Production of high temperature resistant polymer compositions ca

Details Production of high temperature resistant polymer compositions ca Production of high temperature resistant polymer compositions ca

1977-01-17

1978-09-12

Lusignan, Michael R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 292N, 260 308R, 260 37R, 260823, 260857R, 427341, 428294, 264129, C08G 4102, C08G 5116, C08G 6948, C08G 7318

Patent

active

041136837

ABSTRACT:
Reinforced high temperature molding compositions are provided by a two step precipitation process wherein a polymer matrix comprising either (a) a nitrogenous intractable high temperature resistant polymer such as poly(bisbenzimidazobenzophenanthroline) or (b) an admixture comprising a major amount of the nitrogenous intractable high temperature resistant polymer of (a) and a minor amount of a cross-linkable polymer such as a polybenzimidazole, is affixed to the surface of a partially plasticized organic fiber derived from polymers selected from the group consisting of (1) a nitrogenous intractable high temperature resistant polymer, (2) polybenzimidazoles (3) high temperature resistant aromatic polyamides, and (4) high temperature resistant aromatic polyesters and mixtures thereof. More specifically, the matrix polymer is initially partially precipitated onto the surface of the organic fibers from a solution such as a sulfuric acid dope and then completely precipitated by an appropriate nonsolvent medium wherein the matrix polymer is affixed to the surface of the organic fiber in the form of a fiber particle aggregate. The resulting composition is capable of providing a three dimensional article having improved flexural strength.

REFERENCES:
patent: 3505277 (1970-04-01), Soehngen
patent: 3987015 (1976-10-01), Driscoll et al.

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