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. 08, 2013
Filed:
Jan. 12, 2009
Klaus Lorenz, Zangberg, DE;
Gerhard Albrecht, Prien am Chiemsee, DE;
Silke Flakus, Ebersberg, DE;
Alexander Kraus, Evenhausen, DE;
Helmut Mack, Traunstein, DE;
Petra Wagner, Trostberg, DE;
Barbara Wimmer, Tacherting, DE;
Christian Scholz, Wald an der Alz, DE;
Angelika Hartl, Emertsham, DE;
Martin Winklbauer, Halsbach, DE;
Klaus Lorenz, Zangberg, DE;
Gerhard Albrecht, Prien am Chiemsee, DE;
Silke Flakus, Ebersberg, DE;
Alexander Kraus, Evenhausen, DE;
Helmut Mack, Traunstein, DE;
Petra Wagner, Trostberg, DE;
Barbara Wimmer, Tacherting, DE;
Christian Scholz, Wald an der Alz, DE;
Angelika Hartl, Emertsham, DE;
Martin Winklbauer, Halsbach, DE;
Construction Research & Technology GmbH, Trostberg, DE;
Abstract
The invention relates to a process for the preparation of an aqueous solution comprising 30 to 95% by weight of water and 5 to 70% by weight of a copolymer dissolved in the water by free radical solution polymerizations of an isoprenol polyether derivative with an acrylic acid derivative, so that the copolymer has 20 to 45 mol % of an isoprenol polyether derivative structural unit and 55 to 80 mol % of an acrylic acid derivative structural unit. The aqueous solution is suitable as a superplasticizer for hydraulic binders.