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:
Mar. 01, 2016
Filed:
Jan. 31, 2014
Rohm and Haas Company, Philadelphia, PA (US);
James C. Bohling, Lansdale, PA (US);
Beth Cooper, Doylestown, PA (US);
Wei Gao, Fort Washington, PA (US);
Linus W. Linder, Harleysville, PA (US);
Alvin M. Maurice, Lansdale, PA (US);
ROHM AND HAAS COMPANY, Philadelphia, PA (US);
Abstract
The present invention relates to a process comprising contacting methyl methacrylate or styrene; a C-C-alkyl acrylate; and a polymerizable carboxylic acid monomer with a stable aqueous dispersion of first polymer particles, under emulsion polymerization conditions, to form a stable aqueous dispersion of second polymer particles. The first polymer particles have a Tin the range of from −30° C. to 30° C., and the monomers have a calculated Tin the range of 50° C. to 120° C. The present invention also relates to the dispersion of second polymer particles, which is useful as a binder to improve freeze-thaw stability in a coatings formulation.