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    51.
    发明专利
    未知

    公开(公告)号：DK143655C

    公开(公告)日：1982-03-01

    申请号：DK29774

    申请日：1974-01-18

    Applicant: HOECHST AG

    Inventor： HUNGER K ,  RIBKA J ,  RIEPER W

    IPC: C09D7/00 ,  C09B35/03 ,  C09B35/08 ,  C09B35/18 ,  C09B67/10 ,  C09D7/12 ,  C09B67/36

    Abstract: A highly covering disazo pigment having the chemical constitution WHICH IS CHARACTERIZED BY A SPECIFIC SURFACE OF 12 - 30, PREFERABLY 15 TO 25, M2/G, A MAXIMUM OF THE GRAIN SIZE DISTRIBUTION OF BETWEEN 250 AND 500 NM AND A PROPORTION OF THESE GRAIN SIZES IN THE TOTAL DISTRIBUTION OF 35 - 65 PERCENT, PREFERABLY 45 - 60 PERCENT. This new pigment form is obtained by heating the pigment obtained after coupling with a solvent which is immiscible with water or miscible with water to a limited degree only to temperatures above 100 DEG C.

    53.
    发明专利
    未知

    公开(公告)号：BR8003934A

    公开(公告)日：1981-01-13

    申请号：BR8003934

    申请日：1980-06-24

    Applicant: HOECHST AG

    Inventor： HUNGER K

    IPC: C08K5/34 ,  C09B29/20 ,  D06P1/18

    Abstract: When diazotizing lower alkyl esters of 3-nitro-4-aminobenzoic acid and coupling them onto 5-(2'-hydroxy-3'-naphthoylamino)-benzimidazolone-(2) which may be substituted in 6'-position by chlorine or bromine, in 1-position by methyl or ethyl and in the benzo-nucleus by chlorine, bromine, methyl, ethyl, methoxy or ethoxy, and such as further illustrated by a representative formula I wherein R is alkyl of 1 to 4 carbon atoms, X is hydrogen, chlorine, bromine, methyl, ethyl, methoxy or ethoxy, Y is hydrogen, methyl or ethyl, and Z is hydrogen, chlorine or bromine. Colorants are obtained which are especially useful for pigmenting plastics, spinning masses, printing inks, varnishes and paints. The dyeings obtained therewith are fast to light, weathering, solvents and migration, especially fast to overvarnishing and bleeding.

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