Hoechst Celanese Corporation

Todd E Andres

O Richard Hughes

William M Cooper

Edwardo Alvarez

Eduardo Alvarez

Chun Wang

Wendell G Whiteside

A polymeric composition containing internal lubricants is suitable for low friction applications. The composition contains from about 65 to about 85 weight percent of a polymeric blend and from about 15 to about 35 weight percent of internal lubricants, wherein said blend consists essentially of from about 35 to about 100 weight percent of polybenzimidazole and from about 0 to about 65 weight percent of poly(aryletherketone), and said lubricants consist essentially of graphite and boron nitride in a weight ratio of about 1:10 to about 10:1, respectively. The composition is useful for preparing shaped articles such as bearings, bearing sleeves, rings, etc.

Self-lubricating composition containing polybenzimidazole, graphite and

A compactible polybenzimidazole composition contains from about 95 to about 5 weight percent of solid lubricant particles which are uniformly dispersed and encapsulated in from about 55 to about 95 weight percent of polybenzimidazole. The solid lubricant comprises graphite and boron nitride in a weight ratio of about 10:1 to about 1:10. The composition is useful for preparing self lubricating, shaped articles such as bearings, bearing sleeves, rings, seals, etc. which exhibit low friction properties.

Self lubricating polybenzimidazole shaped articles

A process for heat treating polymeric compositions into a shaped article comprising the steps of:

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Todd E Andres