双子型表面活性剂涂易乐(ToynolTM)研磨分散剂在颜料研磨中的应用

本文介绍了双子基表面活性剂涂易乐(ToynolTM)DS-136在分散酞菁蓝、耐晒红、美国卡博特炭黑中的应用,并与国外同类产品进行性能比较。试验证明,涂易乐分散剂可以取得更好的研磨分散效果,具有更高的研磨分散效率;用量较少,色浆稳定性好;在研磨过程中可以获得更低的体系粘度;属于低泡分散剂;具有很好的颜料润湿性能等。     

水性涂料用非离子型聚氨酯分散剂

通过引入带有强吸附作用的锚基基团和具有较好亲水性的聚合物链段,自行开发了具有润湿和分散作用的非离子型水性聚氨酯分散剂。结合不同表面能的颜料对其进行分散试验,并给予粘度、外观、流动性及稳定性的性能评价,指出颜料与分散剂之间通过范德华力结合在一起,通过亲水链段提供的熵斥力达到有效稳定的水性涂料分散体系。     

环保体系氧化铝注凝浆料的黏度及稳定性研究

注凝成型工艺是一种新型近净成形技术,其关键在于低黏度、高稳定性、高固含量浆料的制备。基于此,本研究以琼脂糖为交联剂制备水基无毒体系的氧化铝注凝浆料,研究了聚丙烯酸钠分散剂和柠檬酸分散剂的含量、浆料pH值及粘结剂聚乙烯醇的含量对浆料粘度和悬浮稳定性的影响。研究结果表明:聚丙烯酸钠分散剂比柠檬酸分散剂有更好的分散效果,当聚丙烯酸钠的添加量为1.0 wt%、浆料pH=8、聚乙烯醇含量为2 vol%时,浆料具有最佳的性能。将所配制的浆料注入模具后,可得复杂形状的素坯。     

水性印刷油墨在纺织品涂料印花中的应用

在水性印刷油墨中加入假塑性增稠剂、聚合物乳液、柔软剂和润湿分散剂等组份后,可将其用于纺织品涂料印花。实验结果表明,增稠剂、聚合物乳液、柔软剂和润湿分散剂的加入可以改善印花清晰度和抑制渗扩,提高印花的干、湿摩擦牢度,改善柔软度,提高体系的稳定性和皂洗牢度。但各组分的用量必须适当,否则会产生花型不完整、鲜艳度下降、手感变差、摩擦牢度和皂洗牢度下降等负面效果。     

顺醋共聚乳液粘合剂

合成树脂乳液是白色粘绸状的水分散体系,树脂以极小的颗粒在水中呈悬浮分散状态。其特点是树脂含量高,粘度低,不使用有机溶剂和在技术应用过程中无社会公害,以及产品使用简单方便,性能可靠,这是合成树脂乳液得以迅速发展的主     

国外文摘速报

20050601颜料分散用胺改性树脂或胺改性烷烃基聚合物片段 欧洲专利局专利申请EPl364701，2003—11—26． 该专利介绍了用一种或多种胺改性树脂或胺改性烷烃基聚合物片段分散颜料的方法、包含胺改性树脂或胺改性烷烃基聚合物片段的分散剂、含这类分散剂的洗液（用挤水法生产颜料时使用的洗液）、浓加工颜料浆以及在涂料或油墨中的应用。     

赢创推出轮胎用高效分散剂

<正>据行业期刊介绍,德国赢创工业集团日前推出了一种高效分散剂,这款高效分散剂可简化轮胎胶料的混炼过程,改善难混聚合物的分散程度,在降低胶料粘度的同时,保持硫化胶良好的动态性能不受影响。据了解,这种分散剂可明显缩短混炼周期,并     

水性木器涂料用有机硅改性苯丙乳液的合成与性能研究

采用半连续乳液聚合法合成了高固含量、低黏度水性木器涂料用核壳结构苯丙乳液,讨论了交联单体的选择和用量、硬单体(St/MMA)比例、聚合物结构对乳液性能的影响。然后通过有机硅改性丙烯酸乳液,考察了有机硅添加量对乳液性能的影响,并探讨了粒子结构对水性木器涂料用苯丙乳液成膜体系的影响。以FT-IR表征了合成的苯丙乳液的结构,表明所得聚合物结构是按设计合成的,以DSC测试了树脂的玻璃化温度,与设计值相近,以SEM表征了乳液的粒子形态,结果表明在乳液中乳胶粒以均一的粒径均匀分散。     

高固含量低粘度丙烯酸酯乳液合成的研究

高固含量低粘度（300-1000mPa.s）聚合物乳液具有生产效率高,运输成本低,干燥快,能耗低等优点。本文对获得高固含量,低粘度的丙烯酸酯乳液的实验方法做了大量的研究和论述,对乳液合成的影响因素做了深入的分析和讨论。     

国内外文摘速报

20050601颜料分散用胺改性树脂或胺改性烷烃基聚合物片段欧洲专利局专利申请EP1364701,2003-11-26.该专利介绍了用一种或多种胺改性树脂或胺改性烷烃基聚合物片段分散颜料的方法、包含胺改性树脂或胺改性烷烃基聚合物片段的分散剂、含这类分散剂的洗液(用挤水法生产颜料时使用的洗液)、浓加工颜料浆以及在涂料或油墨中的应用。20050602含金属醇螯合物的U V屏蔽涂料的制备日本专利公开JP2003096392,2003-04-03.题述涂料是一种含金属(例如:钛酸、硅酸、锆酸或锡酸等)的乙二醇螯合物溶液以及醇溶性含螺环吡喃的甲乙酮(或丙酮乙酸酯)溶液的混…     

Effect of dispersant on the rheological properties and slip casting of concentrated sialon precursor suspensions

The ability of Hypermer KD1 to disperse high solids loading reaction sialon suspensions for slip casting has been characterised. It has been found to be a very effective dispersant in organic media of 60-vol.% MEK and 40-vol.% Ethanol, yielding fluid and highly homogeneous suspensions. The effects of added amounts of KD1 have been observed through adsorption data, sedimentation tests and rheology measurements. KD1 imparts low viscosity and stability to the suspension. It has been found that 3-wt.% addition of KD1, based on the weight of reaction sialon powders, results in a very stable and high flowable suspension with near Newtonian flow behavior. Less amounts of dispersant lead to unstable suspensions with obvious shear thinning flow behaviors, while adding excessive dispersant leads to high viscosities, especially at high solids loading. Measuring the pore size distribution of green bodies from different suspensions has proved the effects of dispersant amounts on dispersing the slurries and on slip casting performance.     

Lead Zirconate Titanate Particle Dispersion in Thick-Film Ink Formulations

Diverse device applications for lead zirconate titanate (PZT) ceramics in thick-film form are currently in active development. In the present study, the particle dispersion properties of thick-film ink formulations containing PZT powder have been determined using rheological measurements. Although all of the eight commercially available dispersants tested are more effective than the terpineol solvent alone in decreasing attractive interparticle forces in suspensions, the best dispersant identified for hard and soft PZT powders is a phosphate ester oligomer. This dispersant is extremely efficient, and its use in thick-film ink formulations results in viscosity decreases of 50% at low shear rates (10 s⁻¹) and 30% at high shear rates (100 s⁻¹) compared with current ink formulations containing no dispersant. The effects upon rheology of the order of addition of components in the processing of inks have been studied, with the most effective processing route using a fugitive solvent that probably facilitates uniform coverage of the particle surfaces by the dispersant molecules. Modeling of the rheological profiles of inks indicates that the use of a dispersant decreases the depth of the primary minimum in the interparticle potential by a factor of 3. Demonstrated advantages of the use of a dispersant in PZT thick-film inks include improved microstructural homogeneity in the green body and the ability to formulate printable inks with higher solids loadings. No adverse effects of the dispersant upon the dielectric and piezoelectric properties of bulk PZT samples are found following burnout and sintering.     

色素炭黑润湿分散剂的选择

通过几个平行实验,对比了不同种类的润湿分散剂对色素炭黑的润湿分散效果、储存稳定性以及防浮色发花性,从中筛选出效果较好的分散剂。并从高分子吸附形态、高分子化合物浓度、溶剂、酸/碱基、粒子表面形态等对分散剂在颜料表面的吸附的影响进行了分析。结果表明,用带有颜料亲和基团的高分子量嵌段封闭共聚物和不饱和多元羧酸的多元胺聚酰胺结构的炭黑润湿分散剂研磨炭黑色浆效率高,细度下降快,研磨的色浆储存性好,黑度高,防浮色发花性好,在炭黑润湿分散方面取得了良好的效果。     

水性油墨分散技术研究进展

结合国内外研究现状,对水性油墨的分散稳定机制、影响分散性的主要因素进行了综述分析,分析表明:颜料自身的可润湿性、粒径及粒径分布、树脂的特性、油墨的黏度及p H值都与水性油墨的分散性密切相关。在此基础上,阐述了提升分散性及分散稳定性的主要途径,包括对颜料进行表面改性处理、使用表面活性剂或超分散剂、设计颜料表面形貌及进行颜料预分散。并提出:随着国家产业调整的进一步深入,环保型水性油墨必将逐步取代传统溶剂型油墨,进一步提升水性油墨的质量已是当务之急。     

Inter-particle interactions of alumina powders in UV-curable suspensions for DLP stereolithography and its effect on rheology,solid loading,and self-leveling behavior

For the UV-curable alumina suspensions used in digital light processing (DLP) stereolithography, optimizing the dispersant type is important for achieving low viscosity, high solid loading, and remarkable self-leveling behavior. However, the inter-particle interactions in UV-curable alumina suspensions dispersed using different dispersants are overlooked. Herein, the effect of inter-particle interactions on rheology, solid loading, and self-leveling behavior of UV-curable alumina suspensions was systematically investigated. Three different commercial dispersants were used: oleic acid (OA), alkane-acrylic phosphate ester (PM1590), and copolymer dispersant (BYK111). After dispersing, BYK111 endowed alumina powders with thicker adsorption polymer layer to provide stronger steric repulsion force and facilitated better wetting of alumina powers in the photocurable resin, resulting in a reduced network structure degree, which decreased the viscosity (1.04 Pa s at 30 s^?1); homogeneous packing of alumina powders, which enhanced the maximum solid loading (55 vol%); and inhibition of particle flocculation, which facilitated the spontaneous spreading of suspension.     

交联改性苯丙乳液在水性油墨中的应用

分别以邻苯二甲酸二烯丙酯(DAP)、杂环甲基丙烯酸酯单体(TRM WAM Ⅲ)和乙酰乙酸基甲基丙烯酸乙酯(AAEMA)作为传统苯丙乳液的交联改性剂,采用预乳化半连续乳液聚合法制备交联改性苯丙乳液;然后以此为连接料,制备水性油墨.研究了传统苯丙乳液、交联改性苯丙乳液以及进口同类产品对水性油墨的摩擦牢度、稳定性能和耐水性能...     

Print quality and resistance for water-based flexography on polymer-coated boards: Dependence on ink formulation and substrate pretreatment

The performance of water-based acrylic flexographic inks laboratory printed on three different polymer-coated boards, namely coated with LDPE, OPP and PP, have been analysed and interpreted. The print quality and resistance properties obtained were related to varying ink formulation, in particular choice of emulsion polymer and presence of silicone additive in the vehicle, as well as varying levels of corona pretreatment. Print mottle and adhesion were worst on PP, while wet (water) rub and scratch resistance were worst on OPP and PE, respectively. However, these properties could be greatly influenced by the ink formulation, more so than corona level. In general addition of silicone improved scratch resistance, due to reduction in polar energy component of the print surface, but at the expense of worsened wet rub resistance. The emulsion polymer giving best resistance performance was generally found to give poorest optical properties, presumably due to more limited resolubility on press.     

Fluid-dynamic properties and wetting behavior of coating inks for roll-to-roll production of polymer-based solar cells

In the last decade, semiconducting and conducting materials were developed that can be processed by solvent-based deposition to form functional layers or complete electronic devices. These materials are typically synthesized in laboratory scale quantities and tested on small spin-coated substrates, whereas the final goal is to produce them on flexible substrates in a continuous roll-to-roll process. To enable a fast scale up and optimization, fluid-dynamic properties have to be known. Here, we present viscosity and surface tension data for typical material systems, applied in polymer-based solar cells. Materials presented include water-based polymer dispersions (hole-conducting and high-conductive PEDOT:PSS types), solvent-based anorganic nanoparticle dispersions (silver nanoparticle ink, hole-blocking ZnO nanoparticle ink), and dissolved organic molecules and polymers (P3HT:PCBM photoactive blend). Predictive models are proposed to approximate viscosity and surface tension for these materials at various compositions. As well, corona treatment is used to modify the surface energy of P3HT:PCBM and described as a function of web speed and corona power. The importance of material properties is demonstrated by predicting stable conditions for a slot-die coating process. A simple drying simulation highlights the possibility of using property models to investigate wetting problems.     

表面活性剂对水性油墨干燥速度的影响

色浆研磨时的分散剂用量和成墨过程中润湿剂的用量对水性油墨的干燥速度有较大影响。用量适当可提高干燥速度;若用量不当,不但降低干燥速度,而且将影响水性油墨的粘度、细度和附着牢度。     

高光含氟外墙乳胶漆的研制

介绍了一种高光含氟外墙乳胶漆的研制方法,并从涂料各组分的角度阐述了润湿分散剂、增稠剂、顔填料、乳液等对光泽和其他性能的影响。筛选出高光含氟外墙乳胶漆所需的原材料,对含氟乳液的性能进行分析和概括,开发出成本低、性能好,用于建筑外墙的高光含氟外墙乳胶漆。多次优化配方,以实际检测和应用情况为基础,提供稳定性好、容易调色的外墙高光含氟乳胶漆生产配方。为研制高光、环保、高性能的建筑外墙用高光含氟外墙乳胶漆提供设计思路和理论依据。