硅烷在油漆与涂料中的应用

介绍了硅烷在涂料中的各种最新应用,包括各种硅烷改性水性丙烯酸酯涂料、硅烷增粘底漆、硅烷溶胶-凝胶涂料及硅烷富锌底漆等。对涂料工程师在各种涂料配方中应用硅烷来提高涂料性能具有一定的借鉴作用。     

Corrosion-protection properties of water-borne paint coatings as studied by electrochemical impedance spectroscopy and gravimetry

Water-borne paint coatings while used outdoors, show good protective behaviour on metals, even though they can take up and release much moisture. As experience shows for physically drying paint coatings, the changing wet-and-dry environment improve their corrosion protection properties. To find out the reasons, eight model coatings – built up from various combinations of layers made of the physically drying styrene-acrylate, and the oxidatively drying alkyd-acrylate based paints – were tested on metal substrate by electrochemical impedance spectroscopy; water uptake/release kinetics was followed by gravimetry on self-standing films made of the above resins. The results of experiments simulating the weathering effects (wet–dry cycling and heating) with the physically drying paint coatings lead us to the conclusions that: (i) water uptake and release removes the water-soluble components from the film and thereby contributes to the good or improving corrosion protection feature, and explains the observation that these coatings perform satisfactorily outdoors and (ii) water release is always much faster than the uptake which helps to keep the interior of the coating dry protecting the metal surface against moisture.     

The flow of paint coatings: a hydrodynamic analysis

The flow of a viscous liquid film on a plane surface, under the influence of gravity and surface tension, is analysed mathematically, taking into account the initial surface profile of the liquid and any inclination of the underlying surface. The approach adopted is suitable for liquids such as paint where the Reynolds number is extremely low and the viscosity may be shear or time dependent. The surface profile is represented by a complex Fuorier Series and the hydrodynamic analysis centres on the biharmonic equation for the stream function. Two velocity components are derived for each point on an arbitrary initial grid and the displacements are obtained on multiplying by a short time interval from which the next grid is obtained. In this way the progress of the surface profile can be followed. Such a numerical method is eminently suitable for computer graphic simulation.     

光固化涂料中活性稀释剂的研制

研究了用直接酯化法制备五种多元醇多丙烯酸酯活性稀释剂的工艺过程。确定了适合反应的阻聚剂、催化剂、溶剂及醇酸比 ,产品收率可达 85 %。     

商用车高亮色油漆的开发与应用

以开发高亮色油漆为例,重点介绍了新油漆开发与应用流程,主要包括色彩开发、性能试验、生产准备、试生产等阶段.为了确保新油漆开发质量和效率,需要在开发和应用过程中细化重要环节流程,以最终达到提升产品质量和市场占有率的目的.     

PE工程塑料表面脱漆剂的研制

考察了不同溶剂对涂层的脱漆效果,筛选出具有良好脱漆效果的正丁醇作为脱漆剂的主溶剂,二乙二醇丁醚作为助溶剂和乙酸作为促进剂,加入水以起到降低成本和活化活性基团的作用,各溶剂比例为主溶剂∶助剂∶促进剂=7∶2∶1,水∶有机相=2∶8,脱漆剂的脱漆能力为2 m²/L。     

PE工程塑料表面脱漆剂的研制

考察了不同溶剂对涂层的脱漆效果,筛选出具有良好脱漆效果的正丁醇作为脱漆剂的主溶剂,二乙二醇丁醚作为助溶剂和乙酸作为促进剂,加入水以起到降低成本和活化活性基团的作用,各溶剂比例为主溶剂:助剂:促进剂=7:2:1,水:有机相=2:8,脱漆剂的脱漆能力为2 m2/L.     

丙烯酸立体锤纹涂料的研制

研制了一种丙烯酸立体锤纹涂料。介绍了其配方及配制过程,测量了其各项性能,并探讨了丙烯酸树脂,锤纹助剂,铝粉,施工粘度和溶剂对漆膜性能及锤纹效果的影响。结果表明：丙烯酸立体锤纹涂料的各项性能优良,施工简单,成本低,所得锤纹均匀美观。     

多颜色粉末涂料在汽车车厢上的开发应用

介绍了粉末涂料的喷涂工艺流程、喷涂设备及烘干系统,对多颜色串色问题提出了解决方案,制定了汽车车厢用粉末涂料的技术指标,并举例说明了验证粉末涂料与前处理电泳防腐配套性能的方法.     

水性带锈涂料的研制

研制出一种水性带锈涂料，介绍了涂料的组分及配制方法，讨论了转化剂，缓蚀剂和防腐颜料等对涂料除锈，防锈能力的影响，该涂料可将钢铁表面的铁锈转化为成膜物覆盖在钢铁表面，防锈效果好。     

我国船舶和重防腐涂料市场的现状及展望

结合我国重防腐涂料近10年来的现状与市场态势,分析了不同企业的市场占有率所发生的变化,竞争优势对比以及今后发展建议。     

Use of some essential oils as natural preservatives for butter

Thyme and cumin essential oils were used in the present study in an attempt to prevent butter deterioration during storage at room temperature. Butter oxidation and lipolysis were followed by measuring the acid, peroxide and TBA values. Lipolytic activity and total microbial and lipolytic bacterial counts were also measured. During butter storage, very little change in the peroxide and TBA values were found while a gradual increase in the acid value was noticed. The addition of cumin and thyme oils at 200 ppm to butter caused very little increase in the acid value. The data for lipolytic bacterial counts were in general agreement with the acid values. Thyme and cumin essential oils showed a greater anti-hydrolytic effect and act as superior preservatives compared to BHT.     

水性带锈防锈涂料的研制

利用正交试验设计一种水性带锈防锈涂料配方,选择乳液、三聚磷酸铝、氧化铁红和缓冲液四个因素,通过极差分析讨论了附着力、硬度和遮盖力对涂层性能的影响,筛选出最优涂料配方.实验结果表明,该配方涂层附着力达到3级、硬度6H、遮盖力好、耐水性耐腐蚀性好,可带锈施工,具有一定的应用价值.