Precured glass fiber cloth impregnation material and preparation method thereof

A technology of glass fiber cloth and impregnating material, which is applied in the field of pre-cured glass fiber cloth impregnating material and its preparation, which can solve the problems of short storage time, high brittleness and low toughness of composite material products of pre-impregnated materials, and achieve good commercial effect and performance Good, cost-reducing effect

Active Publication Date: 2014-01-08
SICHUAN DONGFANG INSULATING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The benzoxazine monomers and their resins of these two structures have some outstanding flexibility advantages, which can be used to improve and make good use of them to make glass fiber cloth composite materials (laminated, molded and rolled) products, although these are different The manufacturing process of resin system pre-impregnated materials is relatively mature, but because of the high cost or the difficulty of obtaining raw materials, it is not suitable for the manufacture of large quantities of general engineering composite materials and electrical insulation products.
In the prior art, the pre-impregnated materials still have short storage time and require cold storage at low temperature, which may easily cause the cured composite material products to have the disadvantages of low toughness and high brittleness.

Method used

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  • Precured glass fiber cloth impregnation material and preparation method thereof
  • Precured glass fiber cloth impregnation material and preparation method thereof
  • Precured glass fiber cloth impregnation material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Put 160kg of amine compounds (aniline: m-phenylenediamine: 1,6 hexamethylenediamine = 4:3:1), 100kg of maleic anhydride and 375kg of toluene into the reactor, and heat up rapidly under stirring React at 80°C for 1 hour, cool down to 5°C-9°C, then add 250kg of formaldehyde solution (40%), control the temperature not to exceed 30°C and react for 0.5-1 hour, adjust pH = 6-8, then add 165kg Phenolic compounds (phenol:cardanol=4:1) and 125kg toluene, stirred and reacted at 85°C for 2 hours, separated into organic phase and water phase after standing, removed the water in the lower part of the reactor, and added 375kg of acetone , and stirred for 0.5 hours to obtain a benzene-horse resin solution.

Embodiment 2

[0061] Put 160kg of amine compounds (aniline: m-phenylenediamine = 4:3), 100kg of maleic anhydride and 375kg of toluene into the reactor together. Under stirring, rapidly raise the temperature to 80°C for 1 hour, then cool down to After 22°C~25°C, add 250kg of formaldehyde aqueous solution (40%), control the temperature not to exceed 30°C for 0.5~1 hour, adjust the pH=6~8, and then add 160kg of phenolic compounds (phenol: cresol = 1:2) and 125kg of toluene, stirred and reacted at a temperature of 85°C for 2 hours, separated into an organic phase and an aqueous phase after standing still, removed the water in the lower part of the reactor, added 375kg of acetone, stirred for 0.5 hours, and obtained benzene-matrix resin solution.

Embodiment 3

[0063] Put 190kg of amine compounds (aniline: 1,6 hexamethylenediamine = 2:3), 100kg of maleic anhydride and 420kg of toluene into the reactor together, and rapidly raise the temperature to 70°C for 1.5 hours under stirring. After cooling down to 15°C-18°C, add 280kg of formaldehyde aqueous solution (40%), control the temperature not to exceed 30°C and react for 1 hour, adjust pH = 6-8, then add 190kg of phenolic compounds (phenol: cardanol = 5:1) and 140kg of toluene, stirred and reacted at a temperature of 95°C for 5 hours, separated into an organic phase and an aqueous phase after standing still, removed the water in the lower part of the reactor, added 420kg of acetone, stirred for 0.5 hours, and obtained benzene-matrix resin solution.

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Abstract

The invention discloses a precured glass fiber cloth impregnation material. The precured glass fiber cloth impregnation material is characterized by being composed of a glass fiber cloth which is coated with adhesive by adopting a gluing machine and baked by a baking tunnel of the gluing machine, wherein the adhesive is formed by mixing 1000 parts by mass of benzoxazine-maleic amide resin solution, 15-30 parts by mass of linear isophthalic type unsaturated polyester, 0.2-2 parts by mass of an accelerant and 0.1-0.3 part by mass of initiator. A preparation method of the precured glass fiber cloth impregnation material comprises the following steps: preparing a benzoxazine-maleic amide resin solution, preparing adhesive, coating the adhesive on the glass fiber cloth by adopting a gluing machine, baking the glass fiber cloth by virtue of a baking tunnel of the gluing machine, and rolling, thus the precured glass fiber cloth impregnation material is obtained. By adopting the preparation method of the precured glass fiber cloth impregnation material, the storage time of a benzoxazine resin-based precured glass fiber cloth impregnation material can be prolonged, the fragility of a post processing product is reduced, and stratification is reduced; the precured glass fiber cloth impregnation material can be applied to mould pressing, laminating and rolling of an electric insulation or structural composite material.

Description

technical field [0001] The invention belongs to the application of a composition based on an organic polymer substance, and relates to a precured glass fiber cloth impregnation material and a preparation method thereof. The pre-cured glass fiber cloth impregnating material of the present invention is suitable for electrical insulation or structural composite materials for molding, lamination and rolling in industries such as electrical appliances, electronics, petroleum and machinery. Background technique [0002] In the manufacturing process of glass fiber cloth composite materials (lamination, molding and rolling), it is generally necessary to apply the resin solution, and then cut the impregnated material into a thermoforming machine for curing and molding. The benzoxazine-epoxy resin-based, epoxy-phenolic-based, epoxy-imide-based glass fiber cloth impregnated materials produced in the industry are not stored for a long time at room temperature, which affects their use in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/24C08L79/08C08L67/06C08L63/00C08K5/5399C08L85/02C08G73/12
Inventor 李建学黄杰吴学明
Owner SICHUAN DONGFANG INSULATING MATERIAL
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