Organic friction material composition for use to produce frictio

Details Organic friction material composition for use to produce frictio Organic friction material composition for use to produce frictio

1990-01-16

1993-10-05

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523153, 524452, 524453, 524454, C08J 514, C08K 712

Patent

active

052505880

ABSTRACT:
Disclosed is an organic friction material composition useful to produce any kind of friction linings, such as brake linings or clutch linings, that have to be capable of withstanding high operating temperatures and pressures for substantial periods of time. The composition comprises a thermosetting resin having heat resistant properties, and a fibrous-like synthetic forsterite obtained by calcination of chrysotile asbestos fibers at a temperature of from 650.degree. C. to 1450.degree. C., the synthetic forsterite having an MgO: SiO2 ratio lower than 1.1, a raw loose density of from 3 to 40 pounds per cubic foot, a thermal conductivity K factor of from 0.25 to 0.40 BTU. in/hr. .degree.F.ft.sup.2 and a fusion point of from 1600.degree. to 1700.degree. C., the weight ratio of resin to synthetic forsterite ranging from 0.25 to 0.70. The composition also comprises friction additives in such an amount as to adjust the friction and wear properties of the material to some predetermined values, and, if desired, other additives and fillers, with the proviso that the ratio of the total weight of all of these additives and fillers to the total weight of the composition is equal to or lower than 0.55.

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