Production of temporarily crosslinked cellulose ether which can be mixed in water without clumping and with delayed onset of swelling, involves reacting cellulose ether with an aldehydo-acid, e.g. glyoxylic acid

摘要

A method for the production of temporarily crosslinked cellulose ethers which can be stirred into aqueous solutions without forming lumps and with delayed onset of swelling, involves mixing cellulose ethers containing free hydroxyl groups (I) with compounds containing aldehyde group(s) and acid group(s) which are then reacted with the free OH groups.