×

METHOD OF MAKING A POLY(PHENYLENE ETHER) AND POLY(PHENYLENE ETHER) PREPARED THEREBY

  • US 20200131311A1
  • Filed: 10/10/2019
  • Published: 04/30/2020
  • Est. Priority Date: 10/30/2018
  • Status: Abandoned Application
First Claim
Patent Images

1. A method of making a poly(phenylene ether), the method comprising:

  • oxidatively polymerizing a combination comprising, based on the total weight of the combination,90 to 99.5 weight percent of a phenolic monomer; and

    0.5 to 10 weight percent of a monofunctional phenylene ether oligomer having an intrinsic viscosity of less than 0.2 deciliters per gram, determined at 25°

    C. in chloroform by Ubbelohde viscometer;

    in the presence of an organic solvent and a copper-amine catalyst;

    terminating the oxidative polymerization to form a post-termination reaction mixture;

    combining an aqueous solution comprising a chelant with the post-termination reaction mixture to form a chelation mixture comprisingan aqueous phase comprising chelated copper ion, andan organic phase comprising dissolved poly(phenylene ether);

    separating the aqueous phase and the organic phase; and

    isolating the poly(phenylene ether) from the organic phase.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×