交联改性苯乙烯-丙烯酸酯树脂纸张表面施胶增强剂的制备及应用

摘要

Styrene acrylic emulision was prepared from styrene, butyl-acrylate, N-methylolacrylamide and acrylamide using polyvinyl alcohol as dispersing agent. Water-dispersible polyisocyanate was obtained from HDI trimer and MPEG500. The paper surface strength agent was prepared by the combination of the styrene acrylic emulision with water-dispersible polyisocyanate. Moreover, the applied properties of the paper were measured as follows when the dosage of the strength agent was 1％: ring crush index of paper increased by 23.4％, paper tensile strength increased by 34.0％, and tearing strength and picking velocity increased by 38.6％ and 30.4％ respectively, the sizing value reached 57s.%以苯乙烯、丙烯酸丁IR,N-羟甲基丙烯酰胺、丙烯酰胺为原料,用聚乙烯醇(PVA)作为胶体保护剂,采用无皂乳液聚合方式,制备苯乙烯-丙烯酸酯树脂乳液.同时以HDI三聚体与聚乙二醇单甲醚500(MPEG 500)为主要原料制备水分散聚异氛酸酯交联剂.用苯乙烯一丙烯酸酯树脂乳液与亲水改性聚异氛酸酯复合,制备纸张表面施胶增强剂.应用试验表明,制备的增强剂对提高纸张表面性能较有效果:表面施胶增强剂用童为1%时,纸张的环压强度提高23.4%,拉伸强度提高34.O%,撕裂度提高38.6%,拉毛强度提高30.4%.施胶度可达57s.