发明授权
US09163106B2 Liquid resol-type phenolic resin and wet paper friction material 有权
液体酚醛树脂型酚醛树脂和湿纸摩擦材料

Liquid resol-type phenolic resin and wet paper friction material
摘要:
A straight-chain unsaturated hydrocarbon group having equal to or more than 10 carbon atoms is bonded to at least one or more of meta positions of all of phenol structure units.
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