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:
Jul. 23, 2013
Filed:
Jun. 25, 2009
Hongli Willimann, Baar, CH;
Hans Wicki, Malters, CH;
Urs Heini, Neuenkirch, CH;
Alexander Zapf, Obfelden, CH;
Robert Koelliker, Oberkirch, CH;
Hongli Willimann, Baar, CH;
Hans Wicki, Malters, CH;
Urs Heini, Neuenkirch, CH;
Alexander Zapf, Obfelden, CH;
Robert Koelliker, Oberkirch, CH;
Akzo Nobel N.V., Arnhem, NL;
Abstract
The present invention pertains to a water-redispersible polymer powder based on at least one modified natural latex. The modified natural latex can be obtained by mixing natural latex with at least one radical initiator and/or oxidizing agent, by mixing and reacting natural latex with at least one olefinically unsaturated monomer and with at least one radical initiator, and/or by mixing natural latex with at least one filler. Preferably, the polymer powder contains up to about 95 wt. % of least one natural latex, about 0 to 50 wt. % of at least one protective colloid, about 2 to 70 wt. % of at least one filler and/or anti-caking agent, as well as optionally further additives. In addition, the invention pertains to a process for the preparation of the polymer powder, the use thereof as an additive in building material compositions, as well as building material compositions containing the polymer powder.