Patents by Inventor Benny B. Gammill

Benny B. Gammill has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4751280
    Abstract: Epoxy resins are prepared by (a) adding an alkali metal hydroxide solution to a mixture containing an excess of an epihalohydrin, a phenolic hydroxyl-containing or an aromatic amine-containing compound and an organic solvent which codistills with water and the epihalohydrin, (b) conducting the reaction under reduced pressure while continuously removing water by codistillation, (c) separating the water from the distillate and returning the epihalohydrin and organic solvent to the reaction mixture, (d) drying the reaction mixture, (e) removing insoluble materials by suitable mechanical separation means, (f) washing the resin/epihalohydrin/organic solvent mixture with water so as to substantially remove water soluble materials, (g) drying the epihalohydrin/resin mixture, and (h) recovering the resultant epoxy resin from the resin/epihalohydrin/organic solvent mixture by any suitable means. This process produces an epoxy resin which is low in hydrolyzable halide and total halide.
    Type: Grant
    Filed: August 19, 1987
    Date of Patent: June 14, 1988
    Assignee: The Dow Chemical Company
    Inventors: Ha Q. Pham, Benny B. Gammill