【摘要】 <正> 一、前言聚乙烯醇缩醛(包括缩甲醛、缩乙醛、缩丁醛和缩甲乙醛等)是一类有重要实用的高分子材料。由于其价格低廉,原料丰富,近年来在建筑涂料、粘合剂等方面得到广泛应用。作为涂料、粘合剂的聚乙烯醇缩醛,影响其性能的一项最重要指标是缩醛度,而产更多还原

【Abstract】 The calculation of aldehyde amountand determination of acetal level inthe production of polyvinyl acetalpaints and adhesives are desc ribed.The calculation formulas ared erivedin detail,The methods of ca lculatingthe amount of aldehyde and analyzingthe acetal level are featur ed bytheir simple practice, high ac curacyand reproducibility to meet theprodution requirements.更多还原