| 摘要 |
1286741 Optical brighteners. BADISCHE ANILIN & SODA FABRIK AG 2 Jan 1970 [4 Jan 1969] 208/70 Heading D1P [Also in Division C2] Optical brighteners for synthetic and natural polyamides, cellulose esters and acrylonitrile polymer textile materials comprise pyrazolines of the formula in which R is hydrogen, Cl, Br, methyl, methoxy, ethoxy, acetylamino, methyl sulphonylamino or acetoxy, R' is hydrogen, Cl, Br, methyl, ethyl, -COOH or ester or amide thereof, CN, SO 3 H or ester or amide thereof or sulphonyl, R<SP>2</SP> is hydrogen, methyl or a carboxylic ester or amide, R<SP>3</SP> is hydrogen or methyl, Y is hydrogen or Cl and X is hydroxy, alkoxy, aralkoxy, aryloxy, amino or substituted amino group. Specified substrates are wool, silk, nylon, cellulose acetate and triacetate. Example 86 describes the brightening of an acrylonitrile polymer cloth in an aqueous bath. |
