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CYCLIC POLY(ARYL ETHER) OLIGOMERS, A PROCESS FOR PREPARATION THEREOF, AND POLYMERIZATION OF CYCLIC POLY(ARYL ETHER) OLIGOMERS

机译：环状聚（芳醚）低聚物，其制备方法和环状聚（芳醚）低聚物的聚合

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摘要

The present invention is directed to cyclic poly(aryl ether) oligomers and mixtures thereof, and methods for the preparation thereof in a highly dilute reaction medium under reaction conditions favorable for ring closure at low degrees of polymerization. These oligomers are represented by the general formula CHEM where each Y is divalent oxygen or divalent sulfur, each Ar is an aromatic diradical which comprises one or more C6 to C20 arylene groups and has at least one electron withdrawing group attached to an aromatic ring, and n is an integer from 1 to 20 with the proviso that for integer values of n equal to 1 or 2 all linkages between independent aromatic rings comprise at least one atom. The present invention includes a process for the preparation of poly(aryl ethers) from cyclic poly(aryl ether) oligomers. These low melt viscosity cyclic oligomers undergo ring opening and chain extension upon heating in the presence of a catalyst, forming high molecular weight linear polymers with no coproduct formation. Finished thermoplastic parts and composites may be prepared using this technology with processing techniques normally restricted to thermosetting monomers.

机译：本发明涉及环状聚（芳基醚）低聚物及其混合物，以及在高度稀释的反应介质中在有利于低聚合度下闭环的反应条件下在高度稀释的反应介质中制备其的方法。这些低聚物由通式表示，其中每个Y是二价氧或二价硫，每个Ar是芳族双自由基，其包含一个或多个C 6至C 20亚芳基，并且具有至少一个吸电子基团连接在芳族环上。 ;并且n是1至20的整数，条件是对于n等于1或2的整数，独立的芳环之间的所有键均包含至少一个原子。本发明包括由环状聚（芳基醚）低聚物制备聚（芳基醚）的方法。这些低熔体粘度的环状低聚物在催化剂的存在下加热时经历开环和扩链，形成没有副产物形成的高分子量线性聚合物。可以使用此技术以及通常限于热固性单体的加工技术来制备成品热塑性零件和复合材料。

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公开/公告号AU632609B2

专利类型
公开/公告日1993-01-07

原文格式PDF
申请/专利权人 THE DOW CHEMICAL COMPANY;
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申请/专利号AU19900060908
发明设计人 MICHAEL J. MULLINS;EDMUND P. WOO;
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申请日1990-08-13
分类号C07C49/84;C07D323/00;C07D327/00;C08G65/40;C08G73/06;C08G73/10;C08G73/18;C08G73/22;C08G75/00;C08G75/02;C08G75/20;C08L71/00;C08L71/08;C08L71/10;C08L79/04;C08L79/08;C08L81/00;C08L81/02;C08L81/06;
国家 AU
入库时间 2022-08-22 05:07:44

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