Polyimide foam composite material, and preparation method and application thereof

A technology of polyimide and composite materials, applied in the direction of chemical instruments and methods, synthetic resin layered products, lamination, etc., can solve the problem of tensile strength and poor scratch resistance, shear resistance The comprehensive properties of imide foam materials and the high glass transition temperature of polyimide foam achieve the effects of reducing the amount of smoke in sudden accidents, easy promotion, and excellent thermal insulation performance

Active Publication Date: 2019-07-16
BEIJING RADIATION APPL RES CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, as a soft foam material, its tensile strength, scratch resistance, and shear resistance are not good, and it is easily damaged during its construction, and its surface feels bad to the touch, requiring further treatment and processing
It is a feasible method to apply other types of materials on its surface. Referring to other materials, this type of material can be sprayed or coated on the surface of polyimide foam. The adhesives used are epoxy glue, polyurethane glue, Hot melt adhesive, etc., in order to achieve strong bonding with other materials, but this bonding reduces the flame retardancy of the foam, increases its smoke density and thermal conductivity when burning, which seriously affects the polyimide Comprehensive properties of foam materials
[0004] Due to the high glass transition temperature of polyimide foam and its high viscosity when melted, it is difficult to bond with glass fiber cloth, aluminum foil glass fiber cloth or spinning wheel cloth by making it hot-melt to generate enough viscosity. accomplish
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  • Polyimide foam composite material, and preparation method and application thereof

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Comparison scheme
Effect test

Embodiment 1

[0038] The present embodiment provides a kind of preparation method of polyimide foam composite material, wherein, this method comprises the following steps:

[0039] a. Add 32.2g of dried 3,3',4,4'-benzophenone tetraacid dianhydride to a mixed solvent containing 43g of tetrahydrofuran and 9.6g of methanol, raise the temperature to 60°C, keep stirring for 6h and then cool down After reaching room temperature, add 20g of 4,4'-diaminodiphenyl ether (4,4'-ODA), heat up to 60°C and mix for 2 hours, then add 2.0g of AK 8805, and discharge to obtain a precursor solution;

[0040]b. Treat the precursor solution in an oven at 90°C for 30 minutes, then pulverize the dried product and place it in an oven at 120°C for foaming. After 30 minutes, heat up to 200°C for preliminary imidization for 20 minutes;

[0041] c. Cut the foam obtained above to obtain a foam material with a thickness of 3 cm, then apply glass fiber cloth on the surface of the foam material, set the temperature of the h...

Embodiment 2

[0044] The present embodiment provides a kind of preparation method of polyimide foam composite material, wherein, this method comprises the following steps:

[0045] a. Add 32.2g of dried 3,3',4,4'-benzophenone tetraacid dianhydride to a mixed solvent containing 64g of tetrahydrofuran and 9.6g of methanol, raise the temperature to 60°C, and continue stirring for 6h Cool down to room temperature, add 41g of 2,2-bis[4-(4-aminophenoxy)phenyl]propane (BAPP), heat up to 60°C and mix for 2 hours, then add 3g of AK 8805, and discharge to obtain a precursor solution ;

[0046] b. Treat the precursor solution in an oven at 80°C for 60 minutes, then pulverize the dried product and place it in an oven at 140°C for foaming and imidization for 30 minutes;

[0047] c. Cut the foam obtained above to obtain a foam material with a thickness of 1.5 cm, then apply glass fiber cloth on the surface of the foam material, set the temperature of the hot plate of the flat vulcanizer to 290 ° C, and ...

Embodiment 3

[0050] The present embodiment provides a kind of preparation method of polyimide foam composite material, wherein, this method comprises the following steps:

[0051] a. Add 21.8g of dried 1,2,4,5-pyromellitic dianhydride into a mixed solvent containing 64g of tetrahydrofuran and 9.6g of methanol, raise the temperature to 60°C, keep stirring for 6h, then cool down to room temperature, Add 41g of 2,2-bis[4-(4-aminophenoxy)phenyl]propane (BAPP), heat up to 60°C and mix for 2 hours, then add 3g of AK 8805, and discharge to obtain a precursor solution;

[0052] b. Treat the precursor solution in a 90°C oven for 15 minutes, then crush the dried product and place it in a 120°C oven for foaming for 30 minutes, then heat up to a 180°C oven for preliminary imidization , the duration is 45min;

[0053] c. Cut the foam obtained above to obtain a foam material with a thickness of 1.5 cm, and then apply glass fiber cloth on the surface of the foam material. 1.3cm, the hot pressing time i...

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Abstract

The invention provides a polyimide foam composite material, and a preparation method and application thereof. The preparation method comprises the following steps: adding aromatic dianhydride into a tetrahydrofuran/methanol mixed solvent, carrying out heating to dissolve the aromatic dianhydride and carry out an esterification reaction, adding aromatic diamine and a foam stabilizer after the solution is transparent, and uniformly carrying out mixing to obtain a foam precursor solution; drying the foam precursor solution, then crushing the dried solid product to obtain polyester ammonium salt powder, and carrying out foaming and a preliminary imidization reaction to prepare partially imidized polyimide foam; and cutting the partially imidized polyimide foam, then carrying out thermal compounding on the cut product and a reinforcing material, and then carrying out a complete imidization reaction on the product obtained after the thermal compounding to obtain the polyimide foam compositematerial. The polyimide foam composite material provided by the invention has good flame retardancy, heat insulation performance, scratch resistance, and tear and tensile properties, and is low in smoke production amount during high-temperature baking and decomposition;

Description

technical field [0001] The invention relates to a polyimide foam composite material and its preparation method and application, belonging to the technical field of polymer materials. Background technique [0002] Polyimide foam material is a high-performance foam material with good mechanical properties, excellent flame retardant properties, fire resistance and other properties. Compared with other types of foam plastics, it has low density, wide performance adjustment range, easy installation and Disassembly, high temperature resistance and excellent low temperature brittleness; in addition, as a low toxicity foam material, it produces less harmful gas during use, and has been widely used abroad as a heat insulation and noise reduction material. [0003] However, as a soft foam material, its tensile strength, scratch resistance, and shear resistance are not good, and it is easily damaged during its construction, and its surface feels bad to the touch, requiring further trea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/28B32B27/12B32B15/20B32B15/08B32B15/04B32B37/06B32B17/02B32B17/10B32B27/02B32B27/34C08J9/00C08L79/08C08G73/10B29C51/26B29C51/42B29C51/46
CPCB29C51/264B29C51/42B29C51/46B32B5/02B32B5/022B32B5/08B32B5/20B32B5/245B32B15/046B32B15/08B32B15/20B32B37/06B32B2250/02B32B2250/24B32B2262/02B32B2262/0269B32B2262/101B32B2262/14B32B2266/0214B32B2307/304B32B2307/3065B32B2307/54B32B2307/5825B32B2307/584B32B2309/025C08G73/1007C08G73/1028C08G73/1071C08J9/00C08J2379/08
Inventor 酒永斌翟宇翟彤曹巍刘权锋刘暘李伯龙刘江伟赵建中王连才
Owner BEIJING RADIATION APPL RES CENT
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