Manufacture of dialkyl pyridines
    1.
    发明授权
    Manufacture of dialkyl pyridines 失效
    二烷基吡啶的制备

    公开(公告)号:US3689496A

    公开(公告)日:1972-09-05

    申请号:US3689496D

    申请日:1969-08-13

    Applicant: BAYER AG

    CPC classification number: C07D213/08

    Abstract: Alkyl pyridines are manufactured by reacting R-C(CH2OH)3 (a trimethylolalkane) with ammonia or an amine, preferably in the presence of a polar solvent (water) and an acid catalyst.

    Abstract translation: 烷基吡啶通过R-C(CH 2 OH)3(三羟甲基烷烃)与氨或胺反应制备,优选在极性溶剂(水)和酸催化剂存在下制备。

    Thermoplastic polyurethane polyurea powders
    3.
    发明授权
    Thermoplastic polyurethane polyurea powders 失效
    热塑性聚氨酯聚脲粉末

    公开(公告)号:US3868350A

    公开(公告)日:1975-02-25

    申请号:US36418073

    申请日:1973-05-25

    Applicant: BAYER AG

    CPC classification number: C08G18/10 C08G18/0804 C08G18/32 C08G18/3834

    Abstract: Thermoplastic polyurea powders and sedimenting aqueous solutions of the same wherein the powders have A. AN AVERAGE PARTICLE DIAMETER OF FROM 10 TO 1,000 Mu , B. A MELTING RANGE OF FROM 100* TO 180*C., c. a urea and, optionally, urethane group content of from 10 to 30% by weight, with the proviso that the urea group content is at least about 5%, and D. AN IONIC GROUP CONTENT OF FROM 0.01 TO 0.15 MILLIEQUIVALENTS PER GRAM; PREPARED BY REACTING (1) POLYURETHANES WHICH CONTAIN FREE NCO groups and ionic groups with (2) primary and/or secondary aliphatic diamines and/or dicarboxylic acid-bis-hydrazides at an NH to NCO ratio of from 0.1 to 0.95 and in the presence of water. The powders are useful for finishing textiles, for coatings, as binders or as auxiliary agents in the paper industry, and the like.

    Abstract translation: 热塑性聚脲粉末和沉淀水溶液,其中粉末具有A.平均颗粒直径为10至1,000微米,B.从100℃至180℃的熔融范围。

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