改性磷酸锌在水性环氧防腐涂料中的应用

通过选用钼酸锌对磷酸锌防锈颜料进行改性,并将其应用于水性环氧防腐涂料中,制得了具有优异防腐功能的新型水性环氧涂料。研究了改性磷酸锌对水性环氧涂料的耐盐雾腐蚀性能的影响,确定了水性环氧防腐涂料的最佳PVC值,并使用SEM对防锈颜料及水性环氧涂料的性能进行了表征。结果表明当使用钼酸锌对磷酸锌防锈颜料进行改性,水性环氧防腐涂料的PVC值为38%时,此时水性环氧防腐涂料的耐盐雾性能可达500 h,且涂料具有最佳的综合性能。     

几种新型富锌涂料的研究进展

介绍了氧化石墨烯改性水性环氧富锌涂料、石墨烯纳米片/环氧富锌(Gnps/ZRE)复合涂料、高柔韧性、高附着力水性无机富锌涂料、石墨烯硅酸盐富锌防腐蚀涂料、水性聚苯胺/氧化石墨烯改性低锌粉含量防腐涂料、还原-氧化石墨烯(r-GO)改性环氧富锌涂料、耐盐雾双组分水性环氧富锌涂料、石墨烯浆料改性水性环氧富锌涂料、双电层水性无机富锌涂料、SnCl2/EtOH溶液法还原氧化石墨烯环氧富锌涂料、有机-无机杂化水性富锌涂料、水性富锌铝涂料、低锌含量石墨烯长效防腐涂料、自固化醇溶性无机富锌底漆和冷镀锌喷漆等几种新型富锌涂料的研究进展。     

氧化石墨烯改性水性环氧防腐涂料的制备及性能研究

水性涂料因VOC含量低,绿色环保等是目前涂料的重点研究方向之一,利用氧化石墨烯的亲水性、防腐蚀性能等将其对水性环氧树脂乳液进行改性,制备得到了氧化石墨烯改性水性环氧防腐涂料。采用XPS、Raman光谱等表征了氧化石墨烯的结构,并探讨了氧化石墨烯及水性固化剂的加入量对涂料性能的影响。结果表明,氧化石墨烯的加入量为8%,环氧固化剂的加入量为50%时,在该条件下配制的氧化石墨烯改性水性环氧防腐涂料很好地满足了既定的技术指标。     

防腐涂料在石油化工中的应用

石油化工行业由于环境的高腐蚀性,对防腐涂料的要求较高,传统使用的涂料中溶剂含量高,一道成膜低。从"环保、安全、省时"的角度出发,阐述了低VOC高膜厚涂料、快干型环氧涂料、新型无机涂料、水性重防腐涂料和低表面处理环氧涂料等新型防腐涂料在石油化工行业中的应用。     

高性能水性环氧防腐涂料的研制

采用水性环氧树脂乳液和水性改性胺环氧固化剂作为成膜物质,同复配磷酸盐防锈颜料、水性助剂等研制成高性能水性环氧防腐涂料。该涂料安全环境友好兼具优异防腐性能,适用于对有严格环保安全要求的工业钢结构防腐领域。     

水性防腐涂料的发展现状

综述了水性防腐涂料的作用机理。详细介绍了水性丙烯酸涂料、水性聚氨酯涂料、水性环氧涂料及水性无机富锌涂料4种水性防腐涂料的特点及发展现状。展望了水性防腐涂料的发展前景。     

水性环氧防腐涂料的应用研究

制备了一种高性能水性环氧防腐涂料,测试结果显示,该涂料具有优异的物理机械性能、良好的耐水和耐盐雾性。     

市场纵横

重防腐涂料行业发展的四大要点重防腐涂料行业要健康发展,需解决4个方面的问题。一是把环保、节能、高性能和功能化作为重防腐涂料和涂装的发展重点。未来5年内必须开发出环境友好型长效防污涂料,以符合2008年禁用三丁基锡防污涂料的要求;开发以复合磷酸盐防锈涂料为基础的防腐涂料,代替有毒污染环境的红丹、铬酸盐等重金属防腐底漆;高固体分、无溶剂以及水性防腐涂料逐步取代传统的溶剂型涂料;还要开发和推广水性防腐涂料、水性环氧地坪涂料。二是用标准化规范市场。目前,海洋平台防腐、铁路桥梁、车辆、造船、修船和集装箱行业及海军舰船…     

水性环氧防腐涂料配方中助剂的应用研究

水性环氧防腐涂料在应用过程中的分散、泡沫、润湿等问题会影响环氧涂料的施工性能和防腐性能。分析并研究了水性助剂(消泡剂、分散剂、润湿剂)在水性环氧防腐涂料配方中的影响,为水性助剂的筛选与应用提供了有益的解决方案。结果表明:涂易乐~助剂不仅可以有效改善水性环氧防腐涂料配方中颜填料的分散稳定性、与树脂间的相容性,而且提供水性环氧涂料优异的控泡破泡效果和卓越的基材润湿性,保证涂膜质量。     

水性涂料在混凝土防腐中的应用

随着水性涂料的不断发展和成熟,混凝土防腐用水性涂料体系也不断涌现。结合交通行业中混凝土桥梁防腐涂料标准及防腐技术条件,以及具体的涂料使用环境和工程实践,介绍了水性环氧类混凝土防腐涂料体系、水性丙烯酸类混凝土防腐涂料体系、清水混凝土用水性氟硅透明涂料体系等三类目前使用较为广泛的混凝土防腐用水性涂料体系及其各自特点。     

Preparation and investigation of anticorrosion properties of the water-based epoxy-clay nanocoating modified by Na+-MMT and Cloisite 30B

In this study the effect of using nanoclay particles in two different matrices on anticorrosive performance improvement of a novel water-based epoxy coating was investigated. For this purpose, Na⁺-montmorillonite (Na⁺-MMT) and organo-montmorillonite (Cloisite 30B) were introduced into water-based hardener (RIPI-W.B.H.) and epoxy resin matrices, separately. Nanoclays were added to polymeric matrices using direct mixing under an ultrasonic homogenizer. The coatings were analyzed to ensure the intercalation and distribution of layered silicates by means of X-ray diffraction (XRD) and transmission electron microscope (TEM) analyses. The structure of products is studied by infrared (IR) spectrometer. The corrosion protection performances of the coatings were investigated using salt spray test and electrochemical impedance spectroscopy (EIS) in 3.5% sodium chloride solution. The results showed that using Cloisite 30B in water-based hardener had the best performance and its application in anticorrosion water-based zinc rich epoxy coating approved of it.     

Using nanoemeraldine salt-polyaniline for preparation of a new anticorrosive water-based epoxy coating

In this study the anticorrosion performance of a two components water-based epoxy coating system is improved by using the nanopolyaniline (nanoPAni) particles. The purchased nanopolyaniline which was dispersed in water was mixed mechanically with the water-based polyamidoamine hardener of the epoxy system using ultrasonic homogenizer. Average particle size of the polyaniline in hardener was determined using dynamic light scattering technique (DLS). Results revealed that the particles were in the range of 50–57 nm. After combining the prepared sample with the DGEBA epoxy resin, finished coating was applied on steel substrates. Anticorrosion performance and adhesion properties of coating which contained nanoPAni were compared to the model water-based epoxy coating with the help of salt spray and adhesion tests. Results showed that anticorrosive performance of the model water-based epoxy system improved dramatically by adding only 0.02 wt.% nanoPAni. However in contrast to model coating, adherence of PAni-epoxy coating to steel plates was remained constant after their exposure to the corrosive media.     

环氧地坪涂料应用进展

介绍了环氧树脂地坪涂料的组成、特性、分类,综述了水性化、功能化环氧地坪研究以及环氧地坪的改性和应用进展。     

Highly protective performance of water-based epoxy coating loaded with self-doped nanopolyaniline synthesized under supercritical CO2 condition

In this study corrosion properties of water-based epoxy coating on carbon steel (CS) are improved by adding self-doped nano-polyaniline (SPAni) synthesized under supercritical carbon dioxide (ScCO₂) condition. The modified ScCO₂-synthesized SPAni using water-based polyamidoamine hardener results in formation of the water-based SPAni composite (Sc-WB). To obtain the water-based polyaniline epoxy coating (SP-WBE), the Sc-WB was mixed with epoxy resin in stoichiometric ratio. Applying SP-WBE on CS substrate resulted in high improvement in corrosion properties compared to the similar coating without SPAni. Formation of oxide layers and adhesion properties of SP-WBE at corrosive medium were evaluated using scanning electron microscope (SEM). The transmission electron microscope (TEM) was used to observe the distribution and particles size of nanopolyaniline in the final dried film. The anti-corrosion performance of water-based epoxy coating (blank sample) and SP-WBE coating on CS substrates were studied using salt spray standard test according to ASTM B-117, electrochemical impedance spectroscopy (EIS) and adhesion tests. EIS studies, after 1800 hrs of exposure to corrosive solutions, result in charge transfer resistance of 1.816E9 Ω and 8.64E7 Ω for SP-WBE and blank samples, respectively.     

单组分水性聚氨酯的改性研究进展

综述了单组分水性聚氨酯的环氧树脂改性、有机硅改性、纳米材料改性、天然产物改性等方法和特点,展望了水性聚氨酯涂料的市场前景。     

水性环氧树脂应用性能研究

采用巴陵石化的自乳化性中分子质量水性环氧乳液CYDW-112W50及液体双酚A型环氧树脂CYDW-100与4种胺固化剂配制成4种水性体系,通过对涂膜物理、力学和耐腐蚀性的测试研究了不同固化体系和不同环氧与胺氢的配比对水性体系性能的影响。结果表明:离子型水性环氧体系硬度最高,附着力等比较优异,适合用于底涂或中涂;乳液型水性环氧体系柔韧性能较好,适合用于中涂和面涂;胺氢与环氧基团物质的量比为1.0～1.1∶1时,固化物综合性能最优,据此提出了防腐涂料及改性混凝土的参考配方,产品经性能测试达到使用要求。     

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.     

纳米复合改性水性环氧涂料的研制

以涂膜的冲击强度为指标,通过正交试验和单因素实验确定了制备纳米复合改性水性环氧涂料的最佳工艺条件,并通过红外光谱和热重分析对其进行表征.结果表明,当固化剂乙二胺用量为10%、甲基丙烯酸(MAA)4%、过氧化苯甲酰(BPO)2%,反应温度50 ℃、反应时间40 min 以及纳米SiO2和TiO2 的添加量分别为4%和2%...     

Synthesis and physico-chemical evaluation of water-soluble epoxy ester primer coating

The objective of this paper was to formulate high performance water-based paints by an esterified epoxy resin, synthesized by reacting epoxy resin with pyromellitic dianhydride (PMDA) and pigmented with non-toxic phosphate using varying pigment-volume concentrations (PVCs). The influence of pigment concentrations on some physico-chemical properties was evaluated and assessed for the optimized PVC coating formulation. The structural and thermal stability of the epoxy ester vehicle was also evaluated through FT-IR and thermogravimetric analysis (TGA). Film properties of the coatings were studied and it was found that the coating composition at lower PVCs exhibited better film property over higher PVCs.     

Investigation on anticorrosion performance of nano and micro polyaniline in new water-based epoxy coating

In this research, a micro polyaniline (MicroPAni) and a dispersion of nano polyaniline particles (NanoPAni) were used as anticorrosion additive in a new water-based epoxy coating. Both materials were added directly to a new water-based hardener (RIPI-W.B.H.). The resulted mixtures were homogenized and sonicated for size reduction and better particle dispersion. The average particle size of polyaniline in the hardener was determined using dynamic light scattering (DLS). Transmission electron microscopy (TEM) was used to observe the particle size of polyaniline in the final dried film. After applying the coatings on metal surface, anticorrosion performance and adhesion properties of the coatings were compared together with a reference coating using salt spray and cross-cut adhesion tests. The results showed that anticorrosion performance of coating containing NanoPAni was better than the one for coating containing MicroPAni. In addition, investigation on the morphology of metal-coating interface by scanning electron microscopy (SEM) technique in samples containing polyaniline after salt spray test showed stable oxide layer formation on metal surface, which will enhance the corrosion resistance.