Process for making carbon foam induced by process depressurization
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United States of America Patent
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Jun 10, 2003
Grant Date -
Dec 19, 2002
app pub date -
May 22, 2001
filing date -
May 22, 2001
priority date (Note) -
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Abstract
A process for producing molded pitch based foam is shown which provides a more uniform density gradient throughout the ultimate product. The process utilizes a pressure drop during processing in order to induce foaming. By inducing foaming through process depressurization, additional viscosity manipulation can be achieved as well as improved density gradient characteristics in the ultimate product.
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