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:
May. 25, 1982
Filed:
Jul. 31, 1980
William J Fairchok, Midland, MI (US);
Frederick W Stanley, Jr, Midland, MI (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
Water-miscible monomers such as acrylamide are polymerized continuously to produce a concentrated solution of a high molecular weight polymer by passing a mixture of a water-immiscible organic liquid and an aqueous solution of at least 20 weight percent of the monomer through a tubular reactor, e.g., a polyethylene tube, having internal surfaces that are readily wetted by the hydrocarbon liquid and polymerizing the monomer in the reactor. The polymerized product is recovered as a water-in-oil emulsion wherein the polymer resides in the dispersed aqueous phase or as a solid strand which is a high solids aqueous solution containing at least 20 weight percent of the water-soluble polymer of the water-miscible monomer.