共查询到20条相似文献,搜索用时 156 毫秒
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环氧改性有机硅树脂的合成及在涂料中的应用 总被引:7,自引:0,他引:7
1 前 言有机硅涂料是 70年代发展起来的一类耐高温涂料 ,一般耐温区间为 2 0 0~ 4 0 0℃ ,国外国类产品可长期耐 50 0~ 70 0℃。由纯有机硅树脂制备的此类涂料虽然耐热性优良 ,但常温干燥性能、耐溶剂性能、附着力等不理想。用环氧将有机硅树脂加以改性 ,所得树脂既耐高温 ,又耐腐蚀 ,从而获得广泛的应用。2 实 验2 .1 有机硅中间体的合成有机硅树脂是由不同官能度的单体按一定的配比制得。三官能团单体能提高交联度 ,二官能团单体能增进柔韧性 ,四官能团单能改善常温干燥性能。有机硅树脂的性能与R/Si和CH3/C6H5值密切相关 ,… 相似文献
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有机硅改性丙烯酸树脂夜光涂料 总被引:5,自引:1,他引:5
用有机硅改性丙烯酸树脂作为主要成膜物质,将稀土硫化锌夜光颜料和铝酸锶铕夜光颜料分散于有机硅改性丙烯酸树脂中制成夜光涂料。结果表明,所得有机硅改性丙烯酸树脂稀土硫化锌夜光涂料和有机硅改性丙烯酸树脂铝酸锶铕夜光涂料的涂抹性能好,耐水性、耐碱性、耐候性和耐沾污性强,夜光性能好,余辉亮度强且余辉时间长,为优质的夜光涂料。 相似文献
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环氧改性氟树脂涂料研究 总被引:6,自引:0,他引:6
用环氧树脂改性偏二氟乙烯-四氟乙烯-六氟丙烯共聚物(氟树脂246),可以大大提高氟树脂在底材表面的附着力。实验结果表明,改性氟树脂涂料有良好的机械性能和耐有机溶剂性能,具有广泛的应用前景。以大 相似文献
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以乙烯基三乙氧基硅烷(ETOS)、三氟氯乙烯(CTFE)、十一烯酸(UA)、羟丁基乙烯基醚(HBVE)、丁基乙烯基醚(BVE)、环己基乙烯基醚(CHVE)为原料,通过溶液聚合后乳化的方法制备了高性能可常温固化的有机硅改性CTFE氟树脂乳液。研究了单体、乳化剂对有机硅改性CTFE氟树脂乳液性能的影响,对有机硅改性CTFE氟树脂乳液膜的硬度、附着力、冲击强度以及耐沸水煮性进行分析,并对其进行了FT-IR、DSC、TGA和SEM表征。结果表明,有机硅改性CTFE氟树脂中BVE和CHVE摩尔比为1∶1、ETOS用量为5%(wt,质量分数)时,乳化后有机硅改性CTFE氟树脂拥有良好的性能,成膜后硬度为2H、附着力为0级、冲击强度高于50kg·cm,耐沸水煮性良好,玻璃化转变温度为28.66℃。 相似文献
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综述了国内外利用丙烯酸酯、环氧树脂、有机硅、纳米粒子等对聚氨酯树脂改性在涂料中的应用进展;对近期聚氨酯涂料的改性作了重点描述,展望了改性聚氨酯涂料的研究方向及应用前景. 相似文献
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紫外光固化阴极电泳涂料研究进展 总被引:1,自引:0,他引:1
介绍了UV固化阴极电泳涂料的优良特性及其应用前景,综述了国内外关于UV固化阴极电泳涂料的研究进展,其中包括基体树脂、光引发剂和涂装固化工艺的近期研究状况,并对今后UV固化阴极电泳涂料研究过程中的热点问题以及未来的研究趋势作了展望。 相似文献
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We study the composition of the gel fraction, water absorption, and impedance characteristics of epoxy coatings modified with
petroleum polymeric resin treated with maleic anhydride. It is shown that modified epoxy coatings are characterized by higher
water resistance and better protective properties in acid media. We determine the optimal amount of the petroleum polymeric
modifier and demonstrate the possibility of improvement of the corrosion resistance of modified epoxy coatings by subsequent
thermal treatment.
Karpenko Physicomechanical Institute, Ukrainian Academy of Sciences, L'viv. Translated from Fizyko-Khimichna Mekhanika Materialiv,
Vol. 32, No. 4, pp. 81–85, July–August, 1996. 相似文献
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In this paper, we demonstrate that thin layers of polymer coatings can be used to self-assemble pillars into stable microstructures. Polymer coatings are deposited onto elastomeric pillars using solventless initiated chemical vapor deposition and capillary forces are used to collapse the coated pillars into microstructures. The location of pillar collapse can be controlled by patterning regions of hydrophilicity and hydrophobicity. Poly(hydroxyethyl methacrylate) and poly(methacrylic acid) coatings stabilize the self-assembled microstructures by providing an adhesive force through solvent bonding. These solvent bonds allow the response of the microstructures to be tuned by varying the thickness of the polymer coating and the solubility parameter of the solvent. The coating process described in this paper is substrate-independent and therefore can be applied to pillars composed of any material. 相似文献
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Zinc phosphate coatings obtained from phosphating baths modified with long-chain flotation surfactants, were characterized by scanning electron microscopy. X-ray diffraction and X-ray photoelectron spectroscopy techniques. The results of these characterization studies were correlated to the mechanism proposed to explain the influence of these additives on the nature and quality of the phosphate coatings obtained in their presence, as well as to explainthe behaviour of these coatings in aggressive environments. These studies indicate that the surfactant additives not only control the initial nucleation process but also participate during the subsequent stages of coating deposition, and regulate its growth. 相似文献
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