测定水性涂料中VOC的几点建议

不同标准和测试方法会引起VOC值的差异 ,针对水性涂料的特点 ,对影响VOC测定的因素作了试验 ,提出测试步骤和合理方法 ,并统一计算方法 ,消除这些差异     

涂料中VOC检测方法的影响因素及水分测定的探讨

室内装饰装修材料有害物质限量国家强制性标准的实施，已引起装饰装修材料生产企业、消费者及相关各方的强烈响应。消费者在选购装饰装修材料时，首要考虑的条件之一就是选购的材料有害物质是否满足标准要求。装饰装修材料生产企业，也迅速做出积极回应，生产符合     

关于水性涂料中有机挥发分(VOC)测定方法的讨论

论述了国家标准 (GB 1 85 82 -2 0 0 1 )、行业标准 (HBC 1 2 -2 0 0 2 )在VOC含量的计算以及测试方法的差异 ,VOC的测定偏差 ,标准的适用范围。介绍国外检测低VOC涂料的方法标准 ,并利用ISO、DIN标准方法对低VOC含量的涂料进行测试比较。     

气相色谱法测定水性涂料中的VOC

基于250℃沸点的VOC定义,介绍了用气相色谱法从定量及定性分析测定水性涂料中VOC质量分数的方法。结果表明,该法方便、快捷、准确性高。     

水性涂料中VOC的危害与控制

分析了水性涂料中VOC的危害程度,提供了水性涂料降低VOC的方法,并初步探讨了这些方法有可能带来的缺陷和解决手段。     

国家标准中水性涂料VOC测试方法和计算方法比较

介绍了国家标准中水性涂料产品的VOC测试方法和计算方法,并进行比较。     

水性涂料VOC含量测定中水分含量测量方法对比

归纳了水性涂料VOC含量的限量值,讨论了水性涂料VOC含量的测定方法,对VOC含量测定中测水分含量的两种测定方法——卡尔·费休法和气相色谱法的精密度和准确度进行了考察。试验表明,卡尔·费休法的精密度和准确度不及后者。     

超低VOC水性环氧丙烯酸墙面涂料面世

上海广毅涂料有限公司的重大科研开发项目——“超低VOC含量绿色环保型水性环氧丙烯酸内、外墙墙面漆”生产新技术，近日通过上海市化工产品质量监督检测中心历时40天的检测鉴定。     

建筑涂料VOC含量检测方法研究进展

介绍了我国已建立的墙面涂料、防水涂料、地坪涂料和功能性涂料四大类建筑类涂料VOC检测方法和限值标准体系,指出了现有标准体系存在的问题以及需完善之处。只有建立科学严谨的检测方法才能开展准确的检测工作,才能为涂料VOC管控提供有价值的科学依据。     

Improvements in the application properties of water-based low VOC coatings

Conclusions  This paper discusses a new class of acrylic latex (NeoCryl TX200) in which the colloid stabiliser is designed to interact with titanium chelates such as Tilcom AT23, thereby building up a weak gel structure which can be broken down by shear. This class of latex can be formulated with associative thickener (and their blends) in conjunction with titanium chelates, thus providing considerable formulation flexibility which cannot be achieved with conventional surfactant stabilised acrylic latex. A key feature of this new class of latex is that the colloid stabilisation system does not introduce water sensitivity, and indeed wet adhesion characteristics are fully comparable to those of state of the art adhesion promoted latexes. A further benefit of this class of latex is that of increased open-time, arising in part from its intrinsic rheological characteristics, and in part from the high film build achievable with thixotropic formulations. Rheological measurements show that introduction of titanium chelates greatly increases the low shear-rate viscosity of the system, and vane rotor measurements show that there is a near linear dependence of gel strength with titanate concentration. This gel, which is responsible for preventing in-can settlement of pigments and good brush pick-up, is partially broken down by the action of brush dripping, and is completely broken down during application (eg by brush or spray). The structure subsequently builds up with time, with gelation occurring in as little as 5–10 minutes, but with full recovery of gel strength taking in the region of 10–12 hours. The titanate chelating agent, even at high concentrations, does not contribute to the high shear-rate viscosity of the system, this being controlled by the addition of associative tickeners, either alone or in combination. The associative thickener(s) also control the low shear-rate viscosity during the period in which the gel structure has been sheared out, and thus good flow and levelling properties can be obtained through the optimisation of associative thickener type(s) and concentration(s). Although, as might be expected, cosolvents affect the rheological properties of formulations containing both associative thickener and titanium chelate, this effect is not a large one, and can be readily taken into account during formulation design.     

英国联合胶体化学公司水性涂料助剂概述

联合胶体（A．C）公司创立于1935年，是一家历史悠久专门生产丙烯酸类聚合物的著名公司，涉及行业主要有矿砂处理、石油业、污水处理、纺织化工、涂料工业、农业化工和精细化工等。涂料化工方面，联合胶体公司主要供应的水性涂料助剂可分为四大类：分散剂、增稠剂、漆膜改良剂、消泡剂。这里首先介绍分散剂和增稠剂，其他助剂后期再续。     

Experimental investigation of the drying process of water-based paints used in automotive industry

The objective of the government-funded research project “SiLat” (Simulation der instationären Lacktrocknung bei dreidimensionalen Objekten—simulation of paint drying processes on three-dimensionally shaped geometries) is the development of a CFD-software simulation add-on for the drying process of paints [11]. The software is intended to be used in the automotive industry to predict the intermediate drying process of water based paints on car bodies in continuous convective dryers. To validate the software, several laboratory scale experiments, using industrial water-based paint systems and a model base paint system applied on a sheet of metal, were carried out. Conditioned air was used for the drying process. The experimental setup was varied in three different ways: paint on a flat sheet was dried in impinging jet and parallel flow conditions. Furthermore, a Z-shaped sheet was dried during parallel flow conditions. Additional experiments were performed varying the flow parameters. During all experiments, the sheet temperature and weight of the painted sheet were monitored with a rate of 1 Hz. The evaporation of the organic solvents could be monitored using FTIR-spectroscopy. This contribution deals with the experimental investigations and simulation results, whereas the paint drying model is presented by Domnick et al. [5] in detail.     

水分测试方法对水基型胶粘剂VOC含量的影响研究

采用卡尔费休滴定法和加热炉卡尔费休滴定法,对12种不同黏度的水基型胶粘剂样品进行水分含量测定,并对黏度为3 400和68 700 mPa·s的两种样品分别进行准确度和精密度测试。研究结果表明:当胶粘剂的黏度20 000 mPa·s时,两种测试方法的结果基本相同,准确度和精密度较高;当胶粘剂的黏度20 000 mPa·s时,卡尔费休滴定法的水分含量测试结果偏低,准确度和精密度较低,而加热炉卡尔费休滴定法的测试结果更为准确,准确度和精密度较高。     

水性道路标线涂料的发展与待解问题

水性道路标线涂料适应环保的需要 ,是大势所趋。介绍国内外的发展概况及如何制定产品标准和施工工艺 ;如何实现基料的多样化 ,提高涂膜的耐水性等。     

欧洲装饰涂料市场对VOC限制及对策分析

欧洲装饰涂料的零售商有 15万家 ,水性涂料的市场份额为 70 %。按目前欧洲现有涂料产品的水平 ,每年VOC释放量约为 5 8万t。介绍装饰涂料的VOC水平 ,并对如何降低和认识VOC提出了建议。     

由美国发生的一场官司而议——关于涂料VOC含量限值

去年国家出台了涂料产品两项新的强制性标准 ,执行过程中引发了不少争议 ,大洋彼岸的美国也出现了类似情况 ,甚至引发一场官司 ,孰是孰非 ,此文可发人深省