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    Readily dispersible pigment form with high colouring strength - prepd. by grinding crude copper phthalocyanine and heating in organic solvent
    12.
    发明专利
    Readily dispersible pigment form with high colouring strength - prepd. by grinding crude copper phthalocyanine and heating in organic solvent 未知

    公开(公告)号：DE2933896A1

    公开(公告)日：1981-03-12

    申请号：DE2933896

    申请日：1979-08-22

    Applicant: BASF AG

    Inventor： ROTH KARL ,  SAPPOK REINHARD DIPL CHEM DR ,  BELDE HORST ,  DAUBACH EWALD DIPL CHEM DR

    IPC: C09B67/12 ,  C09B67/00 ,  C09B1/00

    Abstract: Copper phthalocyanine (CuPc) was converted to a form suitable for colouring use by grinding the crude prod. until it consisted of agglomerates composed of particles whose mean size was 0.05 microns or less, suspending the ground material in the 0.8-10 fold (pref. 2-8 fold) amt. by wt. of an organic solvent (1), and heating to 20-180 deg.C (pref. 50-150 deg.C) until the desired colouring strength was attained. Crude CuPc-prepd. e.g. by fusing a mixt. of o-phthalodinitrile and CuCl in anhyd. Na2SO4, and freed from salt by H2O treatment prior to grinding (10-40 hours in a ball mill, pref. 25-35 hours) - has a chlorine content of 2-4 wt.%. (1) may be amino-2-8C-alkanols (pref. 3-aminopropanol), mono- or bi-nuclear 6-membered aromatic nitrogen heterocycles (pref. pyridine), N,N-di(1-8C alkyl) amides of 1-3C carboxylic acids, N-methyl(or cyclohexyl)pyrrolid-2-one, or mixts. of these solvents. Depending on the organic solvent used, the pigment form was isolated from the mixt. either by direct filtration at 80-120 deg.C (or after treatment with H2O or aq. mineral acid) or by first removing the solvent by steam distn. and then filtering the resulting aq. suspension. The CuPc pigment forms have excellent dispersibility and high colouring strength.

    13.
    发明专利
    未知

    公开(公告)号：DE4113318A1

    公开(公告)日：1992-10-29

    申请号：DE4113318

    申请日：1991-04-24

    Applicant: BASF AG

    Inventor： ROTH KARL

    IPC: B01J2/00 ,  B01J2/04 ,  B01J2/10 ,  C09B67/00 ,  C09B67/08 ,  C09B67/20 ,  C09C3/04

    Abstract: Preparation of easily dispersible pigment granules, by dispersing in an aqueous suspension of the pigment with intensive stirring a gas which does not react with the suspension in the form of fine bubbles in an essentially pressureless manner, and converting the pigment suspension thus obtained into the pigment granules by spray-drying or by mechanical removal of the liquid, shaping of the still-moist pigment cake and subsequent drying.

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