摘要 |
Acrylic fibers suitable for producing preoxidized fibers free from coalescence which have a fluorine-containing surface active agent or further have at least one phosphoric surface active agent selected from the group consisting of compounds represented by the following formulae (I), (II) and (III): <IMAGE> (I) <IMAGE> (II) [R1CON(CH2CH2OH)2]X' (III) (wherein all the symbols are defined in the appended claims). |