Patent ID: 9534650
Date: 2017-01-03
CPC Classifications: C08H,C08L,F16D

Claim:
1. A friction material containing, as a binder, a cardanol-modified lignin-phenol resin having a weight average molecular weight of 5,000 or less, as measured by gel permeation chromatography, generated by reacting a lignin, a phenol, a cardanol, and an aldehyde in the presence of an acid catalyst, wherein the following relative amounts of the lignin, phenol, and cardanol are reacted with the aldehyde in the presence of the acid catalyst to generate the cardanol-modified lignin-phenol resin: 100 parts by mass of the lignin; 20-200 parts by mass of the phenol; and 1-50 parts by mass of the cardanol.