水性环氧防腐涂料的制备及应用性能研究

通过设计改性环氧树脂乳液配方,改善水性环氧树脂的性能,测试改性后的树脂在金属上的防腐性能,选择最佳改性乳液。通过使用磷酸酯改性环氧树脂,制备出水性环氧磷酸乳液,并研究了不同固化剂与水性环氧磷酸乳液的配比对涂层性能的影响,为了确定改性乳液对耐腐蚀性的影响,设计并制备了一系列含有改性乳液的水性环氧树脂涂料。通过对涂层的性能表征得到最佳的比例:当磷酸羟基与环氧基团的物质的量比为2∶3时,产品性能最佳。     

提高管道防腐用环氧粉末涂料机械性能的技术初探

目前国产管道防腐用环氧粉末涂料存在附着力、抗冲击性等性能差的问题，为此，提出了以改性环氧树脂作成膜树脂，酚醛树脂作固化剂，硅烷偶联剂改性无机颜填料等途径来提高涂层性能。阐述了该涂料的技术原理、配方设计和生产工艺。讨论了成膜树脂、改性颜填料、固化剂等对涂层性能的影响。     

环氧树脂与丙烯酸树脂的自分层行为研究

选择不同的混合溶剂体系考察部分相容的环氧树脂和丙烯酸树脂的自分层行为.首先通过计算不同的混合溶剂溶度参数在溶剂挥发过程中的变化,预测混合溶剂对两树脂的溶解情况和两树脂可能的分层行为,然后实验观察不同体系的自分层行为.实验结果表明混合溶剂的相对挥发速率不同,两树脂的分层效果不同;树脂膜厚不同,分层效果不同.实验得到了具有良好分层效果的丙烯酸树脂/环氧树脂膜,这为自分层涂料的制备提供了一种可供借鉴的研究方法.     

树脂三维溶解度参数重叠率对涂层梯度化过程的影响研究

用溶剂匹配法测定了环氧树脂和有机硅改性丙烯酸树脂的三维溶解度参数,并研究了这两种树脂的溶解度参数重叠率对涂层形成梯度化的影响。该方法可为底面合一涂料的研发提供理论依据。     

改性环氧重防腐粉末涂料的应用研究

对环氧树脂类型和固化体系进行了研究.选用酚醛改性环氧树脂和双酚A型环氧树脂的复配体系,通过固化剂的筛选验证,选用酚类树脂作为固化剂,再搭配合适的填料和助剂完善配方结构,最终研制出了一种在160℃/3 min条件下快速固化的环氧重防腐粉末涂料.本研究产品具有低温快速固化的特点,与传统的重防腐粉末涂料相比具有明显的节能优点...     

消防管道用的沥青防腐蚀涂层制备及性能试验

针对消防管道用水性防腐涂料环境耐性差的问题，提出一种沥青防腐涂料的制备，并对涂层的性能进行试验验证。试验表明，沥青防腐涂料最优配方：成膜体系为环氧乳液6520+固化剂8538系，体质填料为滑石粉，防锈颜料为6质量份的Fe₂O₃和4质量份的Zn₃(PO₄)₂，颜填料质量分数为30%，漆膜厚度为180μm。在上述最优配方条件下制备的沥青防腐涂料能有效阻止腐蚀介质对消防管道基质的腐蚀，表现出较好的防腐性能。     

固化剂对有机改性凹凸棒石/聚苯胺环氧树脂复合涂层性能的影响

固化剂对涂层的防腐、力学性能起着至关重要的作用.以环氧树脂为成膜物质,采用原位复合法在环氧树脂体系中合成有机改性凹凸棒石/聚苯胺(OAT/PAn)复合涂层,分别使用改性脂肪胺固化剂593、酚醛胺固化剂T-31以及聚酰胺固化剂650对上述涂层进行固化,讨论了不同种类固化剂对涂层的化学结构、防腐和力学性能以及耐水性能的影响.利用FTIR 对比了各涂层的固化结构,证明了三种固化剂均可使复合涂层固化;SEM结果表明,593固化剂固化涂层的致密性最好;电化学实验结果表明,593固化剂的固化涂层防腐性能最佳,腐蚀电位达到了Ecorr=-318 mV,腐蚀电流密度Icorr=1.193×10-6 A·cm-2;通过划格法评价了各涂层的附着力,发现593固化剂固化效果最好,附着力可达5B;对比浸泡168 h后涂层的耐水性发现,593固化剂耐水性最好.     

一种单组份环保型环氧树脂胶黏剂的制备

本实验以双酚A型环氧树脂为基体树脂,双氰胺为固化剂,咪唑为固化促进剂,BN(氮化硼)和A1₂O₃为填料,再添加适量的其他助剂,制备单组份环保型环氧树脂胶黏剂。通过对粘接强度,热性能、储能模量、玻璃化转变温度的测试,研究了基体树脂、填料、固化剂用量等因素对环氧树脂胶黏剂性能的影响,制备了单组份环保型环氧树脂胶黏剂。     

纳米二氧化硅改性环氧防腐底漆的研究

以纳米二氧化硅改性环氧树脂为主要成膜物,制备了一种防腐底漆。研究了纳米二氧化硅用量,固化剂、功能性颜料和助剂的选择及配比对涂料性能的影响。试验结果表明:与改性前相比,纳米二氧化硅改性环氧涂层的附着力、柔韧性明显提高;涂层湿附着力提高300%,柔韧性从30 cm提高到70 cm;采用改性树脂制备的防腐涂层的耐盐雾性和耐湿热性均达3 000 h以上;涂料施工固体分达75%以上;涂层的综合性能良好。     

低表面能树脂的性能及固化研究

通过化学改性,合成了环氧树脂/有机硅复合树脂。探讨了不同固化剂及其复配方式对其固化性能的影响,并得到最佳的固化剂配方。通过红外光谱（IR）、扫描电子显微镜（SEM）、动态力学分析（DMA）以及接触角测试,研究并比较了改性前后有机硅树脂涂层的微观结构形貌、体系混溶性、表面性能（接触角）等的变化。研究结果表明：环氧树脂与有机硅树脂之间具有较好的微观混溶性;改性后,树脂表面的粗糙度增加,接触角增大,形成低表面能树脂。     

Preparation and performance of new antifouling resins containing BIT group

New acrylate grafting epoxy antifouling resins containing benzoisothiazoline ketone (BIT) group were successfully synthesized, and their structures and performances were determined. Experimental data indicated that the new acrylate grafting epoxy antifouling resins have a strong bonding to the cured epoxy resin coating through chemical reaction and self-stratifying. And the paint prepared by using the new resin as matrix has excellent self-polishing and antifouling properties. Especially its antifouling period could be modified by changing the weight ratio of the usage of the mixed monomers and epoxy resin in the preparing process of the acrylate grafting epoxy antifouling resins.     

Synthesis and characterization of diphenylsilanediol modified epoxy resin and curing agent

A series of diphenylsilanediol modified epoxy resins and novel curing agents were synthesized. The modified epoxy resins were cured with regular curing agent diethylenetriamine (DETA); the curing agents were applied to cure unmodified diglycidyl ether of bisphenol A epoxy resin (DGEBA). The heat resistance, mechanical property, and toughness of all the curing products were investigated. The results showed that the application of modified resin and newly synthesized curing agents leads to curing products with lower thermal decomposition rate and only slightly decreased glass transition temperature (T_g), as well as improved tensile modulus and tensile strength. In particular, products cured with newly synthesized curing agents showed higher corresponding temperature to the maximum thermal decomposition rate, comparing with products of DGEBA cured by DETA. Scanning electron microscopy micro images proved that a ductile fracture happened on the cross sections of curing products obtained from modified epoxy resins and newly synthesized curing agents, indicating an effective toughening effect of silicon–oxygen bond.     

Effect on the toughness and adhesion properties of epoxy resin modified with silyl-crosslinked urethane microsphere

In order to give a toughness and improve adhesion properties of the cured epoxy system, modified epoxy resins, which have pre-reacted urethane microspheres formed using dynamic vulcanization method in liquid diglycidylether of bisphenol A, were prepared. It was found that the size of the particles decreased to sub-micro order with increase in solubility of urethane oligomers in epoxy resin, and coefficient of variance in the particle size distribution resulted in less than 15%. Fracture energy G_1c of the cured system was highly improved. Lap shear strength and peel strength were also improved. These mechanical and adhesion properties do not depend on any curing condition of epoxy resin because of the existing stable particles in the epoxy resin before curing.     

高性能环氧树脂基体的发展

综述了高性能环氧树脂的制备方法和性能。介绍了几种高性能的环氧树脂固化体系 ,新型的耐湿热性的环氧树脂 ,氰酸酯改性环氧树脂 ,液晶环氧树脂 ,双马来酰亚胺改性环氧树脂等     

Preparation and anticorrosive performances of polysiloxane-modified epoxy coatings based on polyaminopropylmethylsiloxane-containing amine curing agent

In this article, polysiloxane-modified epoxy coatings were prepared using the mixture (CPSA) of polyaminopropylmethylsiloxane (PAPMS) oligomer/N-(2-hydroxyethyl)ethylenediamine as a curing agent and cardanol as a compatibilizer. The PAPMS oligomer was prepared from the controlled hydrolysis and condensation of (γ-aminopropyl)methyldimethoxysilane. Conventional epoxy coatings based on commercial phenalkamine epoxy curing agent (PECA) were also fabricated for comparison. The compatibility between the CPSA amine curing agent and epoxy resin was investigated by SEM and element-mapping measurements. The anticorrosive performances of the CPSA- or PECA-based epoxy coatings were thoroughly examined by electrochemical impedance spectroscopy (EIS), salt fog tests, and immersion experiments in acid (25 wt% H₂SO₄), alkali (25 wt% NaOH), and saline (3 wt% NaCl). It was found that cardanol can dramatically improve the miscibility of CPSA with epoxy resins. Polysiloxane-modified (namely, CPSA-based) epoxy coatings have much better corrosion resistance than conventional (namely, PECA-based) epoxy coatings.     

无溶剂环氧防腐涂料的制备和性能研究

开发了一种以腰果酚改性胺为固化剂的无溶剂环氧防腐涂料,介绍了环氧树脂、固化剂、稀释剂以及填料等原料的选择,探讨了环氧树脂与腰果酚改性胺的固化机理,并考察了硅烷偶联剂对涂层防腐性能的影响。检测结果表明,环氧树脂与腰果酚改性胺的固化主要以环氧基与胺基之间的反应为主;硅烷偶联剂可以提高涂层的附着力,有效地增强涂膜的耐水性。     

Carbon fibre reinforced epoxy composites

Carbon fibre reinforced epoxy composites were fabricated from the matrix resin diglycidyl ether of bisphenol-A and novel tetrafunctional epoxy resins N,N,N′,N′-tetraglycidyl-2,2-bis[4-(4-aminophenoxy)phenyl]propane and N,N,N′N′-tetraglycidyl-1,1 ′-bis[4-(4-aminophenoxy)phenyl]cyclohexane using diaminodiphenyl methane as curing agent. Mechanical properties and chemical resistance of the composites were determined. Significant improvements in the mechanical properties were observed by adding epoxy fortifier to the resin-curing agent mixtures before fabrication of composites.     

酚醛环氧防腐涂料用固化体系研究进展

综述了近年来国内外酚醛环氧防腐涂料用固化体系的研究现状和进展,包括苯酚-甲醛、双酚A-甲醛树脂和腰果酚-苯酚-甲醛树脂等酚醛树脂固化体系,苯酚-甲醛、双酚A-甲醛改性胺和腰果酚缩醛胺固化体系及其他固化体系。认为腰果酚改性胺固化剂是一种性能优异的环氧树脂固化剂,它对开发新型高性能、多用途、低成本和环保型的重防腐环氧树脂涂料固化技术提供了新思路。     

环氧改性有机硅树脂的应用研究

以不同环氧改性有机硅树脂作为基料树脂,研究了不同树脂对漆膜性能的影响;通过选用不同固化体系对漆膜机械性能和耐热性做了比较;同时研究了环氧改性有机硅树脂与有机硅树脂的混溶性及影响;分别研究了该树脂配制的底、中、面涂层的常规性能及复合涂层的机械性能。同时对不同固化剂的影响和不同树脂的影响做了TG和DSC分析,结果表明,环氧改性有机硅树脂耐温性能较环氧树脂有较明显的提高,基本可用于高温涂料;环氧改性有机硅树脂可与纯有机硅树脂复配,有望形成具有更高耐温性能的涂膜。并且可通过复合固化剂的选用达到更佳的耐温性能和较好的物理机械性能。     

水性环氧防腐涂料的制备与性能研究

从4种不同的体系中优选出了高性能的水性环氧乳液及固化荆作为水性防腐涂料的成膜物质.采用傅立叶变换红外光谱考察了树脂与固化剂不同配比时涂层的组成,研究了水性环氧树脂及固化剂不同配比对涂层性能的影响,确定了水性环氧树脂乳液和固化剂的最佳质量比为2:1.正交试验结果表明,当复合铁钛粉、铁红和滑石粉的质量比为1:1:1.5时,涂层具有较好的性能;在此配比下,研究了颜填料体积浓度(Pvc)对涂层性能的影响,采用扫描电镜考察了不同PVC的涂层的截面形貌.结果发现,当PVC为47.7%时,涂层具有最佳性能.