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. 04, 2014
Filed:
Jul. 17, 2010
Albert Frank, Xanten, DE;
René Nagelsdiek, Hamminkeln, DE;
Jürgen Omeis, Dorsten-Lembeck, DE;
Bernd Göbelt, Wesel, DE;
Wojciech Jaunky, Wesel, DE;
Albert Frank, Xanten, DE;
René Nagelsdiek, Hamminkeln, DE;
Jürgen Omeis, Dorsten-Lembeck, DE;
Bernd Göbelt, Wesel, DE;
Wojciech Jaunky, Wesel, DE;
BYK-Chemie GmbH, , DE;
Abstract
A process for preparing a randomly branched copolymer, by reacting the components (a) 10-98.9 mol % of at least one acrylic ester of a straight-chain, branched or cyclic C-C-alkyl monoalcohol, (b) 0.1-10 mol % of at least one polyethylenically unsaturated monomer and (c) optionally one or more monoethylenically unsaturated monomers other than acrylic esters of straight-chain, branched or cyclic C-C-alkyl monoalcohols and other than compounds of the formula (I), in the presence of (d) 1-10 mol % of at least one compound of the formula (I) HC—CRR—CH—CR—CH(I) where R, Rare each independently aryl, CN or COORwhere R═H, alkyl, aryl or aralkyl, and R=alkyl, aryl or aralkyl, and is the presence of at least one initiator of free-radical polymerization in a free-radical polymerization, where the stated molar proportions of components (a), (b), (c) and (d) add up to 100 mol %, and where the molar proportion of component (b) does not exceed the molar proportion of component (d), Copolymers obtainable by the process and use thereof as levelling agents in coating substances.