E.i. Dupont De Nemours and Company

University of Delaware

L'air Liquide, S.a.

Timothy D Krizan

Robert Ray Burch

Brian C Auman

Eric William Kaler

Susan H Tilford

Jesus G Moralez

Lloyd Abrams

Larry D Ryan

Michael T Pottiger

Mark R Schmeckpeper

John C Coburn

John C Dauer

Martin W Prellwitz

Polyimide resin compositions that contain an end-capped rigid aromatic polyimide, graphite and, optionally, a filler selected from sepiolite, attapulgite, kaolinite, or a mixture thereof, are found to exhibit low wear at high temperatures. Such compositions are especially useful in molded articles that are exposed to wear conditions at high temperatures such as aircraft engine parts.

Polyimide resins for high temperature wear applications

Polyimide resin compositions that contain an aromatic polyimide, graphite and a sepiolite filler, or a mixture of a sepiolite filler and a kaolin filler, are found to exhibit low wear and high thermal oxidative stability. Such compositions are especially useful in molded articles that are exposed to wear conditions at high temperatures such as aircraft engine parts.

Disclosed herein is a composite part for an airplane engine comprising polymer selected from polyimide, polyamide-imide, polyether imides, polybenzimidazole, or blends thereof, and carbonaceous filler, which in combination provides thermal stability and wear resistance. Optionally, the composite may comprise particulate.

Composite parts for airplane engines

Polyimide resin compositions that contain an aromatic polyimide, graphite and a kaolin filler, are found to exhibit low wear and high thermal oxidative stability. Such compositions are especially useful in molded articles that are exposed to wear conditions at high temperatures such as aircraft engine parts.

The invention relates to a resin polymer blend comprising at least two dry blended, non-melt processible resin polyimide particulates, wherein the non-melt processible resin polyimide articulates are molded by compression molding.

Blends of high temperature resins suitable for fabrication using powdered metal or compression molding techniques

A microemulsion comprising: a functionalized hydrocarbon, an anionic surfactant, a diol having from 2 to 10 carbon atoms and water.

Aqueous microemulsions

Formation of polyimide film with a preselected coefficient of thermal expansion is disclosed employing relationships between cure temperature and heating rates.

Process for preparing a polyimide film with a preselected value for CTE

The disclosed invention is directed to polycyanoarylether membranes. These membranes are formed by reacting an aromatic diol with a dihalobenzonitrile or dinitrobenzonitrile in the presence of a base and a polar, aprotic solvent. These membranes can be provided as either homopolymers or copolymers.

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Wilmington, DE, United States of America

Timothy D Krizan