Low color, low sodium benzoxazinone UV absorbers and process for making same

The present invention relates to benzoxazinone compounds having a yellow index less than about 0, and a sodium concentration less than about 50 ppm. This invention also relates to a process for preparing these compounds comprising the step of reacting an isatoic anhydride with approximately stoichio...

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Bibliographische Detailangaben
1. Verfasser:	SARKAR, ASIM K
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS DYES HETEROCYCLIC COMPOUNDS HUMAN NECESSITIES HYGIENE MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE MEDICAL OR VETERINARY SCIENCE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS PAINTS POLISHES PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	The present invention relates to benzoxazinone compounds having a yellow index less than about 0, and a sodium concentration less than about 50 ppm. This invention also relates to a process for preparing these compounds comprising the step of reacting an isatoic anhydride with approximately stoichiometric amounts of an acylating compound, where the isatoic anhydride is purified by re-crystallization or other purification methods.