高固体分环氧树脂涂料耐酸隆的研究

采用低分子量环氧树脂、胺类固化剂配制高固体分环氧树脂涂料。讨论了室温固化条件下环氧树脂分子量、固化剂类型、不同酸性介质对涂层耐酸性的影响。     

新型水性防腐涂料的开发与研究

采用苯乙烯、丙烯酸及其酯类作单体,环氧树脂改性,非离子和阴离子表面活性剂作混合乳化剂,进行乳液聚合,制备环氧树脂改性丙烯酸树脂乳液。以此乳液配制兼具丙烯酸树脂涂料和环氧树脂涂料优点的水性防腐涂料     

低分子量聚酰胺树脂

一、前言我厂生产双酚A型环氧树脂多年,为了方便用户就地配套,厂科研室研制了低分子量聚酰胺树脂,作为环氧树脂的固化剂和增韧剂。它是用植物油脂肪酸的二聚体和乙撑多胺缩聚而成的。由于该树脂分子结构中,含有较长的脂肪酸碳链和活泼氨基,树脂具有良好弹性和附着力,可以与环氧树脂产生交联反应,并且施工工艺简单,配方不严格。它主要用于配制环氧树脂漆和触变型涂料,及环氧树脂型双组分胶粘剂,如“东风牌万能胶”已畅销全国,它和环氧树脂配制浇注塑料可用于电器和机械工业等方面。     

环氧树脂阻燃方法

环氧树脂阻燃方法可分为添加型和反应型两大类,本文主要介绍环氧树脂阻燃机理和环氧树脂阻燃方法,在每一种阻燃方法中除了叙述阻燃配方外,还相应说明有关配制方法.     

利用Ps制备水溶性防腐涂料

以废聚苯乙烯(PS)和丙烯酸及其酯类为单体,用环氧树脂进行改性,非离子和阴离子表面活性剂作混合乳化剂进行乳化聚合,制备环氧树脂改性丙烯酸树脂乳液,配制出兼具丙烯酸树脂涂料和环氧树脂涂料优点的水性防腐涂料.     

有关电子元件用环氧树脂配制若干问题的讨论及配方实例

消除或降低环氧树脂固化过程带来的内应力,提高固化后环氧树脂的阻燃、耐水和耐湿热老化等性能是电子元件用环氧树脂配制研究中面临的几个问题.本文讨论了解决这些问题的一些措施及其机理,示出两种环氧树脂绝缘材料配方实例及其工艺方框图.     

光固化涂料用低粘度环氧丙烯酸酯的研究

采用双羟基化合物与环氧树脂进行反应,制取低粘度改性环氧树脂,然后用丙烯酸酯化,制得光固化涂料用低粘度环氧丙烯酸酯。研究了催化剂类型和用量对环氧树脂改性反应,以及不同结构、不同链长双羟基化合物和双羟基化合物与环氧树脂当量比对环氧丙烯酸酯粘度及其配制的光固化涂料的性能影响。确定了环氧树脂改性反应和丙烯酸酯化反应的最佳条件。     

环氧树脂砂浆在水利工程上的应用

文章主要介绍了环氧树脂材料性能,环氧树脂砂浆(环氧砂浆)的配制工艺,环氧砂浆应用于水利工程的优缺点,它的施工要求及环氧砂浆在水利工程中的应用等。     

阻燃环氧树脂研制总结

通过合理选择环氧树脂、阻燃剂、着色剂、紫外线吸收剂等,配制成阻燃环氧树脂,用于浸渍包封有机薄膜电容器,性能达到进口料水平。取得显著的经济效益和社会效益。     

新型阴极电泳漆的合成与影响园素

采用环氧树脂作为环氧基组分,加入聚酰胺及甲苯二异氰酸酯作为固化剂,配制成水溶性阴极电泳漆。     

我国特种环氧树脂生产和研究进展

介绍了我国环氧树脂的生产消费概况,分析了溴化环氧树脂、邻甲酚醛环氧树脂、双酚F环氧树脂、酚醛环氧树脂和双酚A酚醛环氧树脂等特种环氧树脂的生产和研究进展,提出了我国发展环氧树脂的见解.     

环氧树脂胶粘剂的耐热改性研究进展

介绍和评述了环氧树脂胶粘剂耐热和增韧改性的若干体系,如高官能度环氧、环氧-酚醛、环氧-丁腈、环氧-芳胺、环氧-芳胺-双亚胺、环氧-链烯基酚-双亚胺、环氧-双羟、羧亚胺、环氧-聚酰亚胺和环氧-氰酸酯等的研究和应用情况。     

Laboratory investigation of the properties of asphalt modified with epoxy resin

Epoxy asphalts were prepared by mixing styrene–butadiene–styrene (SBS) modified asphalt with epoxy resin. The curing process and morphology of epoxy asphalts were characterized by infrared spectroscopy and fluorescent microscope, respectively. The effects of epoxy resin contents, ratio of curing agent to epoxy resin and curing temperature on properties of epoxy asphalt were investigated. Results indicated that epoxy resin and epoxy asphalt showed similar curing efficiency. Epoxy asphalts can be cured at 120 or 60°C and its viscosity at 120°C can meet the demands of asphalt mixture mixing and paving. The chemical reaction of epoxy resin in epoxy asphalt is slow and reaction occurs not only with the curing agent but also carboxylic acid in epoxy asphalt. The microstructure of epoxy asphalt transforms from the dispersed structure to networks structure with epoxy resin content increasing and phase transition starts when 30 wt % epoxy resin present in asphalt. The softening point and tensile strength of epoxy asphalt increased with epoxy resin contents increasing. The softening point and tensile strength of epoxy asphalt were markedly improved when epoxy resin content was more than 30 wt %, which is attributed to formation of continuous structure of epoxy resin. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

2005-2006年国外环氧树脂工业动态

介绍了国外环氧树脂工业2005-2006年的价格变化,世界各大生产厂商,如美国陶氏化学品公司、捷克Spolchemie公司、日产化学工业公司、日本日立化学品公司、三井化学品公司和沙特的石化生产商Arabian Industrial Development(NAMA)围绕环氧树脂及其配套原料的投资建设动向,日本环氧树脂生产量及在涂料、电气、土木、建筑、粘接及其他领域的消费状况。同时,对新型水性环氧固化剂、具有剪切稳定性的水性环氧分散体、RenPaste无缝成型(SMPs)船舶工业的最新模型树脂及耐热冲击性和耐化学品性、低收缩率、高性能、高强度新型环氧胶黏剂、导电胶黏剂、超高固含量厚膜环氧涂料产品以及柔性环氧-硅氧烷杂混树脂等新领域产品的开发进展分别进行了介绍。     

Synthesis of new flame-retarding epoxy resin based on 3′, 5′, 3″, 5″-tetrabromophenolphthalein

New flame-retarding epoxy is synthesized by reacting 3′, 5′, 3Prime;, 5″-tetrabromophenolphthalein (TBPP) with epichlorohydrin and characterized in comparison with commercially available tetrabromobisphenol-A(TBBA) epoxy on their flame retardancy and thermostability. TBPP epoxy show better results in promoting flame resistance than TBBA epoxy. However, TBPP epoxy exhibits a greater effect on thermal decomposition temperature. The order of char yield at 800°C under nitrogen for the cured products is TBPP epoxy > phenolphthalein (PP) epoxy > TBBA epoxy. Meanwhile, there is a linear relationship between oxygen index and char yield for cured products of TBPP-PP epoxy and TBBA-BA epoxy systems.     

新型环氧树脂、固化剂、复合材料及纳米技术进展

介绍了新型庶糖环氧树脂、液晶环氧树脂、耐温耐湿环氧树脂及其组成物、改性物 ,新型固化剂如多芳环胺类固化剂、潜伏固化促进剂 ,新型复合材料 ,即碳纤维、玻璃微珠、硅充填、石墨环氧复合材料及纳米复合材料最新进展     

2009-2010年国外环氧树脂工业进展

介绍了2009-2010年国外厂商环氧树脂及其固化剂的产能扩充,企业兼并重组以及环氧树脂市场的价格变化情况。综述了新型环氧树脂的开发以及环氧树脂胶粘剂,灌封料,涂料,电子材料专用环氧体系及环氧复合材料等领域的技术进展。     

Electrical properties and morphology of polypropylene/epoxy/glass fiber composites filled with carbon black

The volume resistivity and percolation thresholds of carbon black (CB) filled polypropylene (PP), PP/epoxy, and PP/epoxy/glass fiber (GF) composites were measured. The morphology of these conductive polymer composites was studied with scanning electron microscopy (SEM). The effects of the GF and epoxy contents on the volume resistivity were also investigated. The PP/epoxy/GF/CB composite exhibited a reduced percolation threshold, in comparison with that of the PP/CB and PP/epoxy/CB composites. At a given CB content, the PP/epoxy/GF/CB composite had a lower volume resistivity than the PP/CB and PP/epoxy/CB composites. SEM micrographs showed that CB aggregates formed chainlike structures and dispersed homogeneously within the PP matrix. The addition of the epoxy resin to PP resulted in the preferential location of CB in epoxy, whereas in the PP/epoxy/GF multiphase blends, because of the good affinity of CB to epoxy and of epoxy to GF, CB particles were located in the epoxy phase coated on GF. The decreased percolation threshold and volume resistivity indicated that conductive paths existed in the PP/epoxy/GF/CB composite. The conductive paths were probably formed through the interconnection of GF. Appropriate amounts of GF and epoxy should be used to decrease the volume resistivity and provide sufficient epoxy coating. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 1142–1149, 2005     

聚氨酯改性环氧树脂胶黏剂的研究与应用进展

简要介绍了环氧树脂胶黏剂的特性,指出聚氨酯改性环氧树脂的主要目的是提高其韧性。分别论述了几种常用的聚氨酯增韧改性环氧树脂胶黏剂的方法,包括端胺基／端羟基／端异氰酸酯基／端环氧基聚氨酯预聚体增韧改性环氧树脂,聚氨酯环氧树脂接枝共聚改性环氧树脂以及聚氨酯互穿聚合物网络增韧环氧树脂,其中详细介绍了聚氨酯互穿聚合物网络增韧环氧树脂技术。同时,对国内聚氨酯改性环氧树脂胶黏剂的主要应用进行了介绍,并指出了我国目前聚氨酯改性环氧树脂胶黏剂的不足和发展方向。     

Synthesis and properties of cationic resins derived from aniline-modified epoxy resins and various amines

Aniline-modified epoxy resin which contains tertiary amine in the middle of the polymer chain was synthesized by the reaction of aniline and epoxy resin. The resulting aniline-modified epoxy resin and two commercial epoxy resins with different epoxy equivalent weights were reacted with 2-ethylhexanol-blocked toluene diisocyanate (2-EH-blocked TDI) to obtain thermally crosslinkable epoxy resins. These epoxy resins were subsequently reacted with various secondary amines and partially neutralized with acetic acid to give thermally crosslinkable cationic resins. The resulting cationic resins were dissolved in suitable solvents and mixed with deionized water to form emulsions. The crosslinking properties, emulsion, and electrodeposition properties of these resins were studied in some detail. The electro-deposition yields of the emulsions prepared from aniline-modified epoxy resins were higher than those of other emulsions. The crosslinked films prepared from aniline-modified epoxy resins were also glossier than those prepared from commercial epoxy resins. High deposition yield and high glossiness were the characteristic properties of the aniline-modified epoxy resins. Thermal properties were not affected by aniline-modified epoxy resins.