会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 1. 发明授权
    • Microcellular polyurethane elastomer containing urea groups
    • 含有尿素基团的微孔聚氨酯弹性体
    • US6037383A
    • 2000-03-14
    • US91638
    • 1998-10-07
    • Ruediger KrechUdo RotermundHeinz BollmannRenate HempelWolfgang ScholzManfred Genz
    • Ruediger KrechUdo RotermundHeinz BollmannRenate HempelWolfgang ScholzManfred Genz
    • C08J9/36C08G18/08C08G18/76C08G18/04
    • C08G18/7664C08G18/089C08G2101/0066C08G2101/0083C08G2350/00
    • A microcellular PU elastomer having improved dynamic mechanical properties and based on an isocyanate component consisting essentially of 4,4'-MDI and further customary constituents has a physicochemical structure which, in the gel permeation chromatograph (GPC) of a solution of the microcellular polyurethane elastomer prepared at 90.degree. C. in N,N-dimethylformamide containing 1 percent of di-n-butylamine measured against polymethyl methacrylate (PMMA) as standard, displays a signal occurring in addition to low molecular weight main signal and comprising one or more peaks at an (apparent) molar mass of greater than 250,000 g/mol which becomes smaller or disappears on addition of lithium chloride to this solution, and a urea content of from 14 to 18% by weight.A process is also provided for preparing such a microcellular PU elastomer having improved dynamic mechanical properties. The microcellular PU elastomers can be used for producing damping elements.
    • PCT No.PCT / EP96 / 05640 Sec。 371日期:1998年10月7日 102(e)日期1998年10月7日PCT 1996年12月16日PCT公布。 出版物WO97 / 23535 日期1997年7月3日具有改善的动态力学性能并基于由4,4'-MDI和其他常规组分组成的异氰酸酯组分的微孔PU弹性体具有物理化学结构,其在溶液的凝胶渗透色谱(GPC) 在90℃下在含有1%二正丁胺的N,N-二甲基甲酰胺中制备的聚氨基甲酸甲酯(PMMA)作为标准的微孔聚氨酯弹性体显示除了低分子量主信号之外还发生的信号,并且包含 摩尔质量大于250,000g / mol的一个或多个峰变得更小或在向该溶液中加入氯化锂时消失,尿素含量为14至18重量%。 还提供了一种制备这种具有改进的动态力学性能的微孔PU弹性体的方法。 微孔PU弹性体可用于制造阻尼元件。
    • 2. 发明授权
    • Thermoplastic polyurethanes
    • 热塑性聚氨酯
    • US08507633B2
    • 2013-08-13
    • US12293103
    • 2007-04-11
    • Oliver Steffen HenzeRuediger KrechFrank PrissokKarin SchefferFrank SchaeferHeinrich Niermann
    • Oliver Steffen HenzeRuediger KrechFrank PrissokKarin SchefferFrank SchaeferHeinrich Niermann
    • C08G18/00
    • A43B1/14A43B5/04C08G18/4854C08G18/6674C08G2120/00
    • A process for the preparation of thermoplastic polyurethane by reacting (a) isocyanates with (b) compounds reactive toward isocyanates and having a molecular weight (Mw) of from 500 to 10 000 g/mol and (c) chain extenders having a molecular weight of from 50 to 499 g/mol, if appropriate in the presence of (d) catalysts and/or (e) conventional additives, wherein the chain extender mixture consisting of a main chain extender (c1) and one or more co-chain extenders (c2) is used and the thermoplastic polyurethane prepared has a rigid phase fraction of greater than 0.40, the rigid phase fraction being defined by the following formula: rigid ⁢ ⁢ phase ⁢ ⁢ fraction = { ∑ x = 1 k ⁢ [ ( m KVx / M KVx ) * M Iso + m KVx ] } / m ges with the following meanings: MKVx: molar mass of the chain extender x in g/mol mKVx: mass of the chain extender x in g MIso: molar mass of the isocyanate used in g/mol mges: total mass of all starting materials in g k: number of chain extenders.
    • 一种通过使(a)异氰酸酯与(b)对异氰酸酯具有反应性并且分子量(Mw)为500至10000g / mol的化合物和(c)分子量为 在(d)催化剂和/或(e)常规添加剂的存在下,如果合适,其为50至499g / mol,其中由主链延长剂(c1)和一种或多种共扩链剂( c2),所制备的热塑性聚氨酯具有大于0.40的刚性相分数,刚性相分数由下式定义:刚性相凝固分数= {Σx = 1 k [(m KVx / M KVx)* M Iso + m KVx]} / m ges,具有以下含义:MKVx:扩链剂的摩尔质量x(g / mol)mKVx:扩链剂的质量(以g计)MIso:所用异氰酸酯的摩尔质量 以g / mol mges为单位:所有原料的总质量(gk):增链剂数量。
    • 9. 发明授权
    • Preparation of thermoplastic polyurethanes
    • 热塑性聚氨酯的制备
    • US5621024A
    • 1997-04-15
    • US542274
    • 1995-10-12
    • Peter EberhardtRuediger KrechUdo RotermundKlaus Techritz
    • Peter EberhardtRuediger KrechUdo RotermundKlaus Techritz
    • C08J3/20B29B7/88B29B11/10B29K75/00C08G18/00C08G18/08
    • C08G18/0895B29C47/6087
    • The present invention relates to a process for the preparation of thermoplastic polyurethane by reacting a) organic and/or modified organic polyisocyanates with b) at least one oligomeric polyhydroxy and/or polyamino compound having an average molecular weight of from 400 to 10,000 g/mol, in the presence or absence of c) chain extenders having at least two Zerewitinoff-active hydrogen atoms and an average molecular weight of less than 400 g/mol, d) catalysts, e) compounds which are less than difunctional with respect to isocyanates and/or isocyanates which are less than difunctional and, f) assistants and/or additives, in a twin-screw extruder in which both screws rotate in the same direction and which has a length of/diameter ratio of from 20 to 6 and discharging the resulting thermoplastic polyurethane from the extruder with shaping.
    • 本发明涉及通过使a)有机和/或改性的有机多异氰酸酯与b)至少一种平均分子量为400至10,000g / mol的低聚多羟基和/或聚氨基化合物反应来制备热塑性聚氨酯的方法 存在或不存在c)具有至少两个Zerewitinoff-活性氢原子和平均分子量小于400g / mol的扩链剂,d)催化剂,e)相对于异氰酸酯而言小于二官能度的化合物和 /或小于二官能度的异氰酸酯,和f)辅助剂和/或添加剂,其中两个螺杆沿相同方向旋转,并且其长度/直径比为20至6,并将 从挤出机得到的热塑性聚氨酯与成型。