Ink or toner compositions, methods of use, and products...

C - Chemistry – Metallurgy – 09 – D

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C09D 11/02 (2006.01) B41M 3/14 (2006.01) B42D 15/00 (2006.01) C09C 3/00 (2006.01) C09D 5/23 (2006.01) G03G 9/08 (2006.01)

Patent

CA 2684766

Magnetic ink and toner compositions traditionally comprise magnetic materials in fine particulate form, either as a dry composition or a liquid suspension. Often such materials are black or dark in colour. Disclosed herein are particles compositions suitable for use as inks or toners, that exhibit desirable magnetic properties, and furthermore which include particles coated so they appear white substantially white, or coloured. Such compositions present new opportunities for the production of corresponding magnetic layers, when the compositions are deposited in an appropriate manner to a substrate.

Les compositions d'encre et de toner magnétiques comprennent traditionnellement des matériaux magnétiques sous une forme particulaire fine, soit en une composition sèche, soit en une suspension liquide. Souvent, ces matériaux sont de couleur noire ou foncée. La présente invention concerne des compositions de particules adaptées pour être utilisées comme des encres ou des toners, qui présentent des propriétés magnétiques souhaitables, et qui comprennent en outre des particules revêtues de telle manière qu'elles apparaissent sensiblement blanches ou colorées. Ces compositions offrent de nouvelles possibilités pour la production de couches magnétiques correspondantes, lorsque les compositions sont déposées de manière appropriée sur un substrat.

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