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    PREPOLYMERS CONTAINING ISOCYANATE GROUPS AND A METHOD FOR THE PRODUCTION THEREOF
    11.
    发明申请
    PREPOLYMERS CONTAINING ISOCYANATE GROUPS AND A METHOD FOR THE PRODUCTION THEREOF 审中-公开
    含异氰酸酯基及其制造方法预聚物

    公开(公告)号：WO9961501A8

    公开(公告)日：2000-01-27

    申请号：PCT/EP9903195

    申请日：1999-05-10

    Applicant: BASF AG ,  REICHELT MICHAEL ,  ROTERMUND UDO ,  HEMPEL RENATE ,  FALKE PETER ,  VON MALOTKI PETER ,  SEIFERT HOLGER

    Inventor： REICHELT MICHAEL ,  ROTERMUND UDO ,  HEMPEL RENATE ,  FALKE PETER ,  VON MALOTKI PETER ,  SEIFERT HOLGER

    IPC: C08G18/10 ,  C08G18/50 ,  C08G18/76 ,  C09K3/10 ,  C08G18/48

    CPC classification number: C09K3/1021 ,  C08G18/10 ,  C08G18/5006 ,  C08G18/7664 ,  C08G2101/0008 ,  C08G2101/0025 ,  C08G2101/0083 ,  C08G18/6674

    Abstract: The invention relates to prepolymers which contain isocyanate groups and which can be produced by reacting an isocyanate mixture, said mixture being predominantly comprised of diphenylmethane diisocyanates and polyphenyl polymethylene polyisocyanates, with a maximum proportion of two-core isomers of 74 wt.% with at least 4 functional polyols or with a mixture of polyols having an average functionality of at least 4. The polyols or polyol mixture comprise(s) a hydroxyl value ranging from 200 to 1650 mg KOH/g and an average molar mass of less than 1100 g/mol with an NCO content of at least 30.0 wt.%. In addition, the invention relates to a method for producing these prepolymers which contain isocyanate groups, to their use for producing polyurethanes, and to a method for producing polyurethanes by reacting at least one of the inventive prepolymers which contain isocyanate groups, optionally mixed with additional organic and/or modified organic isocyanates (a), with compounds having at least two reactive hydrogen atoms (b) in the presence of optional expanding agents (c), catalysts (d), optional additional auxiliary agents and/or additives (e).

    Abstract translation: 本发明涉及含有可获得异氰酸酯基通过由二苯基甲烷二异氰酸酯和多苯基多亚甲基多异氰酸酯的主要的异氰酸酯混合物反应的预聚物，具有至少4官能的多元醇的不大于74重量％或具有至少4的平均官能度的多元醇的混合物两环异构体的比例 方法，其中所述多元醇或多元混合物具有的羟基数为200至1650毫克KOH /克和低于1100克/ mol的数均分子量，具有至少30.0重量％的NCO含量。 本发明的目的也可用于，任选地与另外的有机和/或改性的有机异氰酸酯的混合物制备含异氰酸酯基团，它们用于制备聚氨酯这些预聚物和含有异氰酸酯基的至少一种本发明的预聚物反应制备的聚氨酯的处理的方法（a）中 与具有化合物中的至少两个反应性氢原子（b）中，如果需要的话的情况下，发泡剂（C），催化剂（D），以及任选的其它助剂和/或添加剂（E）。

    PRODUCTION OF RIGID POLYURETHANES FOAMS WITH REDUCED DENSITY
    14.
    发明专利
    PRODUCTION OF RIGID POLYURETHANES FOAMS WITH REDUCED DENSITY 未知

    公开(公告)号：CA2228937A1

    公开(公告)日：1998-09-11

    申请号：CA2228937

    申请日：1998-03-10

    Applicant: ROTERMUND UDO ,  KNORR GOTTFRIED ,  BAUM EVA ,  WIEGMANN WERNER ,  SEIFERT HOLGER

    Inventor： ROTERMUND UDO ,  BAUM EVA ,  WIEGMANN WERNER ,  KNORR GOTTFRIED ,  SEIFERT HOLGER

    IPC: C08J9/08 ,  C08G18/48 ,  C08G18/50 ,  C08G18/66 ,  C08J9/14 ,  F16L59/00 ,  C08L75/04

    Abstract: A process for producing rigid polyurethane foams with reduced density by reacting a) organic and/or modified organic polyisocyanates with b) at least one higher-molecular-weight compound having at least two reactive hydrogen atoms and, if desired, e) low-molecular-weight chain extenders and/or crosslinkers in the presence of d) blowing agents, e) catalysts and, if desired, f) other auxiliaries and/or additives, is described, which comprises using, as blowing agent (d), a mixture of cyclopentane with at least one compound which is homogeneously miscible with cyclopentane selected from the class consisting of the alkanes and/or alkenes having 3 or 4 carbon atoms in the molecule and with the carbon dioxide produced from water and isocyanate, and using, as higher-molecular-weight compound (b) having at least two reactive hydrogen atoms, polyethers which contain aromatics and nitrogen. The use of the rigid foams produced in this way as insulating material is also described.

    PREPARATION OF THERMOPLASTIC POLYURETHANES
    15.
    发明专利
    PREPARATION OF THERMOPLASTIC POLYURETHANES 未知

    公开(公告)号：CA2160953A1

    公开(公告)日：1996-04-21

    申请号：CA2160953

    申请日：1995-10-19

    Applicant: EBERHARDT PETER ,  KRECH RUEDIGER ,  ROTERMUND UDO ,  TECHRITZ KLAUS

    Inventor： EBERHARDT PETER ,  KRECH RUEDIGER ,  ROTERMUND UDO ,  TECHRITZ KLAUS

    IPC: C08J3/20 ,  B29B7/88 ,  B29B11/10 ,  B29K75/00 ,  C08G18/00 ,  C08G18/08 ,  B29C69/00 ,  C08L75/04 ,  B29C47/40

    Abstract: Thermoplastic polyurethanes are prepared 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/diameter ratio of from 20 to 60, and discharging the resulting thermoplastic polyurethane from the extruder with shaping, by a process in which at least some of the components a) and b) and of the components c) to f) which may also be used are introduced into a first zone (Z1) of the twinscrew extruder, which zone is equipped with single-flight screw conveying elements which are arranged in a length region beginning from 0 to 3/100 and ending at least at 8/100 and at most at 30/100 of the total screw length L, the low-viscosity mixture is then passed through a mixing zone ( Z2 ) having a small shearing effect and comprising double-flight screw conveying elements and/or mixing elements, this mixing zone ( Z2 ) being arranged within a length region from 8/100 to 45/100 with a total length within this region of from 5/100 to 25/100 of the total screw length L, the product is then passed into a retarding zone (Z3) having little shearing effect, this retarding zone (Z3) being arranged within a length region from 20/100 to 50/100 with a total length of the retarding stage within this region of from 0.2/100 to 10/100 of the total screw length L, the polymerization is then carried out at high viscosity in a polymerization zone (Z4) equipped with double-flight conveying screws, the zone (Z4) being present in a length region from 30/100 to 100/100 of the total screw length L, and the polyurethane is discharged, with the proviso that the process is carried out in such a way that the value E, defined as , where M - is the total torque, in ¢Nm!, acting on the two extruder shafts, n - is the speed of the extruder screws in ¢min-1!, DG- is the smallest internal diameter of the extruder barrel in ¢cm! and V - is the free reactor volume available between the extruder barrel and the screw elements and any other elements as equipment on the extruder shafts in ¢cm3!, is greater than 750.

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