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:
Mar. 01, 2016
Filed:
Apr. 14, 2009
Matthias Gerst, Neustadt, DE;
Gerhard Auchter, Bad Duerkheim, DE;
Gledison Fonseca, Mannheim, DE;
Cornelis Petrus Beyers, Altrip, DE;
Matthias Gerst, Neustadt, DE;
Gerhard Auchter, Bad Duerkheim, DE;
Gledison Fonseca, Mannheim, DE;
Cornelis Petrus Beyers, Altrip, DE;
BASF SE, Ludwigshafen, DE;
Abstract
The present invention relates to aqueous polymer dispersions having a polymer content of at least 55% by weight that are suitable for pressure sensitive adhesives. The invention also relates to a process for preparing these aqueous polymer dispersions and the use of the aqueous polymer dispersions in pressure sensitive adhesives and, respectively, pressure sensitive adhesive compositions, especially in pressure sensitive adhesives for transparent substrates, such as plastics labels. The aqueous polymer dispersions have a polymer content of at least 55% by weight, based on the total weight of the dispersion. The polymer is composed of ethylenically unsaturated monomers and has a glass transition temperature below −10° C., in which the dispersed polymer particles have a polymodal particle size distribution, in which at least 70% by weight of the polymer particles have a particle diameter of below 350 nm.