Fluorescent brighteners consisting of bis-styrylbenzene compound

Details Fluorescent brighteners consisting of bis-styrylbenzene compound Fluorescent brighteners consisting of bis-styrylbenzene compound

1985-07-18

1988-10-18

Niebling, John F.

Compositions

Organic luminescent material containing compositions

Optical brightening compositions

25230122, 558411, C09K 1106, C07C119048

Patent

active

047786230

ABSTRACT:
A fluorescent brightener is proposed which consists of 51-99% of an unsymmetrically substituted compound of the formula ##STR1## in which R and R.sub.1 are identical or different and, if R and R.sub.1 are identical, R.sub.1 must occupy a position in the phenyl ring to which it is bonded which differs from the position occupied by R in its phenyl ring, and in which R and R.sub.1 independently of one another are CN or a carboxylic acid ester group, and 49-1% of a symmetrically substituted compound of the formula ##STR2## in which R as defined above and the two R's are bonded to identical positions in their phenyl rings, as are also agents which contain these fluorescent brighteners and the use of these fluorescent brighteners for the fluorescent brightening of, in particular, textile materials, preferably made of polyester. The said fluorescent brighteners are prepared by reacting terephthalaldehyde preferably with a correspondingly substituted benzylphosphonate and further reacting the resulting mixture of a correspondingly substitued 4-stilbene aldehyde and a symmetrical p-bis-styrylbenzene with a benzylphosphonate which differs from the benzylphosphonate first used.

REFERENCES:
patent: 4330427 (1982-05-01), Martini et al.
patent: 4336155 (1982-06-01), Martini et al.

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