新型环氧硅酸酯防腐涂料的研制

将环氧树脂和硅酸酯预聚物通过催化缩合反应,制得环氧硅酸酯涂料,兼有有机和无机涂料的优点,具有高硬度、高耐磨、高附着力、优异的抗渗性、抗溶剂溶胀、抗介质氧化等性能。本文介绍了环氧硅酸酯树脂的合成以及环氧硅酸酯新型防腐涂料的制备。     

钢结构用超薄型水性环氧防火防腐涂料的研制

以液体环氧树脂为基料树脂,以水性胺为固化剂;以聚磷酸铵、三聚氰胺、季戊四醇、氯化石蜡为膨胀阻燃体系;以纳米TiO2、可膨胀石墨为增效剂;以复合铁钛粉为防锈颜料,制备了钢结构用超薄型防火防腐涂料。当环氧涂层的交联度达到理论交联度的50％～70％时,涂层既有优良的防火隔热性能,又有优良的防腐蚀性及机械性能。     

Studies on novel silicone/phosphorus/sulphur containing nano-hybrid epoxy anticorrosive and antifouling coatings

The objective of the present work is the development and characterization of silicone, phosphorous and sulphur containing nano-coatings using diglycidyl ether of bisphenol-A type epoxy resin (DGEBA) as base material, tris (p-isocyanatophenyl) thio phosphate (DESMODUR) as modifier and POSS-NH₂ (polyhedraloligomeric silsesquioxane) as nano-reinforcement. The nano-coatings were cured by Aradur 140 (polyamidoimidazoline) and XY 54 (polyamidoamine) curatives. The corrosion and fouling resistant properties of these coatings were evaluated by potentiodynamic polarization, electrochemical impedance, salt-spray and antifouling tests. It was interesting to observe that the molecular structure of curing agents as well as the nano-reinforcing effect of POSS-NH₂ significantly influenced their corrosion and fouling protection behaviour. For example, coating system ‘1’ alone retained an impedance value of 10⁹ ohm cm² even after 30 days of immersion indicating no deterioration on the coating. However the impedance values of other specimens decreased from 10⁹ to 10⁷ and 10⁶ ohm cm². This observation clearly indicates the synergistic effect of curing agent and nano-reinforcing effect of POSS-NH₂ towards corrosion resistance. Similar observation was made from the antifouling study, with a marked inhibition of bacterial adhesion on such coated panels.     

高抗流挂厚浆型环氧重防腐涂料的制备

以双酚A环氧树脂为主体树脂,酚醛胺和聚酰胺为固化剂,制备了一种具有高抗流挂性的厚浆型环氧重防腐涂料。该涂料不仅具有低VOC(挥发性有机化合物)含量,而且通过触变剂的合理搭配,一次喷涂湿膜厚度达到500μm而不流挂,大大改善了施工环境,提高了施工效率。涂层性能的测试结果表明:该涂料具有良好的附着力、优异的耐腐蚀性,综合性能优异。     

The influence of ageing of epoxy coatings on adhesion of polyurethane topcoats and protective properties of coating systems

The dependence of adhesion and protective properties of coating systems on surface properties of epoxy intermediate coatings, aged and non-aged before an application of polyurethane topcoats, were examined. The intermediate coatings were aged 500 h in UV chamber. The surface free energy and polar groups were estimated after ageing. After applying polyurethane topcoats on aged and non-aged epoxy coatings, resistance to salt spray and thermal shocks were tested as well as internal stresses were measured before and after corrosion tests.The results showed that adhesion in coating systems with polyurethane topcoats applied on aged epoxy coatings depends strongly on the degradation degree of epoxy intermediate coatings and the value of generated internal stresses. Coatings with good adhesion retention in corrosion environments have good protective properties even when temporary blistering has occurred.     

Flexible epoxy novolac coatings: Use of cardanol‐based flexibilizers

Flexible epoxy novolac coatings were developed by reacting an epoxy novolac resin, poly[(phenylglycidyl ether)‐co‐formaldehyde] (PPGEF) with an amine curing agent, 4,4′‐diamino‐3,3′‐dimethyldicyclohexyl methane (BMCHA), cardanol based reactive diluent (Cardolite NC‐513) and two different cardanol‐based flexibilizers (Cardolite NC‐514 and Cardolite NC‐547). The flexibilizer content was varied from 5 to 10% by weight of the resin. These resins were coated onto the stainless steel panels and tested for their gloss, cross‐hatch adhesion, falling weight impact resistance, flexibility, abrasion, scratch hardness, solvent scrub resistance, and chemical resistance. The thermo‐mechanical properties of these coatings were determined by TGA, DSC, DMTA, and tensile strength measurements. The cryofractured specimens were subjected to SEM analysis. The influence of structural differences of two flexibilizers on the coating properties was investigated. These coatings exhibited excellent properties and have great potential in industrial applications. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 44920.     

一种不锈钢用涂层研究

研制了一种适用于奥氏体不锈钢材料的重防腐涂料。介绍了该涂料配方的设计思路。通过盐雾试验对成膜物质进行了筛选,获得了由A、B组分组成的无色透明的重防腐涂料。其中A组份的配方为:1改#性树脂25%,2#改性树脂51%,高沸点溶剂20%,助剂4%。B组份为:环氧树脂50%,增韧树脂10%,溶剂38%,助剂2%。对涂饰该涂料的不锈钢器皿作了工作介质浸泡试验、毒性检测和附着力检测实验。结果表明,经过工作介质浸泡1个月后涂层耐蚀性优良;毒性检测符合国家标准;附着力达到5B等级。     

高性能双组分无溶剂改性环氧砂浆重防腐涂料的研制

研制成一种高性能双组分无溶剂改性环氧砂浆重防腐涂料。介绍了该涂料的配方和制备工艺。讨论了树脂体系、触变剂对涂层防腐性能及施工性能的影响,同时采用电化学阻抗谱(EIS)方法评价了涂层的防腐性能,并与国内同类产品的施工性能进行比较。     

飞溅区维保用高固含量环氧涂料的研制

以液体环氧树脂及改性树脂为基料，以改性胺为固化剂，通过选择相应的颜填料，研制了用于飞溅区维保用高固含量环氧涂料。通过对研制的高固含量环氧涂料进行性能测试，结果表明：该产品不但具备飞溅区防腐要求的耐磨性、耐循环老化、耐海水浸泡及抗阴极剥离性能，同时具有优异的耐高湿性、低表面容忍性及可快速浸泡入水中继续固化性能，满足飞溅区的维保防腐需求。     

The use of polypropylene in pipeline coatings

Despite the fact that the pipeline coating represents only about 5% of the total cost, the choice of the most effective coating is a key point to guarantee the life of the installed pipelines. Since the eighties, polypropylene copolymer coatings have been used for the protection of the external surface of on-shore and off shore pipelines. Polypropylene is one of the most suitable coatings when high mechanical properties (impact resistance, penetration resistance, etc.) and/or heat resistance are required. Polypropylene has also been used in ordinary pipelines giving advantages compared with the standard coatings, e.g. fusion bonded epoxy resin, coal tar enamel and polyethylene. New applications for polypropylene copolymers such as pipeline coatings have recently been developed, these include an insulating coating obtained with foamed polypropylene and an internal coating obtained by spraying a polypropylene adhesive powder.     

Positive effect of the addition of polyaniline on the anticorrosive property of polyethersulfone two-layer composite coating

In order to prepare a coating with better corrosion resistance, the double-layer coatings are designed to work together in this article. The double-layer coatings are made of polyethersulfone and epoxy resin as the matrix resin. Polyaniline (PANI) of different contents was added to the matrix resin by weight to form the primer coats, which was named as d-0, d-20, d-40, d-60. And polytetrafluoroethylene was introduced into the matrix resin to prepare the surface coats. A two-layer coating was prepared by coating the surface layer on the primer layer, named as S-0, S-20, S-40, S-60. The surface morphology of the primer coatings and the cross section morphology of the two-layer coatings were determined by field emission scanning electron microscopy. The anticorrosion property of the coatings was studied by water absorption, adhesion, salt spray corrosion acceleration test and electrochemical impedance test. The results indicate that the 40 wt% PANI composite coating shows the best corrosion resistance.     

环氧改性丙烯酸乳胶防锈涂料

以环氧E—51与St、BA、MAA、N—MA等单体经乳液聚合方法制成环氧改性丙烯酸乳液，用于防锈涂料。讨论了环氧树脂对乳液的成膜性能、各种稳定性及涂料耐腐蚀等性能的影响。     

Electrochemical characterisation of multilayer organic coatings

The protective properties of eight high performance commercial multilayer organic coatings for aeronautical use (based on polyurethane, epoxy and polyurethane-compatible epoxy resins) on anodised 2024-T3 Al alloy were evaluated in neutral aerated 3.5% NaCl aqueous solution using the electrochemical impedance spectroscopy (EIS) technique. The investigation was performed on specimens supplied and prepared from Alenia in accordance with their technical specifications. Results obtained in this paper show that all coating systems exhibit excellent protective properties even after prolonged immersion in the test solution (one year). Although the dielectric properties of all multilayer coatings are quite similar, EIS was proved to be able to discriminate among them, making possible a rank of these protective systems to prevent or to reduce corrosion. Capacitance measurements performed on the same coatings allow their behaviour to be forecasted.     

Water‐borne melamine–formaldehyde‐cured epoxy–acrylate corrosion resistant coatings

Organic protective coatings are widely used in corrosion control. However, environmental standards establish that the volatile organic compounds either must be removed or controlled at the lowest possible levels. The carcinogenic environmental impact of volatile organic compounds has led to the substitution of solvent‐borne coatings by water‐borne coating systems. Among recently developed water‐borne coatings, epoxy‐ and acrylic‐based coatings have a special significance over other reported water‐borne systems. Keeping in mind, the importance of water‐borne coatings in the present work, we report the synthesis of water‐borne epoxy–acrylate (EpAc) and melamine–formaldehyde (MF) as well as formulation of their anticorrosive coatings. The structural elucidation of MF‐cured EpAc was carried out by FTIR, ¹H NMR, and ¹³C NMR spectroscopic techniques. The coatings of EpAc‐MF were applied on mild steel strips and were evaluated for physicochemical, physicomechanical characterization, and the anticorrosive performance under different environmental conditions. The present coating system EpAc coatings exhibited superior performance as compared to the reported water‐borne epoxy–acrylatecoatings. The presence of melamine–formaldehyde in the resin increases the scratch hardness, impact resistance, alkali resistance, and thermal stability of these coatings. EpAc‐MF‐1 was found to cure at ambient temperature and exhibit good physicomechanical properties. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

水性环氧富锌涂料在长兴岛原油储罐上的应用

水性环氧富锌防腐涂料取代传统溶剂型富锌涂料已经在国内原油储罐涂装工程上有着广泛应用,以大连长兴岛原油储罐项目为例,介绍了水性环氧富锌涂料的特点、性能及施工工艺,说明了水性环氧富锌涂料不但具有优异的防腐性能、VOC低,而且施工方便,具有较好的发展前景。     

双组分喷涂型无溶剂超厚膜环氧重防腐涂料的研制

选用高环氧值、低黏度改性环氧树脂作为基料树脂,按一定比例复配曼尼斯碱和腰果酚酚醛胺为固化剂,搭配自制触变性浆体、多活性端基低黏度聚合物活性稀释剂、缓蚀型颜填料及助剂,制备了一种双组分喷涂型无溶剂超厚膜环氧重防腐涂料,并对涂料性能影响因素进行了分析,对涂层性能进行了测试,结果显示该涂料机械性能和防腐性能优异。     

功能型环氧树脂基防腐涂层的研究进展

环氧树脂涂层因其优异的耐蚀性能、对金属表面良好的附着力而在金属防腐领域得到广泛应用。但涂层固化过程中会形成缺陷和孔洞，腐蚀介质可以直接接触到金属表面。为了开发出具有优良耐久性的防腐涂层，研究人员使用不同的方法和材料制备了多种环氧树脂防腐涂层。该文综述了纳米粒子改性环氧防腐涂层、超疏水型环氧防腐涂层、自修复型环氧防腐涂层、导电聚合物改性环氧防腐涂层及生物基材料改性环氧防腐涂层的制备及性能。但这5种防腐涂层各有局限性，未来应该探究出新的环氧防腐涂层，在提升涂层防腐性能的同时，兼顾其他性能，使环氧树脂基防腐涂层朝着功能化、智能化的方向发展。     

Inorganic/organic hybrid coatings for aircraft aluminum alloy substrates

A series of water-based stable sol–gel systems have been developed. Various functional groups including amino, epoxy, vinyl, and allyl groups can be incorporated into the sol–gel network to interact with organic polymer resins. The solid content of these sol–gel-based coating formulations varies from 2.5 to 45%. The sol–gel coating of alumina–silica networks derived from low solid content solutions (2.5%) has been developed and evaluated to replace the current conversion coating pretreatment process. Sol–gel coatings derived from the high solid content solutions (17–45%) have shown excellent mechanic strength, good adhesion, and provide corrosion protection of the aluminum substrate when cured at elevated temperatures. Sol–gel/epoxy resin hybrid coatings have been formulated and studied. The hybrid coating showed enhanced mechanical strength such as hardness and abrasion resistance. When cured at elevated temperatures (80°C), all of the hybrid coatings studied passed wet adhesion testing. Some of the hybrid coatings pass wet adhesion testing when cured at room temperature. However, water-sensitivity remains for most of the room temperature cured hybrid coatings.     

PC改性高氯聚乙烯防腐蚀涂料的研制

采用酯化型环氧树脂（ＰＣ）与高氯聚乙烯（ＨＣＰＥ）共混,制得ＰＣ改性ＨＣＰＥ防腐蚀涂料,可作为氯磺化聚乙烯（ＣＳＭ）防腐蚀涂料的替代品种。介绍了ＰＣ改性ＨＣＰＥ防腐蚀底漆、面漆的配方及生产工艺。列举了该涂料与ＣＳＭ防腐蚀涂料的性能对比。讨论了溶剂、改性树脂、颜填料对涂料性能的影响。     

耐热,耐油防腐涂料的研制

研制成耐热、耐油防腐涂料。该涂料是以生漆为主要原料,经改性,拼入多种颜填料配制而成,解决了热油介质下热交换器的防腐。阐述了漆酚甲醛树脂和环氧有机钛改性漆酚甲醛树脂的制法,以及涂料的配制。列举了该涂料的物理机械性能和耐化学品性能指标。讨论了影响涂层性能的因素。