Alkyl hydroxyalkyl cellulose ethers containing sulfoalkyl substituents
AssigneeHoechst Aktiengesellschaft
InventorsUwe Bartz, Reinhard Donges, Heiner Klehr
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Abstract
The present invention relates to alkyl hydroxyalkyl cellulose ethers which contain a sulfoalkyl group as a further substituent, to a process for the preparation of these cellulose ethers and to building material mixtures which are based on gypsum, hydrated lime or cement and contain alkyl hydroxyalkyl cellulose ethers containing sulfoalkyl groups.
Claims8
An alkyl mono hydroxyalkyl cellulose ether, which contains a sulfoalkyl group as a further ether substituent and has an average degree of substitution (DS.sub.sulfoalkyl) from 0.004 to 0.077.
A cellulose ether containing repeating etherified anhydroglucose units and having a molecular weight of at least about 10,000, wherein, on average, more than one hydroxyl group per anhydroglucose unit has been etherified, and the ether groups on the cellulose molecule include an alkyl ether, a hydroxyalkyl ether, and a sulfoalkyl ether.
Dependencies are inferred from the claim text.