Patents by Inventor Thi Bach-Phuong Dau

Thi Bach-Phuong Dau 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).

  • Publication number: 20130034741
    Abstract: A branched polyester prepared as the reaction product of a polyacid comprising at least 90 mole % isophthalic acid, including its ester and/or anhydride, and a polyol comprising a tri- or higher-functional polyol is disclosed. Coatings comprising the same are also disclosed, as are substrates coated at least in part with such coatings.
    Type: Application
    Filed: August 4, 2011
    Publication date: February 7, 2013
    Applicant: PPG Industries Ohio, Inc.
    Inventors: George W. Mauer, III, Debra Singer, Susan F. Donaldson, John E. Schwendeman, John M. Furar, Edward R. Millero, JR., Lawrence J. Fitzgerald, Shanti Swarup, Mark A. Tucker, Thi Bach-Phuong Dau, Anthony M. Chasser
  • Patent number: 8242211
    Abstract: The present invention is directed to a method for producing a dispersion comprising: (a) forming a first reaction product by reacting: (a1) at least one monomer comprising an ethylenically unsaturated double bond; (a2) at least one carboxylic acid group-containing monomer; and (a3) at least one glycidyl ester compound; wherein the molar ratio of (a2) to (a3) is substantially 1:1; (b) forming a second reaction product in the presence of the first reaction product by reacting: (b1) at least one monomer comprising an ethylenically unsaturated double bond; and (b2) at least one carboxylic acid group-containing monomer; and (c) reacting an amine compound with the second reaction product; and wherein steps (a), (b), and (c) are conducted in a substantially solvent free environment.
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: August 14, 2012
    Assignee: PPG Industries Ohio, Inc
    Inventors: Shanti Swarup, Thi Bach-Phuong Dau, Helena Recio
  • Publication number: 20100190911
    Abstract: The present invention is directed to a method for producing a dispersion comprising: (a) forming a first reaction product by reacting: (a1) at least one monomer comprising an ethylenically unsaturated double bond; (a2) at least one carboxylic acid group-containing monomer; and (a3) at least one glycidyl ester compound; wherein the molar ratio of (a2) to (a3) is substantially 1:1; (b) forming a second reaction product in the presence of the first reaction product by reacting: (b1) at least one monomer comprising an ethylenically unsaturated double bond; and (b2) at least one carboxylic acid group-containing monomer; and (c) reacting an amine compound with the second reaction product; and wherein steps (a), (b), and (c) are conducted in a substantially solvent free environment.
    Type: Application
    Filed: January 26, 2010
    Publication date: July 29, 2010
    Inventors: SHANTI SWARUP, HELENA RECIO, THI BACH-PHUONG DAU
  • Publication number: 20100190923
    Abstract: The present invention is directed to a method for producing a dispersion comprising: (a) reacting (i) a monomer comprising an ethylenically unsaturated double bond; (ii) a carboxylic acid group-containing monomer; and (iii) a glycidyl ester compound to form a reaction product comprising a carboxylic acid group; and (b) reacting the reaction product of (a) with an amine compound; and wherein there is a molar excess of (ii) to (iii); wherein steps (a) and (b) are conducted in a substantially solvent free environment and wherein the reaction product of (b) is not further reacted with a polyester polyol.
    Type: Application
    Filed: January 26, 2010
    Publication date: July 29, 2010
    Inventors: Shanti Swarup, Helena Recio, Thi Bach-Phuong Dau
  • Patent number: 6884845
    Abstract: A waterborne film-forming composition is provided that includes a stable aqueous dispersion of a mixture of a polyester polyol and a carboxylic acid-containing acrylic polymer polyol having a weight ratio of polyester polyol to acrylic polymer polyol in the range of 10:90 to 30:70; and a polyisocyanate crosslinking agent where the equivalent ratio of hydroxyl groups to isocyanate groups is from 0.8:1 to 1.7:1. The polyol component is prepared by polymerizing a mixture of ethylenically unsaturated polymerizable monomers that includes at least one carboxylic acid group-containing monomer; at least one primary alcohol group-containing monomer; and at least one glycidyl ester of an aliphatic saturated monocarboxylic acid in the presence of at least one polyester polyol. Multi-layer composite coatings and coated substrates are also provided.
    Type: Grant
    Filed: May 20, 2002
    Date of Patent: April 26, 2005
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Shanti Swarup, Thi Bach-Phuong Dau
  • Patent number: 6881786
    Abstract: A film-forming composition that includes a stable aqueous dispersion of a mixture of a polyester polyol and a carboxylic acid-containing acrylic polymer polyol and a crosslinking agent having functional groups reactive with hydroxyl groups. The weight ratio of polyester polyol to acrylic polymer polyol is in the range of 10:90 to 30:70. The crosslinking agent is one or more blocked isocyanates or aminoplasts. The equivalent ratio of hydroxyl groups to reactive functional groups on the crosslinking agent is from 0.8:1 to 1.7:1. The film forming composition can be used in multi-layer composite coating compositions that include a base coat layer and a substantially pigment-free topcoat deposited over at least a portion of the base coat layer, the topcoat composition including the present film-forming composition.
    Type: Grant
    Filed: May 20, 2002
    Date of Patent: April 19, 2005
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Shanti Swarup, Thi Bach-Phuong Dau
  • Publication number: 20030216515
    Abstract: A film-forming composition that includes a stable aqueous dispersion of a mixture of a polyester polyol and a carboxylic acid-containing acrylic polymer polyol and a crosslinking agent having functional groups reactive with hydroxyl groups. The weight ratio of polyester polyol to acrylic polymer polyol is in the range of 10:90 to 30:70. The crosslinking agent is one or more blocked isocyanates or aminoplasts. The equivalent ratio of hydroxyl groups to reactive functional groups on the crosslinking agent is from 0.8:1 to 1.7:1. The film forming composition can be used in multi-layer composite coating compositions that include a base coat layer and a substantially pigment-free topcoat deposited over at least a portion of the base coat layer, the topcoat composition including the present film-forming composition.
    Type: Application
    Filed: May 20, 2002
    Publication date: November 20, 2003
    Inventors: Shanti Swarup, Thi Bach-Phuong Dau
  • Publication number: 20030216516
    Abstract: A waterborne film-forming composition is provided that includes a stable aqueous dispersion of a mixture of a polyester polyol and a carboxylic acid-containing acrylic polymer polyol having a weight ratio of polyester polyol to acrylic polymer polyol in the range of 10:90 to 30:70; and a polyisocyanate crosslinking agent where the equivalent ratio of hydroxyl groups to isocyanate groups is from 0.8:1 to 1.7:1. The polyol component is prepared by polymerizing a mixture of ethylenically unsaturated polymerizable monomers that includes at least one carboxylic acid group-containing monomer; at least one primary alcohol group-containing monomer; and at least one glycidyl ester of an aliphatic saturated monocarboxylic acid in the presence of at least one polyester polyol. Multi-layer composite coatings and coated substrates are also provided.
    Type: Application
    Filed: May 20, 2002
    Publication date: November 20, 2003
    Inventors: Shanti Swarup, Thi Bach-Phuong Dau