Material Contains A Nitrogen Atom As A Ring Member Of A Heterocyclic Ring Other Than Where Nitrogen Heterocycle Is Solely Part Of A Lactam Ring Patents (Class 528/314)
  • Quaternary ammonium catalyst system for the polymerization of 2-pyrrolidone
    Patent number: 4098774
    Abstract: The process of making a catalyst for the polymerization of 2-pyrrolidone by contacting an alkali metal pyrrolidonate, a quaternary ammonium halide and carbon dioxide in a mol ratio of about 1:0.1-2:0.1-0.5. The alkali metal pyrrolidonate may be prepared by reacting an alkali metal hydroxide with 2-pyrrolidone. The polymerization of 2-pyrrolidone in the presence of this catalyst system produces poly-2-pyrrolidone of high molecular weight.
    Type: Grant
    Filed: May 19, 1976
    Date of Patent: July 4, 1978
    Assignee: Chevron Research Company
    Inventor: Robert Bacsksai