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Production method of flame-retardant unsaturated polyester

A technology of unsaturated polyester, applied in the field of preparation of flame retardant unsaturated polyester

Inactive Publication Date: 2020-11-24
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (6) Does not react adversely with other ingredients in unsaturated polyester, showing chemical inertness

Method used

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  • Production method of flame-retardant unsaturated polyester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add maleic anhydride, phthalic acid, and ethylene glycol into a 250ml three-necked flask according to the ratio of 33:48:46, turn on the temperature-regulating heating mantle and start to heat slowly, and at the same time, pass cooling water into the straight condenser tube, Raise the temperature to 80°C within 15 minutes, stir thoroughly, then raise the temperature to 160°C in 45 minutes, then raise the temperature to 190-200°C within one hour, and maintain the reaction at this temperature for 10 minutes (during this period, use a separate The amount of water produced by the water tank), then stop heating and naturally cool to 100-110°C, then add 40g of styrene and start stirring, keep the temperature at 100-110°C for one hour, stop heating, naturally cool to 50°C, and then pour out the product. Yield 96%.

Embodiment 2

[0021] Take out 100g of unsaturated polyester, pour it into a beaker together with 0.5% benzoyl peroxide, heat and stir with a magnetic stirrer for a period of time, then add 0.1% accelerator tin dichloride, continue to stir, 2min, quickly Pour the viscous liquid into the mold and take it out after it solidifies. Its limiting oxygen index was tested to be 35.

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Abstract

The invention relates to a production method of a flame-retardant unsaturated polyester. The production process comprises the following steps: mixing maleic anhydride, phthalic anhydride and ethyleneglycol according to a ratio ranging from (30-40):(40-60):(40-50); and adding tetrabromophthalic anhydride, which accounts for 1%-10% of the obtained mixture, into the mixture, elevating the temperature to 80 DEG C in 15 minutes, then elevating the temperature to 160 DEG C in 45 minutes, then elevating the temperature to 190-200 DEG C in one hour, maintaining a reaction for 10-30 minutes at 190-200DEG C, then conducting natural cooling to reduce the temperature to 100-110 DEG C, adding styrene which accounts for 20%-30%, conducting stirring for one hour, and then conducting natural cooling toreduce the temperature to 50 DEG C. A product is the flame-retardant unsaturated polyester.

Description

technical field [0001] The invention relates to the technical field of chemical synthesis, in particular to the preparation technology for flame-retardant unsaturated polyester. Background technique [0002] Unsaturated polyester (UPR) is by far the most used material in thermosetting resins. Its development and application are becoming more and more extensive, and it is required to have high flame retardancy in many fields. When selecting a flame retardant for unsaturated polyester, the main consideration is the processing temperature of the flame-retardant unsaturated polyester. The thermal stability required by the final product, the efficiency and price of the flame retardant used, and the mechanical and electrical properties of the flame-retardant unsaturated polyester. The ideal flame retardant should have the following characteristics in the use of unsaturated polyester [9] : [0003] (1) It can give unsaturated polyester flame retardancy and self-extinguishing pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/682C08G63/52C08L67/06
CPCC08G63/52C08G63/6828C08L67/06
Inventor 曹晨刚潘峥吉庆隆
Owner TIANJIN UNIV OF SCI & TECH
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