C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
31/121
C09D 5/46 (2006.01) C04B 41/45 (2006.01) C04B 41/50 (2006.01) C04B 41/81 (2006.01) C04B 41/87 (2006.01) C23D 5/04 (2006.01)
Patent
CA 2009294
CERAMIC POWDERS FOR ELECTROSTATIC POWDER COATING AND PROCESSES FOR THEIR PREPARATION ABSTRACT OF THE DISCLOSURE Surprisingly good adhesion is achieved between the surface of a ceramic article and ceramic powder applied to said surface by electrostatic techniques when the ceramic powder particles are surface treated with electrically insulating substances which comprise halogen-free polysiloxanes or mixtures thereof which react with their reactive groups at the particle surfaces of the ceramic powders and are present in an amount of 0.05 to 0.1% by weight, relative to the ceramic powder, and the ceramic powder, which has been milled at a milling temperature of 70 to 100°C or has been cold-milled and then after-treated at temperatures of between 70°C and 300°C, has a fineness of 1 to 100 µm, a resistivity of 1012 to 1016 ohm.cm, a cubic coefficient of thermal expansion of (130 - 230) . 10-7K-1 and a fluidity of 50 - 90 g/30 sec. LeA 26 534
Broggi Giovanni
Zybell Paul
Bayer Italia S.p.a.
Broggi Giovanni
Fetherstonhaugh & Co.
Zybell Paul
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