| 摘要 |
PROBLEM TO BE SOLVED: To provide a phenol resin compsn. excellent in curing property and suitable as a binder for obtaining a friction material excellent in vibration absorption. SOLUTION: This phenol resin compsn. comprises a phenol resin which is a polycondensation product of phenols and aldehydes and the ratio of ortho bonding and para bonding (o/p ratio) of the methylene bonds in the resin is not less than 0.7 and less than 1.0 and a rubber component which is pref. a nitrile-butadiene rubber or an elastomer contg. acrylic acid ester, and its content is 3-30 wt.%. |
