Verfahren zum Behandeln von in Wasser quellbaren Cellulosetextilfasern

A process for treating water swellable cellulosic materials, or mixtures or blends thereof with synthetic materials, with preformed agents selected from flame retarding agents, biocides, ultraviolet light absorbing agents, fluorescent brighteners and water proofing agents to provide treated materials which are fast to aqueous washing and drycleaning, said process comprising contacting said cellulosic material in any sequence with water in an amount sufficient to swell the cellulose, at least an effective amount of a preformed treating agent of low water solubility and of the aforesaid type, and a solvent for said treating agent, said solvent being an ethylene glycol or a polyethylene glycol, e.g., diethylene glycol monomethyl ether; being at least partially miscible with water; having a boiling point above about 150 DEG C. at atmospheric pressure; and being present in an amount sufficient to maintain swelling of the cellulose if the water is removed, provided that at some stage during the process the interior of the swollen cellulose is contacted with a solution of the treating agent in aqueous solvent or solvent.