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
Mixture of polyvinyl alcohol-polysaccharide microgel in water comprising water and, based on the total mixture, about 0.1 to 10 percent by weight of a partially crosslinked mixture of polyvinyl alcohol and polysaccharide in which the mixture is partially crosslinked with titanium ions, said polyvinyl alcohol being present in an amount of 0.05 to 9.95 percent by weight, said polysaccharide being present in the amount of about 0.05 to 9.95 percent by weight and being selected from the group consisting of about 0.05 to 9.95 percent by weight of starch and about 0.05 to 3 percent by weight of sodium carboxymethylcellulose, said microgel being a stable fluid derived from polyvinyl alcohol which has a Hoeppler viscosity of about 4 to 150 centipoises and in which at least about 50 mole percent of the monomeric units are vinyl alcohol units, the water and partially crosslinked mixture of polyvinyl alcohol and polysaccharide having a Brookfield viscosity of about 1.15 to 1000 centipoises, the viscosity being at least about 15 percent greater than the viscosity of the aqueous polyvinyl alcohol-polysaccharide mixture from which the microgel is derived. The microgels are useful as size for paper, as paper coatings, as warp size for textile fibers, and as adhesives.