Patents Issued in May 26, 1976
  • Process for improvement of impact strength in rubber-modified nitrile thermoplastics
    Patent number: 3959411
    Abstract: Improved impact strength of copolymers of acrylonitrile and styrene prepared in the presence of a diene rubber is achieved by presoaking the diene rubber with part of the acrylonitrile and styrene monomers prior to conducting the graft polymerization reaction.
    Type: Grant
    Filed: October 31, 1973
    Date of Patent: May 26, 1976
    Assignee: Standard Oil Company
    Inventors: June T. Duke, B. Frank Vincent, Jr., Bruce O. Budinger, James L. O'Kane