Abstract
After the method reported by Allewelt and Watt, the formation reaction of cellulose phenyl thiourethane from viscose and zinc cellulose xanthate was investigated.
The results obtained are as follows: (1) Provided porous zinc cellulose xanthate is prepared homogeneously throughout the gel structure, cellulose phenyl thiourethane (CPTU) can be prepared even when excess free zinc ion is present.
(2) The reaction of zine cellulose xanthate with aniline accompanies side reactions which proceed simultaneously.
In order to accelerate the main reaction, it is appropriate to prepare the thiourethane at low temperature using low substituted xanthate.
