Patents by Inventor Thomas W. Yokoyama

Thomas W. Yokoyama 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: 6992133
    Abstract: Coating compositions based on nonlinear, low molecular weight, polyester-based polyols having low viscosity and high solids content made by reacting a branched, polyhydric alcohol having at least three hydroxyl groups, such as trimethylolpropane; a glycol or diol; and a compound selected from the group consisting of a aliphatic or aromatic dicarboxylic acid, C1–C6 alkyl ester, anhydride, diacid halide, or mixtures thereof. The nonlinear, polyester-based polyols are quite effective in maintaining a high solids content while lowering viscosity when blended with other coating resins, such as acrylic resins, making the coating resins more effective in cured coatings by improving flexibility, impact resistance and hardness without adversely affecting appearance, solvent resistance, and/or accelerated weathering. This invention also relates to the process of coating a substrate with these coating compositions.
    Type: Grant
    Filed: February 27, 2003
    Date of Patent: January 31, 2006
    Assignee: CPH Innovations Corp.
    Inventors: Thomas W. Yokoyama, Robert James McMillin, Gary Wentworth
  • Publication number: 20040171755
    Abstract: Coating compositions based on nonlinear, low molecular weight, polyester-based polyols having low viscosity and high solids content made by reacting a branched, polyhydric alcohol having at least three hydroxyl groups, such as trimethylolpropane; a glycol or diol; and a compound selected from the group consisting of a aliphatic or aromatic dicarboxylic acid, C1-C6 alkyl ester, anhydride, diacid halide, or mixtures thereof. The nonlinear, polyester-based polyols are quite effective in maintaining a high solids content while lowering viscosity when blended with other coating resins, such as acrylic resins, making the coating resins more effective in cured coatings by improving flexibility, impact resistance and hardness without adversely affecting appearance, solvent resistance, and/or accelerated weathering. This invention also relates to the process of coating a substrate with these coating compositions.
    Type: Application
    Filed: February 27, 2003
    Publication date: September 2, 2004
    Inventors: Thomas W. Yokoyama, Robert James McMillin, Gary Wentworth
  • Patent number: 6344502
    Abstract: A non-aqueous dispersion of a polymer in a non-polar hydrocarbon. The polymer is produced by a free-radical addition polymerization reaction of a group of monomers including at least one polar monomer and at least one amine-functional monomer which takes place in the presence of an alkyd resin.
    Type: Grant
    Filed: July 16, 1999
    Date of Patent: February 5, 2002
    Assignee: The Sherwin-Williams Company
    Inventors: John R. Babjak, Liza A. Capino, John D. Kraan, Mohamad D. Shalati, Susan L. Smith, Demetri L. Vallion, Richard S. Valpey, III, Thomas W. Yokoyama
  • Publication number: 20010036999
    Abstract: Coating compositions based on nonlinear, low molecular weight, polyester-based polyols having low viscosity and high solids content made by reacting a branched, polyhydric alcohol having at least three hydroxyl groups, such as trimethylolpropane; a glycol or diol; and a compound selected from the group consisting of a aliphatic or aromatic dicarboxylic acid, C1-C6 alkyl ester, anhydride, diacid halide, or mixtures thereof. The nonlinear, polyester-based polyols are quite effective in maintaining a high solids content while lowering viscosity when blended with other coating resins, such as acrylic resins, making the coating resins more effective in cured coatings by improving flexibility, impact resistance and hardness without adversely affecting appearance, solvent resistance, and/or accelerated weathering. This invention also relates to the process of coating a substrate with these coating compositions.
    Type: Application
    Filed: February 7, 2001
    Publication date: November 1, 2001
    Inventors: Thomas W. Yokoyama, Robert James McMillin, Gary Wentworth
  • Patent number: 5679742
    Abstract: An anhydride-functional polymer is obtained by at least partially hydrogenating an unsaturated polymer which was 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: August 26, 1996
    Date of Patent: October 21, 1997
    Assignee: The Sherwin-Williams Company
    Inventors: Richard S. Valpey, III, Mohamad D. Shalati, Rodney M. Harris, Thomas W. Yokoyama
  • 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: 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: 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: 5550197
    Abstract: An anhydride-functional polymer is obtained by at least partially hydrogenating an unsaturated polymer which was 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: October 20, 1995
    Date of Patent: August 27, 1996
    Assignee: The Sherwin-Williams Company
    Inventors: Richard S. Valpey, III, Mohamad D. Shalati, Rodney M. Harris, Thomas W. Yokoyama
  • Patent number: 5516820
    Abstract: Novel, non-aqueous dispersions and coatings made therefrom particularly suited for use as automotive primers, sealers, topcoats and as industrial coatings.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 14, 1996
    Inventors: John R. Babjak, Liza A. Capino, John D. Kraan, Mohamad D. Shalati, Susan L. Smith, Demetri L. Vallion, Richard S. Valpey, Thomas W. Yokoyama
  • Patent number: 5480951
    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: January 3, 1994
    Date of Patent: January 2, 1996
    Assignee: The Sherwin-Williams Company
    Inventors: Richard S. Valpey, III, Thomas W. Yokoyama, John D. Kraan, H. James Harwood
  • Patent number: 5405973
    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, topcoat, and in clearcoat/basecoat applications.
    Type: Grant
    Filed: January 3, 1994
    Date of Patent: April 11, 1995
    Assignee: The Sherwin-Williams Company
    Inventors: Rodney M. Harris, John R. Babjak, Thomas W. Yokoyama, Mohamed D. Shalati
  • Patent number: 5364945
    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: January 3, 1994
    Date of Patent: November 15, 1994
    Assignee: The Sherwin-Williams Company
    Inventors: Rubing Cai, Thomas W. Yokoyama
  • Patent number: 5157100
    Abstract: A method for extending the pot-life of a curable composition comprising a mixture of at least one active hydrogen-containing material, such as a polyol or polyamine, and a polyisocyanate, which method comprises incorporating within the mixture a pot-life extending amount of a polyanhydride having an average of at least two anhydride groups per molecule.
    Type: Grant
    Filed: September 20, 1991
    Date of Patent: October 20, 1992
    Assignee: The Sherwin-Williams Company
    Inventors: John R. Babjak, Thomas W. Yokoyama