Patents Assigned to Copolymer Rubber
  • Olefinic impact modifiers for, and blends with, thermoplastic polyester resins
    Patent number: 5314948
    Abstract: Thermoplastic polyester, copolyester and polyblend molding compositions impact-modified by glycidyl methacrylate grafted EPDM exhibit high impact strength combined with good knit-line characteristics, when the grafted comonomer content exceeds 2 percent by weight in the impact modifier, it has a gel content in the range of from about 10 to about 80 weight percent.
    Type: Grant
    Filed: June 24, 1991
    Date of Patent: May 24, 1994
    Assignees: Copolymer Rubber, Chemical Corporation
    Inventors: Charles F. Pratt, Shrikant V. Phadke, Errol Olivier