Friction material
AssigneeAkebono Brake Industry Co., Ltd.
InventorMotoki KUROE
Life of this patent
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Abstract
A friction material containing, as a binder, a lignin-phenol resin having a weight average molecular weight of 5,000 or less or a cardanol-modified lignin-phenol resin having a weight average molecular weight of 5,000 or less. The friction material is produced by a method including: reacting a lignin having a weight average molecular weight of 5,000 or less, a phenol, an aldehyde, and optionally a cardanol, in the presence of an acid catalyst.
Claims17
A friction material containing, as a binder, a lignin-phenol resin having a weight average molecular weight of 5,000 or less or a cardanol-modified lignin-phenol resin having a weight average molecular weight of 5,000 or less.
A method for producing a friction material, the method comprising:
- reacting a lignin having a weight average molecular weight of 5,000 or less, a phenol and an aldehyde in the presence of an acid catalyst, thereby obtaining a lignin-phenol resin.
A method for producing a friction material, the method comprising:
- reacting a lignin having a weight average molecular weight of 5,000 or less, a phenol, a cardanol and an aldehyde in the presence of an acid catalyst, thereby obtaining a cardanol-modified lignin-phenol resin.
Dependencies are inferred from the claim text.