Patents by Inventor Tsuyoshi Iwa

Tsuyoshi Iwa 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: 20100036050
    Abstract: Provided are a vinyl monomer-grafted alkoxysilane-modified oxyalkylene resin which is useful as a raw material for a modified silicone based elastic adhesive and excellent in storage stability and adhesiveness and furthermore, cures with moisture excellently within a short time period, a production method for the resin, and a curable composition containing the resin. Specifically disclosed is a vinyl monomer-grafted alkoxysilane-modified oxyalkylene resin, which is produced by a method including grafting of a vinyl monomer by using an oxyalkylene based polymer as a raw material, in which the vinyl monomer includes a vinyl monomer containing 50 wt % or more of one or more of kinds of (meth)acrylic monomers, and the vinyl monomer is subjected to a graft reaction by using an alkyl peroxide as a radical reaction initiator.
    Type: Application
    Filed: August 3, 2007
    Publication date: February 11, 2010
    Inventors: Tsuyoshi Iwa, Kouichi Murayama, Tatsuya Shibata, Takashi Kanno, Atsushi Saito, Yutaka Watanabe
  • Publication number: 20100029860
    Abstract: An alkoxysilane-containing resin is produced by reacting a terminal carboxyl group-containing oligomer with an isocyanato alkoxysilane compound.
    Type: Application
    Filed: January 15, 2008
    Publication date: February 4, 2010
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Shirou Honma, Tamotsu Kunihiro, Tsuyoshi Iwa
  • Publication number: 20100022717
    Abstract: A terminal isocyanate group-containing polyamide resin can be produced by reacting a terminal carboxyl group-containing oligomer and a polyisocyanate compound at such a ratio that the amount of an isocyanate group exceeds that of a carboxyl group. An alkoxysilane-modified polyamide resin can be produced by reacting the terminal isocyanate group-containing polyamide resin with an alkoxysilane compound containing a secondary amine.
    Type: Application
    Filed: September 7, 2007
    Publication date: January 28, 2010
    Inventors: Shirou Honma, Tamotsu Kunihiro, Tsuyoshi Iwa
  • Publication number: 20090111952
    Abstract: A (meth)acrylate-grafted polyether polyol produced by reacting 40 to 95 parts by weight of a polyoxyalkylene polyol and 5 to 60 parts by weight of a vinyl monomer, both relative to 100 parts by weight of the sum total of the polyoxyalkylene polyol and the vinyl monomer, and 0.1 to 5 moles of an alkyl peroxide as a radical initiator per mole of the hydroxyl group in the polyoxyalkylene polyol, wherein the polyoxyalkylene polyol has a hydroxyl number of 25 mg KOH/g or less, and the vinyl monomer contains a (meth)acrylate and/or a hydroxyl-containing (meth)acrylate in an amount of 50% by weight or higher. The (meth)acrylate-grafted polyether polyol is excellent in colorless-transparency, compatibility, mechanical strength, weather resistance, and blending resistance, and therefore is useful as a raw material for a polyurethane resin cured article.
    Type: Application
    Filed: August 31, 2006
    Publication date: April 30, 2009
    Inventors: Tamotsu Kunihiro, Shinsuke Matsumoto, Tsuyoshi Iwa, Kouichi Murayama
  • Publication number: 20080319095
    Abstract: A thermosetting polyamide foam prepared by reacting a polyisocyanate compound with a polyester polycarboxylic acid using a compound having a P?N bond as a catalyst under conditions of an NCO index of not less than 1.6. The polyamide foam is excellent in heat resistance (thermal decomposition resistance) and moldability, and is applicable for heat-resistant vibration dampers, heat-resistant sound-absorbing materials and heat-resistant cushioning materials.
    Type: Application
    Filed: January 6, 2005
    Publication date: December 25, 2008
    Applicant: Mitsui Chemicals Polyurethanes, Inc.
    Inventors: Tsuyoshi Iwa, Tatsuya Shibata, Kazuhiko Okubo
  • Publication number: 20070293631
    Abstract: A polyether polyol grafted with hydroxyl group-containing (meth)acrylate related to the present invention has an ester group represented by formula (1) below in the molecule. (In the formula, R1 represents a hydrogen atom or a methyl group, and R2 is an alkylene group having 1 to 18 carbon atoms.) This polyether polyol is suitably used as a raw material for polyurethane resin cured products excellent in mechanical strength and weather resistance.
    Type: Application
    Filed: October 20, 2005
    Publication date: December 20, 2007
    Applicant: MITSUI CHEMICALS POLYURETHANES, INC.
    Inventors: Tamotsu Kunihiro, Shinsuke Matsumoto, Tsuyoshi Iwa
  • Patent number: 6497983
    Abstract: The present invention is aimed at providing a toner binder for electrophotography that is excellent in the fixing property, offset resistance, blocking property, grindability, durable developing property and the like to correspond to the high-speed movement of a copier. The purpose of the present invention could be achieved by a toner binder having the following features for electrophotography. That is, when the viscoelasticity of the toner binder is measured in the temperature range of 50 to 200 ° C. and at a heating rate of 2° C./min., the viscoelasticity curve in the temperature range of 100 to 200° C. showing the relationship between the storage modulus and temperature, in which curve the axis of ordinate is the logarithm (Pa) of storage modulus G′ and the axis of abscissa is temperature (° C.), has a concave in the temperature range of 140 to 180° C.
    Type: Grant
    Filed: October 12, 2001
    Date of Patent: December 24, 2002
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Tsuyoshi Iwa, Kazuya Sakata, Shoji Kawasaki, Masaaki Shin
  • Publication number: 20020076637
    Abstract: The present invention is aimed at providing a toner binder for electrophotography that is excellent in the fixing property, offset resistance, blocking property, grindability, durable developing property and the like to correspond to the high-speed movement of a copier.
    Type: Application
    Filed: October 12, 2001
    Publication date: June 20, 2002
    Inventors: Tsuyoshi Iwa, Kazuya Sakata, Shoji Kawasaki, Masaaki Shin