Patents by Inventor Charles A. DeFazio

Charles A. DeFazio 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).

  • Preparation of high molecular weight polyacrylates by inverse emulsion polymerization
    Patent number: 4656222
    Abstract: Water soluble salts of acrylic acid are polymerized and co-polymerized with acrylamide by an inverse emulsion polymerization in a water/hydrocarbon emulsion without catalyst to yield high molecular weight polymers.
    Type: Grant
    Filed: May 16, 1985
    Date of Patent: April 7, 1987
    Assignee: Celanese Corporation
    Inventor: Charles A. DeFazio
  • Incorporation of multifunctional monomers (PETA, TMPTA, and HDODA) in vinyl-acrylic emulsion polymers
    Patent number: 4056503
    Abstract: New emulsion polymers comprising vinyl acetate-acrylate or methacrylate emulsion polymer containing in the polymer an .alpha.,.beta.-ethylenically unsaturated acid ester of a polyol. For example, pentaerythritol tri- and tetra-acrylate, trimethylolpropane triacrylate, hexanediol diacrylate, etc.
    Type: Grant
    Filed: October 18, 1976
    Date of Patent: November 1, 1977
    Assignee: Celanese Corporation
    Inventors: Thomas M. Powanda, Ralph F. Patella, Joseph A. Vona, Charles A. DeFazio
  • Unsaturated polyesters for ultraviolet curable coatings
    Patent number: 3992276
    Abstract: An ultraviolet curable coating composition having improved clarity and resin compatability is prepared by co-reacting an acrylate or methacrylate co-polymer containing hydroxy and carboxy groups with added polyol and maleic anhydride to form an unsaturated polyester, and then blending the unsaturated polyester with polyunsaturated monomers, monounsaturated monomers and a photoinitiator, all of which will cure when exposed to ultraviolet radiation.
    Type: Grant
    Filed: March 17, 1975
    Date of Patent: November 16, 1976
    Assignee: Celanese Corporation
    Inventors: Thomas M. Powanda, Charles B. Rybny, Charles A. DeFazio