| 摘要 |
Decrease in the brightening effect of optically brightened paper products.. F2A. Comprises addition of cpds. of formula: (where Y = C2-4 alkylene, R1 = H, halogen, nitro, aminosulphonyl or aliphatic, cycloaliphatic, aromatic or heterocyclic group connected to an aryl group through intermediary hetero atoms. R2 = H or aliphatic, cycloaliphatic, aromatic as heterocyclic groups) esp. where the optical brightness are stilbenes. Used for suppressing the optical brightening of textiles, plastics and, in particular, paper products. |
