Patents by Inventor Ayumu Yokoyama

Ayumu 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).

  • Publication number: 20120053291
    Abstract: The present disclosure is directed to a coating composition having polyester and low molecular weight polytrimethylene ether glycol. This invention is further directed to a coating composition comprising components derived from renewable resources.
    Type: Application
    Filed: March 14, 2011
    Publication date: March 1, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: RAJESH GOPALAN SALIYA, Ayumu Yokoyama, Hari Babu Sunkara
  • Publication number: 20110269884
    Abstract: The present disclosure is directed to a process for producing a low VOC (volatile organic content) coating composition. The present disclosure is particularly directed to a process for producing a low VOC (volatile organic content) coating composition by mixing a water based crosslinking component and an organic solvent based crosslinkable component. The present disclosure is further directed to a low VOC coating composition produced by the process.
    Type: Application
    Filed: April 28, 2011
    Publication date: November 3, 2011
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: AYUMU YOKOYAMA, Jennifer Majlak, Ross Sydney Morgan
  • Publication number: 20110257330
    Abstract: The present invention is directed to an aqueous coating composition comprising a polymer having one or more crosslinkable functional groups; a polytrimethylene ether diol from renewable resource having a Mn (number average molecular weight) in a range of from 500 to 10,000; and a crosslinking agent. The aqueous coating composition comprises in a range of from 10% to 80% of water.
    Type: Application
    Filed: December 28, 2009
    Publication date: October 20, 2011
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Ayumu Yokoyama, Sheau-Hwa Ma, Rajesh Gopalan Saliya
  • Publication number: 20110171106
    Abstract: The present invention is directed to a process and a system for decomposing one or more volatile organic compounds (VOC) from a composition. This invention is particularly directed to a process and a system for decomposing one or more volatile organic compounds (VOC) from a coating composition. This invention is directed for reducing overall VOC emission from a composition, particularly from a coating composition.
    Type: Application
    Filed: September 29, 2010
    Publication date: July 14, 2011
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: AYUMU YOKOYAMA, Irving D. Bell
  • Publication number: 20110165423
    Abstract: The present disclosure is directed to a coating composition having excellent adhesion and balanced coating properties. This disclosure is further directed to a coating composition comprising components derived from renewable resources.
    Type: Application
    Filed: October 12, 2009
    Publication date: July 7, 2011
    Applicant: E.I. DuPont de Nemours and Company
    Inventors: Sheau-Hwa Ma, Ayumu Yokoyama, Rajesh Gopalan Saliya, Patricia Mary Ellen Sormani
  • Patent number: 7910644
    Abstract: The present disclosure is directed to a coating composition that is capable of producing coatings being sag-free at high coating thicknesses, having excellent adhesion to substrates, and good appearance. This disclosure is further directed to a coating composition comprising components derived from renewable resources.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: March 22, 2011
    Assignee: E.I. du Pont de Nemours & Company
    Inventors: Rajesh Gopalan Saliya, Ayumu Yokoyama, Patricia Mary Ellen Sormani, Sheau-Hwa Ma, Eric C. Houze, Delson Jayme Trindade
  • Publication number: 20110052920
    Abstract: The present disclosure is directed to a coating composition having excellent adhesion and flexibility. This invention is further directed to a coating composition comprising components derived from renewable resources.
    Type: Application
    Filed: June 18, 2009
    Publication date: March 3, 2011
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Ayumu Yokoyama, Sheau-Hwa Ma, Patricia Mary Ellen Sormani
  • Publication number: 20110052919
    Abstract: The present disclosure is directed to a coating composition having excellent adhesion to primer layers, fast drying, improved flexibility and good pot life. This disclosure is further directed to a coating composition comprising components derived from renewable resources, low Tg acrylic polymers having one or more crosslinkable functional groups and a crosslinking agent having one or more crosslinking functional groups.
    Type: Application
    Filed: April 17, 2009
    Publication date: March 3, 2011
    Inventors: Ayumu Yokoyama, Patricia Mary Ellen Sormani, Sheau-Hwa Ma, James Lamonte Adams
  • Publication number: 20110003931
    Abstract: An encapsulated titanium dioxide comprising an intimate mixture of A) crude titanium dioxide in finely divided particulate form, and B) from 0.1 wt % to 10 wt %, based on the wt % of titanium dioxide of at least one (meth)acrylic polymer and method of preparation.
    Type: Application
    Filed: December 18, 2009
    Publication date: January 6, 2011
    Inventors: Lech Wilczek, Patrick F. McIntyre, Karyn B. Visscher, Ayumu Yokoyama, Owen H. Decker
  • Publication number: 20100331456
    Abstract: A powder coating composition comprising an intimate mixture of at least one film forming resin binder and from 0.1 to 50 wt. %, based on the total weight of the powder coating composition, of at least one modified encapsulated titanium dioxide.
    Type: Application
    Filed: December 18, 2009
    Publication date: December 30, 2010
    Inventors: Lech Wilczek, Patrick F. McIntyre, Karyn B. Visscher, Ayumu Yokoyama, Owen H. Decker
  • Publication number: 20100279123
    Abstract: The present invention is directed to a matting agent for reducing gloss of a coating. The matting agent comprises: a) a silica component; b) a polytrimethylene ether diol; c) one or more solvents; and d) optionally, one or more polymers. This invention is further directed to a matting agent comprising components derived from renewable resources.
    Type: Application
    Filed: April 29, 2010
    Publication date: November 4, 2010
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: AYUMU YOKOYAMA, Rajesh Gopalan Saliya, Sheau-Hwa Ma
  • Publication number: 20100004365
    Abstract: The present disclosure is directed to a coating composition that is capable of producing coatings being sag-free at high coating thicknesses, having excellent adhesion to substrates, and good appearance. This disclosure is further directed to a coating composition comprising components derived from renewable resources.
    Type: Application
    Filed: June 23, 2009
    Publication date: January 7, 2010
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Rajesh Gopalan Saliya, Ayumu Yokoyama, Patricia Mary Ellen Sormani, Sheau-Hwa Ma, Eric C. Houze, Delson Jayme Trindade
  • Publication number: 20070248762
    Abstract: Synthetic resins, such as thermoplastics and thermosetting resins, which have certain specified surface resistivities and static dissipation voltage values, are advantageously used as substrates to be coated in electrostatically assisted coating processes. Thus less of an electrically conducting additive, which is often deleterious to the substrate physical properties, may be used and/or additives which do not increase the electrical conductivity of the substrate to much may be used.
    Type: Application
    Filed: April 10, 2007
    Publication date: October 25, 2007
    Inventors: Toshikazu Kobayashi, Ayumu Yokoyama, Shawn Zhang
  • Publication number: 20070026154
    Abstract: This invention relates to a method for maximizing the stone chipping resistance and scratch resistance of a multi-layer finish on an automotive substrate. A colored basecoat is applied to the substrate and directly on top of the basecoat is applied a protective clearcoat having a fracture resistance about equal to or above 26 mN and a plastic deformation resistance about equal to or above 30 mN/?m. The resultant coating in addition to being durable to the elements and having excellent appearance produces a finish with an outstanding balance of scratch and stone chip resistance after application.
    Type: Application
    Filed: July 26, 2006
    Publication date: February 1, 2007
    Inventors: Ayumu Yokoyama, Basil Gregorovich, Robert Matheson, Li Lin
  • Patent number: 6204319
    Abstract: An aqueous coating composition containing: (a) an aqueous carrier medium: (b) a pigment having a pH below 7.0; (c) an AB block copolymer pigment dispersant resin of (1) an A block of a hydrophobic polymer having amine groups; and (2) a B block of a hydrophilic polymer having hydroxyl groups and carboxyl groups; the AB block copolymer has a number average molecular weight of 5,000-20,000 and contains 20-80% by weight of a polymeric A segment and correspondingly 80-20% by weight of a polymeric B segment; wherein the pigment and the dispersant are present in a pigment to dispersant weight ratio of 0.1/1-20/1; (d) a film forming polymeric binder containing carboxyl groups and (e) a crosslinking agent which on curing of the coating composition will react with the carboxyl and hydroxyl groups of the AB block copolymer and the carboxyl groups of the film forming polymeric binder. Pigment dispersions of the AB block copolymer and process for forming the dispersions also are part of this invention.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: March 20, 2001
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Eric Charles Houze, Patrick F. McIntyre, Harry J. Spinelli, Ayumu Yokoyama