β‐Aminoethoxyl‐ and β‐cyanoethoxylcellulose acetates

Mixed cellulose acetate‐ethers were prepared which contain basic‐type nitrogen groups whose films were dyed by xylene brilliant blue. β‐Aminoethoxylcellulose acetate was prepared from cellulose diacetate and yarn‐type cellulose acetate–propionate using ethyleneimine. β‐Cyanoethoxylcellulose acetate was prepared from β‐cyanoethoxylcellulose and from cellulose acetate using acrylonitrile with an organic base as catalyst. The solubilities of the mixed ether–esters containing basic type nitrogen groups were less than those of cellulose esters and ethers of comparable degrees of substitution.