公开(公告)号：DE3770430D1

公开(公告)日：1991-07-04

申请号：DE3770430

申请日：1987-12-09

Applicant: BASF AG

Inventor： WIENAND HENNING DR ,  OSTERTAG WERNER DR ,  SCHWIDETZKY CHRISTOPH DR ,  KNITTEL HELMUT DR

IPC: C08K9/04 ,  C09C1/00 ,  C09C3/00 ,  C09C3/06 ,  C09C3/12 ,  C09D7/12

Abstract: Thermostable bismuth vanadate/molybdate pigments are prepared by precipitating onto a pigment, obtained by calcination, of the formula Bi VO4.Bi2Mo O6 where n is 0.2-2.5, in aqueous suspension at 70 DEG -100 DEG C. within the pH range from 4 to 9.5 a first SiO2-containing layer using an alkali metal silicate solution of a magnesium hexafluorosilicate solution, maintaining the suspension at 70 DEG -100 DEG C. for not less than 1 hour, producing a thick coating on the precoated pigment by adding further alkali metal silicate solution, magnesium hexafluorosilicate solution or a mixture of the two within the pH range from 4 to 9.5, and finally depositing wax on the SiO2-containing layer by means of a waxing emulsion/dispersion, the products showing, compared with the starting pigment, an appreciably improved thermal stability in plastics.

公开(公告)号：DE3206663A1

公开(公告)日：1983-09-01

申请号：DE3206663

申请日：1982-02-25

Applicant: BASF AG

Inventor： HABERMANN WOLFGANG ,  HAMMES PETER DR ,  FELGER JOACHIM ,  HOCK KARL-LUDWIG DR ,  BRUNNMUELLER FRITZ DR ,  KNITTEL HELMUT DR ,  KRANZ JOACHIM DR ,  SCHNEIDER ROLF DR ,  THOMA PETER DR

IPC: C09C1/26 ,  C25B1/00

Abstract: Blue iron hexacyanoferrate-III pigments are produced by a process wherein complex iron-II hexacyanoferrate-II (Berlin white) is prepared by electrolysis of an aqueous catholyte solution containing (a) an iron-II salt, (b) an alkali metal salt, an ammonium salt or a mixture of these, and (c) hydrogen cyanide, in an electrolysis cell in which the anode chamber and cathode chamber are separated by an ion exchange membrane, using an electrically conductive aqueous liquid in the anode chamber, and the iron-II hexacyanoferrate-II obtained is then converted to the blue pigment. The process gives Berlin white, which is substantially free from salt, in high yield and high purity. Pollution caused by the process is very low, since only a small amount of salt is produced. Compared with the corresponding blue pigments produced by prior art processes, the pigments obtained give purer colorations with better gloss, and are of higher color strength.

公开(公告)号：DE4200925A1

公开(公告)日：1993-07-22

申请号：DE4200925

申请日：1992-01-16

Applicant: BASF AG

Inventor： LIEDEK EGON DR ,  KNITTEL HELMUT DR ,  REISACHER HANS-ULRICH DR ,  MRONGA NORBERT DR ,  OCHMANN HARALD DR ,  WIENAND HENNING DR

IPC: C01B25/45 ,  C01G31/00 ,  C09C1/00

Abstract: Essentially monoclinic, according to X-ray crystallography, bismuth vanadate having the formula Bi[(V1-xPx)O4] in which x is from 0 to 0.1, characterised by a chroma of >/=85, a lightness of >/=80, a hue angle of from 89 to 95 and a photochromaticity having a DELTA E value of

公开(公告)号：DE3261338D1

公开(公告)日：1985-01-10

申请号：DE3261338

申请日：1982-03-24

Applicant: BASF AG

Inventor： KRANZ JOACHIM DR ,  HABERMANN WOLFGANG ,  DISTLER HARRY DR ,  KNITTEL HELMUT DR ,  HOCK KARL-LUDWIG DR ,  BRUNMUELLER FRITZ DR ,  SCHNEIDER ROLF DR

IPC: C09C1/00 ,  C01C3/12 ,  C09C1/22 ,  C25B1/00

Abstract: Blue iron hexacyanoferrate-III pigments (I) are prepared by anodic oxidation of metallic iron in hydrogen cyanide, or a reaction medium containing hydrogen cyanide, at pH 8. The process gives readily dispersible pigments (I) which are of high color strength and give brilliant, glossy colorations.

公开(公告)号：ES2072689T3

公开(公告)日：1995-07-16

申请号：ES92121741

申请日：1992-12-21

Applicant: BASF AG

Inventor： LIEDEK EGON DR ,  KNITTEL HELMUT DR ,  REISACHER HANS-ULRICH DR ,  MRONGA NORBERT DR ,  OCHMANN HARALD DR ,  WIENAND HENNING DR

IPC: C01B25/45 ,  C01G31/00 ,  C09C1/00

Abstract: Essentially monoclinic, according to X-ray crystallography, bismuth vanadate having the formula Bi[(V1-xPx)O4] in which x is from 0 to 0.1, characterised by a chroma of >/=85, a lightness of >/=80, a hue angle of from 89 to 95 and a photochromaticity having a DELTA E value of

公开(公告)号：DE59202344D1

公开(公告)日：1995-06-29

申请号：DE59202344

申请日：1992-12-21

Applicant: BASF AG

Inventor： LIEDEK EGON DR ,  KNITTEL HELMUT DR ,  REISACHER HANS-ULRICH DR ,  MRONGA NORBERT DR ,  OCHMANN HARALD DR ,  WIENAND HENNING DR

IPC: C01B25/45 ,  C01G31/00 ,  C09C1/00

Abstract: Essentially monoclinic, according to X-ray crystallography, bismuth vanadate having the formula Bi[(V1-xPx)O4] in which x is from 0 to 0.1, characterised by a chroma of >/=85, a lightness of >/=80, a hue angle of from 89 to 95 and a photochromaticity having a DELTA E value of

公开(公告)号：DE3643247A1

公开(公告)日：1988-06-30

申请号：DE3643247

申请日：1986-12-18

Applicant: BASF AG

Inventor： WIENAND HENNING DR ,  OSTERTAG WERNER DR ,  SCHWIDETZKY CHRISTOPH DR ,  KNITTEL HELMUT DR

IPC: C08K9/04 ,  C09C1/00 ,  C09C3/00 ,  C09C3/06 ,  C09C3/12 ,  C09D7/12

Abstract: Thermostable bismuth vanadate/molybdate pigments are prepared by precipitating onto a pigment, obtained by calcination, of the formula Bi VO4.Bi2Mo O6 where n is 0.2-2.5, in aqueous suspension at 70 DEG -100 DEG C. within the pH range from 4 to 9.5 a first SiO2-containing layer using an alkali metal silicate solution of a magnesium hexafluorosilicate solution, maintaining the suspension at 70 DEG -100 DEG C. for not less than 1 hour, producing a thick coating on the precoated pigment by adding further alkali metal silicate solution, magnesium hexafluorosilicate solution or a mixture of the two within the pH range from 4 to 9.5, and finally depositing wax on the SiO2-containing layer by means of a waxing emulsion/dispersion, the products showing, compared with the starting pigment, an appreciably improved thermal stability in plastics.