Heterocyclic cpds. contg. ethylenic double bonds - used as optical brighteners for synthetic or natural textiles, pref. aromatic polyesters

摘要

Cpds. used for optically brightening organic textiles are of formula (I) (where b is H or Me; gamma is diphenylyl-4-. 1- or 2-naphthyl and delta may be any one of in these gps. d is H or Ph; e and f are Ph, stilbenyl, p-phenyl-stilbenyl or benzostilbenyl; Y2 is bridging member -O-, -S- or -N(X)a- and Xa is H or a 1-20C contg. gp. free from chromophoric gps. or substits. U5 is H, styryl or p-phenyl-styryl; and E is the completion of a benzene ring condensed onto the benzoxazole ring system, and terminal benzene and naphthalene gps. opt. contain non-chromophoric substits). (i) are for (i) synthetic, semi-synthetic and natural textiles, partic. fabrics pref. of aromatic polyester fibres and (ii) are useful as wash bath additives.