Patents Assigned to Kraton Polymer US L.L.C.
  • Butadiene polymers having terminal functional groups
    Patent number: RE39559
    Abstract: Hydrogenated butadiene polymers having terminal functional groups have minimum viscosity at any molecular weight when the 1,2-addition is between 30% and 70%. Hydrogenated butadiene polymers having about two terminal hydroxyl groups per molecule have surprisingly lower viscosities at 30% to 70% 1,2-addition than similar polymers having either higher or lower amounts of 1,2-addition. The polymers are useful in making coatings, sealants, binders, and block copolymers with polyesters, polyamides, and polycarbonates.
    Type: Grant
    Filed: September 5, 2003
    Date of Patent: April 10, 2007
    Assignee: Kraton Polymer US L.L.C.
    Inventors: Dale L. Handlin, Jr., Daniel E. Goodwin, Carl L. Willis, David J. St. Clair, John D. Wilkey, Michael J. Modic, Craig A. Stevens