Crystallizable polyetherimides, method of manufacture, and articles derived therefrom

Crystallizable polyetherimides, method of manufacture, and articles derived therefrom

  • CN 101,809,067 B
  • Filed: 07/28/2008
  • Issued: 04/29/2015
  • Est. Priority Date: 07/26/2007
  • Status: Active Grant
First Claim
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1. a composition, it comprises the crystallizable PEI coming from following substances:

  • (a) 4,4`-bisphenol A dianhydride component, containing being more than or equal to 96.8mol%4,4`-bisphenol A dianhydride;

    (b) p-phenylenediamine (PPD), wherein said p-phenylenediamine (PPD) comprises and is less than 5.0mol% m-phenylene diamine (MPD), based on the total mole number of diamines;

    The T of wherein said crystallizable PEI mfor 250-400 DEG C, and the difference of Tm and the Tg of described composition is equal to or greater than 50 DEG C.

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