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A kind of transparent polyester imide resin and preparation method thereof

A technology of polyester imide resin and polyester imide, which is applied in the field of transparent polyester imide resin and its preparation, can solve the problems of reduced transparency and lower glass transition temperature of polyimide, and achieves Effects of lower water absorption, lower electron affinity, and higher glass transition temperature

Active Publication Date: 2018-10-02
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, Chinese patent CN 102911359 discloses a transparent polyimide prepared by a diether dianhydride with low electron affinity, but due to the introduction of the soft segment ether bond in this monomer, the glass of the prepared polyimide The transformation temperature is lowered
[0005] In order to overcome this problem, many researchers tried to use trimellitic anhydride and diester dianhydrides prepared from various diphenols to synthesize corresponding polyester imides, as reported in the journal Macromol.Mater.Eng.2011,296,1002–1017 The comparison experiment between polyetherimide and polyesterimide shows that compared with polyetherimide, polyesterimide improves the glass transition temperature of the polymer, but the transparency performance is greatly reduced. Further improve

Method used

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  • A kind of transparent polyester imide resin and preparation method thereof
  • A kind of transparent polyester imide resin and preparation method thereof
  • A kind of transparent polyester imide resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In this embodiment, the transparent polyester-imide resin material has the following structural formula:

[0037]

[0038] The specific preparation method is: under the protection of nitrogen, add 1.7230g (4.0mmol) of 4,4'-bis(3-aminophenoxy)diphenylsulfone and 16ml of N,N-dimethylacetamide to 50ml of reaction In the bottle, stir at room temperature. After the 4,4'-bis(3-aminophenoxy)diphenyl sulfone is completely dissolved, add 1.8334g (4.0mmol) of bis(3,4-dimethyl Anhydride) phenyl ester, continue stirring at room temperature for 24 hours to obtain a viscous polyester amic acid solution, and then dilute the solution to a concentration of 10% by weight. Then, a mixed solution of 4 mL of acetic anhydride and 2 mL of pyridine was added, and stirring was continued at room temperature for 24 hours to obtain a polyesterimide solution. The reaction solution is dropped into ethanol to obtain fibrous polyester imide precipitates, and dried to obtain polyester imide powder....

Embodiment 2

[0048] In this embodiment, the transparent polyester-imide resin material has the following structural formula:

[0049]

[0050] The specific preparation method is: under the protection of nitrogen, mix 1.3450g (4.0mmol) of 2,2'-bis(trifluoromethyl)-4,4'-diaminodiphenyl ether and 16ml of N,N-dimethyl Add acetamide into a 50mL reaction bottle, stir at room temperature, and after 2,2'-bis(trifluoromethyl)-4,4'-diaminodiphenyl ether is completely dissolved, add 1.8333g (4.0mmol) of p-phenylene Dicarboxylic acid bis(3,4-dicarboxylic anhydride)phenyl ester was stirred at room temperature for 24 hours to obtain a viscous polyester amic acid solution, and then the solution was diluted to a concentration of 10% by weight.

[0051] Apply the diluted polyester amic acid solution evenly on a clean glass plate, the thickness of the solution coating film is 0.5mm, place the glass plate in a drying oven, and heat up according to the following procedure: 80°C, 1 hour ; 150°C, 1 hour; 26...

Embodiment 3

[0054] In this embodiment, the transparent polyester-imide resin material has the following structural formula:

[0055]

[0056] The specific preparation method is: under nitrogen protection, mix 2.2740 (4.0 mmol) of 4,4'-bis(2-trifluoromethyl-4-aminophenoxy)diphenyl sulfone and 16 ml of N,N-dimethyl Add acetamide into a 50mL reaction flask, stir at room temperature, and then add 1.8333g (4.0mmol) of p- Bis(3,4-dicarboxylic anhydride)phenyl phthalate was stirred at room temperature for 24 hours to obtain a viscous polyester amic acid solution, and then the solution was diluted to a concentration of 10% by weight. Then, a mixed solution of 4 mL of acetic anhydride and 2 mL of pyridine was added, and stirring was continued at room temperature for 24 hours to obtain a polyesterimide solution. The reaction solution is dropped into ethanol to obtain fibrous polyester imide precipitates, and dried to obtain polyester imide powder. The glass transition temperature of the polyme...

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Abstract

The invention discloses transparent polyesterimide resin and a preparing method conducted through condensation polymerization of a di(3,4-dimethylbenzene anhydride) phenyl terephthalate monomer and a binary primary amine monomer. In the design of dianhydride, the electron affinity of the dianhydride is reduced, formation of charge transfer complexes in polyesterimide molecules and among the molecules is inhibited, and therefore the transparent performance is improved. The glass transformation temperature of the polyesterimide resin is 200-350 DEG C, the light transmissivity at the position of 400 nm is 70%-90%, water absorption of a thin film is smaller than 0.5%, and the transparent polyesterimide resin has good application prospects in the fields of flexible substrate materials, flexible transparent conduction film substrate materials, liquid crystal display materials and the like of solar batteries.

Description

technical field [0001] The invention relates to the field of polyimide and its preparation, in particular to a transparent polyesterimide resin and its preparation method. Background technique [0002] Polyimide is the most important variety of aromatic heterocyclic polymers developed in the past half century, and it is also a type of polymer material with the highest service temperature. It has high mechanical strength, high temperature resistance, chemical stability, and creep resistance. With excellent comprehensive performance, it has been widely used in aviation, aerospace, electrical, mechanical, microelectronics, chemical industry and other fields. [0003] Recently, with the development of high-tech industries, the demand for high heat-resistant and high-transmittance polyimide in optical fields such as light guides, waveguides and liquid crystal displays is becoming more and more urgent, because polyimide with high temperature resistance and high light transmission ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/10
Inventor 周禹陈国飞方省众
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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