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US5932688A Polybenzimidazole material with low metallic concentration and a process for production thereof 失效
具有低金属浓度的聚苯并咪唑材料及其生产方法

Polybenzimidazole material with low metallic concentration and a process
for production thereof
摘要:
An improved polybenzimidazole wherein the total concentration of metals other than alkali metal and alkaline earth metals is 10 ppm or less. The resulting polybenzimidazole is industrially useable in parts or components of apparatus for the manufacture of semiconductors and display devices.
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