Friction element containing phenol-formaldehyde-alkylphenol bind

Details Friction element containing phenol-formaldehyde-alkylphenol bind Friction element containing phenol-formaldehyde-alkylphenol bind

1979-12-10

1981-05-19

Schain, Howard E.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

74214, 74215, 74216, 260 334R, 260 38, 26099813, 26433122, 528137, 528140, 528141, 528143, 528144, 528145, 528147, C08G 812, C08L 6110

Patent

active

042686571

ABSTRACT:
Improved friction elements suited for use for example in an automotive or similar brake or in a clutch are provided by employing therein as a binder the reaction product of phenol, formaldehyde, and monoalkylphenol having from 4 to about 20 carbon atoms in the alkyl group. The mole ratio range of phenol:alkylphenol:formaldehyde is about 2:1-5:1-7 and the number of moles of phenol and alkylphenol combined exceeds the number of moles of formaldehyde. An improved method of making friction elements is also provided which uses such binder.

REFERENCES:
patent: 2025951 (1935-12-01), Kuzmick
patent: 2114121 (1938-04-01), Bender
patent: 2554128 (1951-05-01), Spokes
patent: 4096108 (1978-06-01), Webb et al.
Chem. Abstracts, vol. 78, 160466, 1973, Ouchi et al.

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