Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1986-02-19
1990-11-27
Carrillo, Ana L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525435, 525931, C08L 7906, C08L 7908
Patent
active
049736299
ABSTRACT:
Miscible compositions comprising from about 1 part by weight to about 99 parts by weight of an aromatic polyimide and from about 99 parts by weight to about 1 part by weight of an aromatic polybenzimidazole. Preferably, the composition comprises from about 5 parts by weight to about 95 parts by weight of an aromatic polyimide and from about 95 parts by weight to about 5 parts by weight of an aromatic polybenzimidazole. In a composition mostly comprised of an aromatic polybenzimidazole, it is preferred that the aromatic polyimide be thermoplastic and be present in the composition in an amount sufficient to make the aromatic polybenzimidazole more processable for molding purposes and also less susceptible to moisture. More preferably, such compositions are comprised of from about 65 parts by weight to about 95 parts by weight of an aromatic polybenzimidazole and from about 35 parts by weight to about 5 parts by weight of a thermoplastic aromatic polyimide. In a composition mostly comprised of a soluble, thermoplastic aromatic polyimide, it is preferred that the aromatic polybenzimidazole be present in an amount sufficient to render the soluble thermoplastic aromatic polyimide less sensitive to solvents, and to increase its glass transition temperature. More preferably, such compositions are comprised of from about 6 parts by weight to about 95 parts by weight of a soluble thermoplastic aromatic polyimide and from about 35 parts by weight to about 5 parts by weight of an aromatic polybenzimidazole.
REFERENCES:
Report 1985, Univ. Mass., Dept. Poly. Sci. Eng., Order No. AD-A166150/3/GAR-"Improved Structural Polymer Alloys and Composites", 1985.
Plast. Massy 1973 (4) 15-17, Chudina et al., "Polyimides and Poly(Benzimidazoles) for Glass-Fiber Reinforced Plastics and Adhesives", (English translation attached).
Jaffe Michael
Karasz Frank E.
Leung Louis
MacKnight William J.
Williams David J.
Carrillo Ana L.
Hoechst Celanese Corp.
Macklin Kenneth E.
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