Compositions – Organic luminescent material containing compositions – Optical brightening compositions
Patent
1987-03-12
1988-10-18
Niebling, John F.
Compositions
Organic luminescent material containing compositions
Optical brightening compositions
25230122, 558411, C09K 1106
Patent
active
047786221
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.
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Guglielmetti Leonardo
Meyer Hans R.
Reinehr Dieter
Weber Kurt
Ciba-Geigy Corporation
Findlay Meredith C.
Marquis Steven P.
McC. Roberts Edward
Niebling John F.
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