Lenzing Aktiengesellschaft

E + E Elektronik Gesellschaft M.b.h.

Norbert Rossak

Klaus Weinrotter

Manfred Schobesberger

Herbert Sollradl

Robert Vodiunig

Walter Scharizer

Helmut Mitter

Use of a swellable plastic and process for making a resistive moisture

A process for producing high-temperature resistant and flame-retardant shaped articles of polyimide polymers of the general formula ##STR1## wherein A represents a four-valent group and R represents a divalent aromatic group, by heating a manipulatable sheet-like structure to a temperature in the glass transition range of between 280.degree. C. and 360.degree. and pressing it at pressures ranging between 10 bar and 500 bar. The polyimide shaped bodies obtained have densities of at least 1.30 g/cm.sup.3. Preferably, they may be completed as sheets having uniform thicknesses of between 0.1 and 6 mm.

Process for producing flame retardant high temperature resistant shaped

Growing community of inventors

Neukirchen a.d. Vockla, Austria

Norbert Rossak