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以丙烯酸(AA)为功能单体、苯乙烯(St)为硬单体、丙烯酸丁酯(BA)为软单体、聚乙烯醇(PVA)为保护剂和分散剂,根据明胶在酸性溶液中呈阳离子的特点,采用无皂种子乳液聚合法制备核/壳型明胶接枝共聚物乳液施胶剂。采用单因素试验法优选制备施胶剂的最佳工艺条件,并对施胶剂的理化性能和应用性能进行了研究。结果表明:当m(明胶):m(AA):m(St):m(BA):m(PVA)=3:0.5:6:4:0.25、w(引发剂)=5%和反应温度为85℃时,明胶接枝共聚物乳液施胶纸的应用性能接近甚至超过进口同类产品,其耐水性明显优于原纸(两者水接触角分别为104°、73°)。
With acrylic acid (AA) as functional monomer, styrene (St) as hard monomer, butyl acrylate (BA) as soft monomer, polyvinyl alcohol (PVA) as protective agent and dispersant, according to the gelatin in acidic solution It has the characteristics of cationic. The core / shell gelatin graft copolymer emulsion sizing agent is prepared by soap-free seed emulsion polymerization. The best preparation conditions of sizing agent by single factor experiment method were studied, and the physical and chemical properties and application properties of sizing agent were studied. The results showed that when m (ge): m (AA): m (St): m (BA): m (PVA) = 3: 0.5: 6: 4: 0.25, w (initiator) = 5% and reaction temperature When 85 ℃, the application performance of gelatin graft copolymer emulsion sizing paper is close to or even surpass that of imported similar products, and its water resistance is obviously better than that of base paper (the water contact angles of the two are 104 ° and 73 °, respectively).