A method for synthesizing bio-based polycarbonate based on isoidide and polycarbonate

A technology based on polycarbonate and isoidide, which is applied in the field of polycarbonate synthesis, can solve the difficulties of synthesizing high molecular weight polycarbonate, the difficulty of hydroxyl reactivity and effective chain growth, and the limitation of bisphenol A polycarbonate, etc. problems, to achieve the effect of ensuring the appearance and mechanical properties of the product, low biological toxicity, and increasing the application field

Active Publication Date: 2022-05-10
NINGBO ZHETIE DAPHOON CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, bisphenol A has certain biological toxicity, and bisphenol A polycarbonate is greatly limited in the application fields involving food containers and children's toys.
Isosorbide is limited by the lack of hydroxyl reactivity and is difficult to carry out effective chain growth, and it is difficult to synthesize high molecular weight polycarbonate

Method used

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  • A method for synthesizing bio-based polycarbonate based on isoidide and polycarbonate
  • A method for synthesizing bio-based polycarbonate based on isoidide and polycarbonate
  • A method for synthesizing bio-based polycarbonate based on isoidide and polycarbonate

Examples

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Effect test

Embodiment 1

[0050] A method for synthesizing bio-based polycarbonate based on isoidide, comprising the following steps:

[0051] ①. Raw material preparation: Accurately weigh 442.5g of isoidide and 687.5g of diphenyl carbonate according to the molar ratio of isoidide and diphenyl carbonate as 1:1.06; weigh titanium according to 0.14mol% of isoidide Catalyst Ti(OCH(CH 3 ) 2 ) 4 1.21g;

[0052] ②, Reactor treatment: Use nitrogen to replace the air in the reactor three times, and use a vacuum pump to extract the gas in the reactor to ensure that the pressure of the reactor during the reaction is less than 5kPa;

[0053] ③. Mixing reaction: Put the isoidide, diphenyl carbonate and titanium-based catalyst prepared in step ① into a 1L reactor for mixing, and heat up to 228-240°C while stirring. The heating time is 4 hours, and keep warm at 230°C React for 5-6.5 hours, and obtain bio-based polycarbonate after cooling.

[0054] The bio-based polycarbonate synthesized by the above method is ...

Embodiment 2

[0061] A method for synthesizing bio-based polycarbonate based on isoidide, comprising the following steps:

[0062] ①. Raw material preparation: Accurately weigh 442.5g of isoidide and 687.5g of diphenyl carbonate according to the molar ratio of isoidide and diphenyl carbonate as 1:1.06; weigh titanium according to 0.14mol% of isoidide Catalyst Ti(OCH(CH 3 ) 2 ) 4 1.21g;

[0063] ②, Reactor treatment: Use nitrogen to replace the air in the reactor for three times, and continue to provide protection. During the reaction process, use a vacuum pump to continuously extract the gas in the reactor, and control the pressure of the reactor to 0.3-0.6kPa;

[0064] ③. Mixing reaction: Put the isoidide, diphenyl carbonate and titanium-based catalyst prepared in step ① into a 1L reactor for mixing, and heat up to 228-240°C while stirring. The heating time is 4 hours, and keep warm at 230°C React for 5-6.5 hours, and obtain bio-based polycarbonate after cooling.

[0065] The bio-bas...

Embodiment 3

[0070] A method for synthesizing bio-based polycarbonate based on isoidide, comprising the following steps:

[0071] ①. Raw material preparation: Accurately weigh 442.5g of isoidide and 687.5g of diphenyl carbonate according to the molar ratio of isoidide and diphenyl carbonate as 1:1.06; weigh titanium according to 0.14mol% of isoidide Catalyst Ti(OCH(CH 3 ) 2 ) 4 1.21g, according to the mass percentage concentration of 3-10%, configure the hot phenol solution of the catalyst, and the preheating temperature is 40-60°C;

[0072]② Reactor treatment: Use nitrogen to replace the air in the reactor for three times, and continue to provide protection. During the reaction process, use a vacuum pump to continuously extract the gas in the reactor, and control the pressure of the reactor to 0.35kPa.

[0073] ③. Mixing reaction: Put the isoidide and diphenyl carbonate prepared in step ① into a 1L reactor for mixing, raise the temperature to ≥50°C, add the hot phenol solution of the ...

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Abstract

The application relates to the technical field of polycarbonate synthesis, more specifically, it relates to a method for synthesizing bio-based polycarbonate based on isoidide and polycarbonate, comprising the following steps: adding a set amount of isoidide , diphenyl carbonate and titanium-based catalysts are placed in a reactor and mixed, and the temperature is raised to 228-240°C while stirring, and then the reaction is kept for 5-6.5h in a vacuum environment with an air pressure <5kPa, and the reaction is terminated to obtain bio-based polycarbonate ester. In this method, molten isoidide and molten diphenyl carbonate are chain-growthed by transesterification under the action of a titanium-based catalyst, and high-molecular-weight bio-based polycarbonate can be synthesized efficiently, because isoidide is harmless to the environment , the biotoxicity of its synthetic bio-based polycarbonate is relatively low, which helps to increase its application field.

Description

technical field [0001] The application relates to the technical field of polycarbonate synthesis, more specifically, it relates to a method for synthesizing bio-based polycarbonate based on isoidide and polycarbonate. Background technique [0002] Polycarbonate, a thermoplastic engineering plastic with excellent comprehensive properties, is the only product with good transparency among the five major engineering plastics. The existing polycarbonate synthesis route is mainly based on bisphenol A and diphenyl carbonate as raw materials through transesterification. The product has a wide range of applications and has a high degree of market acceptance. There is also a route to synthesize bio-based polycarbonate using isosorbide and diphenyl carbonate as raw materials. Bio-based polycarbonate products have broad application prospects in the field of 5G communications due to their high light transmittance and high surface hardness. There are no application examples in China. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G64/30C08G64/02
CPCC08G64/305C08G64/0208
Inventor 邱琪浩顾亥楠王晨晔宋欢欢徐宁姿陆优英武慧荣
Owner NINGBO ZHETIE DAPHOON CHEM
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