Polymeric Azo Dyes Derived from 4- 4 -(4-dimethylamino-1-phenylazo) phenyl -1 2 4-triazolidine-3 5-dione and Diisocyanates

Polymeric Azo Dyes Derived from 4- 4 -(4-dimethylamino-1-phenylazo) phenyl -1 2 4-triazolidine-3 5-dione and Diisocyanates
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