| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyamide resin-modified novolak type phenolic resin obtaining a phenolic resin composition which excels in abrasion resistance and having good flexibility while maintaining mechanical strength and a coefficient of friction at the practical use level, its manufacturing method, and a friction material. SOLUTION: The method for manufacturing a polyamide resin-modified novolak type phenolic resin comprises a step (a) of dissolving a polyamide resin in a phenol to obtain a raw material mixed solution and a step (b) of reacting the above raw material mixed solution with an aldehyde using an acidic catalyst to obtain the polyamide resin-modified novolak type phenolic resin. The phenolic resin composition has a content of the polyamide resin-modified novolak-type phenolic resin obtained by this manufacturing method of 5-100 wt.% based on the entire phenolic resin composition, and the friction material contains the phenolic resin composition. COPYRIGHT: (C)2007,JPO&INPIT
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