Patent Number: 6,169,165

Title: Method for producing polybenzazole

Abstract: A method for producing polybenzazole in the presence of iron(II) ion. The polybenzazole obtained by this method can be formed into a highly strong fiber having a high elastic modulus and a heat resistant film. The method enables economical production of polybenzazole having fine tone and high polymerization degree.

Inventors: Kubota; Fuyuhiko (Ohtsu, JP), Fukushima; Masahiko (Ohtsu, JP), Koyama; Makiko (Ohtsu, JP)

Assignee: Toyo Boseki Kabushiki Kaisha

International Classification: C08G 73/22 (20060101); C08G 75/32 (20060101); C08G 75/00 (20060101); C08G 73/00 (20060101); C08G 73/18 (20060101); C08F 006/00 (); C08G 063/00 (); C08G 069/26 ()

Expiration Date: 01/02/2018