Production process

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 17/00 (2006.01) C09B 67/12 (2006.01) C09D 7/14 (2006.01)

Patent

CA 2237508

A process for the preparation of a paint concentrate which comprises (a) milling or acid pasting a crude metal phthalocyanine to reduce the particles size thereof, thereby forming a modified crude metal phthalocyanine and (b) kneading a mixture of the modified crude metal phthalocyanine together with a paint vehicle comprising one or more paint solvents, the metal phthalocyanine being present in an amount of 20 to 80% by weight of the kneaded mixture, to give a paint concentrate containing the metal phthalocyanine in pigmentary form dispersed in the paint vehicle.

Méthode pour préparer un concentré de peinture, consistant à : a) broyer ou mélanger avec de l'acide une phtalocyanine de métal brute, de façon à réduire la taille des grains et obtenir ainsi une phtalocyanine de métal brute modifiée; b) malaxer un mélange de la phtalocyanine de métal brute modifiée avec un véhicule pour peinture, renfermant un ou plusieurs solvants pour peinture; la phtalocyanine de métal est présente à raison de 20 à 80 % en poids du mélange de malaxage, ce qui permet d'obtenir un concentré de peinture renfermant la phtalocyanine de métal sous forme de pigments dispersés dans le véhicule à peinture.

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