Process for the production of friction materials
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United States of America Patent
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Jan 18, 1994
Grant Date -
N/A
app pub date -
Oct 28, 1992
filing date -
Oct 29, 1991
priority date (Note) -
Expired
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Abstract
A process for producing a friction material under low-temperature conditions using, as a reinforcement, one or more fibers selected from a metal fiber, an organic fiber and an inorganic fiber and, as a binder, a compounded pitch that consists of a mesophase pitch and sulfur and/or an aromatic nitro compound. The content of an optically anisotropic phase in the mesophase pitch is at least 80% and the softening point of the mesophase pitch is not higher than 270.degree. C. The friction material produced exhibits consistent friction characteristics over a broad temperature range.
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