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专利名称：Process for the preparation of bis-styrylbenzenes
发明人：Leonardo Guglielmetti申请号：US06/474731申请日：19830318公开号：US04785128A公开日：19881115
摘要：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.1are identical or different and, if R and R.sub.1 are identical, R.sub.1 must occupy a positionin the phenyl ring to which it is bonded which differs from the position occupied by R in itsphenyl ring, and in which R and R.sub.1 independently of one another are CN or acarboxylic acid ester group, and 49-1% of a symmetrically substituted compound of theformula ##STR2## in which R is as defined above and the two R's are bonded to identicalpositions in their phenyl rings, as are also agents which contain these fluorescent
brighteners and the use of these fluorescent brighteners for the fluorescent brighteningof, in particular, textile materials, preferably made of polymer. The said fluorescentbrighteners are prepared by reacting terephthalaldehyde preferably with acorrespondingly substituted benzylphosphonate and further reacting the resultingmixture of a correspondingly substituted 4- stilbene aldehyde and a symmetrical p-bis-styrylbenzene with a benzylphosphonate which differs from the benzylphosphonate firstused.
申请人：CIBA-GEIGY CORPORATION
代理机构：Wenderoth, Lind & Ponack
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