Processes for producing aryl carbamates, isocynates and polyureas using diaryl carbonate
    2.
    发明授权
    Processes for producing aryl carbamates, isocynates and polyureas using diaryl carbonate 有权
    使用碳酸二芳基酯生产芳基氨基甲酸酯,异氰酸酯和聚脲的方法

    公开(公告)号:US09012676B2

    公开(公告)日:2015-04-21

    申请号:US13239664

    申请日:2011-09-22

    摘要: A preparation of aryl carbamates can be achieved readily by carbonylation of an aromatic polyamine compound with diphenyl carbonate (DPC) using a combination of an organic acid and a tertiary amine as a catalyst. Aryl carbamate can be converted into 4,4′-diphenylmethane diisocyanate (MDI) by heating it at about 200 to about 230° C. in a non-polar solvent containing inhibitor such as benzoyl chloride. In another application, trans-ureation of biscarbamates with an amine or mixed amines is found to be extremely facile in a polar solvent such as dimethyl sulfoxide (DMSO) and tetramethylene sulfone (TMS) in absence of any catalyst to make polyurea polymers of high molecular weights. Thus, efficient green-chemistry processes based on biscarbamates in making isocyanate products as well as urea prepolymers, urea elastomers and urea plastics have been developed in all in excellent yields without using reactive phosgene or 4,4′-diphenylmethane diisocyanate separately in the trans-ureation polymerizations.

    摘要翻译: 通过使用有机酸和叔胺的组合作为催化剂使芳族多胺化合物与碳酸二苯酯(DPC)羰基化,可以容易地实现氨基甲酸芳基酯的制备。 通过在含有非极性溶剂的抑制剂如苯甲酰氯中将其加热至约200至约230℃,将氨基甲酸芳酯转化为4,4'-二苯基甲烷二异氰酸酯(MDI)。 在另一个应用中,发现在不存在任何催化剂的情况下,在极性溶剂如二甲基亚砜(DMSO)和四亚甲基砜(TMS)中,使用胺或混合胺转化双氨基甲酸酯非常容易地制备高分子量的聚脲聚合物 重量 因此,在制备异氰酸酯产物以及尿素预聚物,尿素弹性体和尿素塑料中基于双氨基甲酸酯的高效绿色化学方法已经以优异的产率开发,而不用在反式碳酸酯中分别使用反应性光气或4,4'-二苯基甲烷二异氰酸酯, 脲化聚合。

    Blocked polyisocyanates curing free from elimination products for dualcure systems
    3.
    发明授权
    Blocked polyisocyanates curing free from elimination products for dualcure systems 有权
    封闭的多异氰酸酯固化不含双固化系统的消除产物

    公开(公告)号:US08957176B2

    公开(公告)日:2015-02-17

    申请号:US11219395

    申请日:2005-09-02

    CPC分类号: C08G18/8175 C09D175/16

    摘要: The invention provides innovative blocked polyisocyanates whose crosslinking is initiated thermally and photochemically. The polyisocyanates comprise at least one thermally reversibly blocked NCO group whose blocking agent contains at least one group which on exposure to actinic radiation reacts, with polymerization, with ethylenically unsaturated compounds. A process for preparing the polyisocyanates, and their use in binders, is also provided.

    摘要翻译: 本发明提供了创新的封端多异氰酸酯,其交联是热和光化学引发的。 多异氰酸酯包含至少一个热可逆阻挡的NCO基团,其封闭剂含有至少一个在曝光于光化辐射下与烯属不饱和化合物聚合反应的基团。 还提供了制备多异氰酸酯的方法及其在粘合剂中的用途。

    High adhesive acrylate monomer and method for preparing the same
    7.
    发明授权
    High adhesive acrylate monomer and method for preparing the same 有权
    高粘合丙烯酸酯单体及其制备方法

    公开(公告)号:US08404885B2

    公开(公告)日:2013-03-26

    申请号:US12746268

    申请日:2008-12-03

    CPC分类号: C07C275/26 C07C2601/14

    摘要: A high adhesive acrylate monomer has a specific chemistry figure. This monomer may be easily prepared in a simplified way, and various linkers may be used between L-DOPA and an acrylate group attached to a tail of L-DOPA, so molecular weight and size of the entire material may be easily controlled. Also, various kinds of acrylate to be combined to a isocyanate compound used as a linker may be selected, so various molecules may be easily composed.

    摘要翻译: 高粘合丙烯酸酯单体具有特定的化学性质。 该单体可以简单的制备,也可以在L-DOPA和L-DOPA尾部连接的丙烯酸酯基之间使用各种接头,因此可以容易地控制整个材料的分子量和尺寸。 此外,可以选择与用作接头的异氰酸酯化合物组合的各种丙烯酸酯,因此可以容易地组成各种分子。