Process for preparing a (meth)acrylate copolymer containing tertiary amino groups by free-radical polymerization in solution

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United States of America Patent

PATENT NO 8859697
APP PUB NO 20130190468A1
SERIAL NO

13876277

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Abstract

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The invention relates to a process for preparing a (meth)acrylate copolymer containing tertiary amino groups by free-radical polymerization in solution from a monomer mixture selected from a) 30 to 70% by weight of a C1-C4-alkyl ester of acrylic acid or methacrylic acid and b) 70 to 30% by weight of an alkyl ester of acrylic acid or methacrylic acid with a tertiary amino group in the alkyl radical and c) 0 to 10% of further copolymerizable vinyl monomers, whereby one or more polymerization initiators, optionally one or more molecular weight regulators and one or more solvents or of a solvent mixture are added to the monomer mixture to give a polymerization mixture, which is polymerized at temperatures from 30 to 120° C. over a period of 2 to 24 hours, where the polymerization mixture is finally polymerized to give a polymerization syrup with a conversion of the monomers to the copolymer of at least 99% by weight, where the polymerization syrup is subsequently degassed by distillation or by extrusion and the degassed polymerization syrup is further comminuted to a copolymer preparation in the form of a granulate or powder, where the copolymer preparation is characterized by a molecular weight (Mw) of 25.000 to 75.000 g/mol a polydispersity index of 2.1 to 2.9 and a residual solvent concentration of less than 1.000 ppm by weight.

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Patent Owner(s)

Patent OwnerAddress
EVONIK OPERATIONS GMBHRELLINGHAUSER STRASSE 1-11 ESSEN 45128

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Boehmann, Pamela Weiterstadt, DE 2 3
Denger, Marcus Brensbach, DE 3 6
Hoffmann, Norbert Griesheim, DE 14 72
Klosendorf, Andreas Bad Schwalbach, DE 4 29
Kueksal, Alpertunga Nuremberg, DE 2 3
Meier, Christian Darmstadt, DE 67 631
Papadopoulos, Nikolaos Ginsheim-Gustavsburg, DE 9 66
Vorholz, Johannes Alxenau, DE 9 10
Weber, Andreas Frankfurt, DE 206 1565

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