Patents by Inventor Michitaka Sawada

Michitaka Sawada 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: 7396863
    Abstract: An ink set comprising a black ink and a color ink, wherein the black ink comprises an aqueous dispersion of water-insoluble vinyl polymer particles containing an oil-soluble black dye or carbon black, the vinyl polymer particles have an ionicity opposite to that of the color ink, and the vinyl polymer comprises a water-insoluble vinyl polymer prepared by copolymerizing (a) a salt forming group-containing monomer, (b) a monomer represented by the formula (I): CH2?C(R1)COO(R2O)pR3 ??(I) wherein R1 is hydrogen atom or a lower alkyl group, R2 is a divalent hydrocarbon group which may have a hetero-atom, R3 is a monovalent hydrocarbon group which may have a hetero-atom, and p is a number of 1 to 60, (c) a macromer, and (d) a monomer copolymerizable with these monomers. The ink set can be used as an ink set for inkjet recording, which is excellent in not only fixing abilities and water resistance, but also bleeding resistance and jettability, and can form very clear printouts.
    Type: Grant
    Filed: December 26, 2000
    Date of Patent: July 8, 2008
    Assignee: Kao Corporation
    Inventors: Yukihiro Nakano, Shigeki Nagashima, Hiroki Kubo, Michitaka Sawada
  • Patent number: 6852777
    Abstract: A water-based ink for inkjet printing comprising a water dispersion of vinyl polymer particles prepared by containing a pigment in a vinyl polymer prepared by copolymerizing a monomer mixture comprising (a) a salt-forming group-containing monomer, (b) a macromer, and (c) a monomer copolymerizable with the salt-forming group-containing monomer and the macromer; and a process for preparing a water-based ink for inkjet printing comprising a water dispersion of vinyl polymer particles prepared by containing a pigment in a vinyl polymer, comprising dissolving in an organic solvent a vinyl polymer prepared by copolymerizing a monomer mixture comprising (a) a salt-forming group-containing monomer, (b) a macromer, and (c) a monomer copolymerizable with the salt-forming group-containing monomer and the macromer; adding a pigment to the resulting solution; pre-kneading the mixture; thereafter adding a neutralizing agent and water and kneading the mixture, to give an oil-in-water dispersion; and distilling off the organ
    Type: Grant
    Filed: December 28, 1999
    Date of Patent: February 8, 2005
    Assignee: Kao Corporation
    Inventors: Yukihiro Nakano, Isao Tsuru, Kohji Azuma, Michitaka Sawada, Takehiro Tsutsumi
  • Patent number: 6758559
    Abstract: A water-based ink for inkjet printing, including (A) an aqueous dispersion A of vinyl polymer particles prepared by including an oil-soluble black dye or carbon black in a water-insoluble vinyl polymer prepared by copolymerizing a salt-forming group-containing monomer (a), a monomer (b) represented by the formula (I): CH2═C(R1)COO(R2O)pR3  (I) wherein R1 is hydrogen atom or a lower alkyl group; R2 is a divalent hydrocarbon group which may have a hetero-atom; R3 is a monovalent hydrocarbon group which may have a hetero-atom; p is a number of 1 to 60, a macromer (c), a monomer (d) copolymerizable with these monomers; and (B) an aqueous dispersion B of carbon black having the same ionicity as the aqueous dispersion A, wherein the weight ratio of the solid content of the aqueous dispersion A to the solid content of the aqueous dispersion B (the solid content of the aqueous dispersion A/the solid content of the aqueous dispersion B) is 5/95 to 95/5.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: July 6, 2004
    Assignee: Kao Corporation
    Inventors: Yukihiro Nakano, Michitaka Sawada
  • Publication number: 20030087988
    Abstract: An ink set comprising a black ink and a color ink, wherein the black ink comprises an aqueous dispersion of water-insoluble vinyl polymer particles containing an oil-soluble black dye or carbon black, the vinyl polymer particles have an ionicity opposite to that of the color ink, and the vinyl polymer comprises a water-insoluble vinyl polymer prepared by copolymerizing (a) a salt forming group-containing monomer, (b) a monomer represented by the formula (I):
    Type: Application
    Filed: June 28, 2002
    Publication date: May 8, 2003
    Inventors: Yukihiro Nakano, Shigeki Nagashima, Hiroki Kubo, Michitaka Sawada
  • Patent number: 6123934
    Abstract: The present invention provides a hair cosmetic composition containing an antibody (a) to hair or a hair extract obtained from egg yolk of poultry immunized with the hair or hair extract, and a polymer emulsion (b). The hair cosmetic composition of the invention can provide excellent properties including softness, moistened feel, and smoothness. In addition, since it is adsorbed only onto a specified part of the hair, stickiness or greasiness of the hair can be prevented. The composition also prevents occurrence of split hairs, and even repair the split hairs. These effects are not lost by repeated ordinary shampooings.
    Type: Grant
    Filed: June 20, 1997
    Date of Patent: September 26, 2000
    Assignees: Kao Corporation, Taiyo Kagaku Co., Ltd.
    Inventors: Takashi Koyama, Kazuyo Watanabe, Hiroshi Nojiri, Sachio Naito, Michitaka Sawada, Genji Imokawa, Hidehisa Takahashi, Toshiki Kobayashi
  • Patent number: 6031019
    Abstract: Aqueous ink for ink-jet printing comprises an emulsion of fine polymer particles and contains at least one compound selected from an amino acid or a salt thereof and the like.
    Type: Grant
    Filed: February 4, 1998
    Date of Patent: February 29, 2000
    Assignee: Kao Corporation
    Inventors: Takehiro Tsutsumi, Koji Azuma, Michitaka Sawada, Tadashi Sakuma, Kenji Kaida, Shigemi Wakabayashi, Tetsuya Ueno, Kuniyasu Kawabe
  • Patent number: 5998501
    Abstract: A process for producing an aqueous ink for inkjet printing capable of giving an elevated print density of printed matters, being improved in fixability to the material to be printed, water resistance and improved storage stability and scarcely scorching onto a printer head. This process comprises dissolving a salt-forming group-having polymer and a hydrophobic dye in a water-insoluble organic solvent to obtain a solution, adding water and a neutralizing agent optionally together with a surfactant to the solution to ionize the salt-forming group of the polymer, emulsifying the resulting mixture, and removing out the solvent from the emulsion to obtain an ink containing an aqueous dispersion of the polymer particles in which the dye has been encompassed.
    Type: Grant
    Filed: February 2, 1998
    Date of Patent: December 7, 1999
    Assignee: Kao Corporation
    Inventors: Tekehiro Tsutsumi, Koji Azuma, Michitaka Sawada
  • Patent number: 5852074
    Abstract: An aqueous inkjet printing ink with excellent water resistance, wherein scorching onto a printer head scarcely occurs, the amount of a hydrophobic dye contained in an aqueous dispersion of a vinyl polymer can be increased, and sharp printed letters having deep color can be provided. The aqueous ink product for inkjet printing comprises a dispersion of a vinyl polymer obtained by copolymerizing one or more selected from a silicone macromer, an acrylamide monomer and a methacrylamide monomer (not having a salt-forming group), or a styrene macromer of a styrene homopolymer or a styrene copolymer having a polymerizable functional group at one terminal end, a polymerizable unsaturated monomer having the salt-forming group, and a monomer capable of polymerizing with these monomers in the presence of a radical polymerization initiator, a hydrophobic dye being contained in the dispersion.
    Type: Grant
    Filed: February 24, 1997
    Date of Patent: December 22, 1998
    Assignee: Kao Corporation
    Inventors: Takehiro Tsutsumi, Michitaka Sawada
  • Patent number: 5780047
    Abstract: A patch is disclosed, which comprises a water-soluble adhesive sheet (a), and a patch is disclosed, which comprises a water-soluble adhesive sheet (a) and a water-soluble protective material (b) laminated thereon.This patch is convenient in handling and achieves high merit. Also, it can be applied to the skin so as to exhibit excellent warm-bathing effects on the application site.
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: July 14, 1998
    Assignee: Kao Corporation
    Inventors: Tetsuro Kamiya, Kouichi Niinaka, Keiko Morioka, Hidenori Yorozu, Michitaka Sawada, Masaki Iwasaki
  • Patent number: 5770187
    Abstract: An amphoteric porous particulate containing a basic polysaccharide and a polymer of an organic acid containing a reactive vinyl group or a salt thereof and having an average particle size of 50 .mu.m or less, is capable of adsorbing a large amount of an acid or a base that is stronger than the acid or basic groups thereof and is useful in a deodorant or a cosmetic. The amphoteric porous particulate is made by emulsifying or suspending an aqueous solution containing a basic polysaccharide and an organic acid having a reactive vinyl group in a hydrophobic solvent, followed by polymerization. A deodorant may be made of a chitosan particulate having an average particle size of 0.01 to 50 .mu.m. A polysiloxane having long-chain alkyl groups and a melting point of 20.degree. C. or above is useful as an oil component of a deodorant.
    Type: Grant
    Filed: September 13, 1996
    Date of Patent: June 23, 1998
    Assignee: Kao Corporation
    Inventors: Yoshihiro Hasebe, Michitaka Sawada, Makoto Furukawa, Takako Nakayama, Kenji Kodama, Yasushi Ito, Genichi Nakamura, Yasuhisa Fukumoto
  • Patent number: 5688493
    Abstract: A cosmetic composition comprising an aqueous polymer emulsion in an amount of from 1 to 60% by weight in terms of the weight of solid contents of the cosmetic composition. The aqueous polymer emulsion is produced by polymerizing at least one polymerizable monomer having a double bond in the presence of a plasticizer or a film-forming auxiliary. This aqueous polymer emulsion ensures in the cosmetic composition excellent gloss, film stability, water repellency, and film-forming properties, and also ensures freedom from cosmetic crumbling due to sweat and sebum.
    Type: Grant
    Filed: October 17, 1994
    Date of Patent: November 18, 1997
    Assignee: Kao Corporation
    Inventors: Tooru Sugawara, Hitoshi Hosokawa, Koichi Nakamura, Michitaka Sawada, Takehiro Tsutsumi