PREPARATION OF POLYBENZOXAZOLES FROM HALOGENATED POLYAMIDE ANIONS

• Main Author: BURCH, ROBERT, RAY, JR
• Format: Patent
• Language: English; French; German
• Published: 30.11.1994
• Edition: 5
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

This invention relates to a process for making polymers containing benzoxazole groups by heating, and thereby dehalogenating, novel anions of orthohalogenated aromatic amide groups of a polyamide. The products are useful as fibers and films.