99.
    发明专利
    未知

    公开(公告)号:DE3342040A1

    公开(公告)日:1985-05-30

    申请号:DE3342040

    申请日:1983-11-22

    Applicant: BASF AG

    Abstract: Compounds of the general formula I I where R1 and R2 independently of one another are each C6-C24-alkyl or are each benzyl which is unsubstituted or substituted by alkyl or by cycloalkyl, and one of the radicals may furthermore be hydrogen, and the rings A, B, C and D can be further substituted by chlorine, methyl or methoxy, with the exception of the compound of the formula +TR are useful as dyes in electrooptical liquid crystal displays or for the production of polarization films.

Patent Agency Ranking