Patents Represented by Attorney Roger K. Hsu

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  • Method for continuous production of invert emulsion polymers
    Patent number: 4419466
    Abstract: Invert emulsion polymers are prepared by continuously circulating a system comprising a non-polar liquid and an aqueous solution of polymerizable monomers, continuously adding components to said system and continuously withdrawing a portion of said system comprising the desired invert emulsion polymer. The method is conveniently effected in a loop reactor. It is particularly effective for the production of invert emulsion polymers of acrylamidoalkanesulfonic acids and their salts; e.g., 2-acrylamido-2-methylpropanesulfonic acid.
    Type: Grant
    Filed: June 25, 1981
    Date of Patent: December 6, 1983
    Assignee: The Lubrizol Corporation
    Inventor: Thomas R. Hopkins