High-performance high-temperature-resistant modified epoxy resin

An epoxy resin, modified technology, applied in the field of modified epoxy resin and its preparation, can solve the problems of affecting the thermal properties of the material, reducing the glass transition temperature of the material, and the brittleness of the cured resin restricting the use, etc., to achieve good processing performance and the effect on the mechanical properties

Active Publication Date: 2011-08-17
SHANGHAI MASTECK ENVIRONMENTAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Epoxy resins cured with anhydrides have excellent thermal properties, damp heat aging properties, and electrical insulation properties, but the brittleness of the cured resin limits its use
At present, the most commonly used toughening method is to add oligomers with flexible structures such as polyethylene glycol to the resin, but this method often affects the thermal properties of the material, and will reduce the glass transition temperature of the material to a certain extent

Method used

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  • High-performance high-temperature-resistant modified epoxy resin
  • High-performance high-temperature-resistant modified epoxy resin
  • High-performance high-temperature-resistant modified epoxy resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In this embodiment, the epoxy resin is selected from DER 331 and the benzoxazine resin is selected from BENA, the anhydride curing agent is selected from MTHPA, and the curing agent is selected from 2E4MZ. The specific performance and formula (parts by weight) are as shown in Table 1:

[0038]

Embodiment 2

[0040] In this embodiment, epoxy resin selects epoxy 2021P for use, benzoxazine resin selects BENF for use, anhydride curing agent selects MTHPA for use, and curing agent selects 2MZ for use, and specific performance and formula (weight parts) are as shown in Table 2:

[0041] Table 2

[0042]

Embodiment 3

[0044] In this embodiment, the epoxy resin is selected from DER 354, the benzoxazine resin is selected from BENF, the anhydride curing agent is selected from MTHPA, and the curing agent is selected from 2P4MZ. The specific performance and formula (parts by weight) are as shown in Table 3:

[0045] table 3

[0046]

[0047]The above examples are illustrated by taking three imidazole accelerators 2E4MZ, 2MZ and 2P4MZ as examples, and other imidazole accelerators such as: 2PZ, C11Z, C17Z, 1B2MZ, SFZ, FFZ, 2MZL, 2MZ-CN, 2PZ-CN, C11Z-CN, 2E4MZ-CN, 2MZ-CNS, 2PZ-CNS, 2E4MZ-CNS, C11Z-CNS and 2MZ-A can also obtain the same effect by replacing the above three imidazole accelerators.

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Abstract

The invention provides a benzoxazine modified epoxy resin composition, which comprises the following components in parts by weight: 10-50 parts of benzoxazine resin, 10-100 parts of epoxy resin, 40-120 parts of anhydride curing agent and 2-4 parts of imidazole accelerator. The benzoxazine resin is taken as a modifier for modifying an epoxy resin crosslinked anhydride curing agent, so that the glass transition temperature and shock strength of a crosslinkging product of epoxy resin and the anhydride curing agent can be enhanced at the same time, and the technical problem that the glass transition temperature and shock strength cannot be enhanced at the same time is well solved. The obtained benzoxazine modified epoxy resin keeps high temperature resistance of benzoxazine and has high processability and mechanical property.

Description

technical field [0001] The invention relates to a modified epoxy resin and a preparation method thereof, in particular to a high-performance high-temperature-resistant modified resin obtained by modifying an epoxy resin with a benzoxazine resin. Background technique [0002] Thermosetting resin-based composites are currently the most studied and widely used composite materials. It has the characteristics of light weight, high strength, large modulus, good corrosion resistance, excellent electrical properties, wide source of raw materials, easy processing and molding, high production efficiency, etc., and has material designability and other special properties, such as vibration reduction, With the characteristics of noise reduction, electromagnetic wave transmission, stealth, and ablation resistance, it has become an irreplaceable important material in the national economy, national defense construction, and technological development. The most commonly used resins in thermo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/02C08L63/00C08G59/22C08G59/42C08G59/14
Inventor 庄田黄健翔杨菲谢坤
Owner SHANGHAI MASTECK ENVIRONMENTAL
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