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Study on halogen-free flame retardant unsaturated polyester impregnating resin
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Zhan ZHOU1, Jian WANG1, Guisheng GONG2, Xue LI3, Guixia SONG4, Jiejun LIU4, Yunong LÜ1
Insulating Materials | 2023, 56(11) : 23 - 27
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Insulating Materials | 2023, 56(11): 23-27
• Material Research •
Study on halogen-free flame retardant unsaturated polyester impregnating resin
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Zhan ZHOU1, Jian WANG1, Guisheng GONG2, Xue LI3, Guixia SONG4, Jiejun LIU4, Yunong LÜ1
Affiliations
  • 1Hunan Electrical College of Technology, Xiangtan 411101, China
  • 2Guilin Electrical Equipment Scientific Research Institute Co., Ltd., Guilin 541004, China
  • 3Institute for Advanced Materials and Technology University of Science and Technology Beijing, Beijing 100083, China
  • 4Xiangtan Electrical Manufacturing Group, Xiangtan 411101, China
Published: 2023-11-20 doi: 10.16790/j.cnki.1009-9239.im.2023.11.004
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A halogen-free flame retardant unsaturated polyester insulating impregnating resin was prepared by introducing DOPO into unsaturated polyester. The effect of adding flame retardant on the properties of the resin were analyzed by infrared spectroscopy, thermogravimetric analysis and flame retardancy experiment. The results show that the addition conversion rate of DOPO can be improved by using methyl tetrahydrophthalic anhydride (MTHPA) as the carrier to react with DOPO first and then with maleic anhydride (MA). The prepared resin is uniform, transparent after curing, and has good flame retardance, which can reach UL94 V0 level. With the increase of phosphorus content, the thermal stability of resin decreases, and the optimal phosphorus content is about 2.7%. When the molar ratio of unsaturated acid to saturated acid is 1∶1 to 1.5∶1 and using the compound initiation polymerization system, the resin has good reactivity and storage stability.

phosphorus flame retardant  /  DOPO  /  unsaturated polyester  /  impregnating resin
Zhan ZHOU, Jian WANG, Guisheng GONG, Xue LI, Guixia SONG, Jiejun LIU, Yunong LÜ. Study on halogen-free flame retardant unsaturated polyester impregnating resin[J]. Insulating Materials, 2023 , 56 (11) : 23 -27 . DOI: 10.16790/j.cnki.1009-9239.im.2023.11.004
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doi: 10.16790/j.cnki.1009-9239.im.2023.11.004
  • Receive Date：2022-08-21
  • Online Date：2025-11-24
  • Published：2023-11-20
Article Data
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History
  • Received：2022-08-21
  • Revised：2023-02-24
Funding
Affiliations
    1Hunan Electrical College of Technology, Xiangtan 411101, China
    2Guilin Electrical Equipment Scientific Research Institute Co., Ltd., Guilin 541004, China
    3Institute for Advanced Materials and Technology University of Science and Technology Beijing, Beijing 100083, China
    4Xiangtan Electrical Manufacturing Group, Xiangtan 411101, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2023.11.004
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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