本发明公开了一种腰果酚基双元酚及其制备方法与应用，通过两步法合成，首先在碱性环境下使腰果酚与甲醛反应生成羟甲基化产物，通过控制反应温度与反应时间，实现对羟甲基化腰果酚产物与剩余腰果酚原料比例的控制，然后加入酸性催化剂来实现高纯度腰果酚基双酚的合成。该双元酚材料生物基占比高于97％，结构中具有两个R链与两个苯环，在有效增韧的同时，可以获得高的环氧涂层交联密度及刚性和热稳定性。

The present invention discloses a cashew phenol based bisphenol and its preparation method and application, which is synthesized through a two-step method. Firstly, cashew phenol reacts with formaldehyde in an alkaline environment to generate hydroxymethylated products. By controlling the reaction temperature and time, the proportion of hydroxymethylated cashew phenol products to the remaining cashew phenol raw materials is controlled. Then ntroducing acidic catalysts to achieve the synthesis of high-purity cashew phenolic bisphenol. This binary phenolic material has a biological group proportion of over 97%, and has two R chains and two benzene rings in its structure. While effectively toughening, it can achieve high epoxy coating crosslinking density, rigidity, and thermal stability.