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Process for injection molding of polyethylene terephthalate compositions at reduced mold temperature

  • US 4,313,903 A
  • Filed: 11/19/1979
  • Issued: 02/02/1982
  • Est. Priority Date: 11/19/1979
  • Status: Expired due to Term
First Claim
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1. A process for injection molding a thermoplastic composition comprising:

  • (a) intimately blending (i) from 80 to 97% by weight of a polyethylene terephthalate having an intrinsic viscosity of at least 0.3 dl/g measured as a 0.5% by solution in in a 1;

    1 mixture of phenol and tetrachloroethane at 25°

    C.; and

    (ii) from 3 to 20% by weight of an organic compound containing at least one imide group and having a melting point greater than 240°

    C., and(b) injecting molding said blend into a mold held at a temperature of no more than 110°

    C. and of no less than 80°

    C.

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