Patents by Inventor Yasukazu Nakatani

Yasukazu Nakatani 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: 6764763
    Abstract: An aqueous fluoroelastomer curable composition comprising an aqueous fluoroelastomer dispersion and a basic polyol curing agent, and an article having a coating film formed from this composition. The aqueous fluoroelastomer curable composition has a long pot life although it is a one-fluid type aqueous dispersion, and forms a cured film having sufficient strength and heat resistance at a relatively low temperature in a short time.
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: July 20, 2004
    Assignee: Daikin Industries Ltd.
    Inventors: Nobuyuki Tomihashi, Koichiro Ogita, Kiyotaro Terasaka, Yasukazu Nakatani
  • Publication number: 20040132914
    Abstract: A stabilized fluorine-containing polymer powder having an average particle size of 5 to 100 &mgr;m is prepared by contacting a fluorine-containing polymer powder, which is prepared by milling the fluorine-containing polymer and removing fine particles, fibrous particles and coarse particles by classification, with a fluorinating agent so that the total number of unstable terminal groups is decreased to 7 to 50 per 106 carbon atoms. This a fluorine-containing polymer powder achieved a high coating efficiency in an electrostatic coating method and provides a film having good properties such as heat resistance, non-tackiness, low frictional property, chemical resistance, etc.
    Type: Application
    Filed: October 24, 2003
    Publication date: July 8, 2004
    Inventors: Yasukazu Nakatani, Toshio Miyatani, Koichiro Ogita
  • Patent number: 6720381
    Abstract: In an aqueous curing composition of a fluoroelastomer comprising a fluoroelastomer, a curing agent and a surfactant, a surfactant with which an amount of decomposition residues is 0.3% by weight or less after being baked at 300° C. for 30 minutes, for example, a polyoxyethylene alkyl ether or a polyoxyethylenepolyoxypropylene block polymer, is used as a surfactant. Such a composition can make use of the inherent characteristics of the fluoroelastomer.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: April 13, 2004
    Assignee: Daikin Industries, Ltd.
    Inventors: Nobuyuki Tomihashi, Koichiro Ogita, Kiyotaro Terasaka, Yasukazu Nakatani
  • Patent number: 6664336
    Abstract: An aqueous curing composition of a fluoroelastomer containing a fluoroelastomer, a fluororesin, a curing agent, which further contains a surfactant which leaves 0.3 wt. % or less of a decomposition residue after being heated at 300° C. for 30 minutes and/or a polar solvent having a boiling point of 300° C. or less and a surface tension of at least 30 dyne/cm at room temperature. When a coating film is formed from this aqueous composition, a large amount of the fluororesin contained therein can be bled up on the surface of the coating film. Thus, the durability and non-tackiness of the coating film can be improved.
    Type: Grant
    Filed: September 10, 2001
    Date of Patent: December 16, 2003
    Assignee: Daikin Industries, Ltd.
    Inventors: Nobuyuki Tomihashi, Koichiro Ogita, Kiyotaro Terasaka, Yasukazu Nakatani