Mixtures of fluorescent whitening agents

Details Mixtures of fluorescent whitening agents Mixtures of fluorescent whitening agents

1988-08-05

1990-01-02

Niebling, John F.

Compositions

Organic luminescent material containing compositions

Optical brightening compositions

25230121, 558373, C09K 1106

Patent

active

048911534

ABSTRACT:
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.

REFERENCES:
patent: 3294570 (1966-12-01), Pommer et al.
patent: 4330427 (1982-05-01), Martini et al.
patent: 4380514 (1983-04-01), Seybold
patent: 4464284 (1984-08-01), Seybold
Chemical Abstract 94, 158322g, (1981), Horst et al.

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