benzoxazolyl - phenyl - stilbene useful for the optical brightness of organic materials, natural and synthetic

摘要

P benzoxazolyl - phenyl - stilbene of formula: & br / (see appended drawing in bopi) & br / in which x is the carboxyl group, its esters, amides, an ester group phenyl sulfonic acid or sulfamoyl, the cyano group or alkylsulfonyl and the core can be substituted by alkyl groups having 1 to 4atomes of carbon, phenyl, by chlorine atoms, the alkoxy groups containing 1 to 4atomes of carbon, phenoxy, cyano, alkylsulfonyl comprising 1 to 4atomes of carbon, phenylsulfonyl or alkoxycarbonyl group comprising 2 to 6 carbon atoms and their method of preparation. / p & & p & these compounds are used for the optical brightness of the polyvinyl chloride, polyesters, polyamides. / p