Title:
PROCESS FOR PREPARING FLAKE-FORM PIGMENTS BASED ON ALUMINIUM AND ON SIOZ (Z=0 . 7-2.0)
Document Type and Number:
WIPO Patent Application WO2006021528
Kind Code:
A3
Abstract:
The present invention relates to process for the production of plane-parallel platelets, comprising the steps of: a) vapour-deposition of a separating agent onto a carrier to produce a separating agent 5 layer, b) vapour-deposition of at least one product layer onto the separating agent layer, and c) dissolution of the separating agent layer in a solvent and production of a suspension in which the at least one product layer is present in the form of plane-parallel platelets, wherein the separating agent is selected from the group consisting of anthracene, anthraquinone, acetamidophenol, acetylsalicylic acid, camphoric anhydride, benzimidazole, benzene-1,2,4-tricarboxylic acid, biphenyl-2,2-dicarboxylic acid, bis(4-hydroxyphenyl)sulfone, dihydroxyanthraquinone, hydantoin, 3-hydroxybenzoic acid, 8-hydroxyquinoline-5-sulfonic acid monohydrate, 4-hydroxycoumarin, 7-hydroxycoumarin, 3-hydroxynaphthalene-2-carboxylic acid, isophthalic acid, 4,4-methylene-bis-3-hydroxynaphthalene-2-carboxylic acid, naphthalene-1,8-dicarboxylic anhydride, phthalimide and its potassium salt, phenolphthalein, phenothiazine, saccharin and its salts, tetraphenylmethane, triphenylene, triphenylmethanol, and also mixtures of at least two of those substances, especially pentaerythritol (C(CH2OH)4), trimesic acid (= 1,3,5 bezene tricarboxylic acid), DL-alanine, DL-valine, 2,6- 20 diaminopurine, ascorbic acid, 1,3,5-benzenetricarboxylic acid, o-acetylsalicyclic acid, diphenic acid, terephthalic acid, pyrogallol, cyanuric acid, hexamethyltetramine (urotropin), fumaric acid, and 4-acetylbenzoic acid and also mixtures of at least two of those substances.
Inventors:
BUJARD PATRICE (CH)
BERENS ULRICH (DE)
BERENS ULRICH (DE)
Application Number:
PCT/EP2005/053994
Publication Date:
May 04, 2006
Filing Date:
August 15, 2005
Export Citation:
Assignee:
CIBA SC HOLDING AG (CH)
BUJARD PATRICE (CH)
BERENS ULRICH (DE)
BUJARD PATRICE (CH)
BERENS ULRICH (DE)
International Classes:
C09C1/00
Domestic Patent References:
| WO2002094945A1 | 2002-11-28 | |||
| WO2004052999A2 | 2004-06-24 | |||
| WO2003106569A1 | 2003-12-24 | |||
| WO2004065295A1 | 2004-08-05 | |||
| WO2004020530A1 | 2004-03-11 |
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