| 摘要 |
Disclosed is a process for the preparation of a mixture of benzoxazolyl-stilbene compounds by the reaction of unsubstituted 4,4'-bis(benzoxazol-2-yl)stilbene with a substituted o-aminophenol or o-aminonaphthol to obtain a mixture comprising the unsubstituted 4,4'-bis(benzoxazol-2-yl)stilbene and at least one substituted 4,4'-bis(benzoxazol-2-yl)stilbene, 4-naphthoxazol-2-yl-4'-benzoxazol-2-ylstilbene and/or 4,4'-bis(naphthoxazol-2-yl)stilbene. These mixtures are useful as fluorescent brightening agents and light stabilizers for synthetic polymeric materials such as polyesters, polyamide and polyolefin textile materials and shaped articles.
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