包括鉴定基础热塑性聚氨酯并改变与所需热塑性聚氨酯性质相关的基础热塑性聚氨酯的至少一个参数以产生候选的热塑性聚氨酯。 可以迭代地进行改变,直到满足基于医疗应用的热塑性聚氨酯特性的合适范围。
    • 9. 发明申请
    • Crosslinkable Thermoplastic Polyurethane
    • 可交联热塑性聚氨酯
    • US20150034361A1
    • 2015-02-05
    • US14519275
    • 2014-10-21
    • Lubrizol Advanced Materials, Inc.
    • Umit G. MakalGeorge H. LoeberLouis J. Brandewiede
    • C08J5/00B29C71/04H01B13/14H01B3/30H01B7/295
    • C08J5/00B29C71/04B29K2075/00B29K2105/24B29K2995/0016C08G18/6607C08G18/676C08G18/68C08J2375/08H01B3/302H01B7/295H01B13/148
    • The TPU of this invention contains unsaturation in its polymeric backbone. The unsaturation can be present in the soft segment or in the hard segment or in both the soft and hard segments of the TPU. The TPU can be molded like a thermoplastic, and can be subsequently crosslinked by exposure to electron beam irradiation into thermoset articles having excellent chemical resistance, dimensional stability, set properties, heat resistance, oxidative resistance, and creep resistance. In one embodiment, the TPUs of this invention are the reaction product (1) a hydroxyl terminated intermediate, (2) a polyisocyanate, (3) a saturated glycol chain extender, and (4) a glycol chain extender containing carbon-carbon double bonds, such as the allyl moieties present in trimethylolpropane monoallyl ether. In another embodiment of this invention, the thermoplastic polyurethane which is crosslinkable by e-beam irradiation is comprised of the reaction product of (1) a saturated hydroxyl terminated intermediate, (2) an unsaturated hydroxyl terminated intermediate, wherein the unsaturated hydroxyl terminated intermediate contains carbon-carbon double bonds, (3) a polyisocyanate, and (4) a saturated glycol chain extender.
    • 本发明的TPU在其聚合物主链中含有不饱和键。 该不饱和度可以存在于TPU的软段或硬链段或软段和硬区两者中。 TPU可以像热塑性塑料一样成型,并且随后可以通过电子束照射进入具有优异的耐化学性,尺寸稳定性,凝固性,耐热性,耐氧化性和抗蠕变性的热固性制品中而交联。 在一个实施方案中,本发明的TPU是反应产物(1)羟基封端的中间体,(2)多异氰酸酯,(3)饱和的乙二醇增链剂,和(4)含有碳 - 碳双键的二醇链延长剂 ,例如存在于三羟甲基丙烷单烯丙基醚中的烯丙基部分。 在本发明的另一个实施方案中,通过电子束照射可交联的热塑性聚氨酯由(1)饱和羟基封端的中间体,(2)不饱和羟基封端的中间体的反应产物组成,其中不饱和羟基封端的中间体包含 碳 - 碳双键,(3)多异氰酸酯,和(4)饱和二醇增链剂。