Patents Represented by Attorney Richard W. Nanfeldt

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  • Cationic polymerization catalyst
    Patent number: 4029866
    Abstract: High molecular weight polymers and highly unsaturated polymers (e.g. butyl rubber) are prepared by homopolymerizing and copolymerizing olefins, isoolefins, conjugated multiolefins, or mixtures of isoolefins and conjugated multiolefins with a catalyst system comprising an organoaluminum compound in conjunction with a cocatalyst selected from the group consisting of sulfur dioxide, sulfur trioxide, halogens, mixed halogens and hypohalides.
    Type: Grant
    Filed: January 28, 1972
    Date of Patent: June 14, 1977
    Assignee: Exxon Research and Engineering Company
    Inventor: Joseph P. Kennedy