Hollow fibres of modified poly-(2,6-dimethyl-p-oxy-phenylene)
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United States of America Patent
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Dec 29, 1992
Grant Date -
N/A
app pub date -
Jun 12, 1992
filing date -
Jun 20, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A hollow fiber of amorphous, hydroxy-ethylated poly-(2,6-dimethyl-p-oxyphenylene) (PPO-OH) with a glass transition temperature (Tg) of from 180.degree. to 200.degree. C. is disclosed, which is formed by a high-density, microporous layer on a macroporous backing, and having an outer diameter comprised within the range of from 450 to 550 .mu.m and an inner diameter comprised within the range of from 250 to 400 .mu.m. The process for preparing the hollow fibre and the use of said fibre in the processes of separation of gas mixtures are disclosed as well.
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