Process for the manufacture of water-absorbing cellulose ethers

摘要

This invention relates to an improvement in the process for the manufacture of water-adsorbing but at least partially water-insoluble cellulose ethers in which cellulose is alkalized in a liquid reaction medium and reacted with an etherification agent in a manner such that an at least preponderantly water-soluble cellulose ether would be obtained in the case of a mere etherification process and in which, prior to, simultaneously with, or after the etherification process, a reaction is effected with a crosslinking agent which is polyfunctional towards cellulose in an alkaline reaction medium, THE IMPROVEMENT COMPRISING EMPLOYING BIS(ACRYLAMIDO)-ACETIC ACID AS THE CROSSLINKING AGENT.