Mixtures of fluorescent whitening agents

Details Mixtures of fluorescent whitening agents Mixtures of fluorescent whitening agents

D - Textiles, Paper

06

L

8/52

D06L 3/12 (2006.01)

Patent

CA 1340088

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(C1-C4) alkyl-phosphonomethylbenzonitrile to cyano-4-formylstilbene, which is further condensed, either direct or aftqr isolation, with at least one other di(Cl-C4)alkylphosphonomethylbenzonitrile, the use of these mixtures for whitening polyester fibres, and compositions containing said mixtures for whitening polyester fibres.

532408

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