低残余醛的聚乙烯醇缩丁烯醛的制备与应用  

Preparation and application of poly(vinyl butenal) with lower free aldehyde

作　　者：郭立强[1] 苏涛[2] 

机构地区：[1]南通纺织职业技术学院,江苏南通226007 [2]广西大学化学化工学院,广西南宁530004

出　　处：《中国胶粘剂》2010年第5期39-42,共4页China Adhesives

摘　　要：以聚乙烯醇(PVA)和丁烯醛为主要原料,合成了聚乙烯醇缩丁烯醛(PVBE)。讨论了反应时间、丁烯醛用量、HCl含量和PVA浓度等因素对PVBE黏度的影响。结果表明:200 mL PVA(质量浓度大于5%)溶液中加入0.75～1.5 mL的HCl,当丁烯醛用量(ρ)在0.15～0.25之间,通过调节以上因素,室温反应120～216 h可制得适宜黏度的PVBE水溶液;同时介绍了PVBE中去除残余醛的两种方法;最后研究了低残余醛PVBE作为增稠剂、保护胶体在聚醋酸乙烯(PVAc)乳液中的应用。With polyvinyl alcohol（PVA） and crotonaldehyde as raw mail materials,so a poly（vinyl butenal） （PVBE） was synthesized. The efftct factors of reaction time, crotonaldehyde content, HCl content and PVA concentration on PVBE viscosity were discussed.The result showed that 200 mL PVA （mass concentration is bigger than 5%） in the solution by adding 0.75-1.5 mL HCl,when crotonaldehyde content（p） was 0.15-0.25 ,by adjusting these factors, the reaction time of 120-216 h can be obtained suitable viscosity of PVBE aqueous solution at room temperature, and two methods that removed free aldehyde of PVBE were introduced. Finally,application of PVBE as thickener and protective colloid in polyvinyl acetate（PVAc） emulsion was studied.

关 键 词：聚乙烯醇缩丁烯醛 胶粘剂 增稠剂 保护胶体 

分 类 号：TQ314.24[化学工程—高聚物工业]