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Production method of hard polyimide foam material

A polyimide and foam material technology, applied in the field of plastic foaming, can solve the problems of complex foaming process and high production cost

Active Publication Date: 2020-10-20
GUIZHOU AEROSPACE TIANMA ELECTRICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen from this that the advantage of the two-step method is that the prepared foam has better comprehensive properties, but its foaming process is more complicated and the production cost is higher.

Method used

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  • Production method of hard polyimide foam material
  • Production method of hard polyimide foam material

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A kind of production method of rigid polyimide foam material, comprises the steps:

[0040] (1) Preparation of polyamic acid precursor powder: adding binary anhydride and diamine to a polar solvent and stirring to obtain a polyamic acid precursor solvent, and drying by heating to obtain a polyamic acid precursor powder;

[0041] (2) Preparation of polyamide resin precursor powder: add dibasic anhydride and fatty alcohol into polar solvent and stir, then add isocyanate and stir to obtain polyamide resin precursor solution, heat and dry to obtain polyamide Lipid precursor powder;

[0042] (3) Preparation of foaming precursor: the polyamic acid precursor powder of step (1) and the polyamide resin precursor powder of step (2) are stirred, add a foam stabilizer and a foaming agent and stir to obtain foaming Precursor;

[0043] (4) Molding and foaming molding: adding the foaming precursor to the mold, and placing the mold in a microwave oven for molding and foaming;

[004...

Embodiment 2

[0060] The difference from Example 1 is that in step (1), the number of parts of the dibasic anhydride, diamine, and polar solvent is 3, 2, and 5, and other conditions remain unchanged.

Embodiment 3

[0062] The difference from Example 1 is that in steps (1) and (2), the heating and drying process is as follows: the solvent is put into a vacuum drying oven, the vacuum is -0.2MPa, the temperature is 150°C, and the time is 5h . , other conditions remain unchanged.

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Abstract

The invention belongs to the technical field of plastic foaming, and particularly relates to a production method of a hard polyimide foam material. The production method comprises the following steps:mixing imidic acid precursor powder and imide ester precursor powder, adding a foam stabilizer and / or a foaming agent, carrying out uniform mixing, and carrying out foaming die pressing to obtain thehard polyimide foam material, wherein the imidic acid precursor powder is prepared by a reaction of dianhydride and diamine, and the imide ester precursor powder is prepared by reacting dianhydride with fatty alcohol to obtain diacid diester and reacting the diacid diester with isocyanate. The material has good mechanical properties, flame retardancy, high and low temperature resistance and the like, and can be used as a structural member in the fields of aerospace, marine ships and warships and the like.

Description

technical field [0001] The invention belongs to the technical field of plastic foaming, and in particular relates to a production method of a rigid polyimide foam material. Background technique [0002] Polyimide refers to a polymer containing imide rings (-CO-N-CO-) on the main chain. It has excellent heat resistance, low temperature resistance, dilute acid resistance, mechanical properties, dielectric properties, low thermal expansion coefficient, high radiation resistance, self-extinguishing flame retardant properties, and non-toxic characteristics. Polyimide foam has strong heat resistance, good flame retardancy, no harmful gas, and is easy to install. It is a widely used heat insulation and noise reduction material, and is widely used in aviation, aerospace, navigation, transportation, construction and other fields. It is used for body filling, pipe lining, radar shield, etc., for heat preservation, heat insulation, noise reduction, etc. [0003] At present, there are...

Claims

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Application Information

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IPC IPC(8): C08J9/12C08L79/08C08G73/10B29C43/52B29C43/56B29C35/08
CPCC08J9/125C08G73/1007C08G73/1035C08G73/1071B29C43/52B29C43/56B29C35/0805C08J2379/08C08J2479/08C08J2203/10B29C2035/0855
Inventor 柴鲜花丁泽杨大磊史建超刘方辉
Owner GUIZHOU AEROSPACE TIANMA ELECTRICAL TECH
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