Patents Assigned to Delta Oil Products Corporation
  • Low emission foundry binder system
    Patent number: 4311631
    Abstract: Foundary binder, substantially free of inert hydrocarbon solvents, is comprised of a mixture of low molecular weight methylolated phenolic components and a reactive diluent. The binder is mixed with sand and cured with a polyisocyanate in the presence of a catalyst.
    Type: Grant
    Filed: September 20, 1979
    Date of Patent: January 19, 1982
    Assignee: Delta Oil Products Corporation
    Inventors: Marion M. Myers, William J. Tellefsen
  • Binder for foundry process
    Patent number: 4148777
    Abstract: An improved binder composition for use in the foundry process comprises a mixture of low molecular weight essentially mononuclear methylolated phenols which are cured through a reaction with a polyisocyanate. In the preferred embodiment, a minor amount of polyether polyol, a mutual solvent and a catalyst, preferably an amine catalyst, is mixed with the phenolic component.
    Type: Grant
    Filed: May 9, 1977
    Date of Patent: April 10, 1979
    Assignee: Delta Oil Products Corporation
    Inventors: Russell A. LaBar, Jordan J. Kopac
  • Improved foundry process and binder resin composition therefor
    Patent number: 4079031
    Abstract: An improved binder resin is disclosed for use in a foundry process, comprising a major proportion of a resole phenolic resin and a minor proportion of a polyether polyol and a mutual solvent therefor, wherein the polyol has an average molecular weight between about 200 and 5000 and a hydroxy functionality of about 2 to 4. The improved binder is used in the foundry process by mixing it with a polyisocyanate and preferably an amine catalyst.
    Type: Grant
    Filed: July 14, 1976
    Date of Patent: March 14, 1978
    Assignee: Delta Oil Products Corporation
    Inventors: Kashinath S. Sardessai, Jordan J. Kopac