Patents by Inventor Masuo Sawa

Masuo Sawa 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).

  • Furan resin composition for production of molds
    Patent number: 8124719
    Abstract: A furan resin composition for production of molds has a urea content of 1 to 10 wt-% and a pH value (25° C.) of 7 to 10.
    Type: Grant
    Filed: August 4, 2005
    Date of Patent: February 28, 2012
    Assignee: KAO Corporation
    Inventor: Masuo Sawa
  • Furan Resin Composition For Production Of Molds
    Publication number: 20080045692
    Abstract: A furan resin composition for production of molds has a urea content of 1 to 10 wt-% and a pH value (25° C.) of 7 to 10.
    Type: Application
    Filed: August 4, 2005
    Publication date: February 21, 2008
    Applicant: Kao Corporation
    Inventor: Masuo Sawa
  • Acid-curable, refractory particulate material composition for forming mold
    Patent number: 6326418
    Abstract: The present invention provides a refractory granular material composition for a self-hardening molding by acid-hardening, consisting essentially of: a refractory granular material, an acid-hardening resin-containing binder composition, an acid-containing hardener composition, and at least one solvent selected from the group consisting of (1) alcohols, (2) ether alcohols and ester shown below: wherein R1 represents a C4 to C8 straight-chain or branched aliphatic hydrocarbon group or a benzyl group; R2 represents a C1 to C10 straight-chain or branched aliphatic hydrocarbon group, phenyl group or a benzyl group; R3 represents an ethylene group or a propylene group; n is an integer of 1 to 12; R4 represents, phenyl group or a methyl group; and R5 is a C2 to C6 aliphatic hydrocarbon group or (R3 —O)n R2.
    Type: Grant
    Filed: June 23, 1999
    Date of Patent: December 4, 2001
    Assignee: Kao Corporation
    Inventors: Shigeo Nakai, Masayuki Kato, Masuo Sawa
  • Binder composition for production of molds and method of producing mold
    Patent number: 5932628
    Abstract: The binder composition for the production of molds of the present invention comprises a binder obtained by polycondensation of polycondensable components comprising as major components furfuryl alcohol, urea, and an aldehyde. In the binder contained in the binder composition for the production of molds, the difference ?A-B! between the weight % of charged furfuryl alcohol (A) based on the weight of the binder and the weight % of unreacted furfuryl alcohol (B) based on the weight of the binder is 5.0 to 60.0. When the binder composition for the production of molds of the present invention is used, the curing of the binder is further accelerated without deteriorating the working atmosphere.
    Type: Grant
    Filed: February 19, 1997
    Date of Patent: August 3, 1999
    Assignee: Kao Corporation
    Inventors: Kazuhiko Kiuchi, Masayuki Kato, Masuo Sawa, Shigeo Nakai
  • Binder composition for mold making, binder/curing agent composition for mold making, sand composition for mold making, and process of making mold
    Patent number: 5616631
    Abstract: Sand compositions containing a binder composition and a curing agent, in which the binder composition comprises (a) a binder comprising an acid-curable resin and (b) from 0.5 to 63.0% by weight, based on the binder composition, of at least one curing accelerator selected from compounds represented by formula (1): ##STR1## wherein X.sub.1, X.sub.2 each represent a hydrogen atom, a methyl group or an ethyl group;exhibit an increased curing rate to provide a casting mold having an increased initial strength.
    Type: Grant
    Filed: October 31, 1995
    Date of Patent: April 1, 1997
    Assignee: Kao Corporation
    Inventors: Kazuhiko Kiuchi, Shigeo Nakai, Masuo Sawa, Masayuki Kato, Mitsuru Sakai, Shinya Nomura
  • Binder composition for mold making, binder/curing agent composition for mold making, sand composition for mold making, and process of making mold
    Patent number: 5491180
    Abstract: Sand compositions containing a binder composition and a curing agent, in which the binder composition comprises (a) a binder comprising an acid-curable resin and (b) from 0.5 to 63.0% by weight, based on the binder composition, of at least one curing accelerator selected from compounds represented by formula (1): ##STR1## wherein X.sub.1, X.sub.2 each represent a hydrogen atom, a methyl group or an ethyl group;exhibit an increased curing rate to provide a casting mold having an increased initial strength.
    Type: Grant
    Filed: August 17, 1994
    Date of Patent: February 13, 1996
    Assignee: Kao Corporation
    Inventors: Kazuhiko Kiuchi, Shigeo Nakai, Masuo Sawa, Masayuki Kato, Mitsuru Sakai, Shinya Nomura