Patents Assigned to GAF Chemicals Corporation
  • Patent number: 4900520
    Abstract: A process for the neutralization, clarification and decolorization of organosilanes or organosilicones derived from the reaction of an organosilane or a hydropolysiloxane with an aliphatically unsaturated compound in the presence of an acidic platinum catalyst, a process for the conversion of a soluble platinum catalyst into an insoluble form and a process for the recovery of a platinum catalyst from an insoluble anion exchange resin which comprises:(a) contacting a reaction mixture of the organosilane or organosilicone with a basic anionic exchange resin having a free amino or quaternized ammonium salt functionality in an insoluble polymeric matrix under conditions suitable to bind the soluble platinum catalyst to said resin;(b) separating said resin containing bound platinum catalyst from the organosilane or organosilicone reaction mixture and, optionally,(c) treating the separated resin with an inorganic base to convert the bound platinum catalyst to a recoverable salt or(d) subjecting the resin containing
    Type: Grant
    Filed: October 31, 1988
    Date of Patent: February 13, 1990
    Assignee: GAF Chemicals Corporation
    Inventors: Basil A. Behnam, Rastko Vukov
  • Patent number: 4900809
    Abstract: Substantially benzene-free copolymers of maleic anhydride and alkyl vinyl ethers having benzene present in an amount of less than about 1 ppm and an alkyl-substituted aromatic hydrocarbon present in an amount of about 2.0 wt. % or less, and a process for rendering a copolymer reaction product of maleic anhydride and an alkyl vinyl ether prepared in benzene solution substantially benzene-free, is described herein.
    Type: Grant
    Filed: March 13, 1989
    Date of Patent: February 13, 1990
    Assignee: GAF Chemicals Corporation
    Inventors: Mohammed Tazi, Robert B. Login, Nikhil Kundel
  • Patent number: 4885371
    Abstract: The present invention relates to a process for the selective preparation of an N-alkyl lactam having minimal coloration by reacting the corresponding lactone with an alkyl amine in the presence of a catalytic amount of an ammonium, alkali metal or alkaline earth metal borohydride.
    Type: Grant
    Filed: June 22, 1989
    Date of Patent: December 5, 1989
    Assignee: GAF Chemicals Corporation
    Inventors: David J. Tracy, Mohamed M. Hashem