Process of making a sintered polybenzimidazole article

Plastic and nonmetallic article shaping or treating: processes – Forming articles by uniting randomly associated particles – Autogenously or by activation of dry coated particles

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264235, 264237, 26433112, 26433119, 26433121, B29C 6704, C08G 6926

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active

048615374

ABSTRACT:
Sintered polybenzimidazole articles are obtained by compacting a particulate, dried polybenzimidazole resin under a pressure of 2,000 to 10,000 psi in a mold, heating the formed article to a temperature in the range of 825.degree. to 950.degree. F. for at least four hours, cooling the polybenzimidazole article to below 800.degree. F. while maintaining the article under a pressure of 2,000 to 10,000 psi, and thereafter heating the constrained formed polybenzimidazole article to a temperature in the range of 825.degree. to 950.degree. F. for at least one hour.

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Harb, M. E. et al., "Cure Cycle Optimization of Compression Molded High Molecular Weight Celazole PBI Resin", 32nd International Sampe Symposium (1987), pp. 795-806.
Jones, J. F. et al., "Polybenzimidazole Composites", International Conference on Composite Materials IV, Aime, Warrendale, Pa. (1985), pp. 1591-1599.
Ward, B. C., "Use of Polybenzimidazoles in Compression Molding", Fabricating Composites '86 Conference, Baltimore, Md. (1986), pp. EM 86-704-1-12.
Ward, B. C., "Effects of Molecular Weight and Cure Cycle on the Properties of Compression Molded Celazole PBI Resin", 32nd International Sampe Symposium (1987), pp. 853-867.

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