| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a polyimide fiber superior in both properties of flame resistance and heat resistance, and to provide a method for producing the same. <P>SOLUTION: The polyimide fiber is produced by the steps of: polymerizing at least one aromatic acid anhydride (A) represented by formula (I) (in the formula, R1 represents -(CH<SB POS="POST">2</SB>)<SB POS="POST">m</SB>- or -O-, and m represents an integer of 1-3), an aromatic acid anhydride (B) and aromatic diamine; obtaining a polyamic acid fiber by compounding them so that a ratio (weight ratio) of the aromatic acid anhydride (A) to the aromatic acid anhydride (B) becomes in a range of 95/5-15/85; and imidizing the polyamic acid fiber. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
