Patents Represented by Attorney, Agent or Law Firm Robert E. McDonald
  • Patent number: 5662416
    Abstract: An automatic clamping apparatus for paint mixers which applies a direct downward force on a paint container to prevent movement during the mixing operation, includes a clamping plate, a linear actuator, and a current sensor. The clamping plate is secured to the moving end of a vertically aligned linear actuator which moves the clamping plate up and down onto a paint container. The current sensor detects when the clamping plate is pushing against the top of the paint container and the power to the actuator is adjusted accordingly to maintain securing force on the paint container.
    Type: Grant
    Filed: April 30, 1996
    Date of Patent: September 2, 1997
    Inventor: Edward Jefferson Dwigans, II
  • Patent number: 5632838
    Abstract: A continuous process for manufacturing a coated fiber reinforced pultruded article or coated extrudate and the coating composition for use in this process. The coating composition includes an isocyanate resin, at least one active hydrogen-containing resin and at least one solvent having an evaporation rate equal to or less than about 0.5. The process and coating composition of the present invention produce fiber reinforced plastic articles having smooth, adherent surface coatings.
    Type: Grant
    Filed: August 11, 1994
    Date of Patent: May 27, 1997
    Assignee: The Sherwin-Williams Company
    Inventor: Richard A. Weidner
  • Patent number: 5633091
    Abstract: An anhydride-functional polymer obtained by reacting under graft copolymerization reaction conditions,(A) an unsaturated polymer which was obtained by reacting under ene reaction conditions a mixture of reactants comprising:(i) an unsaturated anhydride having the structure: ##STR1## wherein R.sub.1 and R.sub.2 are each independently hydrogen, alkyl of 1 to about 6 carbons, or alkoxy of 1 to about 6 carbons, or a halogen; and(ii) at least one polyolefin having at least two carbon-carbon double bonds in the polyolefin backbone and having an average of at least three carbon atoms in the polyolefin backbone between the carbon-carbon double bonds; and(B) at least one ethylenically unsaturated monomer which is copolymerizable with the unsaturated polymer.
    Type: Grant
    Filed: August 26, 1996
    Date of Patent: May 27, 1997
    Assignee: The Sherwin-Williams Company
    Inventors: Rodney M. Harris, Mohamad D. Shalati, Joyce A. Bibeau
  • Patent number: 5633327
    Abstract: An unsaturated acid-functional monomer having the structure: ##STR1## wherein R.sup.1 is hydrogen or methyl and Z is nothing or is a divalent radical of 1 to about 20 carbons.
    Type: Grant
    Filed: April 22, 1996
    Date of Patent: May 27, 1997
    Assignee: The Sherwin-Williams Company
    Inventor: Rodney M. Harris
  • Patent number: 5627230
    Abstract: A continuous process for manufacturing a coated fiber reinforced pultruded article and the coating composition for use in this process. The coating composition includes an isocyanate resin, at least one active hydrogen-containing resin and at least one solvent having an evaporation rate equal to or less than about 0.5. The process and coating composition of the present invention produce fiber reinforced plastic articles having smooth, adherent surface coatings.
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: May 6, 1997
    Assignee: The Sherwin-Williams Company
    Inventor: Richard A. Weidner
  • Patent number: 5618884
    Abstract: Anhydride-functional polymerizable monomers having the structure: ##STR1## and polymers and reactive compositions prepared from these monomers are disclosed. The reactive compositions are especially useful in primer and clearcoat/basecoat applications.
    Type: Grant
    Filed: March 1, 1996
    Date of Patent: April 8, 1997
    Assignee: The Sherwin-Williams Company
    Inventors: Rubing Cai, Thomas W. Yokoyama
  • Patent number: 5614604
    Abstract: This invention relates to silicon-containing polyurethane thickeners having particular utility in paints and coatings comprising the reaction product of an isocyanate functional material, a polyether polyol, a monofunctional, active-hydrogen containing, hydrophobic endcapping material, a silane-functional material, and water.
    Type: Grant
    Filed: May 19, 1995
    Date of Patent: March 25, 1997
    Assignee: The Sherwin-Williams Company
    Inventor: Randolph B. Krafcik
  • Patent number: 5609963
    Abstract: Anhydride-functional polymerizable monomers having the structure: ##STR1## and polymers and reactive compositions prepared from these monomers are disclosed. The reactive compositions are especially useful in primer and clearcoat/basecoat applications.
    Type: Grant
    Filed: March 1, 1996
    Date of Patent: March 11, 1997
    Assignee: The Sherwin-Williams Company
    Inventors: Rubing Cai, Thomas W. Yokoyama
  • Patent number: 5591805
    Abstract: An anhydride-functional polymer is obtained by reacting under ene reaction conditions:(i) an unsaturated anhydride having the structure: ##STR1## wherein R.sub.1 and R.sub.2 are each independently hydrogen, alkyl of 1 to about 6 carbons, or alkoxy of 1 to about 6 carbons, or a halogen; and(ii) at least one polyolefin having at least two carbon-carbon double bonds in the polyolefin backbone and having an average of at least three carbon atoms in the polyolefin backbone between the carbon-carbon double bonds.
    Type: Grant
    Filed: February 15, 1996
    Date of Patent: January 7, 1997
    Assignee: The Sherwin-Williams Company
    Inventors: Mohamad D. Shalati, Rodney M. Harris, Joyce A. Bibeau, Richard S. Valpey, III
  • Patent number: 5591807
    Abstract: A coating composition having extended pot-life and excellent cure at ambient conditions. The coating composition comprises (i) at least one imine, (ii) a polyisocynate having an average of at least two isocyanate groups per molecule, (iii) at least one polyaspartic ester, and (iv) an anhydride functional polymer; wherein the coating composition is substantially free of hydroxy functionality.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: January 7, 1997
    Assignee: The Sherwin-Williams Company
    Inventors: Rubing Cai, Walter E. Hawrysko
  • Patent number: 5591793
    Abstract: Novel thixotropic alkyd resins are obtained by reacting at a temperature of between about 120.degree. C. to about 150.degree. C. for at least one hour (a) at least one alkyd resin and (b) a polyamide comprising the reaction product of: (i) a polycarboxylic acid; (ii) an active hydrogen compound having the formula X.sub.m --R--Y.sub.n, wherein R represents a group containing from 2 to 12 carbon atoms, X and Y are independently selected from primary amino, secondary amino and hydroxy, and m and n are each at least 1 and the sum of (m+n) is at least 2; and (iii) a capping agent comprised of an unsaturated and/or hydroxy functional monocarboxylic acid having from 8 to 22 carbon atom. The thixotropic alkyd resins of the present invention are particularly useful in preparing thixotropic paint and coating compositions having superior leveling and sag resistance.
    Type: Grant
    Filed: December 14, 1995
    Date of Patent: January 7, 1997
    Assignee: The Sherwin-Williams Company
    Inventors: Madhukar Rao, Hyeong-Chan Youn, Anthony F. Toussaint, Marianne G. DeCapite
  • Patent number: 5589560
    Abstract: A curable composition which comprises:(a) an anhydride-functional polymer obtained by polymerizing under free radical addition polymerization conditions, a monomer mixture comprising:(i) 20 to 75 weight percent of an alkenyl succinic anhydride having the structure: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are each independently hydrogen or alkyl or substituted alkyl of 1 to about 30 carbons; and(ii) 25 to 80 weight percent of at least one (meth)acrylic monomer copolymerizable with the alkenyl succinic anhydride; and, optionally,(iii) 0 to 75 weight percent of at least one unsaturated monomer, other than a (meth)acrylic monomer, which is copolymerizable with the anhydride and the (meth)acrylic monomer; and(b) a compound having an average of at least two functional groups per molecule which are reactive with anhydride groups.
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: December 31, 1996
    Assignee: The Sherwin-Williams Company
    Inventors: Richard S. Valpey, III, Thomas W. Yokoyama, John D. Kraan, H. James Harwood
  • Patent number: 5580995
    Abstract: Anhydride-functional polymerizable monomers having the structure: ##STR1## and polymers and reactive compositions prepared from these monomers are disclosed. The reactive compositions are especially useful in primer and clearcoat/basecoat applications.
    Type: Grant
    Filed: November 8, 1994
    Date of Patent: December 3, 1996
    Assignee: The Sherwin-Williams Company
    Inventor: Rubing Cai
  • Patent number: 5580610
    Abstract: A multi-layer composite coating composition which comprises:(a) a first coat which is substantially free of isocyanate functionality and which comprises:(i) a film-forming composition capable of curing or drying; and(ii) a metal catalyst for the reaction of isocyanate groups and active hydrogen groups;(b) a second coat which is applied to the surface of the first coat prior to the complete curing of said first coat, wherein the second coat comprises:(i) an active hydrogen functional compound; and(ii) a polyisocyanate;whereby upon the application of said second coat onto the metal catalyst containing first coat, the reaction between the polyisocyanate and the active hydrogen functional compound of-the second coat is catalyzed.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 3, 1996
    Assignee: The Sherwin-Williams Company
    Inventor: Wynn Moy
  • Patent number: 5580926
    Abstract: Curable compositions which comprise:(i) an acid-functional compound having an average of at least two carboxylic acid groups per molecule; and(ii) an anhydride-functional compound having an average of at least two cyclic carboxylic acid anhydride groups per molecule; and(iii) an epoxy-functional compound having an average of at least one epoxy group per molecule; and(iv) a hydroxy-functional compound having an average of at least two hydroxyl groups per molecule;wherein at least one of the compounds (i), (ii), (iii) or (iv) comprises a film forming polymer.
    Type: Grant
    Filed: August 26, 1991
    Date of Patent: December 3, 1996
    Assignee: The Sherwin-Williams Company
    Inventors: Mohamad D. Shalati, James A. Marquart, Sandra H. Angelo, Rodney M. Harris
  • Patent number: 5578345
    Abstract: A multi-layer composite coating composition which comprises:(a) a waterborne first coat which comprises:(i) a film-forming composition capable of curing or drying; and(ii) a catalyst for the reaction of isocyanate groups and active hydrogen groups; and(b) a second coat which is applied to the surface of the first coat prior to the complete curing of said first coat, wherein the second coat comprises:(i) an active hydrogen functional compound; and(ii) a polyisocyanate;whereby upon the application of said second coat onto the catalyst containing first coat, the reaction between the polyisocyanate and the active hydrogen functional compound of the second coat is catalyzed.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 26, 1996
    Assignee: The Sherwin-Williams Company
    Inventor: Wynn Moy
  • Patent number: 5578346
    Abstract: A multi-layer composite coating composition which comprises:(a) a first coat which is substantially free of isocyanate functionality and which comprises:(i) a film-forming composition capable of curing or drying;(ii) a catalyst for the reaction of isocyanate groups and active hydrogen groups; and(iii) optionally, a pigment;(b) a second coat which is preferably substantially free of any catalyst for the reaction of isocyanate groups and active hydrogen groups, and which is applied to the surface of the first coat prior to the complete curing of said first coat, wherein the second coat comprises:(i) an active hydrogen functional compound; and(ii) a polyisocyanate;whereby upon the application of said second coat onto the catalyst containing first coat, the reaction between the polyisocyanate and the active hydrogen functional compound of the second coat is catalyzed.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 26, 1996
    Assignee: The Sherwin-Williams Company
    Inventor: Wynn Moy
  • Patent number: 5573812
    Abstract: A multi-layer composite coating composition which comprises:(a) a first coat which is substantially free of isocyanate functionality and which comprises:(i) a film-forming composition capable of curing or drying; and(ii) a catalyst for the reaction of isocyanate groups and active hydrogen groups;(b) an intermediate coat which is not catalyzed by the catalyst in the first coat; and(c) a second coat which is applied to the surface of the intermediate coat prior to the complete curing of said first coat and said intermediate coat, wherein the second coat comprises:(i) an active hydrogen functional compound; and(ii) a polyisocyanate;whereby upon the application of said second coat, the reaction between the polyisocyanate and the active hydrogen functional compound of the second coat is catalyzed.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 12, 1996
    Assignee: The Sherwin-Williams Company
    Inventor: Wynn Moy
  • Patent number: 5559163
    Abstract: UV curable coatings comprising at least one photoinitiator and at least one photopolymerizable UV absorber, wherein the photoinitiator has the ability to absorb a significant portion of the total energy needed to cure the coating from wavelengths in which the UV absorber does not appreciably absorb.
    Type: Grant
    Filed: August 31, 1994
    Date of Patent: September 24, 1996
    Assignee: The Sherwin-Williams Company
    Inventors: William R. Dawson, Goutam Gupta
  • Patent number: 5554682
    Abstract: A hydroxy-functional polymeric dispersant which is substantially free of acid groups, amine groups, and ethylenic unsaturation, the dispersant being especially adapted for dispersing pigments therein and being compatible with a variety of film-forming polymers, said dispersant being the free radical addition polymerization reaction product of a mixture of monomers consisting essentially of:(a) 15-30% by weight styrene; and(b) 15-30% by weight of at least one alkyl methacrylate monomer having 1 to 16 carbon atoms in the alkyl group; and(c) 20-60% by weight of at least one alkyl acrylate monomer having 1 to 16 carbon atoms in the alkyl group; and(d) 7-25% by weight of at least one hydroxy-functional ethylenically unsaturated monomer copolymerizable with monomers (a) (b) and (c);wherein said polymeric dispersant has a weight average molecular weight of 18,000 to 24,000, a number average molecular weight of 4,500 to 7,400, and a polydispersity of 2.9 to 4.2.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: September 10, 1996
    Assignee: The Sherwin-Williams Company
    Inventors: Rodney M. Harris, Maqsood S. Ahmed, Thomas A. Renner