AMORPHOUS HIGH PERFORMANCE POLYAMIDE
    44.
    发明申请

    公开(公告)号:US20170081473A1

    公开(公告)日:2017-03-23

    申请号:US15310603

    申请日:2015-05-14

    Abstract: The disclosure relates to an improved method of producing MPMD based amorphous, semi-aromatic polyamides in order to improve their mechanical properties. It also relates to improved formulations of these polyamides which have further improved mechanical properties by the incorporation of greater amounts of isophthalic acid. The disclosure relates to an improved method of producing MPMD based amorphous, semi-aromatic polyamides in order to improve their mechanical properties. It also relates to improved formulations of these polyamides which have further improved mechanical properties by the incorporation of greater amounts of isophthalic acid.

    On-line control of molecular weight in continuous solid state polymerization processes
    46.
    发明授权
    On-line control of molecular weight in continuous solid state polymerization processes 有权
    在线控制连续固态聚合工艺中的分子量

    公开(公告)号:US09487620B2

    公开(公告)日:2016-11-08

    申请号:US14382530

    申请日:2013-02-28

    CPC classification number: C08G63/80 C08G69/06 C08G69/30

    Abstract: Methods of on-line control of molecular weight in continuous solid state polymerization processes. The solid state polymerization process can be a polyester process or to a polyamide process, and more specifically a poly(ethylene terephthalate) (PET) or a poly(butylene terephthalate) (PBT) or a nylon 6,6 continuous solid-state polymerization (SSP) process. An in-line viscometer melts and measures the molecular weight of the SSP resin and adjusts one or more of the process variables, i.e. reactor time, inert gas purity and inert gas temperature to maintain a constant resin molecular weight.

    Abstract translation: 在连续固态聚合过程中在线控制分子量的方法。 固态聚合方法可以是聚酯方法或聚酰胺方法,更具体地是聚对苯二甲酸乙二醇酯(PET)或聚(对苯二甲酸丁二醇酯)(PBT)或尼龙6,6连续固态聚合( SSP)过程。 在线粘度计熔融并测量SSP树脂的分子量,并调节一个或多个工艺参数,即反应器时间,惰性气体纯度和惰性气体温度,以保持树脂分子量恒定。

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