共查询到19条相似文献,搜索用时 178 毫秒
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通过使用非离子型乳化剂和阴离子型乳化剂组成的复合乳化剂和保护胶体,利用各反应物中丙烯酸酯,叔碳酸乙烯酯憎水性强、抗剪切强度好和较好的内增塑作用的特性,以丙烯酸酯、叔碳酸乙烯酯、醋酸乙烯酯为反应单体进行聚合,采取对混合单体先预乳化后滴加,控制反应过程的方式,制得丙-叔-醋多元共聚乳液,以其为基料,根据乳胶漆的生产需要,加入各种填料和助剂,制成乳胶漆,产品具有良好的耐水、耐酸碱和耐擦洗性,满足优质乳胶漆的应用性能要求。 相似文献
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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。 相似文献
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摘要用叔碳酸乙烯酯(Veova10)单体对醋酸乙烯酯乳液进行改性,采用种子聚合的方法,以过硫酸钾为引发剂,使用阴离子和非离子复配的乳化剂,加入一定量的丙烯酸酯类单体,可制得耐碱性、耐水性、耐候性都非常好的乳液。此共聚乳液特别适合用作内墙和外墙乳胶漆的基料。 相似文献
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制备有机硅-丙烯酸丁酯-醋酸乙烯酯三元共聚乳液。研究了有机硅、丙烯酸丁酯、醋酸乙烯酯、乳化剂含量、乳化剂配比、引发剂含量、保护胶体对乳液聚合和性能的影响,并确定了它们的最适宜条件。结果表明该共聚乳液具有良好的耐水、耐侯、耐酸碱、耐污染和稳定性能。该三元共聚醋丙乳液能良好应用于制备普及型内墙建筑涂料。 相似文献
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用少量的叔碳酸乙烯酯(VV10)单体与醋酸乙烯酯(VAc)进行乳液共聚改性,通过Fox公式计算,可以设计和控制单体共聚的比例以得到玻璃化温度合适的共聚物乳液。由于叔碳酸乙烯酯侧链上有较大的基团,具有较强的空间位阻效应,阻止了其他基团对聚合物的进攻,可大大提高共聚乳液的耐水性、耐碱性;由于其侧链上烷基的稳定性,可提高聚合物的抗紫外线性和抗氧化能力,同时采用预乳化合成工艺,实现乳液粒径和粒径分布的优化控制。此共聚乳液特别适合用作内墙乳胶漆的基料。 相似文献
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低成本有机-无机复合型内墙涂料的研制 总被引:1,自引:0,他引:1
本研究通过向涂料中引入硅溶胶,使用聚乙烯醇和膨润土作为增稠剂,优选填料,并通过试验合理配合,可使涂料中的某些助剂的使用量减少,并解决了高颜料体积浓度内墙乳胶涂料的常见问题,得到水稀释性能稳定、流平性好和涂膜手感光滑的新型内墙涂料。介绍了原材料、工艺、涂料性能和某些因素对涂膜耐洗刷性、对比率、流平性和涂膜手感的影响。 相似文献
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Latex particle size and CPVC 总被引:3,自引:0,他引:3
Monodisperse vinyl acetate/butyl acrylate (85/15) latexes were prepared with particle sizes between 200 and 1200 nm. These were used in a simple paint formulation with TiO2 as the only pigment. Two optical methods were used for determination of the critical pigment volume concentration (CPVC) of these paints. These are specular gloss at an incidence angle of 85 ° and CIE Z (lightness) values of a blue tinted formulation. Both methods gave coincident results for the CPVC as a function of latex particle size. Our data fit the expression X = 1.44Y2.65 where X = number of latex particles/number of pigment particles, at CPVC and Y = diameter of pigment particles/diameter of latex particles. Earlier, Bowell reported the same exponential relation, with a different pre-exponential factor, for acrylic latexes. The common exponent is explained with a model in which the latex and pigment particles assume a condition close to minimum porosity during packing. CPVC reflects the packing of particles during the initial stages of dryness of the latex. The ‘universal’ relation reported here permits facile prediction of the effects of latex particle size on the CPVC and binding capacity in water-based paints. 相似文献
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Wenjun Wu Steve Severtson Christopher Miller 《Journal of Coatings Technology and Research》2016,13(4):655-665
Alkali-soluble resins (ASRs) are a special type of polymeric surfactant containing both hydrophobic moieties and carboxylic acid functional groups. Upon ionization, ASRs provide electrosteric stabilization to the latex particles, thus allowing reduction or even elimination of conventional surfactants while maintaining or improving latex stability. The distribution of ASR in the dried film depends on its miscibility with the latex polymer. Its presence in the blend system is expected to alter the film formation process and consequently performance properties of paint products based on the latex blends containing ASR. In this study, the effects of a high Tg, alkali-soluble resin (ASR), poly(styrene/alpha-methylstyrene/acrylic acid) terpolymer on the properties of latex and paint films were examined. The film formation of a soft acrylic latex in the absence and presence of the ASR was evaluated using a variety of analytical techniques. As expected, paint properties such as scrub resistance, wet adhesion, and block resistance were also affected by the inclusion of ASR. The results provide new insights into the structure and surface morphology of latex and paint films containing ASRs, as well as their impact on mechanical and the performance properties. 相似文献