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公开(公告)号：DK171368B1
公开(公告)日：1996-09-30
申请号：DK668988
申请日：1988-11-30
Applicant: HOECHST AG
Inventor： RIEPER WOLFGANG
IPC: G03G9/09 , A61K8/18 , A61Q1/02 , B41M5/00 , C09B29/01 , C09B29/32 , C09B41/00 , C09B67/14 , C09B67/20 , C09B67/54 , D06P5/00
Abstract: The invention relates to monoazo pigments prepared from dichloroanilines as diazo components and CH-acidic coupling components of the acetoacetarylamide or naphthol series, these pigments only containing an extremely low level of polychlorinated biphenyls (PCBs) (at most 25 mu g per g of pigment). The process for preparing the pigments takes the form of an azo coupling in an aqueous medium, wherein a) azo coupling is effected by adding the diazonium salt solution to a suspension or solution of the coupling component or by simultaneously metering the aqueous suspensions or solutions of the diazonium salt and of the coupling component into the reaction mixture, b) azo coupling is effected at a pH or within a pH range of less than pH 7 and b1) between pH 4 and 7 during and after azo coupling less than 0.05 mol-%, b2) at pH 2 to 4 during azo coupling less than 5 mol-%, and b3) at pH
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公开(公告)号：ES2070359T3
公开(公告)日：1995-06-01
申请号：ES91106921
申请日：1991-04-29
Applicant: HOECHST AG
Inventor： RIEPER WOLFGANG
Abstract: The industrial preparation of C.I. Pigment Yellow 81 by conventional coupling methods has the disadvantage that traces of polychlorinated biphenyls are formed in the course of the reaction of the two components. The invention now provides that the addition of quaternary dialkyldiallylammonium compounds during the azo coupling will decisively suppress the PCB-forming secondary reactions during the pigment synthesis.
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公开(公告)号：ES2057574T3
公开(公告)日：1994-10-16
申请号：ES90909673
申请日：1990-06-16
Applicant: HOECHST AG
Inventor： RIEPER WOLFGANG
Abstract: PCT No. PCT/EP90/00955 Sec. 371 Date Feb. 21, 1992 Sec. 102(e) Date Feb. 21, 1992 PCT Filed Jun. 16, 1990 PCT Pub. No. WO90/15844 PCT Pub. Date Dec. 27, 1990.The production which is customary in practice of monoazo compounds based on dichloro- and trichloroanilines or disazo compounds of the chlorinated biphenyl series by conventional coupling methods meets with difficulties in that the resulting pigments are contaminated by traces of polychlorinated biphenyls. According to the invention, it has now been found that by addition of water-soluble olefins of the type (R =H, alk or Oalk; X =-COOR1, -CONHR2 or -NR3COR4) in the azo coupling, the side reactions which form PCBs can be decidedly suppressed during synthesis of the pigments.
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公开(公告)号：MX173135B
公开(公告)日：1994-02-02
申请号：MX1400288
申请日：1988-11-30
Applicant: HOECHST AG
Inventor： RIEPER WOLFGANG
IPC: G03G9/09 , A61K8/18 , A61Q1/02 , B41M5/00 , C09B29/01 , C09B29/32 , C09B41/00 , C09B67/14 , C09B67/20 , C09B67/54 , D06P5/00 , D01F1/04 , G03G9/08
Abstract: The invention relates to monoazo pigments prepared from dichloroanilines as diazo components and CH-acidic coupling components of the acetoacetarylamide or naphthol series, these pigments only containing an extremely low level of polychlorinated biphenyls (PCBs) (at most 25 mu g per g of pigment). The process for preparing the pigments takes the form of an azo coupling in an aqueous medium, wherein a) azo coupling is effected by adding the diazonium salt solution to a suspension or solution of the coupling component or by simultaneously metering the aqueous suspensions or solutions of the diazonium salt and of the coupling component into the reaction mixture, b) azo coupling is effected at a pH or within a pH range of less than pH 7 and b1) between pH 4 and 7 during and after azo coupling less than 0.05 mol-%, b2) at pH 2 to 4 during azo coupling less than 5 mol-%, and b3) at pH
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公开(公告)号：CA1310634C
公开(公告)日：1992-11-24
申请号：CA584516
申请日：1988-11-30
Applicant: HOECHST AG
Inventor： RIEPER WOLFGANG
IPC: G03G9/09 , A61K8/18 , A61Q1/02 , B41M5/00 , C09B29/01 , C09B29/32 , C09B41/00 , C09B67/14 , C09B67/20 , C09B67/54 , D06P5/00 , D06P1/04
Abstract: Monoazo pigments, process for preparation and use thereof The invention relates to monoazo pigments prepared from di- or trichloroanilines as diazo components and CH-aci-dic coupling components of the acetoacetarylamide or naphthol series, these pigments only containing an extremely low level of polychlorinated biphenyls (PCBs) (at most 25 .mu.g per g of pigment). The process for preparing the pigments takes the form of an azo coupling in an aqueous medium, wherein a) azo coupling is effected by adding the diazonium salt solution to a suspension or solution of the coupling component or by simultaneously metering the aqueous suspensions or solutions of the diazonium salt and of the coupling component into the reaction mixture, b) azo coupling is effected at a pH or uithin a pH range of less than pH 7 and b1) between pH 4 and 7 during and after azo coupling less than 0.05 mol-%, b2) at pH 2 to 4 during azo coupling less than 5 mol-%, and b3) at pH
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Patent Agency Ranking
公开(公告)号：BR8806332A
公开(公告)日：1989-08-15
申请号：BR8806332
申请日：1988-12-01
Applicant: HOECHST AG
Inventor： RIEPER WOLFGANG
IPC: G03G9/09 , A61K8/18 , A61Q1/02 , B41M5/00 , C09B29/01 , C09B29/32 , C09B41/00 , C09B67/14 , C09B67/20 , C09B67/54 , D06P5/00 , C09B29/00
Abstract: The invention relates to monoazo pigments prepared from dichloroanilines as diazo components and CH-acidic coupling components of the acetoacetarylamide or naphthol series, these pigments only containing an extremely low level of polychlorinated biphenyls (PCBs) (at most 25 mu g per g of pigment). The process for preparing the pigments takes the form of an azo coupling in an aqueous medium, wherein a) azo coupling is effected by adding the diazonium salt solution to a suspension or solution of the coupling component or by simultaneously metering the aqueous suspensions or solutions of the diazonium salt and of the coupling component into the reaction mixture, b) azo coupling is effected at a pH or within a pH range of less than pH 7 and b1) between pH 4 and 7 during and after azo coupling less than 0.05 mol-%, b2) at pH 2 to 4 during azo coupling less than 5 mol-%, and b3) at pH
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公开(公告)号：DK389086D0
公开(公告)日：1986-08-15
申请号：DK389086
申请日：1986-08-15
Applicant: HOECHST AG
Inventor： RIEPER WOLFGANG , HAFNER OTMAR
IPC: B05D7/24 , C08J3/22 , C08K5/22 , C08K5/23 , C08K9/04 , C08K9/08 , C08K9/10 , C09B67/00 , C09B67/08 , C09B67/10 , C09B67/20 , C09D7/00 , C09D7/12 , C09D17/00 , C09B
Abstract: Powdered azo pigments with improved rheological properties for use in paint systems on an alkyd/melamine, acrylic/melamine, acrylate/isocyanate or polyester/isocyanate basis, both of a conventional nature and also of a modern nature of the "high solids" type, to which-as appropriate before, during or after finishing-1 to 20% by weight of the active substance of a paint additive of the polyurethane series, prepared by reacting polyisocyanurates which still carry free isocyanate groups and are based on toluylene diisocyanate, hexamethylene diisocyanate or mixtures thereof, with (1) aliphatic mono- or polyhydroxycarbonylic acid C1-C20-alkyl esters (degree of polycondensation 2-50), (2) polyethylene glycols (molecular weight 500-1,500) and (3) 5- or 6-membered, saturated or unsaturated heterocyclic compounds which contain at least one nitrogen atom in the ring and reactive amino or hydroxy-C1-C6-alkyl groups, until isocyanate groups are no longer detectable, has/have been applied, a process for their preparation and their use for pigmenting paint systems.
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公开(公告)号：CA1027941A
公开(公告)日：1978-03-14
申请号：CA190476
申请日：1974-01-18
Applicant: HOECHST AG
Inventor： HUNGER KLAUS , RIBKA JOACHIM , WEINGARTEN FRIEDRICH , RIEPER WOLFGANG
Abstract: Process for the aftertreatment of the azo pigment of the formula C.I. PIGMENT ORANGE 36 wherein the crude pigment obtained after coupling is heated to temperatures from 100 DEG to 150 DEG C. in dry or wet condition in a solvent which is water-immiscible or not indefinitely water-miscible and the pigment is isolated in known manner. The pigment aftertreated in this way shows substantially improved hiding power while the same pigment prepared in the usual way has poor hiding power and can not be used in stoving lacquers.
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公开(公告)号：CA1027935A
公开(公告)日：1978-03-14
申请号：CA190484
申请日：1974-01-18
Applicant: HOECHST AG
Inventor： HUNGER KLAUS , RIBKA JOACHIM , RIEPER WOLFGANG
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.
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公开(公告)号：DK136079B
公开(公告)日：1977-08-08
申请号：DK410074
申请日：1974-07-31
Applicant: HOECHST AG
Inventor： KUNSTMANN WALTER , RIEPER WOLFGANG
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