31.
    发明专利
    未知

    公开(公告)号:BR7704321A

    公开(公告)日:1978-04-04

    申请号:BR7704321

    申请日:1977-07-01

    Applicant: HOECHST AG

    Abstract: Mixtures of optical brighteners containing 0.05 to 1% of a 4-benzoxazolystilbene derivative and 1 to 0.05% of a 1,4-bis-benzoxazolyl- or bis-benzthiazolyl-naphthalene derivative. These mixtures show a higher degree of whiteness than an equal amount of only one of the two components.

    37.
    发明专利
    未知

    公开(公告)号:BR8101322A

    公开(公告)日:1981-09-08

    申请号:BR8101322

    申请日:1981-03-06

    Applicant: HOECHST AG

    Inventor: MARTINI T ROSCH G

    Abstract: Mixtures of optical brighteners consisting of (a) 1 to 99 weight % of one or several compounds of the formula 1 (1) (b) 99 to 1 weight % of one or several compounds of the formula 2 (2) wherein n is 0 or 1, X is oxygen or sulfur, B is a group of the formulae +TR and the other substituents are defined a specified in the description.

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