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EP0332071A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Process for preparing especially bluish nacreous pigments

Assignee: BASF SE
•
Filing: 1989-03-03
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Granted: —
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Expires: 2009-03-03
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Abstract

Abstract Translated from German Zur Herstellung besonders blaustichiger Perlglanzpigmente werden mit Titandioxid beschichtete Glimmerpigmente unter ständiger Bewegung mit Ammoniak bei Temperaturen von 750 bis 850°C behandelt. Die optische Schichtdicke der Titandioxidbeschichtung beträgt 50 bis 100 nm oder 300 bis 340 nm. To produce particularly bluish pearlescent pigments, mica pigments coated with titanium dioxide are treated with ammonia at temperatures of 750 to 850 ° C. with constant agitation. The optical layer thickness of the titanium dioxide coating is 50 to 100 nm or 300 to 340 nm.

Inventors

  • 👤 Werner Dr. Ostertag
  • 👤 Norbert Dr. Mronga
  • 👤 Ulrich Dr. Graessle

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-05 18:15
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/0015; C09C1/0021; C01; C01P; C01P2002/00; C01P2002/50; C01P2002/52; C01P2006/00; C01P2006/60; C01P2006/62; C01P2006/63; C01P2006/64; C09C2200/00; C09C2200/10; C09C2200/102; C09C2200/30; C09C2200/301; C09C2200/302; C09C2200/306; C09C2200/308; C09C2220/00; C09C2220/20

Claims Analysis

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References Cited (Backward Citations)

DE3433657A1 Cited

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