| 摘要 |
1288070 Optical brighteners FARBWERKE HOECHST AG 11 Sept 1969 [13 Sept 1968] 44961/69 Heading DIP [Also in Division C2] Textile materials of cellulose (cotton) or synthetic polyamide fibres are optically brightened by treatment with a compound of the formula: where X<SP>+</SP> represents an ammonium ion derived from a primary, secondary, or tertiary aliphatic amine, under high temperature conditions. The ammonium ion may carry a water-solubilising group e.g. a hydroxy group while the fibres may be treated in an aqueous bath at 100 to 130‹C. |
