Processability of intractable polymers

Details Processability of intractable polymers Processability of intractable polymers

1974-11-18

1976-07-13

Briggs, Sr., Wilbert J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260857R, 260895, C08L 7906, C08L 7904, C08L 7900

Patent

active

039694305

ABSTRACT:
Normally intractable high temperature resistant polymers which lack plastic flow characteristics, such as polymers of the BBB type [i.e., poly(bisbenzimidazobenzophenanthroline) and related nitrogenous polymers], are rendered capable of undergoing facile molding to form three-dimensional shaped articles. A minor proportion of a cross-linkable additive polymer exhibiting a recognizable glass transition temperature below its decomposition temperature (e.g., a polybenzimidazole) or precursors capable of forming the same is incorporated in substantially uniform physical admixture with the normally intractable polymer, the admixture shaped to form a three-dimensional article, and the resulting article is heated until the additive polymer is cross-linked and the thermal stability of the article is enhanced.

REFERENCES:
patent: 3574170 (1971-04-01), Chenevey
patent: 3584073 (1971-06-01), Vincent et al.
patent: 3600341 (1971-08-01), Schmidt et al.

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