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:
Apr. 13, 1976
Filed:
Oct. 21, 1974
Donald A Kangas, Midland, MI (US);
W Robert Neuendorf, Midland, MI (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
Fluid, stable compositions containing aqueous disperse systems of (1) anionizable material, e.g., an aqueous solution of an organic polymer having carboxylate functionality, and (2) a water-dispersible amphoteric polyelectrolyte, e.g., a copolymer of 2-aminoethyl methacrylate and methacrylic acid, reversibly coavervated by maintaining the pH of the composition at a value below the isoelectric point of the amphoteric polyelectrolyte and a value at which the disperse material contains anions. The resulting coacervate is readily redispersed by increasing the pH of the coacervate to a value above the isoelectric point of the polyelectrolyte. Such compositions are useful in warp sizing of yarns and in other coating applications.