共查询到19条相似文献,搜索用时 125 毫秒
1.
2.
在许多应用场合,高弹性材料无法耐受其在使用过程中所处的恶劣环境。要让模压高弹性零件能耐受不断恶化的环境,方法之一是在高弹性材料上涂覆防护性涂料。已经开发出具有耐热性、环保性、与橡胶及金属的粘合性、耐动态运动的柔顺性的室温固化型高弹性涂料。 相似文献
3.
4.
颜料对紫外光固化光纤涂料性能的影响 总被引:2,自引:0,他引:2
用聚氨酯丙烯酸酯与环氧丙烯酸酯预聚物按一定比例共混,制备紫外光固化光纤涂料,加入颜料制得着色光纤涂料。研究了颜料的类型及加量对光纤涂料性能的影响,试验结果表明;颜料的类型对光纤涂覆速度影响很大,而对其他性能影响较小。 相似文献
5.
6.
7.
8.
汽车工业中的聚氨酯涂料 总被引:2,自引:0,他引:2
聚氨酯涂料作为重要涂料品种,在涂料市场占据较大份额。因其涂膜具有良好的耐磨性、耐腐蚀性、耐化学品性、硬度大、高弹性等优点,在汽车涂料领域也具有广泛应用及良好的发展前景。本文针对聚氨酯涂料在汽车工业中的应用作一简要叙述。 相似文献
9.
10.
11.
12.
The dependence of adhesion and protective properties of coating systems on surface properties of epoxy intermediate coatings, aged and non-aged before an application of polyurethane topcoats, were examined. The intermediate coatings were aged 500 h in UV chamber. The surface free energy and polar groups were estimated after ageing. After applying polyurethane topcoats on aged and non-aged epoxy coatings, resistance to salt spray and thermal shocks were tested as well as internal stresses were measured before and after corrosion tests.The results showed that adhesion in coating systems with polyurethane topcoats applied on aged epoxy coatings depends strongly on the degradation degree of epoxy intermediate coatings and the value of generated internal stresses. Coatings with good adhesion retention in corrosion environments have good protective properties even when temporary blistering has occurred. 相似文献
13.
14.
以异佛尔酮二异氰酸酯(IPDI)、聚碳酸酯二醇-1000(PCDL-1000)、蓖麻油(CO)、季戊四醇三丙烯酸酯(PETA)为主要原料,使用丙酮法制备了一系列双重交联的CO基水性聚氨酯(CWPU)乳液。采用FTIR、紫外-可见分光光度计、铅笔硬度计、电子万能实验机、SEM、电化学工作站对CWPU薄膜进行了表征,测试了CWPU薄膜的拉伸性能、耐水性、耐磨性及耐腐蚀性,探讨了其耐腐蚀机理。结果表明,当CO含量(以乳液溶质总质量计,下同)为4%时,制备的薄膜CWPU的24 h吸水率仅为4.5%,对Q235钢板基底的附着力为0级,对Q235钢板基底的保护效率可达99.05%,表明所制CWPU薄膜具有优异的耐水、防腐蚀性能。 相似文献
15.
Vanesa García-Pacios José Antonio Jofre-Reche Víctor Costa Manuel Colera José Miguel Martín-Martínez 《Progress in Organic Coatings》2013
Waterborne polyurethane dispersions (PUDs) were synthesized with polycarbonates of 1,6-hexanediol of different molecular weight (500–3000 Da) and their properties, adhesion (Hatch adhesion) and coatings on stainless steel properties (Pencil hardness, Persoz hardness, gloss at 60°, chemical resistance, yellowness index) were characterized. The hatch adhesion of the polyurethane coatings to stainless steel was very good and decreased slightly by increasing the molecular weight of the polycarbonate of 1,6-hexanediol. Both the Pencil and Persoz hardness values of the coatings increased by increasing the hard segments content in the polyurethane, i.e. by decreasing the molecular weight of the polycarbonate of 1,6-hexanediol, whereas the gloss and the yellowness index were lower for the coatings obtained with the polycarbonate of 1,6-hexanediol of molecular weight of 500 Da. Very good chemical resistance against ethanol for all polyurethane coatings on stainless steel plates was obtained but for long time of ethanol in contact with the coating surface the chemical resistance decreased, more markedly for the polyurethane coating obtained with the polycarbonate of 1,6-hexanediol of higher molecular weight. In summary, the segmented structure of the waterborne polyurethane dispersion determined the properties of the polyurethane coatings obtained from them. 相似文献
16.
17.
18.
高弹性环氧-聚氨酯重防腐蚀涂料的研制 总被引:7,自引:2,他引:7
以弹性聚氨酯和环氧树脂为复合基料,制备了弹性强,低温施工性好,耐候、耐水、耐酸碱、耐骤冷骤热、耐化学药品性优异的防腐蚀涂料。介绍了该涂料的配方设计、生产方法、产品技术指标和用途。 相似文献
19.
低表面能材料上海洋生物附着的研究 总被引:8,自引:4,他引:8
考察了不同表面状态的聚四氟乙烯材料和含有机氟、有机硅涂层的防污性能。低表面能材料上的污损生物附着不牢。聚氨酯、醇酸、氯醋乙烯等树脂为基料的涂层防污性差;而涂层中有机硅橡胶的含量比聚四氟乙烯更有利于防止海洋生物的附着。 相似文献