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Synthesis method of polysulfone-polyimid copolymer

A technology of polyimide copolymer and diphthalimide, which is applied in the field of synthesis of polysulfone-polyimide copolymer, can solve the problems of harsh reaction conditions, low yield, difficult separation and purification, etc., and achieve reduction The effect of dosage, improvement of performance and reduction of production cost

Inactive Publication Date: 2004-05-05
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

U.S. Patent [Itatani, US Pat., 4 568 715 (1986); Itatani, US Pat., 4 247 443 (1981); Sasaki, US Pat., 4 290 936 (1981); Sasaki, US Pat., 4 473 523 ( 1984); Kaneda, T., J.Appl.Polym.Sci; 32,3151 (1986) etc.] the disclosed traditional biphenyl polyimide preparation method is to obtain polyimide by biphenyl dianhydride and diamine reaction Amines, because the synthesis steps of biphenyl dianhydride are many, and the catalyst is expensive, or the yield is low, or the reaction conditions are harsh, or the separation and purification are difficult, the production cost of biphenyl polyimide is too high, so that the scope of application restricted

Method used

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  • Synthesis method of polysulfone-polyimid copolymer
  • Synthesis method of polysulfone-polyimid copolymer
  • Synthesis method of polysulfone-polyimid copolymer

Examples

Experimental program
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Embodiment 1

[0024] Add 5mmol of nickel bromide, 20mmol of triphenylphosphine and 150mmol of zinc powder into the reaction flask, fill with nitrogen to remove oxygen, add 25ml of DMAc, and stir the reaction at 120°C. After the system turns reddish brown, add 150ml of DMAc and 25mmol of di (4-(4-Chlorophthalimido)phenyl) ether and 25mmol dichlorodiphenyl sulfone were reacted for 8h, then the reactant was poured into 1000ml 25% HCl / ethanol solution, stirred for 30min, Filter, reflux the precipitate with 500ml of ethanol for 8h, filter, and dry at 100°C to obtain 16.2g of product with a yield of 96%. Mix cresol as a solvent, and measure the inherent viscosity at 30°C to be 0.21dl / g.

Embodiment 2

[0026] Add 5mmol of nickel bromide, 60mmol of triphenylphosphine and 200mmol of zinc powder into the reaction flask, fill with nitrogen to remove oxygen, add 30ml of DMAc, and stir the reaction at 90°C. After the system turns reddish brown, add 120ml of DMAc and 25mmol of di (4-(3-Chlorophthalimido)phenyl) ether and 25mmol dichlorodiphenyl sulfone were reacted for 5h, then the reactant was poured into 1000ml 25% HCl / ethanol solution, stirred for 20min, Filter, reflux the precipitate with 300ml of ethanol for 6h, filter, and dry at 100°C to obtain 16.0g of product with a yield of 95%. Mix cresol as a solvent, and measure the inherent viscosity at 30°C to be 0.16dl / g.

Embodiment 3

[0028] Add 5mmol of nickel bromide, 50mmol of triphenylphosphine and 280mmol of zinc powder into the reaction flask, fill with nitrogen to deoxygenate, add 40ml of DMAc, and stir the reaction at 60°C. After the system turns reddish brown, add 620ml of DMAc and 25mmol of di (4-(4-chlorophthalimido)phenyl)methane and 25mmol dichlorobenzophenone were reacted for 3h, then the reactant was poured into 1000ml 25% HCl / ethanol solution, stirred for 40min, Filtrate, reflux the precipitate with 500ml of ethanol for 6h, filter, and dry at 100°C to obtain 16.5g of product with a yield of 98%, mixed with cresol as a solvent, and an inherent viscosity at 30°C of 0.2dl / g.

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Abstract

A polysulfone-polyimide copolymer is prepared from polysulfone, polyimide, Ni as catalyst, triphenyl phosphine as coordinate agent, Zn powder as reducer and non-protonic solvent as reaction medium through reacting at 60-120 deg.C, adding non-protonic solvent, dichlorodiphthaleine imide prepared from chlorophenyl anhydride and diamine, and the dichloroaryl compound and its derivative, and continuously reacting for 2-8 hr. Its advantages are high output rate (91-100%), high performance, and low cost.

Description

technical field [0001] The invention belongs to the synthesis method of polysulfone-polyimide copolymer. Background technique [0002] As a polymer material, polyimide containing biphenyl structure has attracted much attention due to its unique properties and wide application prospects. High cost and difficult processing are the main problems in the production of polyimide. U.S. Patent [Itatani, US Pat., 4 568 715 (1986); Itatani, US Pat., 4 247 443 (1981); Sasaki, US Pat., 4 290 936 (1981); Sasaki, US Pat., 4 473 523 ( 1984); Kaneda, T., J.Appl.Polym.Sci; 32,3151 (1986) etc.] the disclosed traditional biphenyl polyimide preparation method is to obtain polyimide by biphenyl dianhydride and diamine reaction Amines, because the synthesis steps of biphenyl dianhydride are many, and the catalyst is expensive, or the yield is low, or the reaction conditions are harsh, or the separation and purification are difficult, the production cost of biphenyl polyimide is too high, so that...

Claims

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Application Information

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IPC IPC(8): C08G75/30
Inventor 张所波吴叔青
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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