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A novel photocurable modified epoxy resin for high heat resistance coatings
Colloid and Polymer Science ( IF 2.4 ) Pub Date : 2020-07-20 , DOI: 10.1007/s00396-020-04708-2
Bangchao Yin , Junhua Zhang

In this paper, in order to further improve the heat resistance of UV-curing epoxy cresol novolac (EOCN), 2,2-bis(hydroxymethyl)propionic acid (DMPA) was firstly introduced to open epoxy groups in EOCN and then the hydroxyl groups reacted with acryloyl chloride to make sure the resin has sufficient UV-curing double bonds. Compared with the system that uses acrylic acid to open epoxy group and the secondary hydroxyl group reacting with unsaturated anhydride, up to 1.5 times double bonds were potentially introduced. The structure of the resins was characterized by FT-IR and 1H-NMR. Influences of double bond content on thermal behavior, photopolymerization kinetic behavior, and basic properties of the cured films were investigated. Thermal performance analysis demonstrated that the glass transition and the initial decomposition of the cured films were increased with the rising proportion of acryloyl group. Moreover, doping of abundant acryloyl chloride caused a significant increase of unsaturated double bond conversion, though the initial photopolymerization rates declined. Cured films with less acryloyl chloride modified showed better adhesive. For solvent-resistant test, with the increase of the acryloyl group, the cured film displayed good resistance to strong acids and alkalis. These attractive features give this process potential applications in soldering ink and protective coatings.

中文翻译:

一种用于高耐热涂料的新型光固化改性环氧树脂

本文为了进一步提高紫外光固化环氧甲酚酚醛清漆(EOCN)的耐热性,首先引入2,2-双(羟甲基)丙酸(DMPA)使EOCN中的环氧基开环,然后将羟基与丙烯酰氯反应以确保树脂具有足够的紫外线固化双键。与使用丙烯酸打开环氧基和仲羟基与不饱和酸酐反应的体系相比,潜在地引入了多达1.5倍的双键。树脂的结构通过FT-IR和1H-NMR表征。研究了双键含量对固化膜的热行为、光聚合动力学行为和基本性能的影响。热性能分析表明,随着丙烯酰基比例的增加,固化膜的玻璃化转变和初始分解增加。此外,尽管初始光聚合速率下降,但大量丙烯酰氯的掺杂导致不饱和双键转化率显着增加。丙烯酰氯改性较少的固化膜显示出更好的粘合性。耐溶剂试验中,随着丙烯酰基的增加,固化膜对强酸强碱表现出良好的耐受性。这些吸引人的特性使该工艺在焊接油墨和保护涂层方面具有潜在的应用。尽管初始光聚合速率下降。丙烯酰氯改性较少的固化膜显示出更好的粘合性。耐溶剂试验中,随着丙烯酰基的增加,固化膜对强酸强碱表现出良好的耐受性。这些吸引人的特性使该工艺在焊接油墨和保护涂层方面具有潜在的应用。尽管初始光聚合速率下降。丙烯酰氯改性较少的固化膜显示出更好的粘合性。耐溶剂试验中,随着丙烯酰基的增加,固化膜对强酸强碱表现出良好的耐受性。这些吸引人的特性使该工艺在焊接油墨和保护涂层方面具有潜在的应用。
更新日期:2020-07-20
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