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:
Oct. 01, 2013
Filed:
Dec. 10, 2010
James Bohling, Lansdale, PA (US);
Paul F. Doll, North Wales, PA (US);
David L. Frattarelli, West Chester, PA (US);
Kathleen R. Manna, Quakertown, PA (US);
Alvin M. Maurice, Lansdale, PA (US);
James Bohling, Lansdale, PA (US);
Paul F. Doll, North Wales, PA (US);
David L. Frattarelli, West Chester, PA (US);
Kathleen R. Manna, Quakertown, PA (US);
Alvin M. Maurice, Lansdale, PA (US);
Rohm and Haas Company, Philadelphia, PA (US);
Abstract
This invention provides stable aqueous compositions including stable coating compositions, and methods of their production. The stable aqueous compositions and stable aqueous coating compositions comprise one or more emulsion-polymerized addition polymer, one or more carboxylesterase enzyme, and one or more carboxylesterase deactivating agent, such that the ester hydrolysis activity in the composition is less than 0.010 micromole/minute, and wherein the aqueous composition has a headspace volatile organic compound (VOC) content, as measured by headspace gas chromatography-mass spectrometry (GC-MS) at 33° C., of less than 10 ppm of organic carboxylester with a normal boiling point of less than 150° C. and more than 50 ppm of mono-alcohol with a formula molecular weight of less than 76. The carboxylesterase enzyme is employed to minimize the free carboxylester content in the composition, thereby providing a low odor composition, and the carboxylesterase is deactivated in situ in order to minimize the residual carboxylesterase enzyme activity.