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. 15, 1980
Filed:
May. 04, 1979
Kenneth G Phillips, River Forest, IL (US);
Mary E Bingham, Palos Hills, IL (US);
Nalco Chemical Co., Oak Brook, IL (US);
Abstract
A method of producing a water-in-oil emulsion of ammonium polyacrylate which comprises polymerizing a water-in-oil emulsion of ammonium acrylate in the presence of a water-in-oil emulsifier, and a free radical polymerization catalyst with the amount of oil initially present in said emulsion being at least 15% by weight, continuing said polymerization until substantially all of the ammonium acrylate has polymerized to form ammonium polyacrylate, allowing a major portion of the oil in the oil phase of the emulsion to separate as a polymer-free upper layer, thus leaving as a lower layer a water-in-oil emulsion of ammonium polyacrylate, which emulsion contains less than 10% by weight of oil. Also described are the polymeric emulsions produced using the above described method.