共查询到19条相似文献,搜索用时 109 毫秒
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环氧树脂与丙烯酸酯单体的接枝共聚及其汽车阴极电泳涂料的性能 总被引:1,自引:1,他引:0
用环氧树脂与丙烯酸酯单体接枝共聚合,制备汽车阴极电泳涂料.研究了聚合条件对接枝体系的单体转化率(CR)、接枝率(GR)及接枝效率(GE),对产物环氧-丙烯酸酯树脂及其涂料漆膜性能的影响.用热重法(TG)和扫描电镜(SEM)对环氧-丙烯酸树脂及其涂料漆膜进行了分析.结果表明,在适宜的聚合条件下,接枝体系的CR、GR和GE分别达到100%、37.3%和87.0%;接枝率较高的环氧-丙烯酸树脂的外观,水溶性,其涂料的稳定性及漆膜的综合性能较好.环氧-丙烯酸酯树脂涂膜可在烘烤温度下自交联,漆膜的综合性能和外观均优于用三聚氰胺-甲醛树脂作交联剂的环氧-胺树脂漆膜. 相似文献
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环氧丙烯酸阴极电泳涂料的研究 总被引:2,自引:1,他引:1
通过接枝共聚的方法在环氧树脂主链上接枝合适的丙烯酸酯类单体,制备出自交联型阴极电泳涂料.研究了合成树脂的配方和工艺,同时对所得漆膜性能进行了测试.结果表明:选用E-44环氧树脂,用丙烯酸酯单体对其改性,以BPO作引发剂,用量为单体总量的0.4%-0.5%,接枝反应温度为110℃左右,反应时间为6 h左右时,树脂和漆膜均具有良好的性能. 相似文献
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合成了环氧-胺阳离子树脂和环氧-丙烯酸酯接枝阳离子树脂,以这2种树脂共混制备了有机挥发物含量低的复配树脂用作水性汽车阴极电泳涂料。采用FTIR、DSC、TG和SEM分析研究了几种树脂的化学结构、影响漆膜玻璃化温度(Tg)、热稳定性等的因素并对漆膜的的表面形态和断面形态进行了观测。结果表明,复配树脂漆膜的综合性能最好;当环氧-丙烯酸接枝树脂的质量分数为80%时,复配漆膜有单一的Tg,说明2种树脂相容,从而对提高复配漆膜的综合性能起到协同作用。 相似文献
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将改性环氧树脂和改性丙烯酸树脂混合乳化,合成了环氧–丙烯酸电泳漆。与原环氧型电泳漆相比,新合成的电泳漆的机械性能和耐盐雾性能均达到企业标准,人工加速老化试验400h后,漆膜完好,色差ΔE=0.24。按同样的原理,往原环氧电泳漆中加入丙烯酸树脂,使其转变成环氧–丙烯酸电泳漆。车架涂装生产证明,该电泳漆膜克服了原来涂层耐老化性差的问题。采用混合而非整槽更换的方式,既节约了成本,又利于环保。 相似文献
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环氧改性乙丙乳液及其乳胶漆的制备 总被引:3,自引:0,他引:3
采用特殊的乳化工艺使环氧树脂与醋酸乙烯、丙烯酸单体混溶进行共聚改性,所得的环氧改性乙丙乳液克服了乙丙乳液的缺点。介绍了环氧改性乙丙乳液及其内墙乳胶漆的配方、生产工艺以及性能指标。 相似文献
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底面合一涂料,不仅能够缩短施工时间,而且能够在一定程度上降低施工成本。环氧涂料因其耐腐蚀性好、耐候性差,常作为底漆使用。通过对丙烯酸树脂进行改性,使其具有活性胺基,将改性后的丙烯酸树脂作为固化剂与环氧树脂进行交联反应,制备了一种底面合一环氧涂料。该涂料不仅具有良好的耐腐蚀性能,而且具有优异的户外耐久性,具有广阔的应用前景。 相似文献
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New acrylate grafting epoxy antifouling resins containing benzoisothiazoline ketone (BIT) group were successfully synthesized, and their structures and performances were determined. Experimental data indicated that the new acrylate grafting epoxy antifouling resins have a strong bonding to the cured epoxy resin coating through chemical reaction and self-stratifying. And the paint prepared by using the new resin as matrix has excellent self-polishing and antifouling properties. Especially its antifouling period could be modified by changing the weight ratio of the usage of the mixed monomers and epoxy resin in the preparing process of the acrylate grafting epoxy antifouling resins. 相似文献
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Hongsheng Wang Fangfang Yang Aiping Zhu Ting Lu Fantao Kong Lijun Ji 《Polymer Bulletin》2014,71(6):1523-1537
The styrene acrylic/epoxy (SA/EP) complex latex with high content of epoxy resin was successfully prepared through emulsion polymerization initiated by both water-soluble and oil-soluble initiators. The resulting complex latex demonstrated regular spherical morphology with a diameter ranging 150–300 nm and with a narrow size distribution. The compatibility between epoxy and styrene acrylic improved due to the styrene acrylic grafting epoxy formation during grafting copolymerization. The factors influencing the structure and storage time of the complex latex were investigated and the corresponding mechanism was revealed. The SA/EP complex latex can form crosslinking structure with epoxy curing agent at room temperature. The crosslinked complex latex film shows good mechanical properties and excellent chemical resistance. These SA/EP complex latexes show great potential in developing high-performance aqueous paints and adhesive. 相似文献