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中文摘要：
以苯乙烯、丙烯酸丁酯、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氰酸酯交联剂。用苯乙烯-丙烯酸酯树脂乳液与亲水改性聚异氰酸酯复合,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：表面施胶增强剂用量为1%时,纸张的环压强度提高23.4%,拉伸强度提高34.0%,撕裂度提高38.6%,拉毛强度提高30.4%。施胶度可达57s。
英文摘要：
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.
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