Preparation method of ultraviolet-resistant and damp-heat aging-resistant copolyester

A technology of copolyester and heat and humidity resistance, which is applied in the field of polyester preparation, can solve problems such as complex preparation process, achieve the effect of reducing the content of terminal carboxyl groups, reducing the content of ester bonds, and improving the water vapor barrier performance

Active Publication Date: 2021-11-02
浙江凯普奇新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the film prepared by this method has the properties of UV resistance and hydrolysis resistance, the preparation process is too complicated

Method used

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  • Preparation method of ultraviolet-resistant and damp-heat aging-resistant copolyester
  • Preparation method of ultraviolet-resistant and damp-heat aging-resistant copolyester
  • Preparation method of ultraviolet-resistant and damp-heat aging-resistant copolyester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 1600g of terephthalic acid, 400g of 2,6-naphthalene dicarboxylic acid, 1200g of ethylene glycol, 0.6g of catalyst, and 1.05g of stabilizer into a 5L reaction kettle, replace the air in the polymerization kettle with inert gas, and then stir for 10min to dissolve the materials Mix evenly, control the pressure in the polymerization tank at 0.1-0.4MPa, the speed of the agitator at 50-120r / min, control the temperature in the polymerization tank at 220-250°C, calculate the esterification efficiency by the liquid output rate, when the conversion rate reaches 90- At 100%, the esterification reaction ends and the pressure is released.

[0027] Vacuumize the reactor, control the pressure of the reactor at 0.5-1kPa, control the temperature in the polymerization tank at 240-270°C, and react for 20-50 minutes; then control the pressure of the reactor at 50-300Pa, and control the temperature in the polymerization tank at 270-290°C. Reaction 90~180min.

[0028] Add 40 g of a mon...

Embodiment 2

[0030] Add 1500g of terephthalic acid, 500g of dimethyl 2,6-naphthalene dicarboxylate, 1000g of ethylene glycol, 1.5g of antimony acetate, and 0.75g of stabilizer into a 5L reaction kettle, replace the air in the polymerization kettle with an inert gas, and then Stir for 15 minutes to mix the materials evenly, control the pressure in the polymerization tank at 0.1-0.4 MPa, the speed of the agitator at 50-120r / min, control the temperature in the polymerization tank at 220-250°C, calculate the esterification efficiency by the liquid output rate, when the conversion When the rate reaches 90-100%, the esterification reaction ends and the pressure is released.

[0031] Vacuumize the reactor, control the pressure of the reactor at 0.5-1kPa, control the temperature in the polymerization tank at 240-270°C, and react for 20-50 minutes; then control the pressure of the reactor at 50-300Pa, and control the temperature in the polymerization tank at 270-290°C. Reaction 90~180min.

[0032]...

Embodiment 3

[0034] Add 1000g of terephthalic acid, 200g of isophthalic acid, 800g of 2,6-naphthalene dicarboxylic acid, 1500g of propylene glycol, 1.0g of catalyst, and 10.0g of stabilizer into a 5L reaction kettle, replace the air in the polymerization kettle with inert gas, and then Stir for 15 minutes to mix the materials evenly, control the pressure in the polymerization tank at 0.1-0.4 MPa, the speed of the agitator at 50-120r / min, control the temperature in the polymerization tank at 220-250°C, calculate the esterification efficiency by the liquid output rate, when the conversion When the rate reaches 90-100%, the esterification reaction ends and the pressure is released.

[0035] Vacuumize the reactor, control the pressure of the reactor at 0.5-1kPa, control the temperature in the polymerization tank at 240-270°C, and react for 20-50 minutes; then control the pressure of the reactor at 50-300Pa, and control the temperature in the polymerization tank at 270-290°C. Reaction 90~180min...

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Abstract

A preparation method of ultraviolet-resistant and damp-heat-aging-resistant copolyester is characterized in that the copolyester is prepared by controlling the charging ratio of polycyclic aromatic hydrocarbon derivative monomers to dibasic acid to dihydric alcohol to perform esterification and polycondensation and then performing end capping through monofunctional epoxy substances, and the end capping step is performed at the end of the polycondensation reaction. Compared with the prior art, the preparation method has the advantages of ultraviolet resistance, damp-heat aging resistance, water vapor barrier property and dimensional stability.

Description

technical field [0001] The invention relates to the preparation of polyester and belongs to the technical field of polymer materials. Background technique [0002] With the increasingly serious problems of global warming, shortage of fossil resources and environmental pollution, the development of green new energy and the pursuit of sustainable development have become a major trend in the world. Compared with geothermal energy, ocean energy, wind energy and nuclear power generation, solar power generation has the advantages of the most abundant resources, the most direct energy conversion, the cleanest and environmental protection, and zero emissions. [0003] The polyester synthesized by esterification reaction and polycondensation reaction of polybasic acid and polyol not only has low production cost, but also has good heat resistance, chemical resistance, mechanical properties and electrical insulation. So it is widely used in solar cell backplane. However, solar cells ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/189C08G63/86C08G63/91
CPCC08G63/183C08G63/189C08G63/916C08G63/866Y02E10/50Y02W90/10
Inventor 凌锋蒲新明郑兵蔡阳陈陵翔应婕杨利平
Owner 浙江凯普奇新材料科技有限公司
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