Mixtures of fluorescent whitening agents

Details Mixtures of fluorescent whitening agents Mixtures of fluorescent whitening agents

1990-09-07

1991-12-10

Niebling, John

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitriles

25230121, 25230122, 558411, C07C25500

Patent

active

050720163

ABSTRACT:
Mixtures of fluorescent whitening agents consisting of 51 to 99% by weight of 1-(4-cyanostyryl)-4-(3'-styryl)benzene, 49 to 1% by weight of 1-(4-cyanostyryl)-4-(2'-cyanostyryl)benzene and 0.5 to 5% by weight of 1,4-bis(cyanostyryl)benzene, a process for the preparation of said mixtures by condensing terephthalaldehyde with a 4-dialkylphosphonomethylbenzonitrile to 4-cyano-4'-formylstilbene, which is further condensed, either direct or after isolation, with a 3- and 2-dialkylphosphonomethylbenzonitrile, the use of these mixtures for whitening polyester fibres, and compositions containing said mixtures for whitening polyester fibres.

REFERENCES:
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patent: 4380514 (1983-04-01), Seybold
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patent: 4778622 (1988-10-01), Guglielmetti et al.
patent: 4778623 (1988-10-01), Guglielmetti et al.
patent: 4867906 (1989-09-01), Guglielmetti et al.
patent: 4891153 (1990-01-01), Guglielmetti et al.

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