Process for producing electret, and electrostatic induction conversion device
AssigneeAsahi Glass Company, Limited
InventorKimiaki Kashiwagi
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Abstract
The present invention provides a process for producing an electret which has high thermal stability of retained electric charge and which has excellent charge retention performance. This is accomplished by a process for producing an electret which includes a step of thermally treating a fluorinated polymer and a silane coupling agent, where the fluorinated polymer has an alicyclic structure in its main chain and has a carboxy group or an alkoxycarbonyl group as its terminal group; the silane coupling agent has an amino group; and the weight average molecular weight of the fluorinated polymer is at least 200,000.
Claims7
A process for producing an electret, which comprises a step of thermally treating a composition comprising a fluorinated polymer and a silane coupling agent, wherein the fluorinated polymer has an alicyclic structure in its main chain and has a carboxy group or an alkoxycarbonyl group as its terminal group;
- the silane coupling agent has an amino group;
- and the weight average molecular weight of the fluorinated polymer is from 200,000 to 600,000.
Dependencies are inferred from the claim text.