流变助剂对膨胀型钢结构防火涂料性能的影响

以溶剂型丙烯酸树脂及氯化石蜡为基料,多聚磷酸铵、季戊四醇和三聚氰胺为膨胀体系,通过不同温度下炭层质量保持率、炭层强度、膨胀倍数、炭层形貌、耐火时间等考察了不同类型的流变助剂对防火涂料性能的影响。结果表明：流变助剂对膨胀型钢结构防火涂料性能的影响非常大。聚酰胺蜡、水合硅酸镁类流变助剂对体系的炭层强度、膨胀倍数、耐火性能等基本无影响;改性水合硅酸镁可以提高防火涂料的耐火时间和炭层强度;亲水气相二氧化硅会导致炭层膨胀倍数和耐火时间增加,同时会降低炭层强度,导致炭层易脱落;疏水二氧化硅、改性蒙脱石类流变助剂会抑制膨胀发泡、提高炭层强度,同时会大幅度降低耐火时间。分析探讨了不同类型流变助剂对防火涂料的性能影响的机理。不同流变助剂在高温膨胀发泡过程中主要影响体系的熔融黏度和膨胀倍数,从而影响防火涂料的综合性能。     

水性无机富锌涂料助剂的筛选及其对涂料性能的影响

研究了水性无机富锌涂料中,润湿分散剂、流变助剂、附着力促进剂、防锈助剂的筛选及其相互作用对涂料体系分散程度稳定性及涂膜重防腐性能的影响。试验结果显示:分散剂、流变增稠剂的选择对涂料的抗沉降性、贮存稳定性有很大影响;偶联剂的选择添加对涂膜附着力、耐盐雾等性能提高有很大帮助;高性能防腐助剂石墨烯的添加对涂膜耐盐雾性能有质的提高。     

水性涂料流变助剂的作用机理及研究进展

介绍了水性涂料中流变助剂的种类、分子结构以及在体系中的增稠机理,以此探讨不同的流变助剂对涂料流变特性的贡献。并阐述了流变助剂作用于水性涂料的影响因素及相关的研究进展。     

水性木器涂料用助剂

从消光剂、润湿流平剂、漆膜手感剂、消泡剂。流变助剂几个方面对助剂在水性木器涂料中的应用以及对水性木器涂料性能的影响进行了探讨。     

流变助剂对高极性溶剂型涂料性能影响研究

考察了8类典型的流变助剂对环氧和聚氨酯2种高极性溶剂型涂料的黏度、抗流挂性能、光泽和贮存稳定性等产生的影响。发现在环氧涂料体系中,有机膨润土、粉末聚酰胺蜡、聚乙烯蜡和活性碳酸钙4种流变助剂对涂料的黏度、抗流挂性、防沉性和触变性都具有较好的作用;在聚氨酯体系中,流变助剂有机膨润土、聚酰胺蜡、改性脲溶液对涂料的黏度、抗流挂性都具有较好的作用;有机膨润土对防沉性的贡献较小;表面改性碳酸钙和气相二氧化硅会降低涂膜的光泽;各种流变助剂对聚氨酯体系触变性的影响差别均不大。     

论水性木器涂料配方助剂的搭配选择

从水性木器涂料体系的成膜助剂、流变助剂、p H值调节剂、流平剂及其他助剂的选择,来论证一种较佳的水性木器涂料配方方案,从而使水性木器涂料的性能可媲美溶剂型产品。     

缓蚀颜料复合型水性环氧富锌涂料的制备与应用

利用缓蚀型磷酸盐类颜料复配锌粉,制备了一种新型水性环氧富锌涂料.通过研究缓蚀型颜料的种类及用量,分散剂、流变助剂和附着力促进剂等助剂对富锌涂料相关性能的影响,对涂料配方进行优化.结果表明:选用BYK-2055作为分散剂,1.25％的气相二氧化硅A200和1％的膨润土828作为流变助剂,用9％防锈颜料三聚磷酸铝复配65％...     

水性涂料天然流变改性剂瓜尔胶的应用研究

对天然流变改性剂瓜尔胶在水性涂料中的应用性能进行了研究,结果表明:瓜尔胶作为水性涂料的流变助剂产品性能均符合国家标准,因此,瓜尔胶可代替传统的羟乙基维素(HEC),而且具有明显的价格优势,生产成本低.     

塑胶用水性银粉涂料

从配方设计的角度,介绍了水性银粉涂料配方的构成框架和基本知识;通过成膜助剂、流变助剂的选择分析了如何提升体系的物化性能,对普通塑胶用涂料的研发有实际的借鉴作用。     

聚酰胺蜡对水性聚氨酯面漆性能的影响

以水性聚氨酯面漆为研究对象,考察了3种聚酰胺蜡流变助剂对水性聚氨酯面漆的黏度、抗流挂性、贮存稳定性、涂膜流平性和光泽的影响。结果表明:在该体系中,3种聚酰胺蜡流变助剂的使用均可以明显地使涂料拥有更好的流变性能,得到黏度合适、抗流挂性较好、贮存稳定的涂料。其中针对本面漆体系,流变助剂AQ-600的作用效果最明显,得到的样品及涂膜的性能指标最好。     

Impact of bio-based binders on rheological properties of aqueous alumina slurries for tape casting

This work describes the preparation of concentrated alumina suspensions based on bio-sourced additives with a low environmental impact and with the rheological properties adapted to the tape casting process. Natural polysaccharides extracted from plants and fruits (pectin, psyllium…) were characterized (molar weight) and identified as promising binders for substituting the classical organic binders from petrochemical industry. The rheological behavior of the additives and of the suspensions containing these bio-sourced additives was studied in flow and in oscillations. The mechanical properties of the green tapes obtained with the different bio-sourced binders were determined from tensile experiment. This paper studies the relations between the nature of the binder, the rheological behavior of the suspension, the ability to tape cast the suspensions and the final properties of the green and sintered tapes.     

Thermomechanical properties of bitumen modified with crumb tire rubber and polymeric additives

In this paper, the influence of some additives on the rheological and technological properties of crumb rubber modified binders has been studied. The research has been mainly focused on the degree of bitumen modification, measured as the improvement of the mechanical properties, produced by the additives used, and the storage stability of these binders at high temperature. The experimental results obtained reveal that all the polymeric additives used yield an improvement in both rheological and technological properties of the binder. The storage instability of these binders has been associated to sedimentation processes of insoluble CR particles that strongly influence the mechanical properties of the binder. The additives and processing conditions selected in this study do not completely prevent problems associated with the poor stability of CRMBs during storage at high temperature. Nevertheless, the use of polyoctenamer, FT-wax or SBS-containing additives improves CRMB stability. In this sense, similar loss tangent values were found before and after hot storage of these binders.     

水煤浆添加剂研究评述

水煤浆成浆怀、流变性及静动态稳定性除了与煤质本身的性质密切相关外，还与添加剂的性能有关。８０年代以来，国外在水煤浆添加剂方面做了大量的研究工作研制及筛选聘批性能优良的分散剂及稳定剂。但是，到目前添加剂的研制剂的分子结构特征与煤质及煤表面物理化学性质有着密切的相关性，深入研究这种匹配规律，并建立相应的数据库，将会发迹以往水煤浆添加剂研制中的经验性，对添加剂的研制起理论指导作用。本文国内外水煤浆添加剂     

Effect of Rhelogical Additives on Application properties of Paints

The influence of rheological additives with thickening, thixotropic and flow improving action on rheological properties of the chosen types of synthetic enamels under the conditions near to the application ones by brushing was studied. Obtained rheological parameters were compared with the results of technological semisubjective methods of sagging and levelling evaluation. This comparison enabled to determine composition and viscosities of systems with optimal application properties.     

Evaluation of Some Nonionic Surfactants Derived from Tannic Acid as Additives for Water‐Based Mud

Water‐based mud is the most‐used mud for oil and gas exploration and is generally considered to be more environmentally friendly than oil‐based or synthetic‐based mud. Therefore in this study we focused on water‐based mud and a series of nonionic surfactants derived from tannic acid was evaluated as additives for water‐based muds. The rheological properties for formulated water‐based muds contain nonionic additives at different temperatures were investigated including: apparent viscosity, plastic viscosity, yield point, gel strength, thixotropy and filtration properties. In addition to the relation between shear stress and shear rate were presented at different temperatures. The results of the studied nonionic surfactant showed improvements in the rheological properties when used as additives for water‐based mud formulation.     

The influence of additives on the flow behavior of ABS

The flow and processing behavior of commercial plastics is determined not only by the characteristics of the base resin but also by the presence of additives of various kinds. In this study the influence of a number of additives on the rheological behavior of molten ABS was investigated using a capillary extrusion rheometer and a Weissenberg rheogoniometer. The additives studied included molding lubricants, rubber impact modifiers, flame-retardant additives, and residual unreacted components remaining from the polymerization process. The mechanisms by which these species affect flow characteristics are described.     

润滑脂流变性影响因素研究现状

润滑脂由于其复杂而独特的流变性能,近年来受到了学界的广泛关注。学者们选用一系列流变参数来定性定量描述润滑脂的流变性能。润滑脂组分、工作条件及制备手段的变化常常会影响和改变润滑脂的流变参数。综述了温度,稠化剂结构、含量及粒度,基础油,添加剂及填料,制备条件,微观结构等因素对润滑脂流变参数的影响情况,总结了润滑脂流变学发展中存在的问题,并对润滑脂流变学未来的发展进行了展望。     

Eco-friendly alumina suspensions for tape-casting process

The aim of this study is focused on the elaboration of new bio-based alumina concentrated suspensions with rheological properties adapted to the tape casting process and with low environmental impact. Natural polymers extracted from plants were identified as promising candidates in order to substitute the classical organic additives. The aqueous suspensions were prepared from bio-polymer additives. The interactions between different organic additives with alumina were characterized by zeta-potential and quartz crystal microbalance measurements. The influence of the incorporation order of the different organic additives on the viscosity of the suspension was evaluated. Then, mechanical properties of the green and sintered tapes were determined in relation with the nature of bio-polymer additives.     

乳胶漆流变性与施工飞溅性初探

初步探讨了流变助剂品种和用量及不同的组合对醋丙、苯丙、纯丙乳胶漆黏度和抗飞溅性的影响。     

流变剂对环氧树脂涂料性能的影响研究

研究了纳米凹凸棒、绢云母、硅微粉、膨润土4种流变助剂对热固性环氧树脂涂料的流变性能、涂膜耐化学介质性能、力学性能和干燥性能的影响。研究表明：不同助剂对于同种涂料增黏效应的次序为：纳米凹凸棒〉膨润土〉绢云母〉硅微粉,各流变助剂的有效增黏范围和相应黏度的变化范围分别为纳米凹凸棒1％～5％和3．1～24．0Pa·s、膨润土2％～5％和2．8～6．2Pa·s、绢云母1％～5％和2．8～6．2Pa·s、硅微粉2％～5％和2．8～4．8Pa·s;在各类流变助剂的有效增粘范围内,不同助荆对涂膜耐化学介质性的影响次序依次为：绢云母〉硅微粉〉纳米凹凸棒〉膨润土;同时,还讨论了不同助剂对涂膜的抗冲击性能、附着力、硬度、干燥时间的影响。