Alkylbenzoaxazo lystilbene derivs - used as optical brighteners for polymer matrices

摘要

Title derivs. are of formula (I): where B is a residue of formulae (II) or (III) : where X1 is H or 1-4 C alkyl, and n is 0 or 1. Prodts. are suitable for use with synthetic org. polymsn., polycondensn. or polyaddn. prodts., esp. polyesters.