共查询到19条相似文献,搜索用时 171 毫秒
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以亚麻油、季戊四醇、三羟甲基丙烷、氢氧化锂、邻苯二甲酸酐、苯甲酸、偏苯三酸酐、乙二醇丁醚和三乙胺为主要原料,采用成盐法合成了一种自干型水性醇酸树脂。考察了油度、中和前树脂酸值、pH、助溶剂种类和醇超量对水性醇酸树脂及以其所制面漆性能的影响,得到最优制备条件为:pH控制在8左右,中和前树脂的酸值(以KOH计)为50~60 mg/g,油度为50%,乙二醇丁醚(助溶剂)10%(相对于树脂质量),醇超量6%。用自制树脂配制的面漆具有以下突出性能:表干时间20 min,实干时间6 h,60°光泽94,铅笔硬度H,耐水性超过360 h。 相似文献
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首先用新戊二醇、间苯二甲酸–5–磺酸钠合成磺酸盐聚酯中间体,然后将其和非离子亲水单体(N120)、季戊四醇、豆油酸、邻苯二甲酸酐进行聚酯化反应合成水性醇酸树脂。再将水性醇酸树脂用丙烯酸酯单体进行自由基接枝聚合得到非离子改性水性醇酸树脂–丙烯酸树脂杂化体。用傅里叶变换红外光谱(FT-IR)、热重分析(TGA)对其结构进行了表征;探究了非离子亲水单体的用量、醇酸树脂分子量、油度、酸值对杂化体成膜性能和贮存稳定性的影响。结果显示:非离子亲水单体占水性醇酸树脂4%~8%(质量分数)、醇酸树脂分子量为2 200~2 500,油度为50%、杂化体酸值为10 mg KOH/g时制得的杂化体涂膜耐水性、干性、光泽及贮存稳定性最好。 相似文献
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水性醇酸树脂的合成及性能研究 总被引:12,自引:0,他引:12
通过脂肪酸法,选用豆油脂肪酸、偏苯三甲酸酐和不同的多元醇、多元酸制备了一系列水性醇酸树脂,用苯甲酸、顺丁烯二酸酐和油酸对其改性进行了研究。通过对合成产品性能如黏度、粒径、硬度、附着力、耐水性、耐汽油性等的研究,确定了综合性能较好的水性醇酸树脂。 相似文献
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环氧丙烯酸酯改性光固化水性聚氨酯的合成及性能研究 总被引:3,自引:1,他引:2
采用环氧丙烯酸酯(PPG-EA)、甲苯-2,4-二异氰酸酯(TDI)、聚丙二醇(PPG)、二羟甲基丙酸(DM-PA)和丙烯酸羟乙酯(HEA)等制备了环氧丙烯酸酯改性光固化水性聚氨酯乳液(WPU);研究了改性环氧丙烯酸酯用量、DMPA用量、n(—NCO)∶n(—OH)对乳液及涂膜性能的影响。结果表明:通过环氧丙烯酸酯改性的水性聚氨酯涂膜具有硬度高、耐水性和力学性能好的特点,并且克服了环氧树脂直接用于水性聚氨酯改性制备的乳液贮存稳定性差的不足。当改性环氧丙烯酸酯用量为6%-10%、DMPA用量为5.5%-7.5%、n(—NCO)∶n(—OH)为1.3-1.4时,UV固化水性聚氨酯乳液的综合性能较好。 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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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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Organo clay modified alkyd resins were prepared and these modified alkyd resins were cured with different ratios of melamine formaldehyde and urea formaldehyde resins in this work. Alkyds formulated to have oil content 40% were prepared with phthalic anhydride (PA), glycerine (G), coconut oil fatty acid (COFA), dipropylene glycol (DPG) and organo clay. “K alkyd constant system” was used for the formulation calculations of the alkyd resins. Alkyd resins were blended with 40% of a commercial melamine formaldehyde. The films of the alkyd–amino resins were prepared from 60% solid content xylene solutions using 50 μm applicators. After the films were cured at 140 °C for 2 h in an oven, properties of the films were determined. The film properties of the alkyd–amino resins such as drying degree, hardness, adhesion strength, abrasion resistance, water, acid, alkaline, solvent resistance, and resistance to environmental conditions were investigated. The addition of the urea formaldehyde resin and organo clay has positive effect on the physical and chemical resistance of the alkyd–amino resins. 相似文献
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以甘油、亚麻油酸、三羟甲基丙烷、邻苯二甲酸酐,间苯二甲酸及偏苯三酸酐等为原料合成了水性醇酸树脂,通过涂膜性能测试研究了反应温度、反应时间及偏苯三酸酐用量对水性醇酸树脂性能的影响。对比研究了氮丙啶型、硅氧烷型及多碳二亚胺型3种室温固化交联剂对水性醇酸树脂涂膜性能的影响。结果表明:水性化阶段偏苯三酸酐用量为10%,反应时间为1.5 h,反应温度为170 ℃时树脂性能较优。耐水性研究表明:加入硅氧烷型交联剂A后涂膜的耐水性最优,吸水率最低,当用量为6%时,清漆涂膜的硬度、光泽、附着力、耐水性、耐溶剂性均达到预期效果。加入辛酸亚锡后,涂膜在低温高湿环境下,干燥性及耐水性均得到明显改善。 相似文献