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:
Dec. 01, 2015
Filed:
Sep. 21, 2011
Styrene-butadiene based redispersible polymer powders with improved stability in cement applications
Etienne Lazarus, Marienthal, FR;
Gerold Lohmüller, Baden-Baden, DE;
Juergen Dombrowski, Halle, DE;
Hartmut Kuehn, Halle, DE;
Margarita Perello, Duberdorf, CH;
Sonja Scharlemann, Wedemark, DE;
Etienne Lazarus, Marienthal, FR;
Gerold Lohmüller, Baden-Baden, DE;
Juergen Dombrowski, Halle, DE;
Hartmut Kuehn, Halle, DE;
Margarita Perello, Duberdorf, CH;
Sonja Scharlemann, Wedemark, DE;
Dow Global Technologies, LLC, Midland, MI (US);
Abstract
A water redispersible polymer powder is produced by drying an aqueous mixture of a carboxylated styrene butadiene polymer and a colloidal stabilizer which includes a polyvinyl alcohol modified with an alkyl end chain. The alkyl modified polyvinyl alcohol provides excellent redispersibility of the redispersible polymer powder without adversely affecting spray drying. Cement compositions such as mortars, which contain the redispersible polymer powder with the alkyl modified polyvinyl alcohol exhibit unexpectedly superior stability and an unexpectedly lower rate of mortar viscosity buildup which is advantageous for workability or troweling.