MIXTURE OF OPTICAL BRIGHTENERS
    2.
    发明授权

    公开(公告)号:KR850000051B1

    公开(公告)日:1985-02-14

    申请号:KR790003139

    申请日:1979-09-12

    Applicant: HOECHST AG

    Abstract: Optical brighteners are prepared from 0.98-0.50 parts of a mixture prepared from 0.05-0.95 parts of compd. (I) and 0.95-0.05 parts of compd.(II), and 0.02-0.50 parts of compd. (III), where R1 = H or C1-C4 alkyl; R2 = H or C1-C4 alkyl in 6- or 7-position; A = -CN, - COOH, -COOCH3, -C6H5, or a nitrogen ring compd. containing R4 gp.; R4 = C1-C4 alkyl or β-hydroxy ethyl; and R3 = H or C1-C4 alkyl.

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