The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 21, 2011
Filed:
Sep. 04, 2006
Masaaki Shimoda, Wakayama, JP;
Yoshinao Kono, Wakayama, JP;
Toshimasa Hamai, Wakayama, JP;
Daisuke Hamada, Wakayama, JP;
Yoshikazu Morii, Wakayama, JP;
Yoshihito Naka, Wakayama, JP;
Yoshiaki Tanisho, Wakayama, JP;
Masaaki Shimoda, Wakayama, JP;
Yoshinao Kono, Wakayama, JP;
Toshimasa Hamai, Wakayama, JP;
Daisuke Hamada, Wakayama, JP;
Yoshikazu Morii, Wakayama, JP;
Yoshihito Naka, Wakayama, JP;
Yoshiaki Tanisho, Wakayama, JP;
Kao Corporation, Tokyo, JP;
Abstract
Method for producing phosphoric acid ester-based polymer by copolymerizing monomer 1 of formula (1), monomer 2 of formula (2), and monomer 3 of formula (3): wherein the variables are as defined in the specification; wherein the variables are as defined in the specification; and wherein the variables are as defined in the specification, at pH ≦7 in solvent having dissolved oxygen concentration of 0.01-4.0 mg/kg, or in presence of phosphonic acid-based chelating agent, or by mixing monomers 1 to 3 at 10-50 ° C., initiating polymerization within 72 hours, and maintaining the temperature at 10-50 ° C. until polymerization is initiated. The phosphoric acid ester-based polymer may be used as a dispersant in a hydraulic composition.