共查询到20条相似文献,搜索用时 140 毫秒
1.
蓖麻油酸改性的环氧-聚氨酯阴极电泳涂料的研制 总被引:1,自引:0,他引:1
以脱水蓖麻油酸酯化改性的环氧树脂为主链,聚氨酯预聚物为交联剂,选择适当的合成工艺和助剂,制备出漆液稳定、漆膜性能好、固化温度较低的蓖麻油酸改性的环氧-聚氨酯阴极电泳涂料.考察了酯化程度、胺开环率、酯化温度及工艺顺序等对树脂反应的影响. 相似文献
2.
3.
以脱水蓖麻油酸酯化改性的环氧树脂为主链,聚氨酯预聚物为交联剂,选择适当的合成工艺和助剂,制备出漆液稳定、漆膜性能好、固化温度较低的蓖麻油酸改性的环氧一聚氨酯阴极电泳涂料。考察了酯化程度、胺开环率、酯化温度及工艺顺序等对树脂反应的影响。 相似文献
4.
5.
6.
7.
用蓖麻油制备了蓖麻油衍生物,将蓖麻油衍生物用于合成改性水性聚氨酯.与标准品对比后的结果表明,蓖麻油衍生物能提高水性聚氨酯涂膜的交联密度、模量和拉伸强度,改善涂膜的耐水性和耐溶剂性能.用合成的改性水性聚氨酯树脂制备的涂膜外观好,具有良好的干燥性,能代替溶剂型单组分水性聚氨酯涂料. 相似文献
8.
9.
10.
研究了改性蓖麻油制备UV光固化涂料。由蓖麻油、环氧丙烯酸树脂UVR6100、光引发剂UVI6990制得的涂料具有优良的光泽、良好的柔韧性、良好的附着力与硬度,且当改性蓖麻油含量为40%时,漆膜性能最为优良。 相似文献
11.
Sonalee Das Priyanka Pandey Smita Mohanty Sanjay Kumar Nayak 《Polymer-Plastics Technology and Engineering》2017,56(14):1556-1585
Castor oil has gained momentous attention as a valuable bio-based monomer and a potential alternative to the current petrobased polyol for synthesizing polyurethane due to the presence of inherent hydroxyl group. In spite of its huge potentiality very little has been reviewed regarding the development of polyurethane from castor oil. This review thus highlights the recent trends and development in the field of polyurethane and its nanocomposite based on castor oil including its biodegradability and weatherability studies. Further, this review also provides an insight regarding the utilization of castor oil based polyurethane and its nanocomposite for coating application. 相似文献
12.
水性聚氨酯的蓖麻油和环氧改性及其富锌涂层耐蚀性能研究 总被引:1,自引:0,他引:1
以蓖麻油和环氧树脂为改性剂,对水性聚氨酯进行了改性,乳液红外分析证实了改性剂的有效接枝.改性后的聚氨酯其耐水性得到明显提高,吸水率降至3%以下.通过扫描电镜(SEM)、腐蚀电位和电化学阻抗谱(EIS)等方法对改性聚氨酯的富锌涂层进行了表征.结果表明,改性水性聚氨酯言锌涂料具有良好的耐蚀性;随着锌粉含量的增加,涂层耐蚀性提高. 相似文献
13.
蓖麻油改性的水性聚氨酯涂料的制备及其防蚀性能 总被引:2,自引:0,他引:2
以可再生的蓖麻油和环氧树脂改性水性聚氨酯,研究了涂膜的耐水性能等,改性后的水性聚氨酯吸水率下降仅为3%,耐水性好。对该树脂所制成的富锌防腐涂料进行了腐蚀电位和电化学阻抗谱(EIS)的测试分析,考察了富锌涂层在3%NaCl溶液中的电化学行为,结果表明耐水性的提高导致蓖麻油改性的水性聚氨酯富锌涂料耐蚀性的改进。 相似文献
14.
15.
以聚氧化丙烯二醇(PPG)和异佛尔酮二异氰酸酯(IPDI)为原料,蓖麻油(CO)和环氧树脂(E-44)为交联剂,采用预聚体分散法合成了一系列用于皮革涂饰的环氧树脂蓖麻油双重改性水性聚氨酯(ECOWPU)。采用FTIR、TEM、DSC、TGA对聚合物结构及膜的性能进行了分析。FTIR表明聚合物中引入了蓖麻油和环氧树脂,羟基和环氧基均参与反应。通过TEM可观察乳液颗粒呈球形,粒径较为均匀。DSC表明,改性后胶膜的微相分离程度增大。TGA表明,环氧树脂和蓖麻油的加入提高了聚氨酯的热稳定性。蓖麻油、E-44含量的增加,均使胶膜拉伸强度逐渐增大,断裂伸长率、吸水率降低。当蓖麻油添加量为4.9%,E-44添加量为7%时,胶膜的综合性能最佳。 相似文献
16.
Manuel F. Valero Jorge E. Pulido Álvaro Ramírez Zhengdong Cheng 《Journal of the American Oil Chemists' Society》2009,86(4):383-392
Castor oil was transesterified with pentaerythritol thereby introducing reactive hydroxyl groups. The method of matrix-assisted
laser desorption/ionization time-of-flight mass spectroscopy was used to determine the components of the castor oil pentaerythritol
alcoholysis products. Simultaneous interpenetrating polymer networks of pentaerythritol modified castor oil and diphenyl-methane
4-4′ diisocyanate polyurethane (P1-CO-PU) and polystyrene (PS) were synthesized using benzoyl peroxide as the initiator and
divinyl benzene as the crosslinker. The effect of PU/PS composition on the morphology, miscibility and physical properties
of the resulting IPNs was investigated by scanning electron microscopy, dynamic mechanical thermal analysis, measurements
of mechanical properties and resistance to chemical reagents. The patterns of the extent of the phase separation and the characteristics
of the interpenetration reached as a function of the components were deduced. 相似文献
17.
Andressa Cecília Milanese Maria Odila Hilário Cioffi Herman Jacobus Cornelis Voorwald Carlos Yujiro Shigue 《应用聚合物科学杂志》2011,122(5):3168-3171
This research presents the kinetic studies on the cure reactions of a new material, castor oil‐based polyurethane resin. Thermal analysis by isothermal differential scanning calorimetry was used, as a variety of factors affect its cure, including formulation and polymerization process. The kinetic reaction of this catalyzed system is described by nth order equation. Castor oil, a vegetable triglyceride, was reacted with methylene diphenyl 4,4′‐diisocyanate to produce an elastomeric matrix. The objective of this research is thermal characterization of new polyurethane that is less aggressive to humans and environment; therefore, castor oil used on the synthesis is derived from a natural and renewable resource. The activation energy measured for the castor oil‐based polyurethane resin studied in this work was about 56 kJ/mol. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011 相似文献
18.
19.
蓖麻油基下游产物及蓖麻油增塑剂的研究及其应用进展 总被引:1,自引:0,他引:1
随着全球化石资源消耗量的不断剧增, 能源危机问题引起了广泛的关注。在植物资源能源化的利用中, 以蓖麻油为原料开发高附加值下游产品已成为研究热点。本文介绍了国内外蓖麻油基下游产品的制备方法、产品性能及应用领域等方面。回顾了脱水蓖麻油、酯交换蓖麻油、环氧化蓖麻油、蓖麻油基聚氨酯等下游产物的制备与应用性能研究。简述了蓖麻油基增塑剂的种类及应用领域, 具体分析了环氧乙酰蓖麻油酸甲酯的制备方法及产品特性。提出了在我国蓖麻油基增塑剂的生产过程中反应温度、催化剂用量等因素影响环氧基团稳定性的问题, 指出目前我国催化合成蓖麻油基增塑剂的趋势和发展方向。 相似文献
20.
水性聚氨酯涂膜耐水性影响因素研究 总被引:2,自引:0,他引:2
以聚酯多元醇、甲苯二异氰酸酯为主要原料合成了水性聚氨酯乳液。研究了NCO/OH值、亲水扩链剂DMPA及交联剂TMP的用量、硬段软段质量比对乳液涂膜耐水性的影响,获得了较优的实验配比;研究了环氧树脂、蓖麻油、有机硅对水性聚氨酯的改性,实验表明,改性后的水性聚氨酯涂膜的耐水性能得到较大的提高。 相似文献