Patents Examined by Richrd E. Schafer
  • Hydrolytically stable urethane foam precursors
    Patent number: 4032468
    Abstract: The hydrolytic stability of catalyst-containing precursors for both flexible and rigid polyurethane foams wherein the catalyst is a tin compound is considerably increased when the catalyst is a triorganotin compound wherein the hydrocarbon groups bonded to the tin atom are methyl or methoxymethyl.
    Type: Grant
    Filed: September 13, 1976
    Date of Patent: June 28, 1977
    Assignee: M & T Chemicals Inc.
    Inventors: Kenneth Treadwell, Melvin H. Gitlitz