申请人:Ciba-Geigy Corporation
公开号:US04778622A1
公开(公告)日:1988-10-18
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(C.sub.1 -C.sub.4) alkylphosphonomethylbenzonitrile to cyano-4-formylstilbene, which is further condensed, either direct or after isolation, with at least one other di(C.sub.1 -C.sub.4)alkylphosphonomethylbenzonitrile, the use of these mixtures for whitening polyester fibres, and compositions containing said mixtures for whitening polyester fibres.
含有荧光增白剂混合物,其中51至99重量%为对称或非对称取代的第一种1,4-双(氰基苯乙烯基)苯,并且49至1重量%为与第一种不同的非对称取代的第二种1,4-双(氰基苯乙烯基)苯。制备该混合物的过程是通过将对苯二甲醛与一种二(C.sub.1-C.sub.4)烷基膦甲基苯腈缩合成氰基-4-甲酰亚苯乙烯,进一步直接缩合或在分离后与至少一种其他的二(C.sub.1-C.sub.4)烷基膦甲基苯腈缩合。这些混合物用于漂白聚酯纤维,并且包含该混合物的组合物用于漂白聚酯纤维。