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US 3,941,728 AGranted
Polyvinyl alcohol-polysaccharide microgels
AssigneeE. I. Du Pont de Nemours and Company
InventorJohn Carl Solenberger
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AssigneeE. I. Du Pont de Nemours and Company
InventorJohn Carl Solenberger
Estimating the term…
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.
A mixture of polyvinyl alcoholpolysaccharide microgel in water comprising water and, based on the total mixture, 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 a titanium complex containing tetravalent titanium ions in an amount of 0.05 to 10 parts by weight per 100 parts of said mixture of polyvinyl alcohol and polysaccharide, said polyvinyl alcohol being present in the amount of 0.05 to 9.95 percent by weight, said polysaccharide being present in the amount of 0.05 to 9.95 percent by weight and being selected from the group consisting of 0.05 to 9.95 percent by weight of starch and 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 4 to 150 centipoises and in which at least 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 1.15 to 1000 centipoises, the viscosity being at least 15 percent greater than the viscosity of the aqueous polyvinyl alcohol-polysaccharide mixture from which the microgel is derived.
A mixture of polyvinyl alcoholstarch microgel in water comprising water and, based on the total mixture, 0.1 to 10 percent by weight of a partially crosslinked mixture of polyvinyl alcohol and starch in which the mixture is partially crosslinked with a titanium complex containing tetravalent titanium ions in an amount of 0.05 to 10 parts by weight per 100 parts of said mixture of polyvinyl alcohol and polysaccharide, the polyvinyl alcohol being present in the amount of 0.05 to 9.95 percent by weight, and the starch being present in the amount of 0.05 to 9.95 percent by weight, the microgel being a stable fluid derived from polyvinyl alcohol which has a Hoeppler viscosity of 4 to 150 centipoises and in which at least 50 mole percent of the monomeric units are vinyl alcohol units, the water and partially crosslinked mixture of polyvinyl alcohol and starch having a Brookfield viscosity of 1.15 to 1000 centipoises, the viscosity being at least 15 percent greater than the viscosity of the aqueous polyvinyl alcohol-starch mixture from which the microgel is derived.
Dependencies are inferred from the claim text.