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:
Apr. 19, 2016
Filed:
Dec. 21, 2011
Norihiro Wakao, Osaka, JP;
Akihiko Kanzaki, Osaka, JP;
Junichi Chosa, Osaka, JP;
NIPPON SHOKUBAI CO., LTD., Osaka, JP;
Abstract
An object of the present invention is to provide an aqueous poly(meth)acrylic acid (salt) solution having high dispersibility of inorganic substances and demonstrating dispersibility having sufficient stability over time, and a process for preparing the same. The present invention relates to an aqueous poly(meth)acrylic acid (salt) solution comprising a poly(meth)acrylic acid (salt) having a weight average molecular weight of 1000 to 10000 polymerized in the presence of a phosphorus compound containing hypophosphorous acid (salt), wherein the phosphorus compound contains 0 to 0.3% by mass of a phosphorous acid (salt) based on 100% by mass of the phosphorus compound, and the aqueous poly(meth)acrylic acid (salt) solution contains 0 to 10000 ppm of an inorganic anion and a process for the preparation thereof.