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紫外光固化木器涂料性能研究——齐聚物对涂膜性能的影响 总被引:7,自引:1,他引:6
研究了环氧丙烯酸酯和聚氨酯丙烯酸酯系列齐聚物对紫外光固化木器涂料的性能影响。结果表明,齐聚物的结构和配比对涂膜的硬度、附着力、耐磨耗性等有显著影响,环氧丙烯酸酯和聚氨酯丙烯酸酯用量比例为30~40:70~60时,涂膜综合性能最佳。 相似文献
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室温固化丙烯酸酯胶黏剂由于适用期短,操作时间不够的问题限制了其在粘接较大面积材料中的应用。制备了一种适用期为40min的丙烯酸酯结构胶黏剂,并对其进行了含磷丙烯酸酯对适用期影响的研究,探讨了长适用期丙烯酸酯结构胶黏剂的耐温性能、耐热老化、耐水老化性能,采用热重分析对胶黏剂进行了分析。结果表明:含磷丙烯酸酯含量为3%时,胶黏剂适用期可达40min;制备的丙烯酸酯胶黏剂耐温性能较好,80℃和100℃剪切强度分别为11.75MPa、6.49MPa;丙烯酸酯胶黏剂经100℃老化8000h后,80℃和100℃剪切强度上升分别为14.04MPa、8.54MPa,室温和60℃剪切强度下降分别为14.76MPa、14.21MPa;在耐水老化8000h后,60℃和80℃剪切强度变化很小分别为17.62MPa、11.52MPa。 相似文献
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紫外光固化聚丙烯酸酯涂料的研究 总被引:4,自引:0,他引:4
合成了两种聚醚型聚氨醋二丙烯酸酯齐聚物(平均分子量分别为M=980,M=780)、E44型环氧树脂双丙烯酸酯齐聚物以及丙烯酸酯单体。将上述丙烯酸酯齐聚物与丙烯酸酯单体按一定组成比混合,再添加光敏剂,抗氧剂及流平剂等构成七种新型光敏涂科配方。这七种新型光敏涂料在紫外光辐射下,通过光敏剂的引发,皆可很快固化成膜。经测试固化膜具有优良的耐水,耐化学腐蚀性能以及适宜的物理性能。 相似文献
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将含有乙烯基的硅树脂利用溶液聚合法将其引入到丙烯酸酯分子链中,合成了有机硅树脂改性丙烯酸酯压敏胶。利用红外光谱对改性后的压敏胶进行了结构表征。对改性前后压敏胶的耐高低温冲击等性能、耐热老化性能及耐湿热老化性能进行比较,得出改性后的压敏胶性能优越。60℃下湿热老化1000h后改性压敏胶180°室温剥离强度为5.68N/25mm。对丙烯酸酯压敏胶、有机硅压敏胶、有机硅改性丙烯酸酯压敏胶的室温、高温性能及高低温冲击性能进行了比较,经高低温冲击后,丙烯酸酯压敏胶失去压敏性能,而硅树脂改性的丙烯酸酯压敏胶还具有一定的剥离强度,为10.32 N/25mm。 相似文献
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根据某飞机座舱透明件边缘连接处的要求,研制了一种座舱透明件边缘连接用改性丙烯酸酯胶黏剂。通过对改性丙烯酸酯胶黏剂适用期和不同固化条件对胶黏剂性能的影响进行研究,确定了胶黏剂的适用期、固化温度、固化时间等工艺参数;同时对胶黏剂对3号有机玻璃的应力-溶剂银纹性能的影响进行了研究,并对胶黏剂的耐介质性能、耐盐雾性能、耐温度冲击性能、低温老化性能、高温老化性能、湿热老化性能和紫外老化性能进行了考核,上述试验的研究和考核表明座舱透明件边缘连接用改性丙烯酸酯胶黏剂的施工工艺和综合性能可以满足某飞机座舱边缘连接处的使用要求。 相似文献
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采用盐碱共沉淀法制备镁铝水滑石,采用XRD、FT-IR和粒度分析等手段对合成样品进行分析和表征,利用静态热老化法和静态热稳定性实验研究了镁铝水滑石稳定剂在聚氯乙烯(PVC)中的热老化性能和热稳定性
能。实验结果表明:镁铝水滑石是良好的PVC热稳定剂和热老化剂,热稳定剂实验的最佳配方比为m(PVC)∶m(硬脂酸)∶m(镁铝水滑石)= 100∶2∶1.2;热老化实验的最佳配方为m(PVC)∶m[邻苯二甲酸二辛酯(DOP)]∶m(硬脂酸)∶
m(镁铝水滑石)=100∶70∶2∶2。 相似文献
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For improving the finishing performances of complicated three‐dimensional coated wood products (e.g., furniture) with some shadow zones in the absence of ultraviolet (UV) light, resulting in incomplete curing of UV coatings, the aim of this study was to investigate the characteristics and effects of curing process on the properties of epoxy acrylate UV/PU dual‐cured resin for wood coatings when compared with traditional UV and polyurethane (PU) coatings. The epoxy acrylate oligomer was synthesized for providing a double bond of acryloyl group and a secondary hydroxyl group. The UV/PU dual‐cured coating was formulated with epoxy acrylate resin/tripropylene glycol diacrylate (TPGDA) monomer by the weight ratio of 80/20, 3% dosage of benzil dimethyl ketal as a photoinitiator, and the NCO/OH mole ratio of 1.0. The aromatic polymeric diphenylmethane diisocyanate was used as a hardener. The films of the dual‐cured coating, obtained from UV‐cured or room temperature‐cured process, showed an excellent tensile strength, elongation at break, impact resistance, and lightfastness when compared with traditional UV and PU coatings; especially, the adhesion of UV/PU dual‐cured coating by UV‐cured process was better than that of traditional UV coating. It can therefore be concluded that the epoxy acrylate oligomer‐based dual‐cured coating could readily be used for complicated wood products finishing. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010 相似文献
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The adhesive and mechanical properties of epoxy resins modified with carboxyl terminated poly(2‐ethylhexyl acrylate) (CTPEHA) liquid rubber have been investigated as a function of the concentration of liquid rubber. CTPEHA was synthesized by the bulk polymerization technique. CTPEHA oligomer was prereacted with the epoxy and the modified epoxy networks were made by curing with an ambient temperature curing agent. The modified epoxy networks were evaluated with respect to their adhesive and mechanical properties. The optimum properties were obtained at about 10–15 phr (phr stands for parts per hundred parts of epoxy resin) concentration of modifier. Fracture surface analysis by optical microscopy (OM) indicates the presence of two phase microstructures. © 2000 Society of Chemical Industry 相似文献
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A novel UV‐curable epoxy acrylate resin containing arylene ether sulfone linkages: Preparation,characterization, and properties
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UV‐curing processes are used in industrial applications because of their advantages such as high‐speed applications and solvent‐free formulations at ambient temperature. UV‐curable epoxy acrylate resins containing arylene ether sulfone linkages (EAAES) were synthesized through the condensation of bis(4‐chlorophenyl)sulphone and bisphenol‐A, followed by end‐caping of epichlorohydrin and subsequently acrylic acid. UV‐cured coatings were formulated with epoxy acrylates, reactive diluents such as pentaerythritol tri‐acrylate and pentaerythritol dia‐crylate and photoinitiator. Fourier transfer infrared, 1H NMR, and thermal gravimetrical analysis were employed to investigate the structures and thermal properties of the EAs films. The introduction of EAAES into epoxy acrylate substantially improves its thermal properties and thermo‐oxidative stability at high temperatures. In addition, the acrylate containing arylene ether sulfone linkages can also improve pencil hardness and chemical and solvent resistance of the epoxy acrylate. The obtained UV‐curable epoxy acrylate containing arylene ether sulfone linkages is promising as oligomer for UV‐curable coatings, inks, and adhesives in some high‐tech regions. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 41067. 相似文献
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环氧树脂是应用广泛的热塑性高分子预聚物,只有加入固化剂后方能显示出优异的性能,因此固化剂对于环氧树脂的应用及对固化产物的性能发挥着巨大的作用。在环氧树脂固化剂中,又以反应型固化剂的固化效果比较优异且使用方便,品种众多。综述了反应型环氧树脂的固化剂的种类及反应机理,介绍了近年来国内外几种性能优异的反应型环氧树脂固化剂,其中包括多元胺类固化剂、酸酐类固化剂、多元硫醇类固化剂、咪唑类固化剂等,指出其发展趋势是环保型、耐高温、高强度、高耐久性及快速固化。 相似文献
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UV固化丙烯海松酸聚氨酯丙烯酸酯的合成及应用 总被引:1,自引:1,他引:0
以2,4-甲苯二异氰酸酯(TDI)、丙烯海松酸二甘醇聚酯二元醇和丙烯酸羟丙酯(HPA)为主要原料合成了可紫外光固化的涂料用丙烯海松酸聚氨酯丙烯酸酯(APAPUA)低聚物。对产物进行了红外表征,并考察了其光固化行为。测试了APAPUA固化膜的硬度、柔韧性及其他力学性能,同时考察了其热稳定性。结果表明,该低聚物固化膜铅笔硬度达到4H,附着力1级,耐冲击性55 cm,初始分解温度245℃,具有固化速度快,力学性能及耐热性优良等特点,可以作为价格低廉的耐热性低聚物应用于光固化涂料。 相似文献
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甲基丙烯酸接枝环氧树脂的制备与性能测试 总被引:1,自引:0,他引:1
通过丙烯酸类单体与环氧树脂接枝共聚反应,在环氧树脂中引入强亲水性基团-COOH,制备水性环氧乳液。探索了不同单体用量和加水温度对所得水性乳液的pH值、黏度、粒径、水分散性和储存稳定性的影响;考察了涂膜固化条件对涂膜的附着力、耐冲击性、耐水性的影响。试验结果表明,随着甲基丙烯酸用量增加,所制备的水性环氧乳液水分散稳定性增强,pH值降低,粒径变小;随着加水温度的增加,储存稳定性变差;固化剂含量占环氧树脂含量的15%和固化温度为120℃时,涂膜的外观、附着力、耐冲击性、耐水性等综合性能最好。 相似文献
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用液态含羧基丙烯酸酯低聚物改性环氧树脂 总被引:6,自引:0,他引:6
采用溶液聚合法合成了以丙烯酸丁酯、丙烯腈为主链结构的液态含羧基丙烯酸酯低聚物,用其对环氧树脂进行增韧改性,讨论了丙烯腈、丙烯酸以及丙烯酸酯低聚物质量分数对改性环氧树脂力学性能的影响,并研究了改性环氧树脂的微观形态和动态力学性能。结果表明,丙烯酸酯低聚物质量分数为5%时,丙烯酸丁酯/丙烯腈/丙烯酸(质量比)为75/20/5的改性环氧树脂的拉伸强度比纯环氧树脂提高4.3%;丙烯酸酯低聚物质量分数为10%时,该改性环氧树脂的冲击强度比纯环氧树脂提高近4倍,同时体系的耐热性能保持不变;环氧树脂改性体系呈两相结构,丙烯酸酯低聚物质量分数达到30%时,对环氧树脂的增韧效果变差;随着丙烯酸酯低聚物质量分数的增加,改性环氧树脂的玻璃化转变温度先升高后降低,其质量分数不超过10%时,改性环氧树脂的玻璃化转变温度高于纯环氧树脂。 相似文献
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Ling Chen Shuxue Zhou Shisen Song Bin Zhang Guangxin Gu 《Journal of Coatings Technology and Research》2011,8(4):481-487
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. 相似文献