Oxidation in solid state of oxidizable galactose type of alchohol configuration containing polymer
AssigneeHercules Incorporated
InventorsRichard Lee Brady, Raymond Thomas Leibfried, Sr., Tuyen Thanh Nguyen
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Abstract
Composition comprising oxidizable galactose type of alcohol configuration containing polymer (such as guar) which is in solid state and galactose oxidase. Application of such oxidized polymers in the papermaking process results in superior paper strength characteristics.
Claims28
A composition comprising (a) a polymer which is in solid state and contains groups having oxidizable galactose type of alcohol configuration and (b) galactose oxidase, wherein the groups having oxidizable galactose type of alcohol configuration are described by the following chemical structures ##STR2## where R1 is an alkyl group of the formula C(n)H(2n+1) where n is 0 to 20:
- z is 0 or 1;
- where R2 is a linking group composed of an alkylene or an aromatic alkylene or an alkylene ether, or an alkylene ester, or an alkylene amide, or an alkylene urethane diradical where said linking group has a total number of carbons from 2 to 20;
- where R3 is --H, --OH, --OCH.sub.3, --OC.sub.2 H.sub.5, --OC.sub.3 H.sub.7, --OC.sub.4 H.sub.9, --OOCR5, (where R5 is alkyl radical of 1 to 5 carbons), --NH.sub.2, --NH--CO--R5;
- and y is 0 or 1;
- and wherein the oxidizable galactose type of alcohol group containing polymer is selected from the group consisting of galactomannan gums or their ether derivatives, arabinogalactan gums their ether derivatives, carubin, lichenan, tamarind and potato galactan galactoglucomannan hemicelluloses or their ether derivatives and synthetically or enzymatically modified polymers selected from the group consisting of polysaccharides, polyacrylamides, polyacrylates, polyamides polyvinyl alcohol, and polyvinyl acetate, and wherein the lower limit of oxidizable galactose type of alcohol group containing polymer is about 50% based upon the weight of the composition.
A process for the oxidation of a polymer containing groups having an oxidizable galactose type of alcohol configuration comprising:
- providing the oxidizable galactose type of alcohol configuration containing polymer which is in solid state and galactose oxidase, and contacting them wherein the groups having the oxidizable galactose type of alcohol configuration are described by the following chemical structures ##STR3## where R1 is an alkyl group of the formula C(n)H(2n+1) where n is 0 to 20:
- z is 0 or 1, where R2 is a linking group composed of an alkylene or an aromatic alkylene or an alkylene ether, or an alkylene ester, or an alkylene amide, or an alkylene urethane diradical where said linking groups has a total number of carbon from 2 to 20;
- where R3 is --H, --OH, --OCH.sub.3, --OC.sub.2 H.sub.5, --OC.sub.3 H.sub.7, --OC.sub.4 H.sub.9, --OOCR5, (where RS is alkyl radical of 1 to 5 carbons), --NH.sub.2, --NH--CO--R5, and y is 0 or 1;
- and wherein the oxidizable galactose type of alcohol group containing polymer is selected from the group consisting of galactomannan gums or their ether derivatives, arabinogalactan gums or their ether derivatives, galactoglucomannan hemicelluloses or their ether derivatives and synthetically or enzymatically modified polymers selected from the group consisting of polysaccharides, polyacrylamides, polyacrylates polyamides, polyvinyl alcohol, and polyvinyl acetate, and wherein the lower limit of oxidizable galactose type of alcohol configuration containing polymer is about 50% based upon the weight of the composition.
Dependencies are inferred from the claim text.