C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
C09B 67/00 (2006.01) C09D 5/36 (2006.01) C09K 19/00 (2006.01) C09K 19/36 (2006.01) C09K 19/38 (2006.01) C09K 19/40 (2006.01) C09K 19/52 (2006.01)
Patent
CA 2191251
The invention relates to painted commodity articles, especially vehicle bodies, and to coating materials for painting such components. In order to make it possible to achieve new. previously unknown colour effects with the coating material, in accordance with the invention there have been incorporated by mixing, into the coating material, interference pigments of which at least some, preferably all, are plateletlike, which automatically align themselves approximately parallel to the surface of the article in the course of application of the coating material, and which are composed of liquid-Crystalline side-chain polymers (LCPs) consisting of a nematic component and a chiral component, in which the side-group mesogens are least approximately in nematic and/or smectic and/or cholesteric order. By this means it is possible to produce, on the article painted therewith, 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.
L'invention concerne des objets laqués d'utilisation courante, notamment des carrosseries de véhicules, et des laques utiles pour laquer ces objets. Afin d'obtenir avec cette laque des effets nouveaux de coloration inconnus dans l'état de la technique, on mélange à la laque au moins certains pigments d'interférence en paillettes ou uniquement de tels pigments. Lorsque la laque est appliquée, ces pigments s'orientent automatiquement dans une direction à peu près parallèle à la surface de l'objet. Ces pigments sont constitués de polymères à chaînes latérales à cristaux liquides qui contiennent un composant nématique et un composant chiral. Les mésogènes des groupes latéraux sont aux moins approximativement nématiques, smectiques et/ou cholestériques. On peut ainsi 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.
Gailberger Michael
Mueller-Rees Christoph
Stohr Andreas
Strohriegl Peter
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Daimler-Benz Ag
Sicpa Holding Sa
Wacker-Chemie Gmbh
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