阴离子分散松香胶中性施胶的研究

介绍了采用实验室制备的一种特殊的阴离子分散松香胶NL01进行中碱性条件下施胶实验的有关情况,结果表明;pH值6．0－8．5的范围内,采用NL01能获得良好的施胶效果,并且相对传统强化松香胶而言,其消耗硫酸铝的量降低了约80％。NL01中性胶对碱性填料碳酸钙的相容性良好,在用量达到15％时,仍有相当不错的施胶度,而且突破了传统的“阴离子分散松香胶－硫酸铝体系不可用于中性施胶”的观念。     

松香施胶体系下无水、半水石膏晶须用于瓦楞纸加填对比研究

研究对比了松香胶-硫酸铝施胶体系下，半水、无水两种石膏晶须用于瓦楞纸加填时对纸张施胶和强度性能的影响，发现以阴离子分散松香胶对加填石膏晶须瓦楞纸进行施胶时，采用先加硫酸铝后加松香胶的逆向施胶工艺，比采用先加松香胶后加硫酸铝的正向施胶工艺施胶效果更好；瓦楞纸生产中加填石膏晶须基本不会影响阴离子分散松香胶的应用效果，对于无水石膏晶须加填纸张，阴离子分散松香胶的最佳用量在3%左右，而对于加填半水石膏晶须纸张施胶剂最佳用量为2%,且相比半水石膏晶须加填纸张在最佳施胶剂用量下有更好的抗水性能；在较低阴离子分散松香胶用量时，施胶剂添加对加填石膏晶须纸张强度影响较小，甚至对半水石膏晶须加填纸张而言，其抗张及耐破强度还有一定改善，但之后随着松香胶用量的进一步增加，加填两种石膏晶须纸张的强度性能呈明显下降趋势。     

国内信息

阳离子分散松香胶的研制及应用探讨了阳离子化剂的选择以及阳离子分散松香胶制备工艺,并进行了应用试验。结果表明,该阳离子分散松香胶,可在近中性条件下抄纸,能容忍一定量的碳酸钙碱性填料存在,与普通皂化胶相比,可节约胶料及硫酸铝用量４０％以上。（禾山摘自《中...     

ER－892高分散松香胶的制备和应用研究

介绍了高浓度、高分散松香胶的制备和应用方法．研究结果表明：该胶游离松香含量高，乳液粒径细，施胶能力强，可减少松香和硫酸铝用量５０％～６０％，克服夏季施胶障碍，提高纸张理化性能．     

分散松香胶技术

一、概述分散松香胶是一种新型造纸施胶剂,用来代替传统松香皂胶进行施胶,一般可降低松香用量40～60％,硫酸铝20～70％,增白剂50％,使抄造可以在较高pH值下进行提高成纸强度、白度、施胶度等理化指标。     

分散松香胶技术

一、概述分散松香胶是一种新型造纸施胶剂,用来代替传统松香皂胶进行施胶,一般可降低松香用量40％～60％,硫酸铝20％～70％,增白剂50％,使抄造可以在较高pH值下进行提高成纸强度、白度、施胶度等理化指标。     

松香基水性聚氨酯施胶剂的制备及其应用

以马来松香、聚乙二醇和2,4-甲苯二异氰酸酯为主要原料,以酒石酸为亲水单体,KH550作封端剂和改性剂,制备仿中性高分散松香化聚氨酯施胶剂。借助水性聚氨酯乳液,无需像其他松香胶还额外加入其他乳化剂如司盘、吐温等系列;制备的水性松香基聚氨酯乳液可直接自身离子化,形成高分散乳液。针对乳液和纸张进行FT-红外光谱、SEM等结构表征。结果表明,KH550已接枝到WPU体系中,乳剂稳定性良好,纸张拒水性显着提高。借用阴离子水性聚氨酯,可以实现松香胶浆内施胶和表面施胶双重应用。     

催化剂及助剂

道纯化工最新推出低泡型分散松香胶 郑州市道纯化工技术公司继首推分散松香胶后再次推出低泡分散松香胶。该分散松香胶采用高分子聚合物代替传统的乳化剂,因此泡沫极小,施胶性能更佳,有利于提高纸机车速、纸张匀度和强度。其产品各项指标和性能均已达到或超过国外同类产品水平。同时其制造成本较阳离子分散松香胶更低,更适合我国国情,是我国造纸企业向中性抄造过渡的质优价廉的原料。     

松香施胶剂的中性化研究现状及发展趋势

综述分散松香胶在中性条件下施胶中松香改性、松香乳化剂、松香助留剂的制备和选择。着重介绍高分子松香乳化剂、高分子助留剂     

松香施胶剂的中性化研究现状及发展趋势

综述了为实现分散松香胶在中性条件下施胶而在松香、松香乳化剂、松香助留剂方面进行的改进研究。并对技术比较前沿的高分子松香乳化剂、高分子助留剂进行了系统介绍。     

Laponite and PAS costabilized ASA emulsion with high hydrolysis resistance and sizing efficiency

ASA emulsions costabilized by Laponite and polyaluminum sulfate (PAS) were prepared by homogenizing the mixture of ASA and aqueous dispersion of Laponite and PAS. The properties, sizing performance and hydrolysis resistance of the prepared ASA emulsions, were investigated in this article. The results show that the introduction of PAS significantly improves the stability, hydrolysis resistance, and sizing performance of ASA emulsions. The ASA emulsion stabilized by 0.5% of Laponite (based on total mass of emulsion) and 2% of PAS (based on the mass of Laponite) shows high hydrolysis stability and high sizing efficiency on bleached chemi‐thermomechanical pulp. At the addition level of 0.3% based on bleached chemi‐thermomechanical pulp, the sizing degree of ASA‐sized paper can be as high as 120 s. Even when the storage time of the ASA emulsion exceeds 3 h, its sizing performance is hardly changed. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013     

烷基烯酮二聚体(AKD)中性施胶剂的研究进展

介绍了国内外烷基烯酮二聚体(AKD)中性施胶剂的发展情况,并对AKD的合成原理(脂肪酸的酰氯化和脂肪酸的脱氯化)、施胶机理、影响AKD施胶效率的因素(乳液存放时间和条件、纸张类型、pH值和总碱度、Zeta电位、填料以及其他添加剂等)和AKD的改性等进行了综述。     

无皂马来酸酐-苯乙烯-丙烯酸酯乳液施胶剂的研究

以马来酸酐(MAH)、苯乙烯(St)和丙烯酸丁酯(BA)为共聚单体,以过硫酸钾(KPS)/亚硫酸氢钠为氧化还原型引发剂,采用无皂种子乳液共聚法合成了一种阴离子型乳液施胶剂;然后将该施胶剂与氧化淀粉复配制成施胶液。讨论了反应条件对乳液稳定性及施胶液应用性能等影响。结果表明:制备施胶剂的较佳反应条件为m(MAH)∶m(St)∶m(BA)=1.7∶5.7∶4.3、n(KPS)∶n(亚硫酸氢钠)=3∶2且w(KPS+亚硫酸氢钠)=2.5%、反应温度68~75℃和反应时间6 h;该施胶剂的玻璃化转变温度(Tg)为39.02℃和105℃;将该施胶液用于纸张表面施胶时,其纸张施胶度比原纸提高了4倍,其纸张平滑度、耐破度及张力等比纯淀粉施胶液分别提高了89%、17%和58%。     

用于PVC原位聚合改性的纳米碳酸钙乳液的制备及其性能

比较了聚乙烯醇、十二烷基苯磺酸钠、聚丙烯酰胺、乳化剂TY-01作为纳米碳酸钙的乳化剂时的乳化效果;选用乳化剂TY-01时,确定了其最佳用量以及搅拌、超声波振荡的工作参数;研究了乳化液固含量对黏度和pH值的影响;通过投射电镜观察了纳米碳酸钙的分散情况。结果表明：①4种乳化剂中,乳化剂TY—01的乳化效果最好,其与纳米碳酸钙的最佳质量比为1：20;②配制乳化液时,搅拌转速应大于800r／min,提高搅拌转速、进行超声波振荡可以缩短搅拌时间;③随着乳化液固含量的增加,乳化液的pH值基本不变,乳化液黏度急剧增大;④添加乳化剂的纳米碳酸钙在水中分散均匀,且粒度均匀,平均为50nm。     

中空聚合物乳液的制备及其性能研究

以甲基丙烯酸甲酯(MMA)、丙烯酸(AA)、丙烯酸丁酯(BA)、丙烯腈(AN)和苯乙烯(St)为共聚单体,过硫酸铵(APS)为引发剂,十二烷基硫酸钠(SDS)和非离子型乳化剂(OP-10)为阴/非离子型复合乳化剂,采用种子乳液聚合法和碱溶胀后处理法制备了P(MMA/AA/BA)为核、P(St/AA/AN)为壳的纸张施胶用中空聚合物乳液。研究结果表明:当w(引发剂)=0.80%、m(SDS)∶m(OP-10)=2∶1和w(乳化剂)=1.5%时,中空乳液的综合性能较好,其单体转化率较高、乳液黏度适中、粒径较小且分布较窄。     

纳米苯丙阳离子乳液型纸张表面施胶剂

以苯乙烯、丙烯酸丁酯为主单体,加入少量的自制阳离子Gemini乳化剂,分别采用单体半连续滴加法、间歇式加料法、单体全滴加加料法合成黏度小、固含量为30％的稳定的纳米阳离子聚合物乳液,并直接用于纸张表面施胶,施胶效果好,为开拓微乳液在造纸施胶剂中的应用提供了有价值的理论根据.     

Preparation and performance of nano‐SiO2 stabilized Pickering emulsion type sizing agent for glass fiber

The nano‐SiO₂ particles modified by silane coupling agent A‐1100 were used for preparing the vinyl ester resin (VE) Pickering emulsion. The stable emulsion could be served as the film former of sizing agent for glass fiber (GF). The influence of the wettability and the addition amount of nano‐SiO₂ on the stability of film former emulsion was explored. The effect of nano‐SiO₂ Pickering emulsion type sizing agent on the properties of GF was investigated. SEM images show that there existed a layer of sizing agent film with nano‐SiO₂ particles evenly on the GF surface. The abrasion resistance of the sized GF reached 3,579 times and the stiffness was 69 mm. The strand integrity also performed well. The fracture strength of GF bundles treated by Pickering emulsion type sizing agent increased by 28.6% to 0.504 N/Tex compared with that of the unsized GF bundles. The interlaminar shear strength (ILSS) of GF/VE composites sized by self‐made sizing agent which contained nano‐SiO₂ has improved, compared to the unsized GF reinforced VE composite. POLYM. COMPOS., 37:334–341, 2016. © 2014 Society of Plastics Engineers     

Aminated poly‐N‐vinylformamide as a modern retention aid of alkaline paper sizing with acid rosin sizes

Partially aminated poly‐N‐vinylformamides (APNVF) were prepared by the hydrolysis of PNVF and used as the retention aid of rosin size. The dual retention aids system, consisting of this modern polymer and aluminum sulfate (alum) for neutral‐alkaline paper sizing using acid rosin sizes, was evaluated by experiment. The results indicated that APNVF was very effective and a small amount of the polymer used together with alum considerably increased the size retention and sizing degree of paper under neutral‐alkaline conditions. The cationic charge density of APNVF significantly influenced the sizing efficiency of the rosin sizes. Furthermore, the retention of alkaline filler CaCO₃ and paper strength were improved by the polymer addition. It is clear that the polymer can be used as a multifunctional additive for papermaking. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 1805–1810, 2000     

淀粉接枝共聚物瓦楞纸表面施胶增强剂的制备及其应用

利用无皂乳液聚合技术通过阳离子淀粉和苯乙烯(St)、丙烯酸丁酯(BA)等乙烯基单体进行接枝共聚反应,制备了一种淀粉接枝聚合物乳液,并对其表面施胶性能进行了研究。结果表明:当m(淀粉接枝乳液)∶m(氧化淀粉)=3∶100、w(硫酸铝)=0.4%和施胶液pH=4时,其应用效果好且性价比高;淀粉接枝乳液的施胶性能优于氧化淀粉和接枝单体共聚物。     

低成本大比表面积γ-Al2O3的制备

以廉价无机铝盐硫酸铝为原料,氨水为沉淀剂,十二烷基硫酸钠为添加剂,采用简单沉淀法制备得到较大比表面积γ-Al₂O₃。通过N₂低温物理吸附-脱附、X射线衍射、红外光谱、热重、元素分析、扫描及透射电镜等,研究制备过程中沉淀温度、溶液pH值和添加剂用量对产物γ-Al₂O₃及其前驱体的晶相结构、形貌织构等性质的影响。结果表明,在沉淀温度75 ℃、硫酸铝浓度0.25 mol·L^-1、溶液pH=9.0、老化时间12 h和n(十二烷基硫酸钠)∶n[Al₂(SO₄)₃]=0.375∶1条件下,所得前驱体(拟薄水铝石)经600 ℃焙烧后,可获得大比表面积(416.65 m²·g^-1)γ-Al₂O₃,并且样品中因十二烷基硫酸钠添加,引入的S及Na等杂质含量极少。