Electrets

Details Electrets Electrets

C - Chemistry, Metallurgy

08

F

204/96.17

C08F 2/52 (2006.01) C08J 3/28 (2006.01) H01G 7/02 (2006.01)

Patent

CA 1146907

11,315 ELECTRETS ABSTRACT OF THE DISCLOSURE A process for preparing polymer electrets comprising the following steps: (a) providing two electrodes in a deposition zone, said electrodes being in a spaced relationship to one another, having opposing surfaces, and being connected to an external voltage source capable of impressing an intense electric field between the opposing surfaces; (b) providing a dipolar substituted p-xylylene monomer vapor in sufficient amount to coat the opposing surfaces of the electrodes; (c) activating the power source; and (d) introducing the vapor from step (b) into the deposition zone, said zone being under vacuum and at a temperature at which the vapor will condense, whereby the vapor condenses on the opposing surfaces of the electrodes, the monomer polymerizing to parylene, coating said surfaces, and forming electrets. SPECIFICATION

359570

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