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:
Apr. 11, 2017
Filed:
Jun. 04, 2013
Basf SE, Ludwigshafen, DE;
Ekkehard Jahns, Weinheim, DE;
Hans-Juergen Denu, Friedelsheim, DE;
Sebastian Roller, Mannheim, DE;
Alexander Kurek, Thierhaupten, DE;
BASF SE, Ludwigshafen, DE;
Abstract
The present invention relates to the use of aqueous multistage polymer dispersions obtainable by free-radically initiated aqueous emulsion polymerization, having a soft phase and a hard phase and having a hard-to-soft stage ratio of 25% to 95% by weight to 75% to 5% by weight, the glass transition temperature (Tg) of the soft phase, as first stage, being −30 to 0° C. and that of the hard phase, as second stage, being 20 to 60° C., comprising at least one monomer of the general formula I in which the variables have the following definitions:n=0 to 2,R1, R2, R3=independently of one another hydrogen or methyl group,X═O or NH,Y═H, alkali metal or NH,to coat metal sheets.