Patents by Inventor Ralph F. Patella

Ralph F. Patella 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).

  • Process for preparing multifunctional acrylate-modified vinyl ester-alkyl acrylate/methacrylate copolymer coagulum-free latex
    Patent number: 4151146
    Abstract: A process for preparing multifunctional acrylate modified-vinyl ester-alkyl acrylate/methacrylate copolymer coagulum-free latex is disclosed which comprises emulsion-polymerizing a non-pre-emulsified mixture of:(i) from about 40% to about 95% based on total weight of comonomers of a vinyl ester,(ii) from about 5% to about 35% based on total weight of comonomers of an ester derived from the reaction of a monohydric alcohol and acrylic acid or methacrylic acid, and(iii) from about 0.5% to about 10.0% based on total weight of comonomers of an ester derived from the reaction of a polyhydric alcohol and an acid selected from the group consisting of acrylic acid and methacrylic acid, there being at least two hydroxyl groups of the alcohol esterified with the acid,In the presence of a free radical polymerization catalyst and a chain transfer agent.
    Type: Grant
    Filed: December 1, 1977
    Date of Patent: April 24, 1979
    Assignee: Celanese Corporation
    Inventor: Ralph F. Patella
  • Use of multifunctional monomers in the preparations of emulsions to be used in adhesives
    Patent number: 4113540
    Abstract: This invention relates to novel adhesive compositions and laminates produced therefrom, said adhesive comprising a vinyl acetate-acrylate or methacrylate emulsion polymer with a content of an ethylenically unsaturated acid ester of a polyol containing at least three hydroxyl groups, said ester should also include at least three unsaturated acid moieties.
    Type: Grant
    Filed: December 2, 1977
    Date of Patent: September 12, 1978
    Assignee: Celanese Corporation
    Inventors: Ralph F. Patella, Edward J. Kuzma
  • 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
  • Aqueous dispersions of vinyl acetate/polyacrylate ester of pentaerythritol/hydroxymethyl diacetone acrylamide copolymers having improved adhesion properties
    Patent number: 4022743
    Abstract: Vinyl acetate based aqueous dispersion having improved wet adhesion properties are prepared by copolymerizing vinyl acetate with about 3 to about 10 percent by weight of a polyacrylate ester and about 0.5 to 3 percent by weight of hydroxymethyl diacetone acrylamide, said percentages being based on the total weight of the copolymer. Optionally, other monomers copolymerizable therewith can be included in the copolymer. Aqueous dispersions of this invention have utility as vehicles in protective coating formulations.
    Type: Grant
    Filed: November 28, 1975
    Date of Patent: May 10, 1977
    Assignee: Celanese Corporation
    Inventors: Ralph F. Patella, Joseph A. Vona
  • Dispersion polymerization process using hydroxyalkyl acrylate as protective colloids
    Patent number: 3957711
    Abstract: Aqueous dispersions of synthetic polymers have been made by polymerizing ethylenically unsaturated monomers in water in the presence of a protective colloid which is a polymer of a hydroxyalkyl acrylate or methacrylate. Such aqueous dispersions are useful in paints, adhesives and textile applications.
    Type: Grant
    Filed: December 20, 1974
    Date of Patent: May 18, 1976
    Assignee: Celanese Coatings & Specialties Company
    Inventors: Thomas M. Powanda, Ralph F. Patella, Edward J. Kuzma