公开(公告)号：DE58906751D1

公开(公告)日：1994-03-03

申请号：DE58906751

申请日：1989-09-16

Applicant: HOECHST AG

Inventor： DIETZ ERWIN DR ,  SCHIESSLER SIEGFRIED DR ,  URBAN MANFRED

IPC: C09B67/20 ,  C08K5/34 ,  C08K5/3442 ,  C08K5/3447 ,  C08K9/04 ,  C09B57/12 ,  C09B67/22 ,  C09D7/00 ,  C09D7/12 ,  C09D11/02 ,  D01F1/04

公开(公告)号：DE3734385A1

公开(公告)日：1989-04-20

申请号：DE3734385

申请日：1987-10-10

Applicant: HOECHST AG

Inventor： DIETZ ERWIN DR ,  SCHIESSLER SIEGFRIED DR

IPC: C08J3/20 ,  C08K5/34 ,  C08K5/3447 ,  C08L23/00

Abstract: The alpha -modification of cis-naphthoylenebis(benzimidazole) is unstable in many media and up to date has therefore only been used as a vat dye. However, according to the invention, the alpha -modification can readily be used for pigmenting in the mass polyolefins such as polyethylene, polypropylene or analogous copolymers. During pigmenting, the pigment which is prepared in a conventional manner, is stable in that modification and produces strong red dyeings.

公开(公告)号：DE4040468A1

公开(公告)日：1991-07-04

申请号：DE4040468

申请日：1990-12-17

Applicant: HOECHST AG

Inventor： MACHOLDT HANS-TOBIAS DR ,  SCHIESSLER SIEGFRIED DR ,  GITZEL JOERG DR ,  DIETZ ERWIN DR

IPC: C07C233/36 ,  C07C233/38 ,  C07C233/62 ,  C07C233/78 ,  C07C235/10 ,  C07D209/48 ,  C07D241/08 ,  C07D295/13 ,  C07D471/06 ,  C07D487/04 ,  C09D5/03 ,  C09D5/46 ,  G03F3/10 ,  G03G9/097

Abstract: Charge transfer agents for toners and developers used in electrophotographic copying and printing of data stored in an electronic, optical or magnetic system or in colour proofing and charge control agents for powder and powder paints are bis-cationic acid amide and imide derivs. of formula (I), (II) and/or (III): R1-8 independently = H or a hydrocarbon gp., opt. contg. a hetero-atom; KR1R2 and K'R4R5 may = a ring system; if R1R2, R4 or R5 is connected to K or K' by a double bond, R3 or R6 is absent and/or one of R1-3 with R7 or R4-6 with or R8 = a 2-5C aliphatic bridge; A, A' and W1 = divalent, W2 = a tetravalent and W3 = a trivalent bridge based on a hydrocarbon, opt. contg. hetero-atoms, and W1 may also = a direct bond; K and K' independently = N, P, As or Sb; X(-) the stoichiometric equiv. of (in)organic or (un)mixed anion(s). USE/ADVANTAGE - (I), (II) and (III) are colourless. The claims include their use in powders and paints for coating metals, wood, plastics, glass, ceramics, cement concrete, textiles, paper or rubber, esp. in triboelectric or electrokinetic spray powder paints. They have high and constant charge control properties, excellent temp. stability and very good dispersibility. They can be synthesised more economically than the usual charge control agents.

公开(公告)号：DE3931052A1

公开(公告)日：1990-03-22

申请号：DE3931052

申请日：1989-09-16

Applicant: HOECHST AG

Inventor： DIETZ ERWIN DR ,  SCHIESSLER SIEGFRIED DR ,  URBAN MANFRED DIPL ING

IPC: C09B57/12 ,  C09B67/22 ,  C09K23/32

Abstract: Pigment prepn. contains organic pigments (I) and basic additives, which are 1,3,6-trioxo- 1,3,6-trihydro- benzimidazo(2,1-b)benzo (1mn)(3,8)phenanthrolin-2-yl cpds. of formula (Q-A)xY (II), where Q = a gp. of formula (III), R1 = halogen, 1-4C alkyl, 1-4C alkoxy or CN; R2 = halogen; m and n = 0, 1, 2, 3 or 4; A = a chemical bond or a divalent -(CH2)p-, -CR3R4-, arylene, -S-, -O-or -NR5- gp. or a combination of these; p = 1-12; R3 and R5 = H or 1-6C alkyl; R4 = 1-6C alkyl; Y = a tert. N atom, -NR6R7, =NR8 or a satd. or unsatd. heterocyclic gp. and contains at least one tert. N atom; R6-8 = 1-20C alk(en)yl (opt. with hetero-atoms in the chain and/or terminal OH, prim. amino or acylamino gps.), a 5-6C cycloaliphatic or araliphatic gp. or an alkylene-heteroaryl gp.; x = 1-6. USE/ADVANTAGE - The prepn. is claimed for pigmenting high mol. organic materials and lacquer systems. It has much better dispersibility, flocculation stability, rheology, gloss and strength of colour than usual and is useful in plastic compsns., melts, spinning solns., lacquers, paints and printing inks.

公开(公告)号：DE2423539A1

公开(公告)日：1975-11-20

申请号：DE2423539

申请日：1974-05-15

Applicant: HOECHST AG

Inventor： PLESSEN HELMOLD VON DR ,  SCHIESSLER SIEGFRIED DR

IPC: C01B17/90

公开(公告)号：CH438535A

公开(公告)日：1967-06-30

申请号：CH1008262

申请日：1962-08-24

Applicant: HOECHST AG

Inventor： KUEHNE RUDOLF DR ,  MEININGER FRITZ DR ,  NOLL WALTER DR ,  RINNO HELMUT DR ,  SCHIESSLER SIEGFRIED DR

IPC: C09B62/535 ,  C09B45/04

公开(公告)号：DE58906443D1

公开(公告)日：1994-01-27

申请号：DE58906443

申请日：1989-10-24

Applicant: HOECHST AG

Inventor： DIETZ ERWIN DR ,  KAPAUN GUSTAV DR ,  SCHIESSLER SIEGFRIED DR

IPC: C09B57/12

Abstract: In the context of the conventional condensation of naphthalene- 1,4,5,8-tetracarboxylic acid with 1,2-diaminobenzene, the napthoylene- bis-benzimidazole isomers formed are obtained together in the cis and transform. In practice, there was the object of shifting the isomer ratio of the mixture obtained, i.e. of increasing the yield of the desired trans product and of reducing the yield of the cis product. At the same time, there was the necessity to develop a preparation process which optimised the yield and improved the waste water situation. This object is achieved according to the invention in that the starting compounds are subjected to a precondensation at 60 DEG to 110 DEG C in aqueous medium using virtually stoichiometric initial amounts and the condensation is then completed in a second step at 130 DEG to 180 DEG C.

公开(公告)号：DE3836674A1

公开(公告)日：1990-05-03

申请号：DE3836674

申请日：1988-10-28

Applicant: HOECHST AG

Inventor： DIETZ ERWIN DR ,  KAPAUN GUSTAV DR ,  SCHIESSLER SIEGFRIED DR

IPC: C09B57/12

Abstract: In the context of the conventional condensation of naphthalene- 1,4,5,8-tetracarboxylic acid with 1,2-diaminobenzene, the napthoylene- bis-benzimidazole isomers formed are obtained together in the cis and transform. In practice, there was the object of shifting the isomer ratio of the mixture obtained, i.e. of increasing the yield of the desired trans product and of reducing the yield of the cis product. At the same time, there was the necessity to develop a preparation process which optimised the yield and improved the waste water situation. This object is achieved according to the invention in that the starting compounds are subjected to a precondensation at 60 DEG to 110 DEG C in aqueous medium using virtually stoichiometric initial amounts and the condensation is then completed in a second step at 130 DEG to 180 DEG C.

公开(公告)号：DE3662784D1

公开(公告)日：1989-05-18

申请号：DE3662784

申请日：1986-09-02

Applicant: HOECHST AG

Inventor： SCHIESSLER SIEGFRIED DR ,  SPIETSCHKA ERNST DR

IPC: C07C17/10 ,  C07C17/00 ,  C07C17/12 ,  C07C25/22 ,  C07C67/00

Abstract: Process for preparing 1,3,6,8-tetrabromopyrene by brominating pyrene in aqueous suspension with simultaneous reoxidation of the resulting hydrogen bromide to bromine by means of an oxidizing agent, which comprises reacting pyrene in a highly concentrated aqueous suspension having a pyrene-water weight ratio of 1:1.2 to 2 with bromine at temperatures of 40 DEG to 65 DEG C. with simultaneous reoxidation of the resulting hydrogen bromide to bromine using an oxidizing agent, completing the bromination by heating the reaction mixture to temperatures of 70 DEG to 130 DEG C., reducing excess bromine with a reducing agent to hydrogen bromide and subjecting the 1,3,6,8-tetrabromopyrene formed, preferably without intermediate isolation, to an alkaline aftertreatment at temperatures of 40 DEG to 100 DEG C. within the pH range 8.5 to 12.

公开(公告)号：DE2449425A1

公开(公告)日：1976-04-29

申请号：DE2449425

申请日：1974-10-17

Applicant: HOECHST AG

Inventor： PLESSEN HELMOLD VON DR ,  SCHIESSLER SIEGFRIED DR

IPC: C01B17/90 ,  C01B17/92

Abstract: Regeneration of spent H2SO4 (pref. 70-90%) contg. organic impurities and/or (NH4)2SO4 in a Pauling's appts. into which the spent acid is fed through the dephlegmator is improved in that an oxidising agent is fed into the vat th rough an immersed tube. The oxidising agent is pref. a cpd. of tri- or penta- valent nitrogen (e.g. HNO3 or nitrosyl sulphuric acid) or Caro acid. Introduction of the oxidising agent under the surface of the boiling acid prevents losses occuring in the conventional process when the oxidising agent is introduced into the dephlagmator together with the impure acid (as it is partly carried away by the vapour stream). The presence of nitrogen cpds. in the bulk of the acid suppresses corrosion of the vat which is pref. made from grey cast iron.