| abstract |
The present invention relates to a process for coating magnets to be inserted into grooves of a rotor, comprising the steps of: providing permanent magnets, and applying a dry powder coating comprising a prepolymer, a curing agent , At least one functional filler and foaming agent, characterized in that the foaming agent is a chemical foaming agent. To avoid premature reaction of the prepolymer, the blowing agent is a chemical blowing agent. Furthermore, the invention relates to a permanent magnet and a rotor comprising a permanent magnet to which the process according to the invention is applied. |