Cycloaliphatic thermoplastic polyurethane elastomers
    6.
    发明授权
    Cycloaliphatic thermoplastic polyurethane elastomers 失效
    环脂族热塑性聚氨酯弹性体

    公开(公告)号:US5942593A

    公开(公告)日:1999-08-24

    申请号:US805840

    申请日:1997-03-03

    摘要: A process for the preparation of a polyurethane-urea elastomer having a mole ratio of NCO groups to all active hydrogen atoms in the range of 0.9 to 1.2 is disclosed. The process comprise reacting (A), (B) and (C.2) for form an NCO-containing prepolymer and then reacting said prepolymer with (C.1) and (D). Accordingly (A) is 5-isocyanato-1-(isocyanatomethyl)-1,1,3-trimethylcyclohexane or bis-(4-isocyanatocyclohexyl)-methane,(B) is polytetrahydrofuran or hexanediol polycarbonate and (C.2) is a chain extender. (C.1) is 5-amino-3-amino-methyl-1,3,3-trimethylcyclohexane or bis-(4-aminocyclohexyl)-methane and (D) is a molecular weight regulator. The elastomer thus produced is particularly suitable for the preparation of moldings, films, flexible tubing (for medical purposes) and catheters.

    摘要翻译: 公开了一种制备具有NCO基摩尔数与所有活性氢原子在0.9至1.2范围内的聚氨酯 - 脲弹性体的方法。 该方法包括使(A),(B)和(C.2)反应形成含NCO的预聚物,然后使所述预聚物与(C.1)和(D)反应。 因此(A)是5-异氰酸基-1-(异氰酸根合甲基)-1,1,3-三甲基环己烷或双 - (4-异氰酸根合环己基) - 甲烷,(B)是聚四氢呋喃或己二醇聚碳酸酯,(C.2) 延长剂 (C.1)是5-氨基-3-氨基 - 甲基-1,3,3-三甲基环己烷或双 - (4-氨基环己基) - 甲烷,(D)是分子量调节剂。 如此制备的弹性体特别适用于制备模制品,薄膜,柔性管(用于医疗用途)和导管。

    Process for the continuous production of thermoplastically processable
polyurethanes having improved processing behavior
    8.
    发明授权
    Process for the continuous production of thermoplastically processable polyurethanes having improved processing behavior 失效
    连续生产具有改进的加工性能的热塑性可加工聚氨酯的方法

    公开(公告)号:US5905133A

    公开(公告)日:1999-05-18

    申请号:US880464

    申请日:1997-06-23

    CPC分类号: C08G18/0895 C08G18/10

    摘要: The present invention relates to a process for the continuous production of thermoplastically processable polyurethanes having improved processing behaviour, wherein in a multistep reactionA) one or more linear hydroxyl-terminated polyols a) having a molecular weight of from 500 to 5000 are mixed continuously with a proportion of an organic diisocyanate b) in an NCO:OH ratio of from 2.0:1 to 5.0:1, in a mixing unit at high shear energy,B) the mixture prepared in step A) is reacted continuously to form an isocyanate-terminated prepolymer in a reactor at temperatures of >120.degree. C., until a conversion of >90%, referred to component a), is achieved,C) the prepolymer prepared in step B) is mixed with the remainder of component b), an NCO:OH ratio of from 2.05:1 to 6:1 being established overall in steps A) to C) and an NCO:OH ratio of 0.9 to 1.1 being established when all the components of steps A) to F) are included,D) the mixture prepared in step C) is cooled to a temperature of

    摘要翻译: 本发明涉及连续生产具有改进的加工性能的热塑性加工性聚氨酯的方法,其中在多步反应中A)一种或多种分子量为500-5000的直链羟基封端的多元醇a)与 一种有机二异氰酸酯b)的比例为2.0:1至5.0:1的NCO:HOH比率,B)在步骤A)中制备的混合物连续反应形成异氰酸酯 - 在约120℃的温度下在反应器中终止预聚物,直至达到> 90%的转化率,称为组分a),C)将步骤B)中制备的预聚物与组分b)的剩余部分混合, 在步骤A)至C)中总体确定为2.05:1至6:1的NCO:HOH比,并且当包括步骤A)至F的所有组分时,建立了0.9至1.1的NCO:OH比率) D)将步骤C)中制备的混合物冷却至<190℃ E)将步骤D)中得到的混合物与一种或多种二醇和任选的分子量为60-500的三醇和/或二胺扩链剂c)连续强烈混合最多5秒, F)步骤E)中获得的混合物在与步骤B)中使用的反应器不同的反应器中连续反应以形成热塑性聚氨酯。

    Multistage process for production of thermoplastic polyurethane
elastomers
    9.
    发明授权
    Multistage process for production of thermoplastic polyurethane elastomers 失效
    用于生产热塑性聚氨酯弹性体的多级方法

    公开(公告)号:US5795948A

    公开(公告)日:1998-08-18

    申请号:US654508

    申请日:1996-05-28

    CPC分类号: C08G18/10 C08G18/0895

    摘要: Thermoplastically processable polyurethane elastomers are produced by a process of A) mixing one or more substantially linear macrodiols with a diisocyanate, B) reacting the resultant mixture in a reactor at temperatures of >100.degree. C. to form a prepolymer, C) mixing the prepolymer with one or more low molecular weight chain extenders, and D) reacting the mixture prepared in stage C) to complete conversion in a high-shear, high-viscosity reactor.

    摘要翻译: 热塑性可加工的聚氨酯弹性体通过以下方法制备:A)将一种或多种基本上线性的大分子二醇与二异氰酸酯混合,B)在> 100℃的温度下将所得混合物反应在反应器中以形成预聚物,C)将预聚物 与一种或多种低分子量增链剂反应,和D)在阶段C)中制备的混合物反应,以在高剪切,高粘度的反应器中完成转化。

    Process for preparing TPU molding compositions
    10.
    发明授权
    Process for preparing TPU molding compositions 失效
    制备TPU模塑组合物的方法

    公开(公告)号:US5696205A

    公开(公告)日:1997-12-09

    申请号:US629983

    申请日:1996-04-08

    摘要: A process for the continuous production of a thermoplastic molding composition containing a mixture of TPU and a (co)polymer is disclosed. The process comprises (a) introducing into an extruder under time and temperature conditions sufficient to bring about the formation of thermoplastic polyurethane a (co)polymer, and polyurethane-forming components comprising A) an organic diisocyanate, B) a linear polyol having terminal hydroxyl groups and a molecular weight of 500 to 5000, and C) a chain extender having a molecular weight of 60 to 500, and upon completing the formation of said polyurethane (b) discharging the resulting TPU/(co)polymer mixture from the extruder. Importantly, the (co)polymer contains a flow enhancer and the molar ratio of the NCO groups in A) to the groups which react with NCO in B) and C) is 0.9 to 1.2.

    摘要翻译: 公开了一种连续生产含有TPU和(共)聚合物的混合物的热塑性模塑组合物的方法。 该方法包括(a)在足以导致形成热塑性聚氨酯a(共)聚合物的时间和温度条件下引入挤出机,以及包含A)有机二异氰酸酯的聚氨酯形成组分,B)具有末端羟基的线性多元醇 基团,分子量为500至5000,和C)分子量为60至500的扩链剂,并且在完成形成所述聚氨酯(b)时,从所述挤出机中排出所得TPU /(共)聚合物混合物。 重要的是,(共)聚合物含有流动增强剂,A)中的NCO基团与在B)和C)中与NCO反应的基团的摩尔比为0.9至1.2。