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Method for preparing polyether imide copolymer by bisubstituted compound and bisphenol

A technology of polyetherimide copolymer and polyetherimide, which is applied in the field of preparing polyetherimide copolymers from double-substituted compounds and bisphenols, can solve the problems of low molecular weight, reduce production costs, and facilitate recycling The effect of reuse

Inactive Publication Date: 2006-07-19
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyetherimides can also be prepared from bis-nitrophthalimides and bisphenols, but except for individual varieties, the molecular weight of the resulting polymerization is also low (Polymer Science Journal: Polymer Chemistry Edition, 1980, Vol, 18 , 3069-3080

Method used

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  • Method for preparing polyether imide copolymer by bisubstituted compound and bisphenol
  • Method for preparing polyether imide copolymer by bisubstituted compound and bisphenol
  • Method for preparing polyether imide copolymer by bisubstituted compound and bisphenol

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Add 0.01 moles (2.28g) of bisphenol A, 14.7 grams of diphenylsulfone and 0.02 moles (2.0g) of 40% NaOH solution into a three-neck flask, pass nitrogen to remove oxygen, add 25 milliliters of xylene, and reflux with water for 2 hours Afterwards, add 0.009 mole (4.761g) of 4,4'-bis(4-chlorophthalimide) diphenyl ether, 0.001 mole (0.287g) of 4,4-dichlorodiphenyl sulfone, at 160 ℃ polymerization reaction for 20 hours. The resulting polymer solution was poured into 3% dilute hydrochloric acid in a thin stream, filtered and ground. The solvent was extracted with ethanol, and the intrinsic viscosity of the obtained polymer was 0.32dL / g.

Embodiment 2

[0040] Add 0.01 moles (2.28g) of bisphenol A, 45 grams of diphenyl sulfone and 0.02 moles (2.0g) of 40% NaOH solution into a three-neck flask, pass nitrogen to remove oxygen, add 40 milliliters of xylene, and reflux with water for 4 hours After that, add 0.009 mole (4.761g) of 4,4'-bis(4-chlorophthalimide) diphenyl ether, 0.001 mole (0.287g) of 4,4-dichlorodiphenyl sulfone at 300 ℃ polymerization reaction for 2 hours. The resulting polymer solution was poured into 3% dilute hydrochloric acid in a thin stream, filtered and ground. The solvent was extracted with acetone, and the intrinsic viscosity of the obtained polymer was 0.65dL / g.

Embodiment 3

[0042] Add 0.01 moles (2.28g) of bisphenol A, 45 grams of diphenyl sulfone and 0.02 moles (2.8g) of 40% KOH solution into a three-neck flask, pass nitrogen to remove oxygen, add 25 milliliters of xylene, and reflux with water for 4 hours Finally, add 0.009 mole (4.932g) of 4,4'-bis(4-nitrophthalimide) diphenyl ether, 0.001 mole (0.287g) of 4,4-dichlorodiphenyl sulfone, in Polymerization at 180°C for 200 hours. The obtained polymer solution was poured into 3% dilute hydrochloric acid in a trickle, filtered and ground. The solvent was extracted with acetone and ethanol, and the intrinsic viscosity of the obtained polymer was 0.47dL / g.

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Abstract

The disclosed polyetherimide copolymer is copolymerized in dichloro-benzenes with the material with disubstituted phthalimide, diamine as NH2-R-NH2 and proper NH2-R-NH2 and 4, 4-dichlorodiphenyl sulfone. This invention reduces cost, simplifies process, and can recover the solvent conveniently.

Description

technical field [0001] The invention belongs to a method for preparing a polyetherimide copolymer from a disubstituted compound and bisphenol. Background technique [0002] As a polymer material, polyetherimide has attracted much attention due to its unique properties and wide application prospects. However, due to the high cost of polyimide synthesized from dianhydride and diamine as monomers, polyetherimide Its application in a wider range is limited. The direct synthesis method using substituted phthalic anhydride as raw material without dianhydride can reduce its cost. As early as 1974, General Electric Company (GE Co.) of the United States disclosed a patent (US pat.3787,364) on the preparation of polyetherimide from dichlorophthalimide and bisphenol, but the patent disclosed The obtained polyetherimide molecular weight of the method is low, is difficult to apply. In 1997, the company disclosed a method for synthesizing high molecular weight polyetherimide by first p...

Claims

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Application Information

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IPC IPC(8): C08G73/10C08G65/40
Inventor 尚振平丁孟贤高连勋
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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