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:
Sep. 02, 1986
Filed:
Nov. 09, 1984
Mary L Hausman, Barto, PA (US);
William E Lenney, Allentown, PA (US);
Gerald D Miller, Macungie, PA (US);
Air Products and Chemicals, Inc., Allentown, PA (US);
Abstract
Aqueous vinyl ester/acrylate copolymer emulsions possessing enhanced wet pick strength in paper coating compositions comprise a vinyl ester/acrylate copolymer colloidally dispersed in an aqueous medium, the copolymer consisting essentially of (a) a vinyl ester of a C.sub.1 -C.sub.12 alkanoic acid, (b) 2 to 50 wt % of an alkyl acrylate, and (c) 0.1 to 10 wt % of an ethylenically unsaturated mono- or dicarboxylic acid or half ester thereof. The copolymer is prepared by an aqueous emulsion polymerization process comprising the use of a stabilizer system consisting essentially of an alkylphenoxy polyethoxy ethanol and an anionic surfactant and, in the preferred embodiment, the use of a seeding procedure.