C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 5/03 (2006.01) B05C 19/00 (2006.01) B05D 1/06 (2006.01) B05D 1/12 (2006.01) B05D 1/28 (2006.01) G01N 19/08 (2006.01)
Patent
CA 2188024
An adhesive-free dry, free-flowing powder composition suitable for use in surface defect detection, where the powder composition comprises a physical mixture of particles of a colorant and particles of an extender, which mixture includes particles of colorant and particles of extender each having a particle size of less than 100 µm. The powder compositions of the invention provide a simple, effective guide coat which readily highlights surface imperfections, such as scratches, orange peel effect and dry over-spray without the need for solvents. Also, there are disclosed methods of using such a powder composition to detect surface imperfections, an apparatus for applying same, a device for refilling such applying apparatus, and coated surfaces formed thereby.
Composition à base de poudre sèche, coulante et non adhésive servant à détecter efficacement des défauts de surface et comprenant un mélange de particules d'un colorant et de particules d'un diluant présentant chacune une dimension inférieure à 100 µm. Ces compositions constituent un revêtement de détection simple et efficace, qui accentue immédiatement les imperfections de surface, telles que des éraflures, l'effet de peau d'orange et des bavures de peinture sèches, sans qu'il soit nécessaire d'utiliser de solvant. L'invention concerne également des procédés d'utilisation de ladite composition, afin de détecter des imperfections de surface, un appareil d'application de ladite composition, un dispositif de recharge dudit appareil, ainsi que les surfaces obtenues au moyen de ladite composition.
Minnesota Mining And Manufacturing Company
Smart & Biggar
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