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Polyimide resin composition

A technology of polyimide resin and composition, applied in the field of polyimide resin composition, can solve the problems of low molding processability, low fluidity, no thermoplasticity, etc., and achieves good productivity, high crystallization temperature, excellent Effects of long-term heat resistance

Active Publication Date: 2021-09-28
MITSUBISHI GAS CHEM CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyimide resin has high heat resistance, but on the other hand, it does not exhibit thermoplasticity and has a problem of low moldability
[0003] As a polyimide molding material, high heat-resistant resin VESPEL (registered trademark) and the like are known (Patent Document 1). Even at high temperatures, the fluidity is extremely low, so molding processing is difficult. Since long-time molding is necessary, it is also disadvantageous in terms of cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0182] Next, although an Example is given and this invention is demonstrated in more detail, this invention is not limited to this. In addition, various measurement and evaluation in each manufacture example and an Example were performed as follows.

[0183]

[0184] The IR measurement of the polyimide resin was performed using "JIR-WINSPEC50" manufactured by JEOL Ltd.

[0185]

[0186] A polyimide resin obtained by dissolving 0.100 g of the polyimide resin in 20 mL of concentrated sulfuric acid (96%, manufactured by Kanto Chemical Co., Ltd.) after drying the polyimide resin at 190-200°C for 2 hours The solution was used as a measurement sample, and it measured at 30 degreeC using the Cannon-Finks viscometer. The logarithmic viscosity μ was obtained by the following formula.

[0187] μ=ln(ts / t 0 ) / C

[0188] t 0 : flow time of concentrated sulfuric acid

[0189] ts: Flow time of polyimide resin solution

[0190] C: 0.5g / dL

[0191]

[0192] The melting point Tm, ...

manufacture example 1

[0235] [Production example 1] Production of polyimide resin 1

[0236]2-(2-Methoxyethoxy)ethanol (Nippon Emulsifier Co., Ltd. Company make) 500g and pyromellitic dianhydride (Mitsubishi Gas Chemical Co., Ltd. make) 218.12g (1.00mol), after nitrogen purging, it stirred at 150 rpm so that it may become a uniform suspension solution. On the other hand, using a 500 mL beaker, 49.79 g (0.35 mol) of 1,3-bis(aminomethyl)cyclohexane (manufactured by Mitsubishi Gas Chemical Co., Ltd., cis / trans ratio=7 / 3), 1,8-octa 93.77 g (0.65 mol) of methylene diamine (manufactured by Kanto Chemical Co., Ltd.) 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. Although exothermic heat is caused by dropwise addition, it is adjusted so that the internal temperature is within 40 to 80°C. During the dropwise addition of the mixed diamine solution, the nitrogen purging state was set, and the rotati...

Embodiment 1～9、 comparative example 1～2

[0247] Examples 1-9, Comparative Examples 1-2 (production and evaluation of polyimide resin composition)

[0248] The polyimide resin 1 obtained in Production Example 1 and each component shown in Table 2 and Table 3 were fully mixed by dry blending. The obtained mixed powder was extruded using a laboratory kneading extrusion device (Labo Plastomill, manufactured by Toyo Seiki Seisaku-sho, Ltd.) at a cylinder temperature of 350° C. and a screw rotation speed of 70 rpm. The strand extruded from the extruder was air-cooled, and pelletized by a pelletizer ("Fan cutter FC-Mini-4 / N" manufactured by Hoshi Plastic Co., Ltd.). The obtained pellets were dried at 190° C. for 10 hours, and then used for injection molding.

[0249] Injection molding was performed using an injection molding machine (manufactured by FANUC CORPORATION "ROBOSHOT α-S30iA") at a cylinder temperature of 350°C, a mold temperature of 200°C, and a molding cycle of 50 seconds, and moldings of predetermined shapes u...

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Abstract

This polyimide resin composition contains: a polyimide resin (A) including a repeating constituent unit represented by formula (1) and a repeating constituent unit represented by formula (2), wherein the content ratio of the repeating constituent unit represented by formula (1) to the total of the repeating constituent unit represented by formula (1) and the repeating constituent unit represented by formula (2) is 20-70 mol%; and an antioxidant (B), wherein the antioxidant (B) contains a cerium-containing compound (B2) or at least one copper compound (B1) selected from the group consisting of copper fluoride, copper bromide, copper iodide, and copper carboxylate. (R1 represents a divalent group having 6-22 carbon atoms and including at least one alicyclic hydrocarbon structure. R2 represents a divalent linear aliphatic group having 5-16 carbon atoms. X1 and X2 each independently represent a tetravalent group having 6-22 carbon atoms and including at least one aromatic ring.).

Description

technical field [0001] The present invention relates to polyimide resin compositions. Background technique [0002] Based on the rigidity of molecular chains, resonance stabilization, and strong chemical bonding, polyimide resins are useful engineering plastics with high thermal stability, high strength, and high solvent resistance, and are used in a wide range of fields. In addition, since heat resistance, strength, and chemical resistance can be further improved in the polyimide resin which has crystallinity, utilization as a metal substitute etc. is expected. However, polyimide resin has high heat resistance, but on the other hand, it does not exhibit thermoplasticity and has a problem of low molding processability. [0003] As a polyimide molding material, high heat-resistant resin VESPEL (registered trademark) and the like are known (Patent Document 1). Even at high temperatures, the fluidity is extremely low, so molding processing is difficult. Since it is necessary ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10C08K5/098C08L79/08C08K3/16
CPCC08L79/08C08K5/098C08K3/16C08K3/22C08K2003/2213C08G73/1042C08G73/1082C08K3/014C08K5/13C08G73/10C08K5/005C08K13/02
Inventor 酒井敦史佐藤勇希
Owner MITSUBISHI GAS CHEM CO INC
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