摘要 |
Mixtures of fluorescent whitening agents consisting of 51 to 99% by weight of a symmetrically or unsymmetrically substituted first 1,4-bis(cyanostyryl)benzene and 49 to 1% by weight of an unsymmetrically substituted second 1,4-bis(cyanostyryl)benzene that differs from the first, a process for the preparation of said mixtures by condensing terephthalaldehyde with a di(C1-C4) alkylphosphonomethylbenzonitrile to cyano-4-formylstilbene, which is further condensed, either direct or after isolation, with at least one other di(C1-C4)alkylphosphonomethylbenzonitrile, the use of these mixtures for whitening polyester fibres, and compositions containing said mixtures for whitening polyester fibres. |
申请人 |
CIBA-GEIGY AG, BASEL, CH |
发明人 |
GUGLIELMETTI, LEONARDO, DR., CH-4103 BOTTMINGEN, CH;MEYER, HANS RUDOLF, DR., CH-4102 BINNINGEN, CH;REINEHR, DIETER, DR., D-7842 KANDERN, DE;WEBER, KURT, DR., CH-4052 BASEL, CH |