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:
Feb. 11, 2014
Filed:
Jan. 12, 2009
Christian Schwede, Weinheim, DE;
Mario Vierle, Wasserburg, DE;
Timo Mangel, Ötigheim, DE;
Gerhard Albrecht, Prien a. Chiemsee, DE;
Volker Herzog, Darmstadt, DE;
Klaus Arlt, Hamminkeln, DE;
Christian Schwede, Weinheim, DE;
Mario Vierle, Wasserburg, DE;
Timo Mangel, Ötigheim, DE;
Gerhard Albrecht, Prien a. Chiemsee, DE;
Volker Herzog, Darmstadt, DE;
Klaus Arlt, Hamminkeln, DE;
Construction Research & Technology GmbH, Trostberg, DE;
Abstract
The invention relates to a process for the preparation of copolymer in a continuous mode of operation in a polymerization apparatus, comprising a polymerization reactor having feed lines and an outflow, free radical polymerization initiator, an acid monomer and polyether macromonomer being passed as monomeric starting materials into the polymerization reactor through the feed lines, initiator, monomeric starting materials and copolymer-containing reaction composition thermostated at −20 to +120° C. being present in the polymerization reactor, copolymer-containing reaction composition being discharged from the polymerization reactor through the outflow, the introduction of the polyether macromonomer into the polymerization reactor being effected separately from the acid monomer in a manner such that the polyether macromonomer is mixed with the initiator, monomeric starting materials and copolymer-containing reaction composition in the polymerization reactor and comes into contact with the acid monomer for the first time thereby.