Organic compounds -- part of the class 532-570 series – Organic compounds – Nitriles
Patent
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.
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Guglielmetti Leonardo
Meyer Hans R.
Reinehr Dieter
Weber Kurt
Ciba-Geigy Corporation
Dohmann George R.
Marquis Steven P.
McC. Roberts Edward
Niebling John
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