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:
Sep. 18, 2012
Filed:
Jun. 23, 2011
Robert Baumann, Rueschlikon, CH;
Juergen Dombrowski, Halle, DE;
Hartmut Kuehn, Halle, DE;
Etienne Lazarus, Marienthal, FR;
Gerold a Lohmuller, Baden-Baden, DE;
Margarita Perello, Dubendorf, CH;
Yafei Zhu, Shanghai, CN;
Robert Baumann, Rueschlikon, CH;
Juergen Dombrowski, Halle, DE;
Hartmut Kuehn, Halle, DE;
Etienne Lazarus, Marienthal, FR;
Gerold A Lohmuller, Baden-Baden, DE;
Margarita Perello, Dubendorf, CH;
Yafei Zhu, Shanghai, CN;
Dow Global Technologies LLC, Midland, MI (US);
Abstract
A water redispersible polymer powder is produced by drying an aqueous mixture of a high Tcarboxylated styrene butadiene polymer and a low Tcarboxylated styrene butadiene polymer, where the ratio of the mean or average particle size of the high Tpolymer to the particle size of the low Tpolymer is from 1:1 to 5:1, preferably from 1:1 to 3:1, and the amount of the high Tpolymer is from 20 wt. % to 35 wt. %, preferably from 25 wt. % to 30 wt. %, based upon the total weight of the high Tpolymer and the low Tpolymer. Cement compositions such as mortars, which contain the redispersible polymer powder exhibit unexpectedly superior high bond strength and high impact resistance.