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:
Oct. 16, 2018
Filed:
Aug. 25, 2016
Rohm and Haas Company, Philadelphia, PA (US);
Ibrahim Eryazici, Limerick, PA (US);
Bradley K. Hageman, Pottstown, PA (US);
Joseph M. Hoefler, Perkiomenville, PA (US);
Edwin Nungesser, Horsham, PA (US);
Rohm and Haas Company, Philadelphia, PA (US);
Abstract
The present invention provides aqueous composition comprising a multi-stage acrylic emulsion polymer having a first stage polymer of from 0.5 to 4 wt. %, based on the total weight of monomers used to make the first stage polymer, of a copolymerized carboxylic acid or salt group containing monomer, and having 10 to 30 wt. %, on total solids of the multi-stage acrylic emulsion polymer, of a second stage polymer of from 3 to 15 wt. % of a copolymerized hydroxyl group containing monomer, the first stage polymer having a glass transition temperature (Tg) by dynamic mechanical analysis (DMA) of less than −10° C. and the second stage polymer having a Tg (DMA) of greater than 80° C.; and (ii) from 25 to 75 wt. %, based on the total solids weight of the multi-stage acrylic polymer, of a polyurethane.