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C-grade modified bismaleimide glass fiber reinforced mould plastic

A technology of bismaleimide glass fiber and bismaleimide resin, which is applied in the field of molding compounds and can solve problems such as unsatisfactory heat resistance

Active Publication Date: 2013-03-20
HUNAN HENGYUAN NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Epoxy resin is a kind of thermosetting resin with excellent performance such as high adhesion, good strength and low price, but its heat resistance is not ideal. If BMI and epoxy resin are combined to prepare an imine-epoxy composite resin , can obtain excellent properties such as high heat resistance, strong adhesive force, and good mechanical properties

Method used

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  • C-grade modified bismaleimide glass fiber reinforced mould plastic
  • C-grade modified bismaleimide glass fiber reinforced mould plastic
  • C-grade modified bismaleimide glass fiber reinforced mould plastic

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Embodiment

[0037] 1. The ratio of modified bismaleimide resin

[0038] Table 1 is the proportioning of modified bismaleimide resin

[0039] Table 1

[0040] components parts by mass Bismaleimide (BMI) 7.9 4,4’-Diphenylsulfonediamine (DDS) 4.6 Diaminodiphenyl ether (DDE) 4.6 Heat-resistant epoxy resin F-51 21 toluene 34.1 imidazole 0.6

[0041] The preparation method of this modified bismaleimide resin comprises the following steps:

[0042] (1) Add bismaleimide, 4,4'-diphenylsulfonediamine, and toluene into the reaction kettle in a certain order, heat up to 125°C, stir and reflux, keep warm for 1.5 hours, then cool down to 90°C ℃.

[0043] (2) Add the formula amount of diaminodiphenyl ether, and continue to heat up to? °C, stirred and refluxed for 1 h, distilled 1 / 2 mass ratio of toluene.

[0044] (3) Cool down to 100°C, add heat-resistant epoxy resin in the prescribed amount, keep warm at 90-100°C for 0.5h, cool down to 85°C, adj...

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Abstract

The invention relates to C-grade modified bismaleimide glass fiber reinforced mould plastic and a preparation method thereof. The mould plastic is formed by covering modified bismaleimide resin on an alkali-free glass fiber yarn, wherein the modified bismaleimide resin is formed from the following components in parts by mass: 7.7-8.1 parts of bismaleimide resin, 4.5-4.7 parts of 4,4'-diphenyl sulfone diamine, 4.5-4.7 parts of diamino diphenyl ether, 20-22 parts of heat-resisting epoxy resin, 33-35 parts of solvent and 0.5-0.7 parts of auxiliary agent. According to the C-grade modified bismaleimide glass fiber reinforced mould plastic disclosed by the invention, the normal-state bending strength is 669 MPa, the thermal-state bending strength is 230 MPa (at 200 DEG C), the thermal deformation temperature is 265 DEG C and the electric strength reaches 21 MV / m which is better than that of a Germany Siemens product.

Description

technical field [0001] The invention relates to a molding compound, in particular to a C-level modified bismaleimide glass fiber reinforced molding compound. Background technique [0002] Bismaleimide resin (BMI) is widely used for its excellent heat resistance, insulation, wave transparency, radiation resistance, flame retardancy, and molding processability similar to epoxy resin, but due to BMI curing The high cross-linking density and strong molecular chain rigidity of the material make BMI extremely brittle, poor impact strength, small elongation at break, and poor toughness largely limit the application in aerospace, electrical engineering, machinery, transportation, etc. Applications in power transformation, electric locomotives, ships and other fields. Therefore, improving the mechanical properties of bismaleimide resin has always been one of the important research topics at home and abroad. [0003] According to our research, bismaleimide resin (BMI) has good compa...

Claims

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Application Information

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IPC IPC(8): C08G59/56C08L63/00C08L79/08C08K7/14
Inventor 高禄生易江洲李孟德
Owner HUNAN HENGYUAN NEW MATERIAL TECH CO LTD
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