外墙乳胶漆配方设计中透水性能的提升策略

研究了成膜体系、助剂体系和无机填料对乳胶漆透水性能的影响。结果表明：成膜体系方面,使用小粒径乳胶,提高乳胶用量并搭配少量的蜡乳液、提高成膜助剂用量可有助于改善涂层的成膜效果,进而改善透水性;助剂方面,使用铵盐分散剂替代钠盐分散剂、使用更低HLB值的润湿剂、使用疏水改性聚氨酯增稠剂替代碱溶胀增稠剂,并加入少量的遮盖聚合物,均有助于改善透水性;无机填料方面,使用粗细搭配的填料体系,并尽可能使用片状填料,也可一定程度改善透水性。根据实验结论和总结的涂膜透水及改进模型,可为乳胶漆透水性能的提升给出配方优化建议,并验证了改良后的配方能够有效降低涂膜的透水量,使其达到外墙面漆合格品的指标,可为低成本、低透水的外墙乳胶漆配方设计提供思路。     

涂料业的发展应重在提高质量

业内人士分析,我国涂料企业要在涂料配方、工艺上狠下功夫,在质量上努力赶超世界名牌,并利用价格优势,争回应有的涂料市场份额.涂料目前以乳胶漆为主,无论什么品牌的乳胶漆都是由乳液、颜料、填料、助剂4个主要部分构成.乳液质量最好的品种为纯丙烯酸酯乳液,价格为12000元/吨;颜料最好的品种为进口金红石钛白粉,价格为16000元/吨;填料价格很低,助剂虽贵但用量极少,所以填料、助剂在涂料中占成本比例较小.如果使用质优的乳液及颜料、填料和助剂     

颜填料对乳胶漆光泽影响的研究

颜料和填料作为乳胶漆的重要组成部分，对乳胶漆光泽有直接影响，研究了颜料体积浓度，填料类型及其用量对乳胶漆光泽的影响，试验发现，使用粒径大，粒径分布广和吸油量小的填料，乳胶漆光泽下降明显：同时还发现，在颜料体积度一定的条件下，增加填料用量，会降低乳胶漆光泽，遮盖力和耐洗刷性等性能。     

水性彩瓦乳胶漆的研制与生产

介绍水性彩瓦乳胶漆试制的全过程,其工艺特点是将所用颜料、填料粉未先制成颜料浆、填料浆。在配制彩瓦漆时,直接在成膜乳液中加颜料浆、填料浆及助剂,经分散过滤即得成品,因此,本文突出了水性颜料浆的制备,并详细介绍了对分散剂的选择试验。     

绿色环保外墙乳胶漆透水性能研究

以丙烯酸乳液、颜填料、助剂、水、成膜助剂等环境友好型原材料制备了一种绿色环保外墙乳胶漆,简单介绍了外墙乳胶漆透水性检测方法,重点讨论了乳液类型、填料、助剂等对外墙乳胶漆透水性能的影响。     

影响内墙乳胶漆耐擦洗性能的因素

对内墙乳胶漆的配方进行了研究,讨论了不同乳液、颜填料、成膜助剂和分散剂等市售产品对内墙乳胶漆耐擦洗性能的影响。结果表明,硅丙乳液的耐擦洗性能最好,纯丙和苯丙乳液次之,醋丙乳液较差。金红石型钛白粉比锐钛型钛白粉的耐擦洗性能好,但其成本较高。重质碳酸钙的粒径越小,涂膜的耐擦洗次数越少。体质颜料的用量过少,会影响漆膜的遮盖力和机械性能;用量过多,则漆膜易粉化,从而影响耐擦洗性能。成膜助剂可以显著改善漆膜的耐擦洗性能,市售成膜助剂醇酯12和巴斯夫7034分散剂的耐擦洗性能较好。     

金属防锈乳胶漆的研制

金属防锈乳胶漆是一种乳胶型防锈涂料。它以水为介质、以苯乙烯和丙烯酸酯单体共聚乳液为成膜物质,与防锈颜料、体质填料和各种涂料助剂相混合,配制而成水性防锈乳胶漆。它具有安全、无毒、无污染等特性,主要用于钢铁等金属构件表面的防锈和装饰。本文论述了金属防锈乳胶漆研制试验过程,确定了最佳试验配方和制漆工艺,并进行了涂料性能测试。     

新型外墙乳胶漆的研制

根据乳胶漆的组成成分及在配方中起的作用，进行了外墙乳胶漆的配方设计研究，讨论了乳液、粉料以及助剂例如填料、膨润土、增稠剂、成膜助剂、分散剂以及消泡剂等对外墙乳胶漆性能的影响，确定了乳胶漆的最佳配方。     

低VOC净味内墙乳胶漆的探讨

通过对乳胶漆诸组分乳液、助剂、颜填料的分析,发现乳液、成膜助剂、pH调节剂既是乳胶漆气味的主要来源,又是VOC的主要来源。配制低VOC净味内墙乳胶漆时应考虑这些组分的影响,由此可制得综合性能优良的乳胶漆。     

成膜条件对乳胶漆耐洗刷性能的研究

成膜条件是影响乳胶漆成膜过程和涂膜性能的重要因素。成膜助剂可以改善乳胶漆的成膜过程，提高乳胶漆的涂膜性能。本文研究了成膜助剂，成膜温度和成膜时间对乳胶漆耐洗刷性能的影响。发现使用成膜助剂可以显著改善乳胶漆的耐洗刷性能，提高干燥温度和延长干燥时间可提高乳胶漆的耐洗刷性能。     

低成本铁红水性防锈涂料的制备

介绍了以氧化铁红为体质防锈颜料、磷酸锌和氧化锌为化学防锈颜料、红云母为片状颜料,苯丙乳液为基料的水性防锈涂料的制备。对影响其性能的因素进行了分析,并与溶剂型防锈涂料进行了性能对比。     

水性纳米改性苯丙防锈底漆的研制

本试验选用无皂聚合工艺制备的水性苯丙防锈乳液为基料,氧化铁红与三聚磷酸铝组成防锈体系,添加纳米SiO_2浆料,制备的水性纳米改性苯丙防锈底漆性能达到溶剂型醇酸防锈涂料的水平,并分析了乳液、防锈颜料、纳米SiO_2对水性苯丙防锈底漆性能的影响。     

双组分水性环氧防腐涂料的研制

采用水性环氧树脂乳液作为环氧防腐涂料基料,水性改性胺作为固化剂,低铅含量防锈颜料、环保型助剂等配制成双组分水性环氧防腐涂料。该涂料达到溶剂型环氧防腐涂料的理化性能要求,同时VOC低,符合国家强制性标准可溶性重金属的限量要求,适用于对环保要求严格的工业钢结构防腐领域。     

建筑反射隔热保温涂料的研制

介绍了以有机硅改性丙烯酸乳液为基料,不透明聚合物、空心微珠和红外辐射功能颜填料制备建筑反射隔热保温涂料的工艺技术,研究了几种功能颜填料及涂料体系的PVC值对涂料隔热保温性能的影响,乳液T_g值及阻燃剂对涂料耐沾污性和阻燃性能的影响。     

Effect of particle size distribution on stress development and microstructure of particulate coatings

The role of pigment particle size distribution on stress and microstructure development was studied for coatings prepared from aqueous suspensions of ground calcium carbonate (GCC) and latex binder. Stress development was monitored using a modified beam deflection technique under controlled environment. Microstructure was characterized by scanning electron microscopy (SEM) and cryogenic SEM. For coatings containing only GCC particles and no latex, a wide particle size distribution resulted in a significant particle size gradient in the cross-sectional microstructure and irregular stress development. With latex addition, uniform microstructures were observed in coatings with either wide or narrow GCC particle size distribution. GCC/latex coatings prepared using GCC with a wide particle size distribution developed a higher stress than those prepared using GCC with a similar average particle size but a narrow particle size distribution. The higher stress is related to the particle packing that results in smaller pore sizes and larger capillary pressures that drive compaction. In coatings prepared with the same GCC particles but different latex binders, the stress and cracking behavior of the coating depends on the latex properties.     

新一代高性能外墙弹性抗污涂料的研制

通过选择优质的紫外光固化交联弹性乳液为基料,合理搭配颜填料及助剂,研制出具有高弹性和优异的耐沾污的弹性涂料。     

Relationship between surface chemistry and surface energy of different shape pigment blend coatings

The influence of pigment shapes and pigment blends on the surface energy was investigated and compared with the surface chemistry of pigmented latex coatings. The coatings were made of different volume ratios of two pigments: plate-like kaolin clay pigment and prismatic precipitated calcium carbonate (PCC) pigment. These were mixed together with carboxylated styrene–butadiene–acrylonitrile latex (SBA), and applied over nonabsorbent substrates as well as absorbent substrates. The composition of the surface of the coatings was investigated by X-ray photoelectron spectroscopy (XPS). Two approaches were used to estimate the total surface energy and the components of the coatings: a conventional approach—“the Kaelble approach”—and a more modern approach—“the van Oss approach.” Pigment blends with different shapes and increments caused a change in the surface chemistry and the surface energy of the latex coatings. As the prismatic PCC pigment particles increased in the kaolin/SBA coating system, the SBA latex content at the coating surface increased and the total surface energy of the coating decreased. This is valid for both nonabsorbent as well as absorbent substrates. It was found that there was a strong correlation between the surface energy and the surface composition. The surface energy of the coatings estimated by the Van Oss approach was always lower than that estimated by the Kaelble approach. Colloidal interactions between pigment–pigment and/or pigment–binder were thought to play an essential role in determining the final coating surface energy and its components. Changes in the surface latex content and the surface energy due to the different pigment blends investigated were found to fit straight-line equations.     

The influence of substrate absorbency on coating surface chemistry

The composition of the top surface of a coating layer can influence its functional properties or subsequent processing steps. The effect of the substrate absorbency on the coating surface chemistry is reported. Different coating systems containing a kaolin clay pigment, fine or coarse precipitated calcium carbonates, and a common latex binder were examined. The influence of a soluble polymer added into the coating was characterized. The surface chemistry was measured with attenuated total internal reflectance (ATR) and X-ray photoelectron spectroscopy (XPS).

Absorbent substrates generate bulky coatings with high voids and low gloss. Rapid dewatering by the absorbent substrate pulls the small particles, like latex binder, away from the top layers causing a low latex concentration at the surface. On non-absorbent substrates, the addition of the soluble polymer generates coating layers with higher void volume, lower gloss, and lower latex concentrations at the coating surface. However, on absorbent substrates, polymer addition causes coatings with lower void volumes and higher gloss. In this case, the rapid dewatering and mobility of particles is reduced by the polymer, which helps to retain the small particles at the surface. As a result, latex concentration at the surface increases with polymer addition on absorbent substrates.     

调温调湿抗菌内墙涂料的研制

以零VOC丙烯酸乳液为成膜物,以钛白粉为白色颜料,以硅藻土和定型相变储能材料为填料,以纳米TiO2/ZnO为抗菌剂,在多种助剂的配合下制备的内墙涂料,其涂膜具有自动调温、调湿、杀菌等环保、保健、节能功能。     

无泡型高PVC内墙乳胶涂料

在分析了乳液、分散剂、润湿剂、消泡剂、颜填料、增稠剂等对高PVC涂料性能影响的基础上,研制出一种消泡性能良好、且经济的高PVC内墙乳胶涂料。