| 摘要 |
<p>1,135,282. Dyeing cellulose acetate. SANDOZ Ltd. 11 Jan., 1966 [15 Jan., 1965], No. 1217/66. Heading B5B. [Also in Divisions B2 and C4] A solution of cellulose acetate in acetone and methanol containing the azo dye salt of Example 1 is stirred to effect partial evaporation of the solvent filtered through cotton and a cotton wool filter press and spun.</p> |
