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. 08, 2014
Filed:
Apr. 17, 2012
Applicants:
Jianming Xu, Shanghai, CN;
Tingke Zhang, Shanghai, CN;
Hui Liu, Shanghai, CN;
Inventors:
Assignee:
Rohm and Haas Company, Philadelphia, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08K 5/16 (2006.01); C08G 59/50 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides an aqueous copolymer dispersion comprising a copolymer and a polyamine, the copolymer comprises, as copolymerized units, at least one nonionic monomer selected from (meth)acrylate C-Calkyl ester or Versatic vinyl ester; wherein the amount of the nonionic monomer ranges from 15% to less than 50% and wherein the amount of the polyamine ranges from 0.1 to 2%, by dry weight percentage based on the dry weight of the copolymer. The copolymer dispersion is suitable for use in coating compositions such as stone paints with significant improvement of water whitening resistance.