Patents Examined by J. E. Evan
  • Synthesis of hydroxyl-terminated polybutadienes using glycol ether solvents
    Patent number: 5043484
    Abstract: Disclosed is an improvement in a process for polymerizing 1,3-butadiene selectively to form relatively low molecular weight hydroxyl-terminated polybutadiene oligomers in the presence of an aqueous solution of hydrogen peroxide which comprises the use of a glycol ether solvent to produce butadiene oligomers having a high degree of OH functionality and suppression of formation of solid or gel-type insoluble rubber by-products.
    Type: Grant
    Filed: February 9, 1990
    Date of Patent: August 27, 1991
    Assignee: Texaco Chemical Company
    Inventors: John F. Knifton, Edward T. Marquis