Stable electrets of styrene-type polymers

Details Stable electrets of styrene-type polymers Stable electrets of styrene-type polymers

1976-11-26

1978-04-25

Pitlick, Harris A.

Electrical transmission or interconnection systems

Anti-induction or coupling to other systems

252 632, 361233, H01B 344

Patent

active

040864995

ABSTRACT:
An electret made of styrene-type polymer (e.g., polystyrene), having a volume resistivity of at least 10.sup.16 ohm-cm and a glass transition temperature above 50.degree. C, and containing not more than 1% by weight of electron-donor impurities and not more than 0.5% by weight of electron-acceptor impurities, said electret being capable of retaining at least 75% of its charge after exposure to a temperature of 50.degree. C and a relative humidity of 100% for 100 days.

REFERENCES:
patent: 3755043 (1973-08-01), Igarashi et al.
ACS Monograph "Styrene Its Polymers etc.", Boundy et al., pp. 546-548, 553-557.

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