Mit Hydroxy- und Alkingruppen und mit Hydroxyalkyl-, Alkin- und Azidgruppen substituierte Celluloseether, Verfahren zu deren Herstellung und deren Verwendung als wasserunlösliche Klebstoffe

Nicht-ionische, wasserlösliche Celluloseether mit Hydroxyalkylgruppen und ω-Alkinyl-Gruppen, die jeweils über eine Etherbindung mit der Cellulose verbunden sind, wobei der molare Substitutionsgrad MS(Alkin) im Bereich von 0,001 bis 0,30 liegen. Nonionic, water-soluble cellulose ethers are disclosed with hydroxyalkyl groups and ω-alkynyl groups, each joined to the cellulose via an ether bond, the degree of molar substitution MS(alkyne) being in the range from 0.001 to 0.30. The cellulose ethers may further contain azido groups, preferably 3-azido-2-hydroxypropyl groups, likewise joined to the cellulose by an ether bond, the MS(AHP) being in the range from 0.001 to 0.3. To obtain an adhesive, cellulose ether is mixed with water or. if the cellulose ether contains no alkyne groups, is mixed additionally with a non-ionic cellulose ether containing ω-alkyne groups and hydroxyalkyl groups, each bonded to the cellulose by ether bonds. The mixture is applied to at least one of the surfaces to be bonded and then is contacted with a copper(I) catalyst or a ruthenium catalyst. The adhesive is especially suitable for bonding wood, paper, cardboard or other cellulosic material.