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US 5,182,380 AGranted
Dihydroxypropyl sulphoethyl celluloses, their preparation and their use
AssigneeWolff Walsrode AG
InventorsJorn Breckwoldt, Klaus Szablikowski
Life of this patent
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Abstract
Water-soluble, reversibly gelable cellulose ethers containing sulphoethyl groups (DS-sulphoethyl) and dihydroxpropyl groups (MS-dihydroxypropyl).
Claims8
Water-soluble, reversibly gelable cellulose ethers having an average degree of substitution with sulphoethyl groups (DS-sulphoethyl) of from 0.05 to 0.4 and a molar degree of substitution with dihydroxypropyl groups (MS-dihydroxypropyl) of from 0.1 to 1.
Dependencies are inferred from the claim text.