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以中长油度醇酸树脂、丙烯酸(酯)类单体等为主要原料,以过氧化苯甲酰为引发剂,通过先溶液聚合再高速乳化工艺,合成了具有核壳结构的新型水性醇酸 /丙烯酸复合分散体,并对其漆膜耐水性影响因素进行了研究。重点考察了醇酸树脂油度、醇酸树脂与丙烯酸酯单体比例、丙烯酸酯硬单体的比例、丙烯酸及丙烯酸十八酯用量对分散体粒径及漆膜耐水性的影响。结果表明:醇酸树脂油度为 57. 5%,醇酸树脂与丙烯酸酯类单体质量比为 6. 3∶3. 7,丙烯酸酯硬单体 MMA和 St质量比在 8∶2至 6. 5∶3. 5之间,丙烯酸用量在 3. 22%~7. 70%之间,丙烯酸十八酯用量 3. 03%时,复合分散体漆膜耐水性及综合性能较优。 相似文献
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以油酸、季戊四醇、邻苯二甲酸酐、苯甲酸为原料,采用丙二醇甲醚醋酸酯(PMA)为溶剂合成了基体醇酸树脂;用过氧化苯甲酰、过氧化苯甲酸叔丁酯双引发剂、分步引发烯类单体共聚,制备了一种苯丙烯树脂,并对醇酸树脂改性制得了水性醇酸树脂。考察了不同油度对水性醇酸树脂结构与性能的影响。通过FTIR、TGA、DLS分别对树脂的结构、稳定性和乳液性能进行了表征。测定了树脂的漆膜性能,包括耐水性、表干时间、硬度、电化学性能。结果表明,n(油酸)∶n(季戊四醇)∶n(邻苯二甲酸酐)∶n(苯甲酸)=1∶1∶1∶0.3,油度为47%时,聚合物乳液粒径为74.4 nm,PDI为0.262,胶膜的吸水率为14.5%,接触角为70.87?,有较好的耐水性。改性醇酸树脂的表干时间缩短为0.5 h,实干时间缩短为24 h,硬度达HB。 相似文献
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通过对3种不同配方与工艺的醇酸树脂的合成进行实验,并将该3种树脂按相同比例制备成相应的醇酸漆,对3种漆的漆膜性能进行检测,旨在对比不同配方与工艺下合成的醇酸树脂对醇酸涂料各项性能的影响,为醇酸漆生产企业和使用单位提供参考与选择。 相似文献
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以五氧化二磷与甲基丙烯酸羟丙酯自制了功能性磷酸酯单体,并与丙烯酸、甲基丙烯酸甲酯、丙烯酸丁酯、丙烯酸羟丙酯等单体,以偶氮二异丁腈为引发剂,在乙二醇丁醚中进行聚合,合成了改性丙烯酸树脂。将其与固化剂氨基树脂混合即得一种水性防锈漆。考察了原料用量对漆膜性能的影响,得到最优制备条件为:甲基丙烯酸羟丙酯与五氧化二磷的摩尔比为2.0,磷酸酯用量(占单体总质量,后同)5%,丙烯酸用量20%,甲基丙烯酸甲酯用量35%。所得漆膜可耐5%Na Cl溶液浸泡30 d,冲击强度50 kg·cm,附着力0级,柔韧性3 mm,铅笔硬度HB。 相似文献
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Hybrid waterborne alkyd–acrylic dispersions with solid content of 40%, free from any surfactant and exempt of any organic solvent, were successfully synthesized by a melt co-condensation reaction between an acrylic prepolymer bearing carboxylic groups and a long-oil alkyd resin. Spontaneous emulsification of the ensuing hybrid resin was achieved by the addition of an aqueous ammonia solution that neutralized the carboxylic functions. The key role of the carboxylic groups on the stabilization process and on the storage stability of the dispersion was assessed and it was shown that the insertion of anhydride moieties within the acrylic prepolymer ensured the efficient coupling between the acrylic and the alkyd resin and prevented the phase separation. These dispersions are easy to implement and might be used to prepare high quality zero VOC coatings in terms of drying time, stability and gloss. The most stable dispersion was also used in the formulation of air-drying waterborne lacquers and their coating properties were evaluated. 相似文献
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以紫胶、蓖麻油、顺丁烯二酸酐、三羟甲基丙烷、偏苯三酸酐为原料,采用熔融法合成了水性醇酸树脂。研究了紫胶用量、蓖麻油酸加量、脂肪酸类型、多元醇类型和酯化时间对树脂性能的影响,确定了最佳的工艺参数。所得醇酸树脂产品的贮存稳定性、耐水性、耐冲击性、硬度、柔韧性等综合性能良好。 相似文献
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从改进树脂综合性能着手,研究了水性醇酸树脂的合成工艺。确定了以熔融法和分步加料来制备醇酸树脂。以紫胶部分替代三羟甲基丙烷,顺丁烯二酸酐/偏苯三酸酐部分替代苯酐,所得水性醇酸树脂的干燥性能、硬度和柔韧性等性能得以提高。紫胶用量以5%为宜。 相似文献
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In this work, a modified alkyd resin (basic alkyd resin) was synthesized using maleic anhydride (MAH) to replace part of phthalic anhydride (PA) to achieve the target product acrylate-grafted-alkyd hybrid resin. The resin was then dispersed in water to form water-reducible emulsion. The properties were examined, including the extent of neutralization of final emulsion, ratio of MAH/PA in basic alkyd resin, mole ratio of basic alkyd resin to modified vinyl monomers, mole ratio of vinyl monomers (MMA/St/AA) on water dispersion stability of emulsion, particle size, drying time and mechanical properties. The optimal synthesis conditions produced a final emulsion particle size of 81.1 nm with good storage stability, hydrolytic stability and shorter drying time. The optimized synthesis conditions were identified as 80% neutralization, 1:0.8 mole ratio of basic alkyd resin to modified monomers, 4:3:2 modified monomers MMA/St/AA and 0.18 mole ratio of MAH/PA. 相似文献
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In this study, water reducible alkyd resins containing different amounts of colloidal silica were synthesized for the first time. In order to achieve this, alkyd resin, which has an oil content of 35%, was prepared with tall oil fatty acid, isophthalic acid, trimellitic anhydride, and trimethylolpropane. The alkyd resin was neutralized with triethylamine, and was dissolved in an isobutyl alcohol-isopropyl alcohol-butyl glycol mixture to produce 75% (wt.) solution, which was called stock alkyd resin. The stock alkyd resin was diluted with water to 50% (wt.) concentration with water and colloidal silica mixture in order to prepare an alkyd solution containing 0%, 5%, 10%, 15% and 20% colloidal silica. Then the effect of the silica nanoparticle addition on the surface coating properties, thermal behaviors and surface morphologies of water reducible alkyd resins was investigated. As a result, the addition of colloidal silica has improved surface coating properties and thermal behaviors of nanocomposite water reducible alkyd resin. 相似文献
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介绍了用苯甲酸改性的含羟基醇酸树脂和甲苯二异氰酸酯(TDI)预聚物的合成工艺,以及由二者制成醇酸型聚氨酯涂料的方法;讨论了合成的醇酸树脂、TDI预聚物、固化剂种类和用量、溶剂、助剂和颜填料对涂料及涂膜性能的影响。制备得到的改性醇酸家具涂料成本不仅比聚酯涂料低,而且其涂膜的光泽高、丰满度好、硬度高、干性好,施工性能也有所改善。 相似文献