聚乙烯醇缩甲醛的缩醛度过大的再生处理

Regeneration of the Over - condensed Poly vinyl Formal

根据在酸性介质中羟醛缩合反应是可逆的原理,对聚乙烯醇缩甲醛的制备过程中出现的凝胶进行再生处理,减少了原料浪费。经处理后的产品能够达到产品质量指标的要求。

In accordance with the princiole that in acid media the condensation reaction of hydroxylaldehyde is inversible, a way is given for the regeneration of the gel formed in the process of preparing polyvinyl formal. Thus, the raw materials can be economized and the products can reach the standard of quality.