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:
Jan. 12, 2016
Filed:
Jun. 17, 2011
Norihiro Wakao, Suita, JP;
Akihiko Kanzaki, Suita, JP;
Junichi Chosa, Suita, JP;
NIPPON SHOKUBAI CO, LTD, Osaka, JP;
Abstract
An aqueous solution containing a poly(meth)acrylic acid-based polymer which shows excellent dispersibility for inorganic substances, satisfactory long-term dispersibility, and a favorable color is provided. The aqueous solution of the present invention is an aqueous solution comprising a poly(meth)acrylic acid-based polymer, the poly(meth)acrylic acid-based polymer including carboxyl groups, wherein in 100 mol % of the carboxyl groups, 30 to 85 mol % of the carboxyl groups are in an alkali metal salt form of the carboxyl groups, and 15 to 70 mol % of the carboxyl groups are in an acid form of the carboxyl groups, the poly(meth)acrylic acid-based polymer containing a phosphorus-containing group, the poly(meth)acrylic acid-based polymer having a weight average molecular weight of 2000 to 9000, the aqueous poly(meth)acrylic acid-based polymer solution having a concentration of inorganic anions, each including a sulfur or phosphorus atom, of 1000 to 10000 ppm relative to the aqueous poly(meth)acrylic acid-based polymer solution.