Incorporation of functional groups in polymers
    3.
    发明授权
    Incorporation of functional groups in polymers 失效
    在聚合物中引入官能团

    公开(公告)号:US5294679A

    公开(公告)日:1994-03-15

    申请号:US33212

    申请日:1993-03-18

    摘要: New polymers are disclosed to be made in supported Ziegler-Natta systems. They include monomers exhibiting polar functionality such as through a hydroxyl group or other functional group protected during polymerization in the presence of highly active catalysts by the use of a protective alkyl silane group which is removed after polymerization to restore the functionality of the group. The typical polymer thus made is a polyolefin having functional groups on its backbone; the functional groups may be reacted with conventional dyes and/or may perform other functions and enter reactions with other reactive compounds.

    摘要翻译: 公开了新的聚合物在支持的齐格勒 - 纳塔(Ziegler-Natta)系统中制备。 它们包括具有极性官能团的单体,例如通过使用保护性烷基硅烷基团在高活性催化剂存在下在聚合过程中保护的其它官能团,聚合后除去,以恢复基团的官能团。 由此制得的典型聚合物是其主链上具有官能团的聚烯烃; 官能团可以与常规染料反应和/或可以进行其它功能并与其它反应性化合物反应。

    Manufacture of trimethylolpropane
    10.
    发明授权
    Manufacture of trimethylolpropane 失效
    三羟甲基丙烷的制造

    公开(公告)号:US5763690A

    公开(公告)日:1998-06-09

    申请号:US691760

    申请日:1996-08-02

    IPC分类号: C07C29/141 C07C29/14

    CPC分类号: C07C29/141

    摘要: Trimethylolpropane of high purity is efficiently made by mixing the aldol reaction product of formaldehyde and n-butyraldehyde with at least about 20 wt % of a lower alcohol prior to hydrogenation. The alcohol addition also promotes hydrogenolysis of by-product esters at pressures below 3000 psig and allows recovery of high purity product by simple distillation.

    摘要翻译: 在氢化之前,通过将甲醛和正丁醛的醛醇缩合反应产物与至少约20重量%的低级醇混合来有效地制备高纯度的三羟甲基丙烷。 酒精添加还促进副产物酯在低于3000psig的压力下的氢解,并允许通过简单蒸馏回收高纯度产物。