Patents Assigned to H.A. International LLC
  • Foundry binder and process
    Patent number: 6509392
    Abstract: No-bake foundry binders that produce foundry shapes with improved hot strength are provided. The binder comprises a polyether polyol component, a polyisocyanate component and a catalyst component that promotes the trimerization of polyisocyanates to polyisocyanurates. Supplemental catalysts that promote the reaction of the isocyanate with the polyols may also be used. Foundry mixes are prepared by mixing the binder with a foundry aggregate and making foundry shapes using the no-bake process.
    Type: Grant
    Filed: January 25, 2000
    Date of Patent: January 21, 2003
    Assignee: H.A. International LLC
    Inventors: Satish S. Jhaveri, Frank Mancina, Anita F. Aranha, Calvin K. Johnson