Patents by Inventor Roger M. Christenson

Roger M. Christenson 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: 4303764
    Abstract: Pigment dispersants for use in coating compositions wherein the dispersant is the polymerization product of (i) an alkyl methacrylate having from 3 to 8 carbon atoms in the alkyl group, (ii) a hardening monomer selected from the group consisting of a styrene, methyl methacrylate, ethyl methacrylate and mixtures thereof, (iii) an ethylenically unsaturated carboxylic acid selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid, fumaric acid and mixtures thereof or a monomer having a double bond alpha-beta to a carbonyl group and which provides carboxyl functionality when reacted with water, alcohol, amine or anhydride, (iv) a monomer having a double bond alpha-beta to a carbonyl group and at least one hydroxyl group or a monomer which provides such groups when further reacted with an acid or an epoxide, and (v) a compound providing an amine or amine salt functional moiety.
    Type: Grant
    Filed: July 7, 1980
    Date of Patent: December 1, 1981
    Assignee: PPG Industries, Inc.
    Inventors: David Z. Becher, Roger M. Christenson, Richard L. Coalson, Percy E. Pierce, Karl F. Schimmel
  • Patent number: 4302562
    Abstract: Pigment dispersants for use in coating compositions wherein the dispersant is the polymerization product of (i) an alkyl methacrylate having from 3 to 8 carbon atoms in the alkyl group, (ii) a hardening monomer selected from the group consisting of a styrene, methyl methacrylate, ethyl methacrylate and mixtures thereof, (iii) an ethylenically unsaturated carboxylic acid selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid, fumaric acid and mixtures thereof or a monomer having a double bond alpha-beta to a carbonyl group and which provides carboxyl functionality when reacted with water, alcohol, amine or anhydride, (iv) a monomer having a double bond alpha-beta to a carbonyl group and at least one hydroxyl group or a monomer which provides such groups when further reacted with an acid or an epoxide, and (v) a compound providing an amine or amine salt functional moiety.
    Type: Grant
    Filed: August 14, 1980
    Date of Patent: November 24, 1981
    Assignee: PPG Industries, Inc.
    Inventors: David Z. Becher, Roger M. Christenson, Richard L. Coalson, Percy E. Pierce, Karl F. Schimmel
  • Patent number: 4302561
    Abstract: Pigment dispersants for use in coating compositions wherein the dispersant is the polymerization product of (i) an alkyl methacrylate having from 3 to 8 carbon atoms in the alkyl group, (ii) a hardening monomer selected from the group consisting of a styrene, methyl methacrylate, ethyl methacrylate and mixtures thereof, (iii) an ethylenically unsaturated carboxylic acid selected from the group consisting of acrylic acid, methacrylic acids, itaconic acid, crotonic acid, maleic acid, fumaric acid and mixtures thereof or a monomer having a double bond alpha-beta to a carbonyl group and which provides carboxyl functionality when reacted with water, alcohol, amine or anhydride, (iv) a monomer having a double bond alpha-beta to a carbonyl group and at least one hydroxyl group or a monomer which provides such groups when further reacted with an acid or an epoxide, and (v) a compound providing an amine or amine salt functional moiety.
    Type: Grant
    Filed: August 14, 1980
    Date of Patent: November 24, 1981
    Assignee: PPG Industries, Inc.
    Inventors: David Z. Becher, Roger M. Christenson, Richard L. Coalson, Percy E. Pierce, Karl F. Schimmel
  • Patent number: 4302560
    Abstract: Pigment dispersants for use in coating compositions wherein the dispersant is the polymerization product of (i) an alkyl methacrylate having from 3 to 8 carbon atoms in the alkyl group, (ii) a hardening monomer selected from the group consisting of a styrene, methyl methacrylate, ethyl methacrylate and mixtures thereof, (iii) an ethylenically unsaturated carboxylic acid selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid, fumaric acid and mixtures thereof or a monomer having a double bond alpha-beta to a carbonyl group and which provides carboxyl functionality when reacted with water, alcohol, amine or anhydride, (iv) a monomer having a double bond alpha-beta to a carbonyl group and at least one hydroxyl group or a monomer which provides such groups when further reacted with an acid or an epoxide, and (v) a compound providing an amine or amine salt functional moiety.
    Type: Grant
    Filed: August 14, 1980
    Date of Patent: November 24, 1981
    Assignee: PPG Industries, Inc.
    Inventors: David Z. Becher, Roger M. Christenson, Richard L. Coalson, Percy E. Pierce, Karl F. Schimmel
  • Patent number: 4298511
    Abstract: Rheology modifiers useful in water-and organic solvent-based compositions are derived from the reaction of polyalkylene oxide, polyfunctional material, diisocyanate and water. The modifiers are characterized by having a branched structure and containing substantially no terminal hydrophobic groups.
    Type: Grant
    Filed: August 1, 1980
    Date of Patent: November 3, 1981
    Assignee: PPG Industries, Inc.
    Inventors: Karl F. Schimmel, Jerome A. Seiner, Rostyslaw Dowbenko, Roger M. Christenson
  • Patent number: 4289674
    Abstract: An aqueous resinous dispersion and a method of coating employing the aqueous resinous dispersion are disclosed. The aqueous resinous dispersions are solubilized with base and comprise an acrylic polymer containing N-ethoxymethylacrylamide or methacrylamide moieties and an epoxy resin. The dispersion is useful for coating metal containers particularly as a coating for the interior of containers which are used for alcoholic beverages, for example, beer cans.
    Type: Grant
    Filed: July 9, 1979
    Date of Patent: September 15, 1981
    Assignee: PPG Industries, Inc.
    Inventors: Roger M. Christenson, Rudolf Maska, Rostyslawa Dowbenko, Thomas R. Hockswender
  • Patent number: 4260716
    Abstract: Quaternary ammonium hydroxide-containing polymers and their use in coating applications are disclosed. The quaternary ammonium hydroxide-containing polymers are prepared from reacting a polyglycidyl ether of a cyclic polyol with a tertiary amine in the presence of a sufficient amount of water for the formation of quaternary hydroxide groups.The quaternary ammonium hydroxide-containing polymers are particularly good as electrocoating resins in that they electrodeposit without generating acid counterion. They are also good in other conventional coating applications such as dip, flow, spray and roll coating in that the resulting coating can be baked without the generation of corrosive acid.
    Type: Grant
    Filed: May 7, 1979
    Date of Patent: April 7, 1981
    Assignee: PPG Industries, Inc.
    Inventors: Roger M. Christenson, Joseph F. Bosso, Marvis E. Hartman, Wen-Hsuan Chang
  • Patent number: 4256560
    Abstract: Curable resinous compositions containing primary and/or secondary amine groups which are non-volatile under curing conditions and containing alpha, beta-ethylenically unsaturated moieties in conjugation with carbonyl moieties which are reacted with a primary and/or secondary amine which are volatile under curing conditions are disclosed. The compositions are depositable on a substrate to form films.
    Type: Grant
    Filed: September 19, 1979
    Date of Patent: March 17, 1981
    Assignee: PPG Industries, Inc.
    Inventors: Stephen L. Buchwalter, Robert D. Jerabek, Lee-Pei H. Chou, Roger M. Christenson
  • Patent number: 4252935
    Abstract: Esters of glycidyl polyethers of saturated phenols are especially useful in coating compositions having a low organic solvent content. The esters are the reaction products of from about 0.5 to about 1.5 equivalents of a saturated monocarboxylic acid with each epoxy group in a diglycidyl polyether of phenols where the aromatic rings of the phenols are saturated.
    Type: Grant
    Filed: July 31, 1979
    Date of Patent: February 24, 1981
    Assignee: PPG Industries, Inc.
    Inventors: Carl C. Anderson, William J. Birkmeyer, Roger M. Christenson, Rostyslaw Dowbenko, Ronald J. Lewarchik
  • Patent number: 4248753
    Abstract: Resinous compositions which are the Michael adducts of primary and/or secondary amines and polymers containing alpha, beta-ethylenically unsaturated moieties in conjugation with carbonyl moieties are disclosed. The compositions are depositable on substrates to form films. The films are amenable to oxidative and aminoplast cures and cure with light color. The compositions are desirable for use in cationic electrodeposition.
    Type: Grant
    Filed: August 28, 1978
    Date of Patent: February 3, 1981
    Assignee: PPG Industries, Inc.
    Inventors: Stephen L. Buchwalter, Joseph F. Bosso, Roger M. Christenson
  • Patent number: 4225480
    Abstract: Amine group-containing addition interpolymers having improved stability under conditions of storage and use are prepared by interpolymerizing at least one polymerizable ethylenically unsaturated carboxylic acid monomer and at least one polymerizable ethylenically unsaturated aminolysis-resistant organic monomer to form an addition interpolymer containing carboxyl groups pendent to the polymer chain and aminolysis-resistant organic groups pendent to the polymer chain, following which a portion of the pendent carboxyl groups of the addition interpolymer are reacted with an alkylenimine to form pendent amine groups and a portion of the pendent carboxyl groups of the addition interpolymer are neutralized with a basic compound to form pendent anionic salt groups. The addition interpolymer is preferably reducible with organic solvents, water or a mixture thereof, and can be utilized as pigment grinding vehicles or they can be formulated with conventional additives to form useful coating compositions.
    Type: Grant
    Filed: July 31, 1978
    Date of Patent: September 30, 1980
    Assignee: PPG Industries, Inc.
    Inventors: Karl F. Schimmel, Roger M. Christenson, Jerome A. Seiner, James A. Claar
  • Patent number: 4222911
    Abstract: Coating compositions containing polyester diol extended uralkyd resins form flexible coatings. Such uralkyd resins are prepared by reacting oil modified alkyd resin, polyester diol having a number average molecular weight in the range of from about 800 to about 4000, and diisocyanate.
    Type: Grant
    Filed: August 7, 1978
    Date of Patent: September 16, 1980
    Assignee: PPG Industries, Inc.
    Inventors: Roger M. Christenson, J. Alden Erikson
  • Patent number: 4221885
    Abstract: Amine group-containing addition interpolymers having improved stability under conditions of storage and use are prepared by interpolymerizing at least one polymerizable ethylenically unsaturated carboxylic acid monomer and at least one polymerizable ethylenically unsaturated aminolysis-resistant organic monomer to form an addition interpolymer containing carboxyl groups pendent to the polymer chain and aminolysis-resistant organic groups pendent to the polymer chain, following which a portion of the pendent carboxyl groups of the addition interpolymer are reacted with an alkylenimine to form pendent amine groups and a portion of the pendent carboxyl groups of the addition interpolymer are neutralized with a basic compound to form pendent anionic salt groups.
    Type: Grant
    Filed: September 6, 1978
    Date of Patent: September 9, 1980
    Assignee: PPG Industries, Inc.
    Inventors: Karl F. Schimmel, Roger M. Christenson, Jerome A. Seiner, James A. Claar
  • Patent number: 4198331
    Abstract: Curable resinous compositions containing primary and/or secondary amine groups which are non-volatile under curing conditions and containing alpha, beta-ethylenically unsaturated moieties in conjugation with carbonyl moieties which are reacted with a primary and/or secondary amine which are volatile under curing conditions are disclosed. The compositions are depositable on a substrate to form films.
    Type: Grant
    Filed: August 28, 1978
    Date of Patent: April 15, 1980
    Assignee: PPG Industries, Inc.
    Inventors: Stephen L. Buchwalter, Robert D. Jerabek, Lee-Pei H. Chou, Roger M. Christenson
  • Patent number: 4153545
    Abstract: A method of cleaning a membrane such as an ultrafilter which has been used in the treatment of a cataphoretic paint is disclosed. The method involves treating the membrane with an aqueous solution of an acid, a fatty amine and a water-soluble organic solvent.
    Type: Grant
    Filed: August 18, 1977
    Date of Patent: May 8, 1979
    Assignee: PPG Industries, Inc.
    Inventors: Robert R. Zwack, Roger M. Christenson
  • Patent number: 4141810
    Abstract: A method of cationic electrodeposition on an electroconductive substrate is disclosed. The method of the invention employs as the electrocoating vehicle an aqueous dispersion of a quaternary ammonium carbonate-containing resin. Electrodeposition of the resin is accomplished without generating harmful acid from the counter ion. The carbonate counter ion is continuously evolved from the electrodeposition bath at the anode as carbon dioxide.The quaternary ammonium carbonate-containing polymers are also useful as feed resins for controlling the pH of aqueous dispersions of acidified cationic resins used in electrodeposition. Upon electrodeposition, these resins generate acid which can build up to undesirable levels in the electrodeposition bath. The quaternary ammonium carbonate-containing polymers are relatively basic and when fed into the bath react with the acid to form the corresponding quaternary ammonium salt of the acid releasing carbon dioxide.
    Type: Grant
    Filed: March 23, 1978
    Date of Patent: February 27, 1979
    Assignee: PPG Industries, Inc.
    Inventors: Stephen L. Buchwalter, Joseph F. Bosso, Roger M. Christenson
  • Patent number: 4136025
    Abstract: A method of cleaning a membrane such as an ultrafilter which has been used in the treatment of a cataphoretic paint containing lead is disclosed. The method involves treating the membrane with an aqueous solution of an acid which forms a water-soluble lead salt and a water-soluble organic solvent.
    Type: Grant
    Filed: August 18, 1977
    Date of Patent: January 23, 1979
    Assignee: PPG Industries, Inc.
    Inventors: Robert R. Zwack, Roger M. Christenson
  • Patent number: 4129489
    Abstract: A novel method of preparing polymer based powder coating compositions involves as a first step the preparation of a mixture containing one or more ethylenically unsaturated monomers which are polymerizable by ionizing radiation, and optionally other coating composition additives. Optional additives which may be incorporated in the mixture include pigments, internal or external crosslinkers, chain transfer agents, flow promoters, plasticizers, viscosity control agents, minor proportions of resins, and the like. Pigments are especially desirable additives. The next step in the process is to apply a coating of the mixture to a substrate. Then, the coated substrate is subjected to ionizing radiation to polymerize the ethylenically unsaturated monomers and thereby form a solid film. Finally, the film is broken into particles by any of several mechanical means to form a polymer based powder coating composition which when applied to a substrate and baked, fuses to produce a film.
    Type: Grant
    Filed: April 24, 1978
    Date of Patent: December 12, 1978
    Assignee: PPG Industries, Inc.
    Inventors: Roger M. Christenson, Rostyslaw Dowbenko, Joseph M. Makhlouf
  • Patent number: 4102863
    Abstract: A method of cationic electrodeposition on an electroconductive substrate is disclosed. The method of the invention employs as the electrocoating vehicle an aqueous dispersion of a quaternary ammonium carbonate-containing resin. Electrodeposition of the resin is accomplished without generating harmful acid from the counter ion. The carbonate counter ion is continuously evolved from the electrodeposition bath at the anode as carbon dioxide.The quaternary ammonium carbonate-containing polymers are also useful as feed resins for controlling the pH of aqueous dispersions of acidified cationic resins used in electrodeposition. Upon electrodeposition, these resins generate acid which can build up to undesirable levels in the electrodeposition bath. The quaternary ammonium carbonate-containing polymers are relatively basic and when fed into the bath react with the acid to form the corresponding quaternary ammonium salt of the acid releasing carbon dioxide.
    Type: Grant
    Filed: November 24, 1976
    Date of Patent: July 25, 1978
    Assignee: PPG Industries, Inc.
    Inventors: Stephen L. Buchwalter, Joseph F. Bosso, Roger M. Christenson
  • Patent number: 4097438
    Abstract: Water-based coating compositions for use as internal sanitary liners for metal containers containing beer, carbonated and non-carbonated soft drinks, and fruit juices consist essentially of aqueous dispersions of amine-solubilized interpolymers, and interpolymers being formed from substituted carboxylic acid amide units; ethylenically unsaturated acid units; hardening units from monomers such as styrene, vinyl toluene or alkyl methacrylates having from 1 to 4 carbon atoms and flexibilizing units from certain alkyl acrylates or methacrylates. The interpolymers are solubilized by neutralizing the acid units of the interpolymer with monomeric amines. In order to produce a stable composition, the amount of amine utilized in neutralizing the acid groups of the interpolymer should be sufficient to produce at least 0.200 milliequivalents of salt per gram of resin solids.
    Type: Grant
    Filed: August 5, 1974
    Date of Patent: June 27, 1978
    Assignee: PPG Industries, Inc.
    Inventors: Roger M. Christenson, Rudolf Maska