The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 23, 2001
Filed:
Mar. 02, 2000
Kim Steven Chamberlin, Kingsport, TN (US);
Eastman Chemical Company, Kingsport, TN (US);
Abstract
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.