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Polyimide resin

A polyimide resin and alicyclic hydrocarbon technology, which is applied in the field of thermoplastic polyimide resin, can solve the problems of polyimide resin rigidity reduction, glass transition temperature reduction, melting point reduction, etc., and achieve excellent reflow Welding resistance, less decrease in strength, well-balanced effect

Active Publication Date: 2017-03-22
MITSUBISHI GAS CHEM CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the rigidity of the polyimide resin decreases, so the melting point also decreases
However, for this method, there is concern that the glass transition temperature decreases with decreasing melting point, especially the decrease in strength when high temperature occurs
Furthermore, there is also a problem that it is difficult to synthesize a polyimide resin using a raw material diamine mainly composed of aliphatic diamine.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0271] [Example 1] Manufacture of polyimide resin 1

[0272] 600 g of 2-(2-methoxyethoxy)ethanol (manufactured by Nippon Emulsifier Co., Ltd.) was introduced into a 2L detachable flask equipped with a Dean-Stark apparatus, a Liebig condenser, a thermocouple, and 4 paddle blades and 218.58 g (1.00 mol) of pyromellitic dianhydride (manufactured by Mitsubishi Gas Chemical Co., Ltd.), and after flowing nitrogen gas, it was stirred at 150 rpm to make a uniform suspension solution. On the other hand, using a 500 mL beaker, 49.42 g (0.347 mol) of 1,3-bis(aminomethyl)cyclohexane (manufactured by Mitsubishi Gas Chemical Co., Ltd.), 1,8-octamethylenediamine (Kanto Chemical Co., Ltd. Co., Ltd.) 93.16 g (0.645 mol) was dissolved in 250 g of 2-(2-methoxyethoxy)ethanol to prepare a mixed diamine solution. The mixed diamine solution was slowly added using a plunger pump. During the dropwise addition of the mixed diamine solution, nitrogen flow was used, and the rotational speed of the stir...

Embodiment 2

[0276] [Example 2] Manufacture of polyimide resin 2

[0277]500 g of 2-(2-methoxyethoxy)ethanol (manufactured by Nippon Emulsifier Co., Ltd.) was introduced into a 2L detachable flask equipped with a Dean-Stark apparatus, a Liebig condenser, a thermocouple, and 4 paddle blades After 109.06 g (0.500 mol) of pyromellitic dianhydride (manufactured by Mitsubishi Gas Chemical Co., Ltd.), and flowing nitrogen gas, it stirred at 150 rpm, and was made into the uniform suspension solution. On the other hand, 21.18 g (0.149 mol) of 1,3-bis(aminomethyl)cyclohexane (manufactured by Mitsubishi Gas Chemical Co., Ltd.), 1,8-octamethylenediamine (Kanto Chemical Co., Ltd. Co., Ltd.) 50.12 g (0.347 mol) was dissolved in 200 g of 2-(2-methoxyethoxy)ethanol to prepare a mixed diamine solution. The mixed diamine solution was slowly added using a plunger pump. During the dropwise addition of the mixed diamine solution, nitrogen flow was used, and the rotational speed of the stirring blade was set...

Embodiment 3

[0279] [Example 3] Manufacture of polyimide resin 3

[0280] 500 g of 2-(2-methoxyethoxy)ethanol (manufactured by Nippon Emulsifier Co., Ltd.) was introduced into a 2L detachable flask equipped with a Dean-Stark apparatus, a Liebig condenser, a thermocouple, and 4 paddle blades After 109.06 g (0.500 mol) of pyromellitic dianhydride (manufactured by Mitsubishi Gas Chemical Co., Ltd.), and flowing nitrogen gas, it stirred at 150 rpm, and was made into the uniform suspension solution. On the other hand, using a 500 mL beaker, 17.65 g (0.124 mol) of 1,3-bis(aminomethyl)cyclohexane (manufactured by Mitsubishi Gas Chemical Co., Ltd.), 1,8-octamethylenediamine (Kanto Chemical Co., Ltd. Co., Ltd.) 53.70 g (0.372 mol) was dissolved in 200 g of 2-(2-methoxyethoxy)ethanol to prepare a mixed diamine solution. The mixed diamine solution was slowly added using a plunger pump. During the dropwise addition of the mixed diamine solution, nitrogen flow was used, and the rotational speed of th...

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Abstract

Polyimide resin containing repeating structural units represented by formula (1) and repeating constituent units represented by formula (2), having a content ratio of repeating constituent units of formula (1) to total repeating constituent units of formula (1) and repeating constituent units of formula (2) of from 20 mol% to less than 40 mol%, and satisfying predetermined conditions. (R1 is a divalent group having 6-22 carbon atoms containing at least one alicyclic hydrocarbon structure. R2 is a divalent chain aliphatic group having 5-16 carbon atoms. X1 and X2 are each independently a tetravalent group having 6-22 carbon atoms containing at least one aromatic ring.)

Description

technical field [0001] This invention relates to thermoplastic polyimide resins. Background technique [0002] Polyimide resins are useful engineering plastics with high thermal stability, high strength, and high solvent resistance due to the rigidity of molecular chains, resonance stability, and strong chemical bonds, and are used in a wide range of fields. Moreover, since the polyimide resin which has crystallinity can further improve the heat resistance, strength, and chemical resistance, it is expected to be used as a metal substitute etc. However, although polyimide resin has high heat resistance, it does not show thermoplasticity, and there exists a problem that moldability is low. [0003] As a polyimide molding material, high heat-resistant resin Vespel (registered trademark) and the like are known (Patent Document 1), but its fluidity is extremely low even at high temperatures, making it difficult to mold and process, and it needs to be processed under high tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10
CPCC08G73/1042C08G73/1082C08J5/18C08J2379/08C08G73/1017C08G73/10C08J5/00
Inventor 佐藤勇希
Owner MITSUBISHI GAS CHEM CO INC
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