| 摘要 |
1,217,623. Sulphobenzamido methyl-methacrylamide. FARBENFABRIKEN BAYER A.G. 29 Feb., 1968 [3 March, 1967; 24 Oct., 1967], No. 9787/68. Heading C2C. [Also in Division C3] The potassium salt of N-(p-sulphobenzamidomethyl) - methacrylamide is prepared by (a) treating the potassium salt of p-sulphobenzamide with formalin to effect methylolation of the amide group, and (b) reacting the product with methacrylamide in an aqueous solution containing acetic acid and hydrochloric acid in the presence of thiosemicarbazide stabilizer. The product is used in the preparation of dyeable acrylonitrile copolymers (see Division C3). |
