Heat-stable iron oxide black pigments, processes for their...

Details Heat-stable iron oxide black pigments, processes for their... Heat-stable iron oxide black pigments, processes for their...

C - Chemistry, Metallurgy

01

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6/210, 23/267, 2

C01G 49/02 (2006.01) C01G 49/08 (2006.01) C04B 14/30 (2006.01) C04B 14/36 (2006.01) C09C 1/24 (2006.01) C09D 7/12 (2006.01)

Patent

CA 1331274

NEW HEAT-STABLE IRON OXIDE BLACK PIGMENTS, PROCESSES FOR THEIR PRODUCTION AND THEIR USE ABSTRACT OF THE DISCLOSURE A heat-stable iron oxide black pigment resistant to hydrothermal treatment in air fit temperatures above 180°C and which has a specific BET surface of 0.5 to 5 m2/g.is useful as a coloring agent for building materials, paints,cements, bricks and so forth and is prepared by reacting an aqueous solution of FeOOH, iron(II) salts and alkalis at elevated temperature and precipitating iron oxide from the solution with Na2CO3 fit temperatures in the range from 80°C to the boiling point of the solution.

603601

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