Aqualon Company

John D Angerer

Jashawant J Modi

Thomas G Majewicz

Makram H Meshreki

Robert C Szafranski

Hydroxyethylcellulose (HEC), hydrophobically modified hydroxyethylcellulose (HMHEC), hydroxypropylcellulose (HPC), methylhydroxypropylcellulose (MHPC), carboxymethylhydroxyethylcellulose (CMHEC), guar, starch, xanthan, hydroxypropylguar (HP Guar) or carboxymethylhydroxypropylguar (CMHP Guar) are stepwise or continuously reacted with hydrogen peroxide to produce aqueous compositions with a solids content greater than 5% by weight at a viscosity at 25.degree. C. below 9500 mPa.s. It is preferred to use 30 to 50% hydrogen peroxide to depolymerize the polysaccharide.

Process of preparing high solids low viscosity polysaccharides

A purified hydroxyethylcellulose (HEC) or hydroxypropylcellulose (HPC) reacts with a perfluorinated alkyl glycidyl ether to produce an associative thickener wherein a fluorinated C.sub.8 chain is nearly as effective as a hydrocarbyl C.sub.16 straight chain hydrophobe. A preferred glycidyl ether is prepared by reacting a terminal hydroxyl of a perfluorinated surfactant with epichlorohydrin.

Perfluorinated alkyl hydrophobe hydroxyalkylcellulose associative

An aqueous protective coating composition comprising (a) a nonionic, water-soluble 3-alkoxy-2-hydroxypropylhydroxyethylcellulose wherein the alkyl moiety is a straight or branched chain alkyl group having 6 to 24 carbon atoms and (b) a film forming latex, is disclosed.

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Hockessin, DE, United States of America

John D Angerer