Low color, low sodium benzoxazinone UV absorbers and process for making same
申请人:——
公开号:US20030096889A1
公开(公告)日:2003-05-22
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.
LOW COLOR, LOW SODIUM BENZOXAZINONE UV ABSORBERS AND PROCESS FOR MAKING SAME
申请人:Cytec Technology Corp.
公开号:EP1438352A1
公开(公告)日:2004-07-21
US3989698A
申请人:——
公开号:US3989698A
公开(公告)日:1976-11-02
US6774232B2
申请人:——
公开号:US6774232B2
公开(公告)日:2004-08-10
[EN] LOW COLOR, LOW SODIUM BENZOXAZINONE UV ABSORBERS AND PROCESS FOR MAKING SAME<br/>[FR] ABSORBEURS UV A BASE DE BENZOXAZINONE A FAIBLE TENEUR EN SODIUM ET A FAIBLE INDICE DE COLORATION ET PROCEDE DE FABRICATION DE CES ABSORBEURS
申请人:CYTEC TECH CORP
公开号:WO2003035735A1
公开(公告)日:2003-05-01
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 anydride with approximately stoichiometric amounts of an acylating compound, where the isatoic anhydride is purified by re-crystallization or other purification methods.