| 摘要 |
1412049 Optical brighteners CIBA-GEIGY AG 18 Oct 1973 [10 Nov 1972] 48671/73 Headings C3P and C3R [Also in Division C2] Coumarin derivatives of formula wherein R 1 denotes hydrogen, chlorine or methyl, R 2 denotes hydrogen, halogen, alkyl, alkoxy or alkylsulphonyl each with 1 to 4 carbon atoms, R 3 denotes hydrogen, halogen or alkyl with 1 to 4 carbon atoms, R 4 denotes hydrogen, chlorine, methyl or methoxy, X 1 denotes = N- or = CH- and A denotes a radical of the formula wherein Y 1 represents hydrogen, alkyl with 1 to 4 carbon atoms, phenyl which is optionally substituted by chlorine, methyl or methoxy, or benzyl, Y 2 represents hydrogen, halogen, alkyl with 1 to 4 carbon atoms, phenyl which is optionally supstituted by chlorine, methyl or methoxy, or benzyl, Y 3 represents hydrogen, alkyl with 1 to 4 carbon atoms, phenyl which is optionally substituted by chlorine, methyl or methoxy, or benzyl, or two Y radicals in the ortho-position to one another together represent trimethylene or tetramethylene, Z 1 represents hydrogen, halogen, alkyl with 1 to 4 carbon atoms or phenyl which is optionally substituted by chlorine, methyl or methoxy, Z 2 represents hydrogen, alkyl with 1 to 4 carbon atoms, phenyl which is optionally substituted by chlorine, methyl or methoxy, styryl which is optionally substituted by chlorine, methyl or methoxy, nitrile, carboxy or carbalkoxy with 2 to 13 carbon atoms or Z 1 and Z 2 together represent trimethylene, tetramethylene, a fused benzene radical optionally containing 1 to 3 substituents from the series of chlorine, methyl and methoxy, a 1,2,3,4-tetrahydronaphthalene or naphthalene radical fused in the 1,2-position or an acenaphthene radical fused in the 4,5-position, are used as optical brighteners for polyesters, polyamides, polyvinyl chloride and polystyrene. |
