C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 133/24 (2006.01) B05C 19/02 (2006.01) C09D 177/00 (2006.01) C09D 177/02 (2006.01) B05D 1/24 (2006.01) B05D 3/02 (2006.01)
Patent
CA 2435689
Disclosed is a polyamide powder for coating a metal surface by a fluidized-bed coating process, wherein: the powder has a median grain size d 50 of from 20 to 90 µm, the powder has a content of fine particles whose median grain size is less than 5 µm of below 1%, and the powder has at least 75% of spherical particles in which all three spatial axes x, y and z of the particles are within ~ 10% of the same dimension. The powder is useful in a fluidized-bed coating process, especially in producing a chromate-free coating on a steel pipe, such as pipes in automobiles.
Heinrich Dirk
Scholten Heinz
Degussa Ag
Evonik Degussa Gmbh
Fetherstonhaugh & Co.
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