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. 13, 2015
Filed:
Sep. 26, 2012
Wacker Chemical Corporation, Adrian, MI (US);
Christian Leonard Daniels, Fogelsville, PA (US);
WACKER CHEMICAL CORPORATION, Adrian, MI (US);
Abstract
A process for preparing an aqueous emulsifier-stabilized vinyl acetate-ethylene copolymer dispersion with weight average particle size in a range from 100 nm to 300 nm includes emulsion polymerization of a reaction mixture including: a) vinyl acetate and ethylene, b) 0.05 to 1% by weight, based on the total weight of monomers and comonomers, of at least one functional comonomer selected from the group consisting of ethylenically unsaturated monomers with at least one phosphate group or phosphonic acid group or their salts and ethylenically unsaturated sulphonic acids or their salts,c) 0.5 to 5% by weight, based on the total weight of monomers and comonomers, of at least one anionic emulsifier and optionally one or more nonionic emulsifiers, andd) optionally at most 0.5%, based on the total weight of monomers and comonomers, of a protective colloid. The process reactor uses an external heat exchange circuit.