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用本体法在C5石油树脂上接枝单烯烃苯乙烯(St),考察了不同聚合条件对产物的影响。随着St含量的增加,C5石油树脂的软化温度先降后升,在w(St)为37.5%,引发剂质量分数为1.0%,反应温度为200℃,反应时间为2.0 h时,软化温度达到最小值71℃。黏度测试表明,St改性C5石油树脂具有较好的流动性。铁钴比色分析表明,随着引发剂用量的增加,St改性C5石油树脂的色度增大,在引发剂质量分数为1.0%时,该石油树脂的色度为2#。 相似文献
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以从碳五(C_(5))馏分中分离出的主要组分间戊二烯、异戊二烯和异戊烯为原料,烷烃和不活泼烯烃为溶剂,无水三氯化铝为催化剂,合成C_(5)石油树脂。研究3种组分用量对C_(5)石油树脂软化点和色度的影响,获得物理性质优异的C_(5)石油树脂的适宜原料用量:间戊二烯24%~32%,异戊二烯≤10%,异戊烯6%~12%。 相似文献
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在92℃下,以过氧化二苯甲酰(BPO)为引发剂、丙烯酸(AA)为单体对C5石油树脂进行接枝共聚改性研究。由红外光谱、特性黏数和GPC数据可以得出:丙烯酸接枝到C5石油树脂的基体上。经丙烯酸接枝共聚改性后,C5石油树脂的分子量大幅度提高,分子量分布明显变窄,特性黏数也增加,丙烯酸在C5石油树脂上的接枝率较高。通过设计正交试验,探讨了引发剂的量、单体的量和反应时间3个因素对接枝率的影响。丙烯酸用量(C5石油树脂为100份基准)小于2份时,接枝率随着丙烯酸用量的增加而增加;大于2份时,接枝率降低。产物的接枝率随BPO用量的增加而增大。反应时间小于4 h时,接枝率随着反应时间的增加而增加,大于4 h时,接枝率稍有降低。当丙烯酸用量为2份,过氧化二苯甲酰用量为0.3份,反应时间为4 h时,产物的接枝率最高。 相似文献
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以56#半精炼石蜡为粘度调节剂,研究制备低熔融粘度的C-5石油树脂水基乳液,系统考察了非离子型复合乳化剂的HLB值和用量对石油树脂乳液稳定性、乳液粒径分布、乳液粘度和乳液表面张力的影响。研究结果表明,添加30%的石蜡可以明显降低石油树脂的熔融粘度,使物料在较低温度下实现均匀混合;复合乳化剂的最佳HLB值为10.75;最佳用量为16%。通过正交实验确定了优选乳化工艺条件为:乳化温度98℃、乳化时间20min、剪切速率5000rpm、乳化水占水相的比例为1/3,该条件下可制得固含量为40%,稳定性好、粒径小、粘度低的O/W型C-5石油树脂乳液。 相似文献
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介绍了乙烯基酯树脂(丙烯酸类改性环氧树脂)的耐化学品性、耐热性的原理。结合国外应用实例说明乙烯基酯树脂制成的涂料,可以解决石油储罐的现有问题,提高储罐耐腐蚀水平,将会成为石油储罐防腐蚀的发展方向。 相似文献
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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
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环氧聚氨酯耐油涂料的研制 总被引:6,自引:0,他引:6
通过选择适当的聚酯树脂和环氧树脂,配以适当的异氰酸固化剂,研制了一种用于油箱的环氧聚氨酯耐油涂料。检测结果表明,该涂料具有良好的低温干燥性能、耐腐蚀性能,优异的耐油性能特别是耐高温油性能。该涂料将在各种工程设备的油箱中具有广阔的应用前景。 相似文献
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采用不同改性的短油度醇酸树脂作甲组分,异氰酸酯预聚物作乙组分,配制双组分聚氨酯涂料,探讨甲组分对双组分聚氨酯涂料性能的影响。结果表明,椰子油改性短油度醇酸树脂,颜色水白、耐黄变性能和丰满度好,可以作为高档的亮光清面漆、耐黄变的面漆用树脂;蓖麻油改性短油度醇酸树脂,颜色较深、丰满度较好、干燥速度慢及柔韧性好,可以作为普通的亮光面漆用树脂;豆油改性短油度醇酸树脂,干燥速度较快,应用于底漆和哑光面漆;合成脂肪酸改性短油度醇酸树脂,颜色水白、流平好、干燥速度慢、丰满度高及硬度高,可以作为高档的亮光面漆用树脂。 相似文献
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A. E. Rheineck 《Journal of the American Oil Chemists' Society》1959,36(11):574-582
Conclusions It seems quite apparent that the use of drying oils in classical varnishes is giving way to the use of oils in similarly functioning
coatings or drying oil-free coatings.
The chemistry of drying oils in the varnish-cooking process is not too clearly established but appears to be one of ester
interchange between oil and resin. More research in this area is indicated. However if future research is to be undertaken,
it must be justified. In view of the declining varnish market, this is doubtful.
Lack of data makes it impossible accurately to correlate oil and resin functionality into a usable mathematical relationship. 相似文献
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单组分聚氨酯防水涂料性能分析 总被引:1,自引:0,他引:1
防水涂料类型有许多种,其中聚氨酯防水涂料由于具有防水性能好、耐腐蚀性能高、硬度大、弹性高等优点,在建筑防水工程中得到了广泛的应用。聚氨酯防水涂料有双组分和单组分之分,本文论述了双组分聚氨酯防水涂料存在的不足及单组分聚氨酯防水涂料的优点,指出了影响单组分聚氨酯防水涂料性能的诸多因素。 相似文献
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Coatings prepared from polyesteramide resin synthesized from linseed oil, a renewable resource, have been found to show improved physicomechanical and anticorrosive characteristics. These properties are further improved when aluminum is incorporated in the polyesteramide resin. The coatings of this resin are generally obtained by baking at elevated temperatures. With a view toward the use of linseed oil, as a precursor for the synthesis of polyesteramide resins and to cure their coatings at ambient temperature, toluylene diisocyanate (TDI) was incorporated into polyesteramide and alumina‐filled polyesteramide in varying proportions to obtain urethane‐modified resins. The latter resins were found to cure at room temperature. The broad structural features of the urethane‐modified polyesteramide and alumina‐filled polyesteramide were confirmed by FTIR and 1H–NMR spectroscopies. Scratch hardness; impact resistance; bending resistance; specular gloss; and resistance to acid, alkali, and organic solvents of the coatings of these resins were determined by standard methods. Physicomechanical and anticorrosive properties, specular gloss, and thermal stability of the urethane‐modified alumina‐filled polyesteramide coatings were found to be at higher levels among these resins. It was found that TDI could be incorporated in polyesteramide up to only 6 wt %, such that above this loading its properties started to deteriorate, whereas alumina‐filled polyesteramide could take up to 10 wt % TDI. Explanation is provided for the increase in scratch hardness and impact resistance above 6 and 10 wt % addition of TDI in polyesteramide and alumina‐filled polyesteramide, respectively, as well as for the decrease in flexibility and resistance to solvents, acid, and alkali of coatings of these resins above these limits of TDI addition. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 1855–1865, 2001 相似文献