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
049736302
ABSTRACT:
Miscible compositions comprising from about 1 part by weight to about 99 parts by weight of an aromatic polyetherimide and from about 99 parts by weight of 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 polyetherimide 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 polyetherimide be present in the composition in an amount sufficient to make the aromatic polybenzimidazole more thermally processable 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 an aromatic polyetherimide. In a composition mostly comprised of an aromatic polyetherimide, it is preferred that the aromatic polybenzimidazole be present in an amount sufficient to render the aromatic polyetherimide less sensitive to solvents, and to increase the glass transition temperature of the polyetherimide. More preferably, such compositions are comprised of from about 65 parts by weight to about 95 parts by weight of an aromatic polyetherimide and from about 35 parts by weight to about 5 parts by weight of an aromatic polybenzimidazole.
REFERENCES:
Plast. Massy 1973 (4) 15-17, Chudina et al., "Polyimides and Polybenzimidazoles for Glass-Fiber Reinforced Plastics and Adhesives" (English Translation and Abstract).
Report 1985, U. Mass Dep. Poly. Sci. Eng., Order No. AD-A166150/3/Gar-Improved Structural Polymor Alloys and Composites.
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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