公开(公告)号：DE3030056A1

公开(公告)日：1982-03-25

申请号：DE3030056

申请日：1980-08-08

Applicant: BASF AG

Inventor： OSTERTAG WERNER DIPL CHEM DR ,  BITTLER KNUT DIPL CHEM DR ,  BOCK GUSTAV DIPL CHEM DR

IPC: C08K9/00 ,  C08K9/02 ,  C08L67/00 ,  C09C1/00 ,  C09C1/40 ,  C09C3/00 ,  C09C3/06 ,  C09D5/00 ,  C08K3/34 ,  C08K3/22 ,  C09D7/12 ,  C23C11/08

Abstract: Flaky mica pigments coated with metal oxides are prepared by oxidizing vaporizable metal carbonyls to metal oxides with oxygen at an elevated temperature in the presence of mica flakes which are kept in motion. The amount of carbonyls introduced into the reaction zone does not exceed 5% by volume of the amount of other gases introduced. The coated mica pigments are employed as pigments in surface coatings, plastics and glasses.

公开(公告)号：DE2703282A1

公开(公告)日：1978-08-10

申请号：DE2703282

申请日：1977-01-27

Applicant: BASF AG

Inventor： KIENER VOLKER DIPL CHEM DR ,  AUTZEN HORST DIPL CHEM DR ,  KOESTER HARTWIG DIPL CHEM DR ,  WUNSCH GERD DIPL CHEM DR ,  OSTERTAG WERNER DIPL CHEM DR ,  SCHREINER SIEGFRIED DIPL CHEM ,  VOELKL ERFRIED DIPL CHEM DR ,  HETZEL ECKARD DIPL CHEM

IPC: C01B17/66

Abstract: Anhydrous sodium dithionite is prepd. by the action of SO2 on NaOOCH in excess and NaOH in a reaction medium formed of H2O and an organic solvent. Methyl formate is also added to the reaction mixt. in a proportion which is =15 wt. % w.r.t. the organic solvent, and pref. when the reaction mixt. contains >=66% of the theoretical amt. of SO2 to be used. The molar proportions of NaOH and SO2 do not exceed the ratio 1:2. The process gives increased yields of a purer and more stable sodium dithionite, with a better granules size distribution. Pref. the initial reaction mixt. contains all the NaOH required in the form of an aq. soln., possibly contg. a part of the NaOOCH and/or the SO2. The remaining NaOOCH and SO2, as well as the cH3OOCH, are then added to this initial reaction mixt.

公开(公告)号：DE2438156A1

公开(公告)日：1976-02-19

申请号：DE2438156

申请日：1974-08-08

Applicant: BASF AG

Inventor： BOCK GUSTAV DIPL CHEM DR ,  WUNSCH GERD DIPL CHEM DR ,  OSTERTAG WERNER DIPL CHEM DR

IPC: C09C1/34

Abstract: The prodn. of transparent Cr(III) oxide green pigment comprises reacting CrO2Cl2 and/or an organic Cr salt dissolved in an organic solvent and a volatile Si cpd., pref. SiCl4, in the finely-dispersed state and with intimate mixing in the presence of water vapour and/or O2 in a reaction zone at >800 degrees C and sepn. of the resultant pigment. The Cr/Si atomic ratio in the reactants pref. is 1:1-5. Reaction can take place at =2300 degrees C and pref. takes place in hydrocarbon or flame. Used as pigment in automobile lacquers with metallic effect, for colouring thermoplastics or for wood lacquers. The pigment is both temp. stable and transparent.

公开(公告)号：DE2355840A1

公开(公告)日：1975-05-22

申请号：DE2355840

申请日：1973-11-08

Applicant: BASF AG

Inventor： MARX MATTHIAS DIPL CHEM DR ,  HARTMANN JOB-WERNER DIPL CHEM ,  OSTERTAG WERNER DIPL CHEM DR

IPC: C09D5/23 ,  G11B5/702 ,  G11B5/68

Abstract: A process for the manufacture of improved magnetic discs by applying a thin layer of a fluid dispersion of magnetic pigments and optional non-magnetic pigments in a binder mixture to a non-magnetic rigid base and curing the magnetic layer which has been applied. The binder consists essentially of from 60 to 90 percent by weight of a solid curable polycondensate of 2,2-bis-(4-hydroxyphenyl)-propane and epichlorohydrin having an epoxide equivalent weight of approximately 400 to 5,000, from 5 to 25 percent by weight of a curable allyloxybenzene-formaldehyde condensate of the resol type with free or alcohol-etherified methylol groups and a molecular weight of less thah 1,000, and from 5 to 30 percent by weight of a curable melamine-formaldehyde condensate with more than two alcohol-etherified methylol groups and a molecular weight of less than 3,000, from 10 to 35 percent by weight of the above epoxy resin being replaced by a reaction product of an epoxy group-containing polycondensate of 2,2-bis-(4-hydroxyphenyl)-propane and epichlorohydrin with the N-methylolamide of a copolymerizable olefinically unsaturated carboxylic acid of 3 to 5 carbon atoms. The magnetic layers thus produced adhere firmly to the base, can be readily ground and polished and are particularly resistant to wear when the magnetic discs are in use.

公开(公告)号：DE3201457A1

公开(公告)日：1983-07-28

申请号：DE3201457

申请日：1982-01-19

Applicant: BASF AG

Inventor： REICH HANS HEINER DIPL CHEM DR ,  BITTLER KNUT DIPL CHEM DR ,  OSTERTAG WERNER DIPL CHEM DR ,  ERTL GERT DIPL CHEM DR

IPC: B01J23/00 ,  B01J29/00 ,  C07B61/00 ,  C07C1/00 ,  C07C1/04 ,  C07C4/04 ,  C07C11/02 ,  C07C67/00 ,  C10G9/00 ,  C07C11/167

公开(公告)号：DE3209469A1

公开(公告)日：1982-09-30

申请号：DE3209469

申请日：1982-03-16

Applicant: BASF AG

Inventor： WIENAND HENNING DIPL CHEM DR ,  OSTERTAG WERNER DIPL CHEM DR ,  BITTLER KNUT DIPL CHEM DR ,  BUECHER DIETMAR DIPL CHEM DR ,  BAUER ROLAND ,  GAEDCKE HARALD DIPL CHEM DR

IPC: A23L1/275 ,  A61K47/02 ,  A61K47/04 ,  C09C1/24 ,  A61K7/021 ,  A61K47/00

Abstract: Iron oxide black pigments having improved acid resistance are obtained by treating them in aqueous suspension for 30 minutes to 200 hours at pHs from 0.5 to 14 and temperatures from 20 to 100 DEG C. The pigments aftertreated in this way are suitable for the colouring of cosmetics, pharmaceuticals and foodstuffs.

公开(公告)号：DE2847687A1

公开(公告)日：1980-05-22

申请号：DE2847687

申请日：1978-11-03

Applicant: BASF AG

Inventor： BITTLER KNUT DIPL CHEM DR ,  KIENER VOLKER DIPL CHEM DR ,  OSTERTAG WERNER DIPL CHEM DR ,  REBAFKA WALTER DIPL CHEM DR ,  REICH HANS HEINER DIPL CHEM DR ,  SCHREINER SIEGFRIED DIPL CHEM ,  TREPTOW WOLFRAM DIPL CHEM DR ,  VOELKL ERFRIED DIPL CHEM DR

IPC: C01B17/66

Abstract: A dithionite, partic. Na dithionite, is stabilised by addn. of a combination of (a) a metallic soap of oleic acid and/or its sarcoside and/or an invert soap; (b) a 4-6C dicarboxylic acid and/or a fatty alcohol ether-sulphate of formula R'-O-CH2-CH2-O-CH2-CH2-O-SO3H (where R1 is a 12-14C hydrocarbyl). The dithionite is used e.g. in vat dyeing and in the paper industry. The stabilised dithionite is very stable w.r.t. humidity and air, is practically free from dust, and has excellent flow characteristics. It dissolves completely in water.

公开(公告)号：DE2748935A1

公开(公告)日：1979-05-03

申请号：DE2748935

申请日：1977-11-02

Applicant: BASF AG

Inventor： OSTERTAG WERNER DIPL CHEM DR ,  ERTL GERT DIPL CHEM DR ,  WUNSCH GERD DIPL CHEM DR ,  KIENER VOLKER DIPL CHEM DR ,  VOELKL ERFRIED DIPL CHEM DR ,  SCHREINER SIEGFRIED DIPL CHEM

IPC: C01B17/66

Abstract: Prodn. of Na dithionite (I) comprises adding to a suspension of Na2S2O5.HCOONa (II) in a mixt. of water and alcohol (is not >50 wt.% water) a source of protons to give pH is not 4.1. Pref. the medium contains methanol and 10-20 wt.% water, and the acid in H2SO3 generated by passing SO2 through the suspension. Esp. 1-6 wt. pts. solvent are used per pt. (II). By keeping pH >=4.1 side reactions, esp. those leading to thiosulphate, are suppressed and yields of (I) improved.

公开(公告)号：DE2619084A1

公开(公告)日：1977-12-01

申请号：DE2619084

申请日：1976-05-03

Applicant: BASF AG

Inventor： OSTERTAG WERNER DIPL CHEM DR ,  EBENHOECH FRANZ LUDWIG DIPL CH ,  WUNSCH GERD DIPL CHEM DR ,  VOELKL ERFRIED DIPL CHEM DR ,  MADER THEODOR DIPL ING

IPC: B01D45/16 ,  B01D45/06

Abstract: Finely divided metal oxides produced by combustion of metal carbonyls are separated from the stream of gas by filtration. Before filtration, the stream of gas is subjected to a permanent change of direction in a tubular zone. This change of direction must be sufficient to cause a centrifugal acceleration which is from at least 1,000 to 10,000 times the acceleration due to gravity.