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:
Sep. 17, 2013
Filed:
Nov. 25, 2009
Gerhard Albrecht, Prien am Chiemsee, DE;
Helmut Mack, Traunstein, DE;
Klaus Lorenz, Zangberg, DE;
Mario Vierle, Wasserburg, DE;
Silke Flakus, Ebersberg, DE;
Petra Wagner, Trostberg, DE;
Christian Scholz, Wald an der Alz, DE;
Harald Grassl, Feichten an der Alz, DE;
Barbara Wimmer, Tacherting, DE;
Gerhard Albrecht, Prien am Chiemsee, DE;
Helmut Mack, Traunstein, DE;
Klaus Lorenz, Zangberg, DE;
Mario Vierle, Wasserburg, DE;
Silke Flakus, Ebersberg, DE;
Petra Wagner, Trostberg, DE;
Christian Scholz, Wald an der Alz, DE;
Harald Grassl, Feichten an der Alz, DE;
Barbara Wimmer, Tacherting, DE;
Construction Research & Technology GmbH, Trostberg, DE;
Abstract
A process for the preparation of a copolymer in semicontinuous operation in a polymerization apparatus, comprising a polymerization reactor connected to a metering device, acid monomer being initially taken in the metering device and polyether macromonomer, acid monomer and water in the polymerization reactor, acid monomer being metered from the metering device into the polymerization reactor, the metering of the acid monomer being effected with the proviso that at least 70 mol % of the acid monomer metered in altogether are metered in the course of 5 to 19 minutes at a metering rate that is constant or varies to a limited extent.