在不添加乳化剂的条件下,采用同时滴加盐酸(HCl)和聚乙烯醇(PVA)-正丁醛(BA)混合胶液,通过新型高效混合分散机制合成了聚乙烯醇缩丁醛(PVB)。研究结果表明:合成PVB的最佳工艺条件是m(BA)∶m(PVA)=0.60∶1、初始反应温度为30℃、pH为1.4左右、反应时间为2.5h和升温速率为10K/20min(最高至65℃);此时,BA利用率超过99%,并且PVB的透明度(超过96%)和雾度(低至0.2%)完全满足夹层安全玻璃的使用要求。 Under the condition of not adding emulsifier, polyvinyl butyral was synthesized by a new type of high efficient mixing and dispersing mechanism by using hydrochloric acid (HCl) and polyvinyl alcohol (PVA) -butyraldehyde (BA) PVB). The results showed that the optimum conditions for the synthesis of PVB were m (BA): m (PVA) = 0.60:1, initial reaction temperature 30 ℃, pH 1.4, reaction time 2.5h and heating rate 10K / 20min (Up to 65 ° C); at this point BA utilization exceeds 99% and PVB transparency (over 96%) and haze (down to 0.2%) fully meet the requirements of laminated safety glass.