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A kind of reinforced and toughened self-curing rigid polyimide foam and preparation method thereof

A polyimide, strengthening and toughening technology, applied in the field of strengthening and toughening self-curing rigid polyimide foam and its preparation, can solve the problems of increased energy consumption and limited use, and achieve low moisture absorption rate, Energy consumption, environmental protection, non-toxicity, and the effect of enhancing toughness

Active Publication Date: 2019-02-01
自贡中天胜新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the later stage of the reaction, high temperature curing is required, the energy consumption increases, and the use is limited

Method used

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  • A kind of reinforced and toughened self-curing rigid polyimide foam and preparation method thereof
  • A kind of reinforced and toughened self-curing rigid polyimide foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] First, hollow glass microspheres and short glass fibers are subjected to surface modification treatment with coupling agent KH550, the mass ratio of KH550 to glass microspheres / glass fibers is 1:100, and the surface modification treatment is specifically: The above-mentioned glass microspheres / glass fibers are soaked in KH550 aqueous solution with a concentration of 1% by mass for 1 hour, dried at 100° C., and ready for use.

[0035]a. Add a certain amount of aromatic dianhydride into a reaction kettle with furfuryl alcohol as a solvent, then add fatty alcohol for esterification reaction to a clear and transparent solution, control the reaction temperature at 45°C, and react for 2 hours; after the esterification reaction is completed, add Catalyst A, surfactant, stir evenly. Add a certain amount of modified hollow glass microspheres and modified short glass fibers, and use ultrasonic dispersion technology to uniformly disperse them in it to synthesize a foam precursor s...

Embodiment 2

[0042] First, hollow glass microspheres and short glass fibers are subjected to surface modification by coupling agent KH550, the mass ratio of KH550 to glass microspheres / glass fibers is 1:100, and the surface modification process is specifically: The glass microspheres / glass fibers are soaked in 1% KH550 aqueous solution for 1 hour, dried at 100°C, and ready for use.

[0043] a. Add a certain amount of aromatic dianhydride into a reaction kettle with furfuryl alcohol as a solvent, then add fatty alcohol for esterification reaction to a clear and transparent solution, control the reaction temperature at 40°C, and react for 3 hours; after the esterification reaction is completed, add Catalyst A, surfactant, stir evenly. Add a certain amount of modified glass microspheres and modified glass fibers, and use ultrasonic dispersion technology to uniformly disperse them in it to synthesize a foam precursor solution;

[0044] b. Add a certain amount of acid anhydride and catalyst B ...

Embodiment 3

[0049] First, hollow glass microspheres and short glass fibers are subjected to surface modification by coupling agent KH570, the mass ratio of KH570 to glass microspheres / glass fibers is 1:100, and the surface modification process is specifically: The glass microspheres / glass fibers are soaked in 1% KH570 aqueous solution for 1 hour, dried at 100°C, and ready for use.

[0050] a. Add a certain amount of aromatic dianhydride into a reaction kettle with furfuryl alcohol as a solvent, then add fatty alcohol for esterification reaction to a clear and transparent solution, control the reaction temperature at 45°C, and react for 2 hours; after the esterification reaction is completed, add Catalyst A, surfactant, stir evenly. Add a certain amount of modified glass microspheres and modified glass fibers, and use ultrasonic dispersion technology to uniformly disperse them in it to synthesize a foam precursor solution;

[0051] b. Add a certain amount of acid anhydride and catalyst B ...

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Abstract

The invention relates to hard polyimide foam modified material, and in particular to a reinforcing and toughening self-setting hard polyimide foam material and a preparation method thereof. The preparation method comprises the following steps: dissolving aromatic dianhydride into a solvent, adding fatty alcohol for carrying out an esterification reaction, adding a catalyst and a surfactant in the solvent after completing the reaction, then sequentially adding modifiers, and uniformly dispersing by adopting an ultrasonic dispersion technology, thus obtaining a foam precursor solution; adding acid anhydride into isocyanate so as to react with the isocyanate, and then adding phosphoric acid, thus preparing and obtaining modified black material; enabling the foam precursor solution to react with the modified black material according to a proportion, immediately pouring the mixture into a mold after stirring, carrying out normal-pressure foam forming, and carrying out self-setting demolding, thus obtaining the reinforcing and toughening self-setting hard polyimide foam material. The reinforcing and toughening self-setting hard polyimide foam material prepared by the invention has high strength, good temperature resistance and very low moisture absorption rate, and can be used as a structural material; a preparation process is environment-friendly and energy-saving, and the technology is simple.

Description

technical field [0001] The invention relates to the field of rigid polyimide foam modified materials, in particular to a reinforced and toughened self-curing rigid polyimide foam and a preparation method thereof. Background technique [0002] Polyimide foam (PIF for short) is an aromatic heterocyclic polymer containing imide groups in the main chain. It is one of the foam materials with the best thermal stability among polymers. The long-term use temperature range is -200 ~300°C, no obvious melting point, can withstand high temperature above 400°C for a short time. The material has excellent comprehensive properties such as high insulation performance, intrinsic flame retardancy, environmental protection and non-toxicity, wide temperature range, low thermal conductivity, radiation resistance, light weight, easy processing and installation, and can be used in ultra-high temperature, ultra-low temperature, high-salt Long-term service under extreme conditions such as fog, stro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08K9/06C08K7/28C08K7/14C08J9/12C08G73/10
CPCC08G73/1035C08J9/122C08J2203/06C08J2205/052C08J2379/08C08K7/14C08K7/28C08K9/06C08K2201/003C08K2201/004C08L2201/08C08L2203/14C08L79/08
Inventor 李超程杰黄勇贺进进
Owner 自贡中天胜新材料科技有限公司
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