PROCESSES FOR CROSS-LINKING CELLULOSE ETHERS UNDER MILD CONDITIONS

PROCESSES FOR CROSS-LINKING CELLULOSE ETHERS UNDER MILD CONDITIONS

The present technology provides processes for cross-linking cellulose ethers under mild conditions. The processes include exposing a substantially dry cellulose ether film to a polyisocyanate to provide a cross-linked cellulose ether film, wherein the substantially dry cellulose ether film comprises...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: KUNDU, PATIT PABAN, SINGH, RATAN PAL
Format: Patent
Sprache:eng ; fre
Schlagworte:
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
DERIVATIVES THEREOF
GENERAL PROCESSES OF COMPOUNDING
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
POLYSACCHARIDES
SEPARATION
THEIR PREPARATION OR CHEMICAL WORKING-UP
TRANSPORTING
WORKING-UP
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Beschreibung
Zusammenfassung:The present technology provides processes for cross-linking cellulose ethers under mild conditions. The processes include exposing a substantially dry cellulose ether film to a polyisocyanate to provide a cross-linked cellulose ether film, wherein the substantially dry cellulose ether film comprises alkoxide groups on the cellulose. The resulting cellulose ether films are highly cross-linked by polyurethane linkages and may be used as membranes in a variety of applications. La présente invention porte sur des procédés de réticulation d'éthers de cellulose dans des conditions douces. Les procédés comprennent l'exposition d'un film d'éther de cellulose sensiblement sec à un polyisocyanate pour obtenir un film d'éther de cellulose réticulé, le film d'éther de cellulose sensiblement sec comprenant des groupes alcoolate sur la cellulose. Les films d'éther de cellulose obtenus sont fortement réticulés par des liaisons polyuréthane et peuvent être utilisés en tant que membranes dans toute une gamme d'applications.