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    EMTEC magnetics GmbH
    18.
    发明授权
    EMTEC magnetics GmbH 失效
    在不存在溶剂的情况下可制备的聚氨酯和它们用作磁记录介质的粘合剂

    公开(公告)号：US6132880A

    公开(公告)日：2000-10-17

    申请号：US128765

    申请日：1998-08-04

    申请人： Franz Weingart ,  Christa Hackl ,  Rudiger Krech ,  Stephan Bauer ,  Albert Kohl ,  Ria Kress ,  Josef Schelble ,  Hans-Ganther Bohrmann

    发明人： Franz Weingart ,  Christa Hackl ,  Rudiger Krech ,  Stephan Bauer ,  Albert Kohl ,  Ria Kress ,  Josef Schelble ,  Hans-Ganther Bohrmann

    IPC分类号： C08G18/28 ,  C08G18/08 ,  C08G18/38 ,  C08G18/42 ,  C08G18/66 ,  C09D5/23 ,  C09D175/04 ,  G11B5/702

    CPC分类号： G11B5/7021 ,  C08G18/0828 ,  C08G18/3857 ,  C08G18/423 ,  C08G18/6666 ,  Y10S428/90 ,  Y10T428/31551 ,  Y10T428/31609

    摘要： The thermoplastic, isocyanate-free polyurethane which contains acidic groups, is soluble in tetrahydrofuran, has a molecular weight of from 15,000 to 70,000 and is composed ofA) 1 mol of a polyol having a molecular weight of from 400 to 4000,B) from 0.3 to 9 mol of a mixture ofB1) if required, a diol of 2 to 18 carbon atoms andB2) from 0.03 to 0.4 mol of a diol having at least one acidic group,C) from 0 to 1 mol of a polyol having 3 to 18 carbon atoms and at least 3 OH groups,D) from 1.25 to 13 mol of a diisocyanate of 6 to 30 carbon atoms andE) from 0 to 1 mol of a primary or secondary amino alcohol of 2 to 16 carbon atoms,the molar ratio of the OH and any NH groups present in the sum of the components A, B, C and E to the NCO groups of component D being from 0.98 to 1.4, is obtainable by reacting the above components in the melt and is suitable in particular as a binder for magnetic recording media.

    摘要翻译： 含有酸性基团的热塑性无异氰酸酯的聚氨酯可溶于四氢呋喃，其分子量为15,000至70,000，由A）1mol分子量为400至4000的多元醇组成，B）为 0.3〜9摩尔的B1）如果需要，2至18个碳原子的二醇和B2）0.03至0.4摩尔的具有至少一个酸性基团的二元醇，C）0至1摩尔多元醇 3至18个碳原子和至少3个OH基团，D）1.25至13摩尔的6至30个碳原子的二异氰酸酯和E）0至1摩尔的2至16个碳原子的伯或仲氨基醇， 存在于组分A，B，C和E的总和中的OH和组分D的NCO基团之间的OH和任何NH基团的摩尔比为0.98至1.4，可通过使熔体中的上述组分反应并且是合适的 特别是作为磁记录介质的粘合剂。

    Production of polyurethane moldings by the reaction injection molding process
    20.
    再颁专利
    Production of polyurethane moldings by the reaction injection molding process 失效
    通过反应注塑成型工艺生产聚氨酯模塑制品

    公开(公告)号：USRE33609E

    公开(公告)日：1991-06-11

    申请号：US331874

    申请日：1989-03-31

    申请人： Neil H. Nodelman

    发明人： Neil H. Nodelman

    IPC分类号： C08G18/32 ,  C08G18/38 ,  C08G18/66

    CPC分类号： C08G18/6666 ,  C08G18/3221 ,  C08G18/3823 ,  C08G18/6674 ,  C08G2101/00 ,  C08G2120/00 ,  C08G2130/00

    摘要： The present invention is directed to a process for the production of polyurethane moldings by reacting a reaction mixture comprising(a) an organic polyisocyanate(b) a compatible polyol blend comprising(i) at least one polyether polyol having a hydroxyl functionality of from 2 to 8, and a molecular weight of from 350 to below 1800, and(ii) at least one hydroxyl functional organic material containing from 2 to 8 hydroxyl groups and having a molecular weight below 350, components (i) and (ii) being used in a weight ratio of component (b)(i) to (b)(ii) of from about 10:1 to about 1:10, and(iii) no more than 45% by weight based on the weight of component (b) of an active hydrogen containing compound having a molecular weight of 1800 or more,said reaction mixture being processed as a one-shot system by the RIM process at an isocyanate index of from about 70 to about 130.