Wet friction material

Details Wet friction material Wet friction material

2006-03-24

2009-02-17

Salvatore, Lynda (Department: 1794)

Fabric (woven, knitted, or nonwoven textile or cloth, etc.)

Coated or impregnated woven, knit, or nonwoven fabric which...

Coated or impregnated natural fiber fabric

C442S149000, C428S391000

Reexamination Certificate

active

07491664

ABSTRACT:
The invention provides a wet friction material having high friction coefficient, excellent compression fatigue property and positive gradient of a μ-V property. The wet friction material contains a paper base material and a binder, in which the binder contains a cured material of a liquid resin composition obtained by mixing a hydrolyzed solution of a silane coupling agent represented by the following formula (1) and a resol-type phenol resin, and a weight ratio (S/R) between respective non-volatile components of the hydrolyzed solution (S) of the silane coupling agent and the resol-type phenol resin (R) is in the range of from 80/20 to 20/80: (X)(R1)nSi(OR2)3−n(1), in which X represents an alkylamino group having a primary amine at a terminal; R1and R2each independently represent an alkyl group having from 1 to 3 carbon atoms; and n represents an integer of 0 or 1.

REFERENCES:
patent: 6831146 (2004-12-01), Aiba et al.
patent: 2002-363542 (2002-12-01), None

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