Cellulose ethers substituted with hydroxy and alkyne groups and with hydroxyalkyl, alkyne and azide groups and their use as water-insoluble adhesives

摘要

Disclosed are nonionic, water-soluble cellulose ethers with hydroxyalkyl groups and ω-alkynyl groups, which are each connected via an ether bond with the cellulose, wherein the molar degree of substitution MS (alkyne) is in the range of 0.001 to 0.30. In addition, the cellulose ethers may have azido groups, preferably 3-azido-2-hydroxypropyl groups, which are also linked to the cellulose via an ether bond, with the MS (AHP) ranging from 0.001 to 0.3. To obtain an adhesive, cellulose ether is mixed with water or, if the cellulose ether has no alkyne groups, additionally mixed with a non-ionic cellulose ether containing ω-alkyne groups and hydroxyalkyl groups each attached to the cellulose via ether linkages. The mixture is applied to at least one of the surfaces to be bonded and then contacted with a copper (I) or ruthenium catalyst. The adhesive is particularly suitable for bonding wood, paper, cardboard or other cellulosic material.