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Polyamide-imide foam and its preparation method

A technology of polyamide-imide and foam, which is applied in the field of polyamide-imide foam and its preparation, can solve the problems of high foam material density, complicated equipment, and inaccessibility, and achieve the effect of simple process

Active Publication Date: 2016-06-01
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

However, the foaming process equipment is relatively complicated and the density of the foamed material is as high as 300g / cm 3 , lower density soft foams cannot be obtained

Method used

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  • Polyamide-imide foam and its preparation method

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preparation example Construction

[0025] A preparation method of polyamideimide foam, comprising:

[0026] A) mixing trimellitic anhydride, foaming agent, catalyst and surfactant in a solvent to obtain a first solution;

[0027] B) mixing the first solution and the polyisocyanate solution, stirring and foaming to obtain a foam intermediate;

[0028] C) Imidating the foam intermediate to obtain polyamideimide foam.

[0029] In the present invention, firstly, trimellitic anhydride, foaming agent, catalyst and surfactant are mixed in a solvent to obtain a first solution. The present invention is not limited to the mixing method, and the mixing method known to those skilled in the art is sufficient, preferably stirring and mixing, and the temperature of the stirring and mixing is preferably 25° C. to 30° C.

[0030] In the present invention, the solvent in the step A is preferably selected from one of N-methylpyrrolidone, N,N'-dimethylacetamide, and N,N'-dimethylformamide; more preferably selected from One of N...

Embodiment 1

[0048] 148g of trimellitic anhydride, 10g of methanol, 12g of deionized water, 17g of DC-193, 6.5g of polyethylene glycol, 0.1g of triethanolamine and 0.1g of dibutyltin dilaurate were added to 120g of N,N'-dimethylformamide (DMF ) solution, stirred and dissolved at room temperature to obtain the first solution.

Embodiment 2

[0050] 100 g of polyphenylpolymethylene polyisocyanate was dissolved in 100 g of N,N'-dimethylformamide to obtain a second solution.

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Abstract

The invention provides a preparation method of polyamide-imide foam. The preparation method comprises the steps of: mixing trimellitil anhydride, a foaming agent, a catalyst and a surface active agent in a solvent to obtain a first solution; mixing the first solution with polyisocyanate, stirring and foaming to obtain a foam intermediate; and imidizing the foam intermediate to obtain the polyamide-imide foam. The trimellitil anhydride and polyisocyanate are adopted for polymerization reaction, and simultaneously, the gas is generated to foam and shape a polymer. The polyamide-imide foam obtained by adopting the trimellitil anhydride and polyisocyanate for polymerization reaction is high in thermal stability and low in density; and according to the polyamide-imide foam and the preparation method thereof, no complicated preparation conditions of high temperature for reaction are needed, and the technology is simple.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polyamide-imide foam and a preparation method thereof. Background technique [0002] Polyamide-imide is a class of polymers that contain both heat-resistant imide rings and flexible amide groups in the main chain structure. Polyamide-imide combines the performance advantages of polyamide and polyimide, and has excellent heat resistance, dielectric properties, mechanical properties and chemical stability. Although the heat resistance of the amide group contained in the main chain of polyamideimide is lower than that of polyimide, the amide group can reduce the rigidity of the molecular chain and improve the solubility, thereby improving the rheological properties and processing of the polymer. performance. At the same time, polyamide-imide has excellent anti-ablation performance and electromagnetic properties under high temperature and high frequency conditions, so i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/06C08J9/08C08G73/14
Inventor 陈文慧郭海泉董志鑫杜志军邱雪鹏高连勋
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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