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1标准适用范围的界定内墙涂料通常以水性涂料为主,水性内墙涂料根据成膜物质类型又可分为以各类合成树脂乳液为成膜物的乳胶漆和以聚乙烯醇缩甲醛为成膜物的水溶性涂料(俗称107涂料、803涂料等)。目前大量用于室内装饰用的乳胶漆是以各类合成树脂乳液为成膜物的水性涂料,是在20世纪中叶发展起来的一种环保型产品,是水性化涂料的典型代表。由于它以水为分散介质,采用对人体无害的原料作为成膜物,相对于溶剂型涂料乃至绝大多数装修材料来说,水性乳胶漆是对人体健康影响极小的产品,是涂料产品的发展方向,自问世以来以无毒、… 相似文献
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水性涂料的技术课题与展望 总被引:3,自引:0,他引:3
水性涂料的技术课题与展望一、前言为消除涂料对环境的污染并保证其使用的安全性,必须实现涂料的水性化,这种必要性的提出由来已久。水性涂料按其实用化的情况分成如下四类:必须水性化的涂料;以实现水性化为有利的涂料;为适应法规要求可能水性化的涂料;采用现有技术... 相似文献
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以无机一有机复合黏结剂为胶凝材料;以钠水玻璃、氢氧化钠、水制作碱性激发剂,以粉煤灰、纳米二氧化硅、膨胀蛭石、膨胀珍珠岩、渗透结晶母料为复合填料;以铝粉、氢氧化铝等为多功能助剂的配合下,合成了隧道防火涂料。各项技术指标达到、超过了现行“隧道防火涂料技术指标要求”,表明了地质聚合物枉隧道防火涂料中应用的可行性及优越性。 相似文献
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环境保护型涂料用添加剂1.前言以环境保护为主要目的的涂料有高固体份涂料、无溶剂涂料、粉末涂料、永性涂料、紫外线固化徐料等。与传统的溶剂性徐料相比,这些徐料所含树脂分子量较低。有富于极性的倾向。因此,也必须选择与之极性相匹配的添加剂。特别是分散剂、消泡... 相似文献
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我国是一个涂料消费大国,尽管目前我国人均消费涂料的水平比较低,但是消费市场潜力巨大。目前,国内外大部分涂料市场都被含有石油化工成分的溶剂型涂料所占有,其他的新型涂料市场份额较小。以天然植物草本涂料为例,由于其涂膜性能与传统溶剂型涂料尚有差距,成本也偏高,加之国内天然植物草本涂料行业的研发生产厂家各行各道,各自发展,没有形成行业配套的体系,因此,尚未实现规模化生产。 相似文献
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通过引入纳米材料来提高墙体涂料的保温性能,以不同的硅酸盐纳米材料、碳酸盐纳米材料为主要材料,通过配方及工艺的优化开发出了内墙纳米保温涂料。对所得保温涂料进行了性能袁征,如涂料的结构、微观形貌、耐洗刷性能、导热系数、施工性、干燥时间、稳定性、耐水性、耐碱性等。 相似文献
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热喷涂喷焊层的抗磨性研究 总被引:3,自引:0,他引:3
热喷焊和热喷涂技术被广泛用于机件的耐磨强化,按涂层材料和工艺和不同会得到不同组织和性能的涂层,研究评价这些涂层在磨粒磨损和冲蚀磨损中的抗磨能力及规律性,可为工程应用提供一定的指导。 相似文献
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空心砖芯具是空心砖成型模具的关键部件,在空心砖挤出成型过程中芯具承受着剧烈的磨粒磨损,以芯头和芯杆的磨损最为严重。本文通过对5种不同材料制作的芯头进行砂浆磨损试验,比较得出不同芯头材料之间的耐磨性能,提出对芯头和芯杆制作材料的改进措施,从而有效的提高芯具的使用寿命。 相似文献
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Utilization and value addition of copper tailing as an extender for development of paints 总被引:1,自引:0,他引:1
The present study deals with characterization of copper tailing waste, test for possibilities of hazards and its potential reuse as an extender in paints. The waste is a siliceous material containing aluminum oxide, iron oxide and sulphate in significant concentrations. In the primary stage waste is acidic in nature, which makes it unsuitable for paint. This acidity is removed from the waste by simple sieving and grinding. The prepared mass was characterized for basic properties of an extender like oil absorption, specific gravity, pH, etc. Toxicity studies were also conducted in term of leaching of heavy metals by standard techniques (USEPA using TCLP). Properties of the prepared paint's film in terms of hardness, adhesion, resistance to abrasion, resistance to impact, resistance to corrosion (under humidity and salt fog), etc. were evaluated and compared with a similar formulation of conventional extender and found satisfactory. Results from the experiments indicated that developed extender is environmentally clean and cost-effective. 相似文献
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以上海大众联合发展有限公司动力总成分公司所生产的再制造发动机为例,分析了该产品的失效形式、材料性能与再制造之间的关系。结果表明:磨损导致的失效经过再制造切削加工后,配合新的尺寸零件,保证原有的公差配合,可以使磨损失效完全消除,但材料疲劳累积引起的损伤并没有得到修复,经过一次再制造的发动机与新发动机的疲劳寿命有明显差异。 相似文献
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论述了丙烯酸改性醇酸树脂和热变色材料的制备方法,并将热变色材料分散于丙烯酸改性醇酸树脂中,制备出丙烯酸改性醇酸树脂热变色涂料.结果表明:所得的丙烯酸改性醇酸树脂热变色涂料的性能优良,受热变色效果明显. 相似文献
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A new method for determining the flexibility of paints and other coatings has been developed. Coated aluminium strips are stretched and the damage caused to the coating during stretching is monitored by means of an automatic image processing system. The stretching device, with a lighting and camera system specially designed to withstand cold conditions down to ?25°C, gives useful information about the performance of coatings in cold climates. In addition to the elongation at which the paint film starts to crack, the development of cracking is also measured. A reduction in the test temperature was found to impair the flexibility properties of paints. Ageing can either impair or improve the flexibility properties of paints. The effect depends on the pain and the weathering time. 相似文献
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《Materials Science & Technology》2013,29(4):337-343
AbstractThe general problems involved in the production of precision optical components are discussed with reference to plastics. The methods available for the manufacture of plastic optical parts are reviewed with particular reference to injection moulding. The design and manufacture of injection moulds are considered, and ways in which dimensional and surface finish requirements may be achieved are given. The criteria for producing optimum quality mouldings are listed, and the role of modern microprocessor controlled machines in producing quality moulded parts is emphasized. Methods for improving surface abrasion resistance and minimizing reflections are described. The optical, mechanical, physical, and processing properties of the plastics most favoured for optical components are given.MST/375 相似文献