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3D printed bismaleimide ink and preparation method and application thereof

A bismaleimide, 3D printing technology, applied in the direction of additive processing, etc., can solve the problems of large dimensional shrinkage, no bismaleimide resin, and low printing accuracy

Active Publication Date: 2019-05-17
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its specific processing technology, so far, bismaleimide is still not suitable for the manufacture of components with differentiated, high-precision and complex structures, which greatly limits the application of bismaleimide
[0003] 3D printing technology has the ability to manufacture various customizable, high-precision and complex structures, but due to its high requirements on the rheological properties and photosensitivity of resin printing materials, many traditional high-performance resins are still not suitable for 3D printing technology
Although researchers have developed some engineering materials for 3D printing, such as epoxy resin, polyimide, and polyether ether ketone, etc., there are still problems such as low printing accuracy, large dimensional shrinkage, and poor mechanical properties. many problems
At present, bismaleimide resin cannot be directly used for 3D printing, and there is no 3D printing material based on bismaleimide resin

Method used

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  • 3D printed bismaleimide ink and preparation method and application thereof
  • 3D printed bismaleimide ink and preparation method and application thereof
  • 3D printed bismaleimide ink and preparation method and application thereof

Examples

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preparation example Construction

[0033] The invention provides a kind of preparation method of 3D printing bismaleimide ink, comprises the following steps:

[0034] (1) Prepolymerizing bismaleimide and 2,2'-diallyl bisphenol A to obtain a prepolymer;

[0035] (2) The prepolymer is mixed with a reactive diluent and a photoinitiator to obtain a 3D printing bismaleimide ink.

[0036] In the invention, bismaleimide and 2,2'-diallyl bisphenol A are prepolymerized to obtain a prepolymer. In the present invention, the bismaleimide is preferably N,N'-(4,4'-methylenediphenyl)bismaleimide, N,N'-m-phenylene bismaleimide One or more of imide, N,N'-(1,4-phenylene)bismaleimide; said bismaleimide and 2,2'-diallyl The mass ratio of bisphenol A is preferably 100:(50-100), more preferably 100:(60-80). In the ink system of the present invention, the bismaleimide is still a relatively high component, which can ensure high heat resistance.

[0037] In the present invention, the temperature of the prepolymerization reaction is...

Embodiment 1

[0054] Mix 32g of N,N'-(4,4'-methylenediphenyl)bismaleimide with 24g of 2,2'-diallyl bisphenol A and stir at 140°C for 20 minutes to obtain Uniform and transparent prepolymer. Then add 24g of N-vinylpyrrolidone and continue to stir. After cooling to room temperature, add 0.8g of IR819 and stir well to remove air bubbles, and the final 3D printing bismaleimide ink can be obtained.

[0055] The prepared 3D printing bismaleimide ink is cured by ultraviolet light to obtain a pre-cured product, and the pre-cured product is thermally cured to obtain a cured product; the light intensity of the ultraviolet light is 100W / cm 2 , the UV curing time is 5min, and the heat curing process is 150°C / 2h+180°C / 2h+240°C / 4h.

[0056] Performance testing:

[0057] Infrared spectrum test: N, N'-(4,4'-methylene diphenyl) bismaleimide, 2,2'-diallyl bisphenol A, pre-cured and cured products Infrared test, the obtained IR spectrum is as follows figure 1 shown; from figure 1 It can be seen that, com...

Embodiment 2

[0066] Mix 10g of N,N'-(4,4'-methylenediphenyl)bismaleimide with 7.5g of 2,2'-diallyl bisphenol A and stir at 140°C for 20 minutes Obtain a uniform and transparent prepolymer; then add 5g of N-vinylpyrrolidone and continue to stir, after cooling to room temperature, add 0.225g of IR819 and stir well, then vacuum treatment and centrifugation to remove air bubbles to obtain 3D printed bismaleimide Amine ink.

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Abstract

The invention provides 3D printed bismaleimide ink and a preparation method and application thereof, and belongs to the field of 3D printed high-performance resin-based materials. Bismaleimide is prepolymerized with 2,2'-diallyl bisphenol A to obtain a prepolymer; and the prepolymer is mixed with a reactive diluent and a photoinitiator to obtain the 3D printed bismaleimide ink. The prepared 3D printed bismaleimide ink has the rheological property suitable for 3D printing, has good printability and high printing precision, has similar mechanical and heat resisting properties with traditional bismaleimide resin and has the ability to print complex structures, and printed molded parts have excellent mechanical properties and dimensional stability and can be widely used in aerospace and otherfields; and the 3D printing molding of the bismaleimide resin is realized for the first time.

Description

technical field [0001] The invention relates to the technical field of 3D printing high-performance resin-based materials, in particular to a 3D printing bismaleimide ink and its preparation method and application. Background technique [0002] As a traditional high-performance thermosetting resin, bismaleimide resin has many excellent properties, such as good hygrothermal properties, excellent mechanical properties, high glass transition temperature, low flammability, etc. The existing bismaleimide resin manufacturing process is to form a bismaleimide resin with a desired shape and a high degree of crosslinking by curing at a high temperature in a mold with a specific shape. However, due to its specific processing technology, so far, bismaleimide is still not suitable for the manufacture of components with differentiated, high-precision and complex structures, which greatly limits the application of bismaleimide. [0003] 3D printing technology has the ability to manufactu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/04C08G73/12B33Y70/00
Inventor 王晓龙吴涛蒋盼郭玉雄周峰刘维民
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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