Synthesis of heterocyclic metal complexes and their evaluation as marine antifoulants

4-Amino-3-thio-1,24-triazolidine (L₁) and 4-amino-5-thio-1,3,4-thiadiazole (L_II) as well as their metal complexes of the general formulae ML_I·2H₂O and ML_IICl (M; Pb(II), Cd(II) and Zn(II)) were prepared. With Sn(II), we obtained Sn(L_I)₂·2H₂O and SnL_IICl, respectively. The structures of the compounds were identified through elemental analysis, and IR and UV spectra measurements, in addition to thermal analysis in case of the metal complexes. The antifouling properties of the compounds were tested by their incorporation into paint formulations which were applied to PVC substrates and tested in water from Alexandria western harbour. When the compounds were added at 17·5% by volume, the coated panels were fouled after 3 months of immersion. The addition of 6·7% by volume of tributyltin oxide to 15·8% of the prepared compounds in one formulation elevated the paint efficiency and prevented fouling for 11 months. Paint containing solely tributyltin oxide at the same concentration was inactive against algae.     

乳胶漆的市场现状和发展前景

对乳胶漆的生产现状，产品结构以及研究开发情况作了简单的综述，并展望了乳胶漆的发展前景。     

Emission Of Volatile And Semivolatile Organic Compounds From Waterborne Paints – The Effect Of The Film Thickness

A waterborne paint was applied to tin plated steel sheets with three different film thicknesses. The emission of volatile and semivolaile organic compounds ((S) VOCs) from the samples was measured in small climatic chambers under standard conditions over a two-week period. The purpose of the study was to evaluate the effect of the film thickness on the emission rate decay. First order decay models, including sink effects for the high boiling (S) VOCs, were fitted to the concentration versus time data. The results showed that the first order rate constants decrease with increasing film thickness. In uddition, the results indicated that the emissions of the (S)VOCs in the waterborne paint film seemed to be controlled by evaporation. The thicknesses of paint films used in climatic chamber tests to estimate emission rates for product compurison or emission prediction must be known in order to prevent erroneous conclusions     

Spray Coating of 2- and 3-D Solid Substrates Using a Sulfated Polysaccharide for Marine Antifouling Applications

Marine antifouling coating using functional polymers has emerged as an important tool to combat marine fouling. Owing to their natural abundance, polysaccharides represent a more sustainable option than synthetic polymers and carrageenan, a sulfated polysaccharide, is identified as a promising candidate for further research based on its excellent marine antifouling properties. However, existing research has only explored the application of carrageenan-based coatings for 2D objects, using techniques such as spin-coating. Here, a spray-coating method is proposed to apply carrageenan-based coatings to the surfaces of 2- and 3-D objects. The coated surfaces exhibit high stability under various chemical/physical stresses and high resistance to protein adsorption and marine diatom adhesion.     

船舶防污涂料的研究与发展

简要介绍船舶防污涂料的发展历程,并对几种新型无毒防污涂料的前景作了展望。     

仿生学在涂料开发中的应用

简要介绍了仿生学研究的基本情况及其在海洋防污涂料、建筑涂料、伪装隐身涂料等中的应用发展概况。     

乳胶漆常见的缺陷及处理方法

简述了乳胶漆在贮存、应用过程中常见的缺陷以及产生的原因,提出了解决的方法.     

有机硅丙烯酸乳液的研制

以丙烯酸酯和有机硅官能单体为原料,合成了有机硅丙烯酸乳液。介绍了乳液及由其制备的涂料的性能。讨论了影响乳液性能的因素。     

船体防锈防污涂料体系配套与检测

船体防锈防污涂料体系是船舶涂料中最重要的体系之一。介绍了目前市场上几种防锈涂料及防污涂料,以及防锈防污涂料的主流产品及发展方向。阐述了与不同的防锈防污周期及应用对象相适应的配套产品,并介绍其主要的检测方法。