方法醇类溶剂提取法、离子交换树脂分离法。

Methods Alcohol and strong acid cation exchange resin were used in the extraction and separation.

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使制得的复膜胶可采用乙醇作醇类溶剂，毒性小，成本低廉。

The prepared composite film adhesive can use the alcohol as the main solvent and has the advantages of little toxicity and low cost.

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性能：在煤焦系，酯类溶剂﹑节油﹑物油中完全溶解，不溶于醇类溶剂，在石油系溶剂中部分溶解。

Properties: Completely dissolved in solvent such as coal tar system, esters, turpentine and plant oil. Undissolved in solvent such as alcohol and partly dissolved in oil.

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