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环氧改性含磷苯丙防锈乳液的合成 总被引:3,自引:0,他引:3
采用常规乳液聚合方法,以环氧树脂改性含有磷酸酯功能单体的苯丙乳液来制备水性防锈乳液。苯乙烯(St)、丙烯酸丁酯(BA)等为共聚单体,引入环氧树脂及具有抗闪蚀功能的磷酸酯功能单体,考察了乳化剂、引发剂、环氧树脂、磷酸酯单体不同用量对乳液及其漆膜的影响,并对乳液的粒径、固含量及漆膜的耐盐水性、附着力等性能进行测试,逐步优化聚合工艺来合成具有高效防锈的新型环氧防锈乳液。研究表明,乳化剂用量、引发剂用量、环氧树脂用量、磷酸酯单体用量分别为单体总量的1.5%、0.6%、7%、3%时,可制得性能较好的水性环氧改性含磷苯丙防锈乳液。 相似文献
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水性含氟耐候防锈涂料的制备及应用 总被引:1,自引:0,他引:1
采用核壳乳液聚合法,并加入磷酸酯功能单体(PAM-100),制备了氟单体用量为5%的含氟丙烯酸酯聚合物乳液。分析了含氟单体、乳化剂、磷酸酯功能单体等因素对乳液合成的影响。用合成的乳液配制了水性防锈涂料,并对其性能进行测试。 相似文献
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阳离子聚合物乳液的合成及其在涂料染色中的应用 总被引:1,自引:0,他引:1
采用无皂乳液聚合的方法,选择合适的阳离子单体和引发剂,合成了稳定的阳离子型聚合物乳液.分析了软单体BA、硬单体St、阳离子单体DMC、引发荆APS用量和搅拌速度等因素对乳液粒径及稳定性的影响.结果表明,当阳离子单体、软、硬单体用量分别为13.14%、6.18%和2.32%,引发剂用量为0.5%,搅拌速度为250 r/min时,合成的乳液粒径为383.3 nm,具有较好的稳定性.应用于涂料染色织物,阳离子聚合物乳液具有比商品粘合剂高的干湿摩擦牢度.电子显微镜的观察结果说明,阳离子乳液能够在织物表面形成更完整均匀的聚合物薄膜. 相似文献
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综述了合成阳离子丙烯酸系聚合物乳液的乳化剂、引发剂及单体体系和聚合方法,介绍了阳离子乳液的性质和应用。 相似文献
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A kind of polymerizable surfactant, methacryloyloxyethylhexadecyldimethylammonium bromide (DMHB) was used to synthesis soap‐free cationic emulsion with styrene (St), methyl methacrylate (MMA), and methacryloyloxyethyltrimethylammonium chloride (MATMAC) by emulsion polymerization using 2,2′‐azobis(isobutylamidine hydrochloride) (AIBA) as a cationic initiator. The effects of polymerizable surfactant concentration, initiator concentration, and reaction temperature on the conversion of monomer were investigated. The results indicated that the rate of polymerization could be expressed as Rp = kp[AIBA]0.42[DMHB]0.45 and the apparent activation energy (Ea) was 83.42 kJ/mol. The particle size, ζ potential, and apparent charge density of cationic latices were also measured. The average diameter of copolymer particles decreased with increasing DMHB, MATMAC, and AIBA content; the charge properties of the particles were decided by the DMHB, MATMAC, and AIBA content. The polymerization mechanism is discussed. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 1111–1116, 2006 相似文献
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Jose Ramos 《Polymer》2006,47(4):1405-1413
A mathematical model for a semicontinuous seeded cationic emulsion polymerization was developed. The model includes the most distinctive features of the copolymerization of a cationic hydrophilic monomer with a hydrophobic one, including polymerization of the hydrophilic monomer in the outer shell of polymer particles and in the aqueous phase, and the possibility of having radical concentration profiles in the polymer particles.The reactions were carried out by means of a semicontinuous seeded cationic emulsion polymerization under starved conditions for styrene, which was the main monomer employed.The model predicts the evolution of the fractional overall conversions, the thickness of the outer shell, the total surface charge density and the partial conversions for the semicontinuous seeded cationic emulsion polymerization of styrene and aminoethyl methacrylate hydrochloride. Furthermore, the model can distinguish between the surface charge density provided by the cationic monomer than that given by the cationic initiator. Therefore, this model can predict the best conditions to obtain well-defined latexes with specific amounts of surface amino and amidine groups useful for immunoassays. 相似文献
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采用反相乳液法合成了液体石蜡/span80-Tween80/水/烯酰胺-甲基丙烯酰氧乙基三甲基氯化铵共聚物阳离子反相乳液,通过主体实验分别考察了油水体积比、乳化剂浓度、引发剂浓度、单体配比、单体浓度对聚合反应的影响。最后通过正交实验确定了合成反应的最适宜条件。 相似文献
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以可聚合阳离子含氟表面活性剂N-(乙酸全氟辛基乙基酯)-N-(乙醇丙烯酸酯)二甲基溴化铵(PF8DM)为乳化剂,进行含氟丙烯酸酯的细乳液聚合研究,考察了PF8DM用量对单体转化率和凝胶率的影响,PF8DM用量对乳液的稳定性和表面性能的影响;分别采用PF8DM和十六烷基三甲基溴化铵作为乳化剂考察其对乳胶膜性能的影响。结果表明,当PF8DM含量为单体总质量的4%时,单体转化率达95%,凝胶率为0.6%;所得乳液具有优异的贮存、稀释、离心稳定性;当PF8DM用量为单体总质量的6%时得到的乳胶膜接触角达118.6°。在总含氟量相同的条件下,采用PF8DM为乳化剂制备的含氟丙烯酸酯乳液,其乳胶膜的吸水率大大降低,拒水性也明显增强。 相似文献
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采用酮肼(DAAM-ADH)和有机硅单体A-171为交联体系,以苯乙烯(St)、丙烯酸丁酯(BA)、甲基丙烯酰氧乙基三甲基氯化铵(DMC)为主要单体原料,采用氧化还原引发体系,通过乳液聚合方法合成了一种自交联型阳离子苯丙乳液用于纸张表面涂料;通过对纸张施胶度和环压指数的测定,得出当乳化剂用量占单体总量的3%(质量分数,后同),m(St):m(BA)=3:1,DAAM—ADH用量占单体总量的3%,有机硅用量占单体总量的2%时,制备的阳离子树脂用于纸张表面涂料,使纸张的施胶度从24s提高到60s,环压指数从5.1N·m·g^-1提高到8.6N·m·g^-1,施胶效果显著。 相似文献