利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

71 条记录 (耗时 0.023 秒)

    Carbodiimide-modified polymethylene polyphenylene polyisocyanates for use in the preparation of polyisocyanurate-polyurethane foams
    3.
    发明授权
    Carbodiimide-modified polymethylene polyphenylene polyisocyanates for use in the preparation of polyisocyanurate-polyurethane foams 失效
    用于制备聚异氰脲酸酯 - 聚氨酯泡沫的碳二亚胺改性聚亚甲基多亚苯基多异氰酸酯

    公开(公告)号：US4424288A

    公开(公告)日：1984-01-03

    申请号：US334158

    申请日：1981-12-24

    申请人： John T. Patton, Jr. ,  Peter T. Kan ,  Thirumurti Narayan

    发明人： John T. Patton, Jr. ,  Peter T. Kan ,  Thirumurti Narayan

    IPC分类号： C08G18/48 ,  C08G18/79 ,  C08G18/14 ,  C08G18/78

    CPC分类号： C08G18/797 ,  C08G18/4829 ,  C08G2105/02 ,  Y10S521/901 ,  Y10S521/902

    摘要： Liquid carbodiimide-modified organic polyisocyanates are prepared by reacting a crude polymethylene polyphenylene polyisocyanate containing no more than 70 weight percent diphenylmethane diisocyanate with an isomer mixture of 40 to 100 weight percent 4,4'-, 0 to 50 weight percent 2,4- and 0 to 10 weight percent 2,2'-diphenylmethane diisocyanate and having an average functionality of 2.1 to 2.7 and a free NCO content of at least 30 percent weight percent in the presence of an effective amount of carbodimidization catalyst. Polyisocyanurate-polyurethane foams prepared by reacting the modified polyisocyanates and polyols selected from the group consisting of diethylene glycol and ethylene oxide adducts of trimethylolpropane, trimethylolethane, glycerine, pentaerythritol, .alpha.-methylglucoside, sucrose, toluene diamine and methylene dianiline in the presence of trimerization catalysts exhibit improved compression strengths and K-factors with low friability and smoke density.

    摘要翻译： 液体碳二亚胺改性的有机多异氰酸酯通过使含有不超过70重量％的二苯基甲烷二异氰酸酯的粗多亚甲基多亚苯基多异氰酸酯与40至100重量％的4,4'-，0至50重量％的2,4-和 0至10重量％的2,2'-二苯基甲烷二异氰酸酯，并且在有效量的碳二亚胺化催化剂存在下，其平均官能度为2.1至2.7，游离NCO含量为至少30重量％。 通过在三聚催化剂存在下，使改性多异氰酸酯和选自二甘醇和三羟甲基丙烷，三羟甲基乙烷，甘油，季戊四醇，α-甲基葡糖苷，蔗糖，甲苯二胺和亚甲基二苯胺的环氧乙烷加成物反应制备的聚异氰脲酸酯聚氨酯泡沫 表现出改善的压缩强度和具有低脆性和烟密度的K因子。

    Isocyanurate-modified polymethylene polyphenylene polyisocyanate compositions
    4.
    发明授权
    Isocyanurate-modified polymethylene polyphenylene polyisocyanate compositions 失效
    异氰脲酸酯改性聚亚甲基多亚苯基多异氰酸酯组合物

    公开(公告)号：US4382125A

    公开(公告)日：1983-05-03

    申请号：US325684

    申请日：1981-11-30

    申请人： Thirumurti Narayan ,  Peter T. Kan ,  John T. Patton, Jr.

    发明人： Thirumurti Narayan ,  Peter T. Kan ,  John T. Patton, Jr.

    IPC分类号： C08G18/32 ,  C08G18/48 ,  C08G18/76 ,  C08G18/79 ,  C08G18/14

    CPC分类号： C08G18/794 ,  C08G18/3206 ,  C08G18/4833 ,  C08G18/7664 ,  Y10S521/902

    摘要： A stable isocyanurate-modified polyisocyanate prepared by trimerizing an organic polyisocyanate mixture of 45 to 70 percent by weight of diphenylmethane diisocyanate having an isomer mixture of 40 to 100 weight percent, 4,4'-, 0 to 50 weight percent 2,4-, and 0 to 10 weight percent 2,2'-diphenylmethane diisocyanate and from 30 to 55 percent by weight polymethylene polyphenylene polyisocyanate with an isocyanurate content of 20 to 33 percent by weight. Polyurethane isocyanurate foams prepared from the reaction of these isocyanates with active hydrogen compounds selected from the group consisting of diethylene glycol and ethylene oxide adducts of trimethylolpropane, trimethylolethane, and glycerine exhibit good K- factors, low friability and low smoke density.

    摘要翻译： 一种稳定的异氰脲酸酯改性的多异氰酸酯，它是通过将有机多异氰酸酯混合物的45-70％（重量比）的二异氰酸酯二异氰酸酯与40至100％（重量）的异构体混合物，4,4'-，0-50％（重量）的2,4- 和0至10重量％的2,2'-二苯基甲烷二异氰酸酯和30至55重量％的聚亚甲基聚亚苯基多异氰酸酯，异氰脲酸酯含量为20至33重量％。 由这些异氰酸酯与三羟甲基丙烷，三羟甲基乙烷和甘油的二甘醇和环氧乙烷加合物的活性氢化合物的反应制备的聚氨酯异氰脲酸酯泡沫显示出良好的K-因子，低脆性和低烟雾密度。