Patents by Inventor Daisuke Shibai

Daisuke Shibai 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).

  • Powder dispersant for hydraulic compositions
    Patent number: 7030177
    Abstract: The present invention provides a powdery dispersant for hydraulic compositions, which is excellent in pumping before drying and in pressure resistance and humidity resistance, which comprises one or more copolymers obtained by polymerizing a specific vinyl monomer (1) such as an ethylenically unsaturated carboxylic acid derivative having a polyoxyalkylene group with a specific vinyl monomer (b) such as (meth)acrylic acid etc., wherein the average number of C2-4 oxyalkylene groups or oxystyrene groups added is 45 to 150, (a)/[(a)+(b)]×100 ranges from 15 to 45 (mol-%), and at least a part of the copolymers are monovalent or polyvalent metal salts.
    Type: Grant
    Filed: April 22, 2004
    Date of Patent: April 18, 2006
    Assignee: Kao Corporation
    Inventors: Daisuke Shibai, Kyoichi Shirota
  • Powder dispersant for hydraulic compositions
    Publication number: 20040242760
    Abstract: The present invention provides a powdery dispersant for hydraulic compositions, which is excellent in pumping before drying and in pressure resistance and humidity resistance, which comprises one or more copolymers obtained by polymerizing a specific vinyl monomer (1) such as an ethylenically unsaturated carboxylic acid derivative having a polyoxyalkylene group with a specific vinyl monomer (b) such as (meth)acrylic acid etc., wherein the average number of C2-4 oxyalkylene groups or oxystyrene groups added is 45 to 150, (a)/[(a)+(b)]×100 ranges from 15 to 45 (mol-%), and at least a part of the copolymers are monovalent or polyvalent metal salts.
    Type: Application
    Filed: April 22, 2004
    Publication date: December 2, 2004
    Applicant: Kao Corporation
    Inventors: Daisuke Shibai, Kyoichi Shirota
  • Powder dispersant for hydraulic compositions
    Publication number: 20020099115
    Abstract: The present invention provides a powdery dispersant for hydraulic compositions, which is excellent in pumping before drying and in pressure resistance and humidity resistance, which comprises one or more copolymers obtained by polymerizing a specific vinyl monomer (a) such as an ethylenically unsaturated carboxylic acid derivative having a polyoxyalkylene group with a specific vinyl monomer (b) such as (meth)acrylic acid etc., wherein the average number of C2-4 oxyalkylene groups or oxystyrene groups added is 45 to 150, (a)/[(a)+(b)]×100 ranges from 15 to 45 (mole-%), and at least a part of the copolymers are monovalent or polyvalent metal salts.
    Type: Application
    Filed: November 28, 2001
    Publication date: July 25, 2002
    Inventors: Daisuke Shibai, Kyoichi Shirota