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:
Aug. 04, 2015
Filed:
Feb. 10, 2011
Applicants:
Kouki Fukumura, Kurume, JP;
Hironori Kuboi, Ogori, JP;
Keiichi Fukuda, Omuta, JP;
Inventors:
Assignee:
MITSUI CHEMICALS, INC., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G 69/08 (2006.01); C08G 69/48 (2006.01); C07C 229/22 (2006.01); C08G 73/10 (2006.01);
U.S. Cl.
CPC ...
C08G 73/1092 (2013.01);
Abstract
Disclosed are a method for producing a polyaspartic acid precursor polymer by polymerization using at least one kind selected from a product obtained from maleic anhydride and ammonia and, maleamic acid as a monomer, wherein at least part of carboxyl groups in the monomers are a tertiary amine salt; and an industrially inexpensive and simple method for producing a polyaspartic acid salt by treating the polyaspartic acid precursor polymer obtained by this method with a basic aqueous solution.