C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 5/36 (2006.01) C08B 13/00 (2006.01) C09B 67/00 (2006.01) C09K 19/00 (2006.01) C09K 19/38 (2006.01)
Patent
CA 2190879
The invention relates to interference pigments for effect finishes, to effect paints produced therewith, and to commodity articles, especially vehicle bodies, painted with these paints. In order to make it possible to prepare chiral nematic polymers for such effect paints more simply, i.e. in fewer synthesis steps, with, more- over, only a readily available component of favourable cost being required, the interference pigments consist in accordance with the invention of esterified cellulose ethers. With these interference pigments it is possible to produce, in the coating, an alternation of colour which is dependent on the direction of incidence of light and on the direction of viewing, or particularly intense shades of previously unknown brightness, on the article painted therewith.
L'invention concerne des pigments d'interférence pour laques à effet, des laques à effet mélangées avec ces pigments et des objets d'utilisation courante ainsi laqués, notamment des carrosseries de véhicules automobiles. Afin qu'il soit possible de préparer des polymères chiraux-nématiques pour de telles laques à effet de manière plus simple, c'est-à-dire avec moins d'étapes de synthèse, en utilisant uniquement un composant facilement disponible et économique, ces pigments d'interférence sont constitués d'éthers de cellulose estérifiés. Ces pigments d'interférence permettent de générer sur l'objet laqué un effet de moirage en fonction de la direction d'incidence de la lumière et de la direction d'observation, ou des tonalités particulièrement intenses d'une brillance auparavant inconnue.
Kirschbaum Martin
Muller-Rees Christoph
Sailer Maria-Theresia
Borden Ladner Gervais Llp
Daimler-Benz Aktiengesellschaft
Wacker-Chemie Gmbh
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