公开(公告)号：CA2201414C

公开(公告)日：2006-05-02

申请号：CA2201414

申请日：1997-04-01

Applicant: HOECHST AG

Inventor： URBAN MANFRED ,  BOHMER MARTIN ,  SCHNAITMANN DIETER

IPC: C09B48/00 ,  C09B67/20 ,  C09B67/10 ,  C09B67/22 ,  C09B67/52

Abstract: A process for preparing pigments, mixed crystal pigments and pigment preparations based on linear unsubstituted or substituted quinacridones of the formula (I ) (see formula I) in which the substituents R1 and R2 are identical or different and are hydrogen, chlorine, bromine or fluorine atoms or are C1-C4-alkyl, C1-C4-alkoxy or carboxamido groups which may be substituted by C1-C6-alkyl groups; or are phenoxy or C6- C10- aryl rings onto which further aromatic, aliphatic or heterocyclic rings can be fused, which process comprises hydrolyzing the reaction mixture resulting from cyclization of the respective dianilinoterephthalic acid with polyphosphoric acid or polyphosphate at a temperature of or above 110.degree.C with water or an aqueous mineral acid solution and then isolating the pigments thus obtained directly ; or subjecting the resulting prepigments, if desired after addition of organic solvents, to a finishing treatment and isolating the pigments; or subjecting the resultin g coarsely crystalline crude pigments to fine dispersion and then isolating the pigment s; or subjecting the prepigments obtained after fine dispersion, if desired after addition of solvents, to a finishing treatment and isolating the pigments. This gives quinacridone pigments having excellent coloristic and rheologic alproperties.

公开(公告)号：CZ9700984A3

公开(公告)日：1998-05-13

申请号：CZ98497

申请日：1997-04-01

Applicant: HOECHST AG

Inventor： URBAN MANFRED DIPL ING ,  SCHNAITMANN DIETER DR ,  BOHMER MARTIN

IPC: C09B67/20 ,  C09B48/00 ,  C09B67/52

CPC classification number: C09B48/00

公开(公告)号：CZ98497A3

公开(公告)日：1998-05-13

申请号：CZ98497

申请日：1997-04-01

Applicant: HOECHST AG

Inventor： URBAN MANFRED DIPL ING ,  SCHNAITMANN DIETER DR ,  BOHMER MARTIN

IPC: C09B67/20 ,  C09B48/00 ,  C09B67/10 ,  C09B67/22 ,  C09B67/52

Abstract: Preparation of pigments, mixed crystal pigments or pigment preparations based on linear, optionally substituted quinacridones of formula (I) is by hydrolysing a cyclisation reaction mixture of a dianilinoterephthalic acid of formula (IA) and a polyphosphoric acid (or ester) with water or an aqueous mineral acid solution at 110 degrees C or above and then, depending on the nature of the product (A) directly isolating the pigment; (B) subjecting the pre-pigment to a finishing treatment, optionally after adding an organic solvent, and then isolating it; (C) finely dividing the coarse crystalline crude pigment and then isolating it; or (D) subjecting the finely-divided pre-pigment to a finishing treatment, optionally after adding a solvent, and then isolating it. In the formulae, R , R = H, Cl, Br or F or 1-4C alkyl, 1-4C alkoxy, carbonamido (optionally substituted by 1-6C alkyl) or a phenoxy- or aryl-ring optionally substituted by further aromatic, aliphatic or heterocyclic rings.