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雾霾已严重影响了人们的生活,其中挥发性有机化合物(VOC)则是产生雾霾的主要原因之一.文中从原料选择、配方设计等方面阐述如何制作低VOC水性内墙装饰涂料.选择醋丙乳液作为成膜物质,不加任何高沸点成膜助剂,并选用不合烷基酚聚氧乙烯醚(APEO)和溶剂的助剂,以多功能添加剂取代丙二醇,杜绝涂料原材料中VOC的来源.同时对产品进行耐洗刷性能测试、涂料涂覆后的漆膜表观效果测试和低温稳定性测试,各种性能均能满足市场的需求. 相似文献
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4 关于VOC
4.1 VOC定义
挥发性有机化合物(VOC)的定义:1)美国ASTM D3960-1998《涂料及相关涂层中挥发性有机化合物含量测定的标准实施规范》标准定义挥发性有机化合物为任何能参加大气光化学反应的有机化合物;2)美国联邦环保署(EPA)定义为挥发性有机化合物是除CO、CO2、H2CO3、金属碳化物... 相似文献
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一、环境因素加速涂料工业的变革虽然同温层中的臭氧层能滤除日光中的强烈紫外线,对人类起着重要的保护作用,但地面上空气中的臭氧却有伤害人的肺部组织及使农业减产的不良影响。据美国环保局估计,美国大约有1/3的人口生活在空气臭氧含量高于安全水平(0.12ppm)的环境中。这一过高浓度的臭氧来源于由汽车燃料和涂料排放的大量挥发性有机化合物(VOC)的复杂光化学反应。 相似文献
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在雾霾频发的现在,探讨如何通过发展低挥发性有机化合物(VOC)涂料产品和改进喷涂工艺,来降低涂料涂装中VOC排放对于大气污染的影响。结合大气污染防治法等法规对VOC的控制要求,探讨涂料行业的发展。 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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D. G. Gordeev L. F. Gudarenko M. V. Zhernokletov V. G. Kudel’kin M. A. Mochalov 《Combustion, Explosion, and Shock Waves》2008,44(2):177-189
A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation
of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from
the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO2) of density 0.08 g/cm3.
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Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
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塔设备改造选型的分析 总被引:2,自引:0,他引:2
就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。在评述目前国内常用的几种塔板和新型填料之后,着重介绍一种新型塔板(导向梯形浮阀塔板)和一种新型填料(波环填料——乾隆帕克)。 相似文献
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Jorge Marcelo Romero Soledad Bustillo Hugo Enrique Ramirez Maisuls Nelly Lidia Jorge Manuel Eduardo Gómez Vara Eduardo Alberto Castro Alicia H. Jubert 《International journal of molecular sciences》2007,8(7):688-694
A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out. 相似文献
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In the present article, chitin from crab shell was systematically deacetylated using a NaOH treatment with control of the reaction time. The degree of deacetylation, monitored using solid-state NMR, revealed that the reaction was pseudo-first order. Based on this, swollen and NaOH-saturated particles are proposed as the reaction system. The weight loss of the partially saponified and neutralized samples after HCl hydrolysis increased linearly with the degree of deacetylation. The crystallinity of the samples was found to increase after acid hydrolysis. According to conductimetric titration, the surface charge density of the crystallites, after acid hydrolysis, was found to increase with base treatment time. The effect of surface charge on the formation of a chiral nematic phase, due to the rodlike nature of the crystallites, was explored. These results show that because the contribution of charged particles to the ionic strength was significant the double layer compression was affected, especially since the surface charge density was close to the Manning limit. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65:373–380, 1997 相似文献
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徐善明 《现代塑料加工应用》2008,20(5)
应用管理学和市场营销学的基本原理和方法,深入分析我国聚丙烯工业的内部和外部环境、市场状况以及加入WTO后所面临的机遇与挑战.在此基础上,应用SWTO(态势分析法),确认出主要的优势和劣势、机会和威胁,对我国聚丙烯工业的国际竞争力进行结构化的综合分析. 相似文献
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