Process of coating aluminum materials molded by extrusion

Details Process of coating aluminum materials molded by extrusion Process of coating aluminum materials molded by extrusion

B - Operations, Transporting

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B32B 15/02 (2006.01) B05D 7/14 (2006.01) B32B 15/08 (2006.01) C09D 183/04 (2006.01)

Patent

CA 1104009

ABSTRACT OF THE DISCLOSURE Extruded aluminum or aluminum-based alloy bars are coated with an organopolysiloxane composition, comprising an organopoly- siloxane expressed by the average unit formula Image where R1 is the same or different monovalent hydrocarbon group and a is in the range from 1.10 to 1.90 inclusive, before being cooled to be- low a temperature of 250°C, i.e. while at a temperature between about 550 and 250°C. The coated aluminum bars are preferably subjected to annealing. The coatings formed on the surfaces of the bars have a superior resistance to attack by chemicals, wea- ther, stains and heat as well as excellent adhesion and mechani- cal properties.

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