会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 10. 发明申请
    • PROCESS FOR MAKING POLYETHYLENE TEREPHTHALATE
    • 制备聚乙烯三烯酸的方法
    • US20120071625A1
    • 2012-03-22
    • US13256437
    • 2010-03-10
    • Mummaneni Venkateswara RaoMunif Al-MunifZahir Bashir
    • Mummaneni Venkateswara RaoMunif Al-MunifZahir Bashir
    • C08G63/183
    • C08G63/82C08G63/83C08G63/866
    • The invention relates to a process for making polyethylene terephthalate (PET) from ethylene glycol (EG), purified terephthalic acid (PTA) and optionally up to 30 mol % comonomer, using a catalyst system essentially consisting of antimony—(Sb), zinc—(Zn) and phosphorous—(P) compounds, comprising the steps of a) esterifying EG and PTA to form diethyleneglycol terephthalate and oligomers (DGT), and b) melt-phase polycondensing DGT to form polyester and EG1 wherein the Sb- and P-compounds are added in step a) and the Zn-compound is added after step a). With this process PET can be obtained that shows favourable colour and optical clarity, also if recycling of EG is applied in the process, and a relatively low rate of acetaldehyde re-generation during melt-processing.
    • 本发明涉及一种由乙二醇(EG),纯对苯二甲酸(PTA)和任选的至多30mol%共聚单体制备聚对苯二甲酸乙二醇酯(PET)的方法,该催化剂体系主要由锑 - (Sb),锌 - (Zn)和磷 - (P)化合物,包括以下步骤:a)酯化EG和PTA以形成对二醇二乙二醇酯和低聚物(DGT),和b)熔融相缩聚DGT以形成聚酯和EG1,其中Sb-和P - 化合物在步骤a)中加入,并且在步骤a)之后加入Zn化合物。 通过该方法,可以获得显示有利的颜色和光学透明度的PET,以及在该方法中应用EG的再循环以及在熔融加工期间相对较低的乙醛再生速率。