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:
Mar. 02, 1976
Filed:
Jul. 09, 1974
John Carl Solenberger, Wilmington, DE (US);
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
Stable, fluid polyvinyl alcohol-containing microgels in water having a Brookfield viscosity of 1.15 to 1000 centipoises may be prepared more economically from a dry blend which comprises (A) a polymer mixture consisting of at least about 0.5% by weight of polyvinyl alcohol and one or more polysaccharide selected from the group consisting of up to about 99.5% by weight of starch and up to about 33% by weight of sodium carboxymethylcellulose, said polyvinyl alcohol having a Hoeppler viscosity of about 4 to 150 centipoises and having at least about 50 mole percent of the monomeric units present as vinyl alcohol units, (B) water-soluble, solid titanium salt of a hydroxy carboxylic acid of 2 to 10 carbon atoms in an amount which provides about 0.05 to 10 parts by weight of tetravalent titanium ions per 100 parts of polymer mixture, and (C) about 0.05 to 20 parts by weight of water-soluble, solid hydroxy carboxylic acid of 2 to 10 carbon atoms per 100 parts of polymer mixture.