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US 5,610,455 AGranted
Electret containing syndiotactic vinyl aromatic polymer
AssigneeMinnesota Mining and Manufacturing Company
InventorsRichard C. Allen, Anthony F. Flannery, Charles R. Kleissler, David B. Redmond
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Abstract
Electrets are disclosed comprising syndiotactic vinyl aromatic polymer, for example syndiotactic polystyrene. These electrets have good charge retention at elevated temperature.
Claims21
An electret, comprising:
- a charged dielectric composition;
- wherein said composition comprises a syndiotactic vinyl aromatic polymer.
An electret, comprising:
- an electrically charged dielectric film;
- wherein said film is oriented in at least one direction and comprises a syndiotactic vinyl aromatic polymer.
An electret, comprising:
- an electrically charged dielectric fiber;
- wherein said fiber is oriented in at least one direction and comprises a syndiotactic vinyl aromatic polymer.
Dependencies are inferred from the claim text.