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采用常压逆转工艺,以甲基丙烯酸-β-3-羟丙酯基三甲基氯化铵(DMHC)为自乳化阳离子单体、苯乙烯(St)为亲油单体、丙烯酰胺(AM)为亲水单体和羟甲基丙烯酰胺(NMAM)为交联剂,经氧化-还原引发共聚,然后加入松香,借助于反应形成的阳离子无皂苯丙乳液作分散乳化剂,制得阳离子苯丙共聚物分散松香胶。结果表明:当pH值为6～6.5、w[助留剂Al2(SO4)3]=0.5%、w[阳离子聚丙烯酰胺(CPAM)]=0.2%和w(阳离子分散松香胶施胶剂)=1.2%(相对于干浆料而言)时,将此阳离子分散松香胶应用于混合浆抄纸体系中,采用逆向施胶,纸张施胶度达84s,环压指数达7.36N·m/g,较空白样提高了17.7%。
Using the method of atmospheric-pressure reversal, using DMHC as self-emulsifying cationic monomer, styrene as oleophilic monomer, acrylamide (AM ) Is a hydrophilic monomer and methylol acrylamide (NMAM) as a cross-linking agent, initiated by oxidation-reduction copolymerization, and then added rosin, with the aid of the reaction of the cationic soap-free styrene-acrylic emulsion as a dispersed emulsifier to prepare a cation Styrene-acrylic copolymer dispersed rosin gum. The results show that when w [retention agent Al2 (SO4) 3] = 0.5%, w [cationic polyacrylamide (CPAM)] = 0.2% and w (cationic disperse rosin gum sizing agent) = 1.2% (relative to the dry pulp), the cationic dispersed rosin was used in the mixed pulp papermaking system. The size of the paper was 84s and the pressure index was 7.36N · m / g, a 17.7% increase over the blank sample.