利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

3287 条记录 (耗时 0.022 秒)

    PROCESS FOR PREPARING ISOCYANATES CONTAINING ALKOXYSILANE GROUPS
    16.
    发明申请
    PROCESS FOR PREPARING ISOCYANATES CONTAINING ALKOXYSILANE GROUPS 审中-公开

    公开(公告)号：US20190300553A1

    公开(公告)日：2019-10-03

    申请号：US16356081

    申请日：2019-03-18

    申请人： Evonik Degussa GmbH

    发明人： Manfred Kreczinski ,  Stephan Kohlstruk ,  Dirk Hoppe ,  Emmanouil Spyrou

    IPC分类号： C07F7/20 ,  C07F7/18

    摘要： The present invention relates to a process for preparing isocyanate containing alkoxysilane groups, in which, in the sequence of steps A) to D),A) alkoxysilanoalkylamine is reacted with urea in the presence of an alcohol, optionally in the presence of at least one catalyst, to give alkoxysilanoalkylurethane,B) simultaneously or successively, if used, the catalyst is removed and/or deactivated, and low boilers, medium boilers and/or high boilers are removed,C) purified alkoxysilanoalkylurethane is thermally cleaved to release isocyanate containing alkoxysilane groups and by-product, leaving bottoms material, andD) isocyanate containing alkoxysilane groups and by-product are separated from one another and from bottoms material and collected,in which, in step C), i) the bottoms material is wholly or partly discharged from the cleavage apparatus, ii) subjected to thermal treatment and/or purification and/or an aftertreatment in the presence of alcohol and iii) the material removed, after thermal treatment and/or purification and/or aftertreatment in step B) or C), is fed in again.

    PROCESS FOR PREPARING ISOCYANATES CONTAINING ALKOXYSILANE GROUPS
    17.
    发明申请
    PROCESS FOR PREPARING ISOCYANATES CONTAINING ALKOXYSILANE GROUPS 审中-公开

    公开(公告)号：US20190300551A1

    公开(公告)日：2019-10-03

    申请号：US16356026

    申请日：2019-03-18

    申请人： Evonik Degussa GmbH

    发明人： Manfred Kreczinski ,  Stephan Kohlstruk ,  Emmanouil Spyrou ,  Dirk Hoppe

    IPC分类号： C07F7/18 ,  C07F7/10 ,  B01D3/14

    摘要： The invention relates to a process for preparing isocyanate containing alkoxysilane groups, in which, in the sequence of steps A) to D),A) haloalkylalkoxysilane is reacted with metal cyanate and alcohol to give alkoxysilanoalkylurethane, B) alkoxysilanoalkylurethane is freed of low boilers, solids, salt burdens and/or high boilers and optionally purified, C) alkoxysilanoalkylurethane obtained after B) is thermally cleaved to release isocyanate containing alkoxysilane groups and by-product, leaving bottoms material, and D) isocyanate containing alkoxysilane groups and by-product are separated from one another and from cleavage bottoms material and collected, wherein the process regime at least of steps C) to D) is continuous.

    PROCESS FOR PREPARING ISOCYANATES CONTAINING ALKOXYSILANE GROUPS
    18.
    发明申请
    PROCESS FOR PREPARING ISOCYANATES CONTAINING ALKOXYSILANE GROUPS 审中-公开

    公开(公告)号：US20190300549A1

    公开(公告)日：2019-10-03

    申请号：US16354349

    申请日：2019-03-15

    申请人： Evonik Degussa GmbH

    发明人： Manfred Kreczinski ,  Stephan Kohlstruk ,  Emmanouil Spyrou ,  Dirk Hoppe

    IPC分类号： C07F7/18 ,  B01J31/02

    摘要： The invention relates to a process for preparing isocyanate containing alkoxysilane groups, in which, in the sequence of steps A) to D), A) alkoxysilano(cyclo)alkylamine is reacted with dialkyl carbonate in the presence of a basic catalyst to give alkoxysilano(cyclo)alkylurethane, B) simultaneously or successively, the catalyst is removed and/or deactivated, and low boilers, solids, salt burdens and/or high boilers are removed, C) alkoxysilano(cyclo)alkylurethane obtained after B) is thermally cleaved to release isocyanate containing alkoxysilane groups and by-product, leaving bottoms material, and D) isocyanate containing alkoxysilane groups and by-product are separated from one another and from bottoms material and collected, wherein the basic catalyst is a guanidine base.