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Efficient intrinsic flame-retardant polycarbonate and preparation method thereof

An intrinsic flame retardant, polycarbonate technology, applied in the field of high-efficiency intrinsic flame retardant polycarbonate and its preparation, can solve the problems of large investment in phosgene method, small amount of sulfonate added, high risk, etc. Overcome uneven dispersion, improve flame retardant properties, easy to operate

Inactive Publication Date: 2021-06-04
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small amount of sulfonate added, it is difficult to mix well in polycarbonate
[0004] The phosgene method is a traditional polycarbonate production technology, but the phosgene method has a large investment, and the emission of methylene chloride during the production process is suspected to be carcinogenic. At the same time, COCl 2 As a highly toxic product, it is extremely dangerous. Countries all over the world have strict regulations on COCl 2 There are very strict legal regulations and restrictions on the production and application of

Method used

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  • Efficient intrinsic flame-retardant polycarbonate and preparation method thereof
  • Efficient intrinsic flame-retardant polycarbonate and preparation method thereof
  • Efficient intrinsic flame-retardant polycarbonate and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Add 26.54g of bisphenol A and 0.9g of bisphenol S into a 250ml three-necked flask, then add a certain amount of NaOH aqueous solution, and stir to fully dissolve it. Then add 0.22g of triethylamine, 1.65g of siloxane and 0.18g of sodium bisulfite, stir rapidly and raise to 35°C to dissolve completely. Dissolve 13.024g of triphosgene in 160ml of dichloromethane, dropwise add it into a three-neck flask with a constant pressure dropping funnel, and continue to react for 1 hour after the dropwise addition is completed. Let the contents of the three-necked flask stand for 1 hour, pour out the supernatant, wash the lower turbid solution with deionized water until it is neutral, then use 200ml of absolute ethanol to precipitate the product, filter it, and dry it in an oven at 100°C for 12 Hours, the intrinsic flame retardant polycarbonate was obtained.

Embodiment 2

[0033] Add 25.72g of bisphenol A and 1.8g of bisphenol S into a 250ml three-necked flask, then add a certain amount of NaOH aqueous solution, and stir to fully dissolve it. Then add 0.22g triethylamine, 1.65g siloxane and 0.18g sodium bisulfite, stir rapidly and raise to 35°C to dissolve completely. Dissolve 13.024g of triphosgene in 160ml of dichloromethane, dropwise add it into a three-neck flask with a constant pressure dropping funnel, and continue to react for 1 hour after the dropwise addition is completed. Let the contents of the three-necked flask stand for 1 hour, pour out the supernatant, wash the lower turbid solution with deionized water until it is neutral, then use 200ml of absolute ethanol to precipitate the product, filter it, and dry it in an oven at 100°C for 12 Hours, the intrinsic flame retardant polycarbonate was obtained.

Embodiment 3

[0035] Add 24.90 g of bisphenol A and 2.7 g of bisphenol S into a 250 ml three-necked flask, then add a certain amount of NaOH aqueous solution, and stir to fully dissolve it. Then add 0.22g triethylamine, 1.65g siloxane and 0.18g sodium bisulfite, stir rapidly and raise to 35°C to dissolve completely. Dissolve 13.024g of triphosgene in 160ml of dichloromethane, dropwise add it into a three-neck flask with a constant pressure dropping funnel, and continue to react for 1 hour after the dropwise addition is completed. Let the contents of the three-necked flask stand for 1 hour, pour out the supernatant, wash the lower turbid solution with deionized water until it is neutral, then use 200ml of absolute ethanol to precipitate the product, filter it, and dry it in an oven at 100°C for 12 Hours, the intrinsic flame retardant polycarbonate was obtained.

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Abstract

The invention relates to the field of functional polymer materials, in particular to efficient intrinsic flame-retardant polycarbonate and a preparation method thereof. The structural formula is shown as the specification, wherein a is equal to 10 to 2000, b is equal to 1 to 100, and c is equal to 1 to 100. The bisphenol A / bisphenol S / siloxane copolycarbonate is prepared by adopting a triphosgene polymerization method, wherein the arylsulfonate radicals in the bisphenol S structure have an efficient flame-retardant effect, and meanwhile, a silicon flame-retardant structure in the siloxane structure and the arylsulfonate radicals have a synergistic flame-retardant effect, so that the flame-retardant property of the polycarbonate is further improved.

Description

technical field [0001] The invention relates to the field of functional polymer materials, in particular to a high-efficiency intrinsic flame-retardant polycarbonate and a preparation method thereof. Background technique [0002] Polycarbonate is an engineering plastic with excellent comprehensive properties. It is colorless, odorless, and non-toxic. It has the characteristics of high strength, high toughness, strong heat resistance and cold resistance, excellent dielectric properties, and excellent color. And dimensional stability, second only to polyamide among the six major engineering plastics consumption. Polycarbonate products have penetrated into industries such as automobiles, construction, machinery, clothing, medicine, and electronic appliances, and are closely related to people's lives. However, the limiting oxygen index of polycarbonate is only 21% to 26%, the vertical combustion is UL94 V-2 level, and the flame retardancy is not good. [0003] At present, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/18C08G64/24C08G77/448
CPCC08G64/186C08G64/24C08G77/448
Inventor 蔡绪福张子俊袁丹丹
Owner SICHUAN UNIV
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