以85%的磷酸和双酚A型环氧树脂(E51)为原料,采用自乳化法制备水性环氧磷酸酯乳液。采用傅里叶红外光谱(FT-IR)对反应前后物质的结构进行了表征。研究了产物在不同条件下的黏度、硬度、涂膜附着力、耐水煮性等性能的变化,探讨了游离磷酸...以85%的磷酸和双酚A型环氧树脂(E51)为原料,采用自乳化法制备水性环氧磷酸酯乳液。采用傅里叶红外光谱(FT-IR)对反应前后物质的结构进行了表征。研究了产物在不同条件下的黏度、硬度、涂膜附着力、耐水煮性等性能的变化,探讨了游离磷酸、单磷酸酯和双磷酸酯等对产物性能的影响。结果表明:反应产物中引入大量的亲水基团,使产物具有良好的水可分散性;当磷酸羟基与环氧基的物质的量比为3∶2、产物黏度为2 326 m Pa·s时,制备的水性环氧磷酸酯乳液的综合性能最好;当单磷酸酯含量较高时,有利于提高产物涂层与金属基底的附着力和耐水煮性。展开更多
环氧树脂的磷酸化是制备水溶性环氧树酯的一种新的途径。研究了五氧化二磷磷酸化环氧树脂的工艺条件,讨论了温度、时间、投料比等因素对环氧树脂磷酸化过程的影响,利用红外光谱对合成的产物进行了结构表征,并对其水乳液的性能进行了测...环氧树脂的磷酸化是制备水溶性环氧树酯的一种新的途径。研究了五氧化二磷磷酸化环氧树脂的工艺条件,讨论了温度、时间、投料比等因素对环氧树脂磷酸化过程的影响,利用红外光谱对合成的产物进行了结构表征,并对其水乳液的性能进行了测试。实验结果表明,所制备的产物为环氧磷酸酯类化合物,且具有较好的表面活性,其临界胶束浓度(cmc)为0.3%(质量分数),当乳液质量分数增大到临界胶束浓度以上时,气-液表面张力缓慢增大到44.2 m N/m并保持稳定;乳液质量分数在30%以下时,具有良好的机械稳定性,属假塑性流体。展开更多
Hydroxyl-epoxy phosphate （HEP） as a reactive corrosion inhibitor was innovatively synthe- sized by the reaction of bisphenol A epoxy resin with phosphoric acid. HEP was mixed with hydroxyl acrylate resin, and crossl...Hydroxyl-epoxy phosphate （HEP） as a reactive corrosion inhibitor was innovatively synthe- sized by the reaction of bisphenol A epoxy resin with phosphoric acid. HEP was mixed with hydroxyl acrylate resin, and crosslinked with waterborne isocyanate curing agent, which was used to form waterborne HEP/acrylic polyurethane composite （HEP-APU） coatings on Q235 steel surfaces. Electrochemical impedance spectroscopy and polarization curves were applied to analyze the corrosion behavior of the HEP-APU coatings in 3.5wt% NaCl solutions. The results indicated that the HEP-APU coatings show a superior passivation property and efficient corrosion protection of Q235 steel. The waterborne acrylic polyurethane coating containing 0.5wt% HEP exhibited the best corrosion performance among all the coating specimens. The improved flash-rust resistance can be attributed to the introduction of the phosphate group which could form phosphate film on the steel substrate.展开更多
文摘以85%的磷酸和双酚A型环氧树脂(E51)为原料,采用自乳化法制备水性环氧磷酸酯乳液。采用傅里叶红外光谱(FT-IR)对反应前后物质的结构进行了表征。研究了产物在不同条件下的黏度、硬度、涂膜附着力、耐水煮性等性能的变化,探讨了游离磷酸、单磷酸酯和双磷酸酯等对产物性能的影响。结果表明:反应产物中引入大量的亲水基团,使产物具有良好的水可分散性;当磷酸羟基与环氧基的物质的量比为3∶2、产物黏度为2 326 m Pa·s时,制备的水性环氧磷酸酯乳液的综合性能最好;当单磷酸酯含量较高时,有利于提高产物涂层与金属基底的附着力和耐水煮性。
文摘环氧树脂的磷酸化是制备水溶性环氧树酯的一种新的途径。研究了五氧化二磷磷酸化环氧树脂的工艺条件,讨论了温度、时间、投料比等因素对环氧树脂磷酸化过程的影响,利用红外光谱对合成的产物进行了结构表征,并对其水乳液的性能进行了测试。实验结果表明,所制备的产物为环氧磷酸酯类化合物,且具有较好的表面活性,其临界胶束浓度(cmc)为0.3%(质量分数),当乳液质量分数增大到临界胶束浓度以上时,气-液表面张力缓慢增大到44.2 m N/m并保持稳定;乳液质量分数在30%以下时,具有良好的机械稳定性,属假塑性流体。
文摘Hydroxyl-epoxy phosphate （HEP） as a reactive corrosion inhibitor was innovatively synthe- sized by the reaction of bisphenol A epoxy resin with phosphoric acid. HEP was mixed with hydroxyl acrylate resin, and crosslinked with waterborne isocyanate curing agent, which was used to form waterborne HEP/acrylic polyurethane composite （HEP-APU） coatings on Q235 steel surfaces. Electrochemical impedance spectroscopy and polarization curves were applied to analyze the corrosion behavior of the HEP-APU coatings in 3.5wt% NaCl solutions. The results indicated that the HEP-APU coatings show a superior passivation property and efficient corrosion protection of Q235 steel. The waterborne acrylic polyurethane coating containing 0.5wt% HEP exhibited the best corrosion performance among all the coating specimens. The improved flash-rust resistance can be attributed to the introduction of the phosphate group which could form phosphate film on the steel substrate.
