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1.2.2 PUD涂层剂
1.2.2.1市场概况、消费区域及主要生产企业
纺织材料改性是现代工业中最重要的工艺过程之一.涂层技术是对织物或非织物进行功能化加工,在软质基材上用涂层胶,使基材表面形成一层连续的高聚物树脂薄膜,涂布后基材不但保持了原有特性,并增加了其他功能,提高了附加价值,近年在中国得到蓬勃发展.主要产品有PU人工皮革(分鞋面和服装革)、牛皮二层革(沙发革和箱包革)、涂层织物面料(防水透湿的各种休闲装、羽绒服、雨伞、野外帐篷、窗帘布、地毯背衬等). 相似文献
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以粉煤灰为基体材料,铝粉为相变介质,采用混合烧结法制备直径为15 mm的球形高温复合定形相变材料,利用浸釉法,采用四种烧结制度制备低温黑釉表面涂层,通过渗水率及微观表征评价其防水性能。研究表明,釉层烧结温度及釉浆浓度对釉层性能有显著影响。在釉层烧结温度为950 ℃的条件下,釉浆体积浓度高于90%时,由于坯釉之间膨胀系数差异过大,以及有机分解产物在釉粉末熔融前尚未完全释放而导致釉层龟裂和焦化;当体积浓度大于80%而小于90%时,釉层表面致密度增加,防水性能增强,但存在流釉现象。烧结温度为870 ℃及810 ℃,釉浆体积浓度为85%~95%时,釉面光泽度好且流釉减少,防水性能增强。烧结温度为750 ℃时,因温度过低使釉层间气体无法及时排出导致釉面针孔增多,防水性能下降。对比四种烧结制度下釉层性能,当釉层的最高烧结温度为810 ℃,浆料体积浓度为88%~92%时,涂层致密度高,与球形相变材料表面之间密着性好,防水性能突出,实验重复性良好。 相似文献
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史君儒 《精细与专用化学品》2014,(4):54-57
离型剂又称防黏剂,用于基材与压敏胶胶层之间,主要作用是保护涂布在基材上的压敏胶胶层,以防止压敏胶胶层被污染或黏住其他物品而失效.不论是标签、烘培纸、自黏信封,还是卫生用品,离型涂层是整个纸张行业不折不扣的幕后英雄.如果没有离型涂层,许多涉及压敏胶的日常应用都不会存在. 相似文献
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将饱和配位铕(Ⅲ)配合物作为转光剂添加到双组份丙烯酸涂料中,采用刮棒涂布的方法分别在玻璃基材和PET基材上制备了转光涂层,并对其发光性能和透明性进行了研究。结果表明:转光涂层能有效吸收紫外光,在623 nm产生很强的红色荧光,涂布基材的选择会对转光涂层的激发波长和荧光发射强度产生影响,玻璃基材上的转光涂层较PET基材上的转光涂层具有更高的荧光发射强度。同时稀土配合物的加入不会对转光涂层的透过率和颜色产生明显影响,但随稀土配合物添加量的增加转光涂层的雾度会轻微上升,但均可以满足使用要求。 相似文献
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《合成材料老化与应用》2015,(4)
随着社会发展,防水透湿织物越来越受到重视。本文介绍了防水透湿涂层织物原理,常见涂布方法,通过测试防水透湿涂层织物的静电压、透湿性、防水性能,满足织物要求,防水透湿织物具有广阔的前景,是未来发展的趋势。 相似文献
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探索和开发出一种新型制备抗静电塑料方法。在PVC、PMMA或PC基材板(片)上,涂布有一层表面1 .0~1 .5μm厚的导电涂料的离型PET薄膜,叠放时导电涂料层向下与基材板接触,PET膜向外。为了提高导电涂层与基材板间的粘合强度,还可以在两层间加上一层粘合膜。 相似文献
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本文以食品包装材料常用环氧涂层和环氧改性聚酯涂层为例,利用附着力测试、 SEM、XPS和 EDS等分析表征方法,从涂层组成及结构、基材 -涂层的表面 -界面特性等角度出发,分析了不同树脂涂层对镀锡板基材附着性能的影响。研究发现:涂层树脂的种类不同,涂层对镀锡板基材的附着性能存在差异。论文还初步探究了环氧涂层和环氧改性聚酯涂层对镀锡板基材的附着机理。 相似文献
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《热固性树脂》2016,(6)
以近红外(NIR)吸收染料为光吸收剂,羟基丙烯酸酯为预聚物树脂,光学级聚酯(PET)薄膜为基材,采用湿法涂布的方式制备了宽波段近红外吸收涂层材料。通过透光率测定,TG-DSC和光学显微镜分析研究了涂层的光学性能以及耐热稳定性和耐紫外光老化性能。结果表明,当N660,N720,N800和N890的质量分数分别为0.4%,0.6%、0.8%和1.0%时,所制备的涂层具有良好的宽波段近红外吸收性能和较高的可见光透过率,其在660~930 nm宽波段的平均透光率低于0.2%,同时在380~600 nm可见光波段的平均透过率超过45%。此外,涂层具有较好的耐热稳定性,其热分解温度为257.8℃。添加质量分数0.2%的抗紫外老化剂后,涂层的耐紫外光辐照老化性能显著提高。 相似文献
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以聚丙二醇(PPG)和双酚A型环氧树脂为原料,使用特殊催化剂合成了水性环氧树脂涂料用疏水性剂基体,并在其中添加疏水性微粒子WS-12组成疏水化剂。使用该疏水化剂与水性环氧树脂、通用环氧树脂按一定比例混合调制成水性环氧涂料复合物,并研究和评价其固化物的力学性能及涂膜的相关性能。研究结果表明,当m(水性环氧树脂):m(疏水化剂):m(环氧树脂6002)=20:10:70时,树脂固化物及涂膜的力学与物理性能最佳。 相似文献
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Hannu Toivonen 《应用聚合物科学杂志》1981,26(12):4021-4033
A new type of urea resin prepared by copolycondensating N,N′-bis(methoxymethyl) urea with an alcohol containing allyl ether groups have been studied and found to have adequate drying properties when used for surface coating purposes. The drying behavior of the resins can be controlled by conventional drier metals, cobalt being an efficient catalyst. Calcium was found to have a synergetic effect with cobalt on drying, zinc and lead had no synergetic effect, and manganese and sodium hydroxide acted as drying inhibitors. Increasing the amount of allylic alcohol in the monomer mixture and higher molecular weight led to the formation of a faster drying resin. The molecular weight distribution of the resins was found to have an effect on the surface coating properties. It was found that for resins having an equal drying rate those with a broader molecular weight distribution had higher solution viscosities. Resins with a narrow molecular weight distribution were also found to be advantageous when formulating coating compositions containing a minimum concentration of solvents. 相似文献
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环氧改性水性聚氨酯涂料的合成与性能研究 总被引:34,自引:5,他引:34
采用环氧树脂与聚醚、二羟甲基丙酸(DMPA)和甲苯二异氰酸酯(TDI)反应制备水性聚氨酯涂料。研究发现随着所用的环氧树脂的环氧值的降低,改性水性聚氨酯涂膜的硬度和拉伸强度逐渐提高,断裂伸长率则随着降低。选用环氧值为0.44的环氧树脂所合成的改性水性聚氨酯的涂膜硬度达到玻璃硬度0.70;随着环氧树脂添加量增大,涂膜机械性能增加。采用后添加环氧树脂的合成工艺,可制备贮存稳定的水性聚氨酯乳液;凝胶渗透色谱(GPC)分析表明环氧树脂改性水性聚氨酯提高了聚氨酯的分子量。性能测试表明环氧改性水性聚氨酯涂料具有涂膜硬度高、耐水性好和耐溶剂性好等优点。 相似文献
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Hannu Toivonen 《应用聚合物科学杂志》1981,26(12):4035-4046
The surface coating properties of the air-drying urea resins prepared by polycondensating N,N′-bis(methoxymethyl) urea (BMMU) with trimethylolpropane diallylether (TMPDA) and 2-ethylhexanol (2EH) were studied. It was found that the thinnability of the ethanolic resin solutions with water decreased with increasing molecular weight and the degree of modification of the resins with TMPDA and 2EH. The viscosity of the ethanolic resin solutions increased with the molecular weight but was independent on the resin's degree of modification. The drying performance was improved with increasing molecular weight and decreasing modification with 2EH. The hardness of the paint films was proportional to the modification of the resins with TMPDA and the molecular weight. 2EH led to the plasticization of the coatings. The water resistance of the paint films was improved with increasing modification with 2EH and molecular weight of the resin. The analysis of the elastic properties of the hardened films was not possible due to the scatter of the experimental data. The comparison of the amino resin paints to some commercial paint products indicated that BMMU-based resins having good drying performance and adequate water resistance at the same time can be prepared. Neutral ethanolic and aqueous ethanolic resin solutions were found to have a good storage stability as determined by following the viscosities of the solutions and the hydrolysis resistance of the resins. 相似文献
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