Patents Assigned to DSM Copolymer
  • Continuous process for producing adducted EPM or EPDM oil solution
    Patent number: 5384371
    Abstract: The present invention provides a continuous process for producing an adducted derivatized EPM or EPDM oil solution in which a grafted ethylene polymer is adducted with an antioxidant diamine for formation of an adduct during holding.
    Type: Grant
    Filed: April 5, 1993
    Date of Patent: January 24, 1995
    Assignee: DSM Copolymer, Inc.
    Inventors: Tony L. Caines, Michael L. Junker
  • Accelerator compositions and rubber compounding composition embodying the same
    Patent number: 5354793
    Abstract: An accelerator composition and a rubber compounding composition in which a rubber is blended with a combination of three accelerators and sulfur for curing the rubber while minimizing the formation of iridescent sheen. The combination of accelerators included a thiolated morpholine, a dithiocarbamate and a benzothiazole.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: October 11, 1994
    Assignee: DSM Copolymer, Inc.
    Inventor: John C. Hudson
  • Weather and heat resistant blended nitrile polymers
    Patent number: 5266640
    Abstract: An ozone and heat resistant polymer blend prepared from a first solid, high acrylonitrile nitrile/conjugated diene copolymer and a second, solid, fully hydrogenated nitrile/conjugated diene copolymer, blended in a ratio of about 70:30 to about 50:50.
    Type: Grant
    Filed: February 14, 1991
    Date of Patent: November 30, 1993
    Assignee: DSM Copolymer, Inc.
    Inventors: Rudolph Karg, Connie L. Hill