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:
Mar. 12, 2019
Filed:
Jul. 21, 2016
Applicant:
Basf SE, Ludwigshafen am Rhein, DE;
Inventors:
Assignees:
BASF SE, Ludwigshafen, DE;
BASF (THAI) LTD., Bangkok, TH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J 20/26 (2006.01); A61L 15/60 (2006.01); C08F 2/01 (2006.01); C08F 2/10 (2006.01); C08F 220/06 (2006.01); C09D 183/08 (2006.01); C08J 3/12 (2006.01); C08L 33/02 (2006.01); A61L 15/22 (2006.01); B01J 19/06 (2006.01); B01J 20/30 (2006.01); C08J 3/24 (2006.01); C08G 77/28 (2006.01);
U.S. Cl.
CPC ...
B01J 20/267 (2013.01); A61L 15/225 (2013.01); A61L 15/60 (2013.01); B01J 19/06 (2013.01); B01J 20/261 (2013.01); B01J 20/3085 (2013.01); C08F 2/01 (2013.01); C08F 2/10 (2013.01); C08F 220/06 (2013.01); C08J 3/12 (2013.01); C08J 3/247 (2013.01); C09D 183/08 (2013.01); B01J 2219/0015 (2013.01); B01J 2219/00076 (2013.01); C08G 77/28 (2013.01); C08J 2333/02 (2013.01); C08L 33/02 (2013.01);
Abstract
The invention relates to a process for producing superabsorbents, comprising the preparation of partly neutralized acrylic acid by the steps (i) preparing an over-neutralized acrylic acid having a degree of neutralization of at least 100.1 mol-% by mixing of an acrylic acid 1 and a base and (ii) preparing a neutralized acrylic acid having a degree of neutralization from 50 to 85 mol-% by mixing of the over-neutralized acrylic acid and an acrylic acid 2, wherein the content of dimeric acrylic acid in the acrylic acid 2 is lower than the content of dimeric acrylic acid in the acrylic acid 1.