Patents Represented by Attorney, Agent or Law Firm S. Bruce Brown
  • Solventless preparation of phthalimides
    Patent number: 6066743
    Abstract: A method for the solventless synthesis of a phthalimide or phthalimide mixture is provided comprising contacting at least one amine reactant and at least one anhydride reactant in a solventless environment at a first temperature sufficient to allow the reactants to at least partially condense; and increasing the temperature to a second temperature sufficient to melt the reaction mixture, thereby allowing the reaction to go essentially to completion and form the reaction product.
    Type: Grant
    Filed: May 7, 1999
    Date of Patent: May 23, 2000
    Assignee: General Electric Company
    Inventors: Robert Joseph Nick, Mark Erik Nelson, Joseph John Caringi, Drew Elliot Williams
  • Carboxy-functionalized polyphenylene ethers and blends containing them
    Patent number: 6063875
    Abstract: Carboxy-functionalized polyphenylene ethers containing structural units with a carboxyalkyl group in the 2-position are prepared by redistribution of a polyphenylene ether with a 2-carboxyalkylphenol such as 2-(3-carboxypropyl)phenol (melilotic acid), or by oxidative coupling of a suitable phenol with such a 2-carboxyalkylphenol. The products form compatibilizing copolymers with polymers containing carboxylic acid-reactive functional groups, such as polyesters, polyamides and epoxy resins.
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: May 16, 2000
    Assignee: General Electric Company
    Inventors: Gary William Yeager, Yiqun Pan
  • Copolyetherimides with resistance to high temperatures
    Patent number: 6020456
    Abstract: Copolyetherimides are prepared by conventional means from hindered diamines such as the isomeric methyl-4,6-diethyl-1,3-phenylenediamines and bis(2-chloro-4-amino-3,5-diethylphenyl)methane. They have unusually high glass transition temperatures.
    Type: Grant
    Filed: November 6, 1998
    Date of Patent: February 1, 2000
    Assignee: General Electric Company
    Inventors: Daniel Joseph Brunelle, Tina Lynn Grubb, Gordon Lee Tullos