Preparation method of polybenzoxazine-imide glass fiber cloth laminate

A technology of imide glass fiber and polybenzoxazine is applied in the field of preparation of layered products, which can solve the problems of limited use field, unsuitable for large batches, low cost performance, etc. The effect of flame retardant properties

Active Publication Date: 2015-11-25
SICHUAN DONGFANG INSULATING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In common polybenzoxazine-epoxy glass fiber cloth laminates, benzoxazine:epoxy=10:6~8, in ordinary polybismaleimide-epoxy glass fiber cloth laminates, double horses Laimide:epoxy=10:3~5, these two glass fiber cloth laminates are not widely used because of their low cost performance, especially polybismaleimide-epoxy glass fiber cloth laminates The price is too high, which further limits the field of use
Chinese patent application CN102391201A discloses the use of 4-hydroxybenzocyclobutene as a raw material to synthesize benzoxazine monomers and resins modified by 4-hydroxybenzocyclobutene; Chinese patent application CN102432560A discloses the use of urushiol as Raw materials, synthesized urushiol-type benzoxazine monomer and its resin with good high temperature resistance; the benzoxazine monomer and its resin of these two structures have some advantages, but they are not suitable because the cost is too high Manufacture of high-volume general-purpose engineering composite materials and electrical insulation material products

Method used

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  • Preparation method of polybenzoxazine-imide glass fiber cloth laminate
  • Preparation method of polybenzoxazine-imide glass fiber cloth laminate
  • Preparation method of polybenzoxazine-imide glass fiber cloth laminate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Put 170kg of amine compounds (aniline: ethylenediamine: p-phenylenediamine = 3:1:1), 80kg of maleic anhydride and 375kg of toluene into the reactor, and rapidly heat up to 70°C under stirring React for 1 hour, cool down to 18°C-20°C, then add 250kg of formaldehyde solution (40%), control the temperature not to exceed 30°C for 1 hour, adjust pH = 6-8, then add 160kg of phenolic compounds (phenol : Cresol=1:1) and 125kg toluene, stirred and reacted at 80℃ for 2 hours, separated into organic phase and water phase after standing, removed the water in the lower part of the reactor, added 250kg of acetone, stirred for 0.5 hours, A benzene-horse resin solution was obtained.

Embodiment 2

[0046] Put 190kg of amine compounds (aniline: p-phenylenediamine: 4,4'-diaminodiphenylsulfone = 5:5:1), 120kg of maleic anhydride and 450kg of toluene into the reactor and stir , quickly raise the temperature to 80°C for 1 hour, cool down to 15°C~18°C, then add 300kg of formaldehyde solution (40%), control the temperature not to exceed 30°C for 0.5~1 hour, adjust the pH=6~8, Then add 200kg of phenolic compound (phenol: cresol = 1:1) and 150kg of toluene, stir and react at a temperature of 85°C for 2 hours, separate into an organic phase and an aqueous phase after standing, remove the water in the lower part of the reactor, Add 300 kg of acetone and stir for 0.5 hour to obtain a benzene-horse resin solution.

Embodiment 3

[0048] Put 180kg of amine compounds (aniline: m-phenylenediamine = 3:2), 100kg of maleic anhydride and 412kg of toluene into the reactor together. Under stirring, rapidly raise the temperature to 95°C for 2 hours, then cool down to After 12℃~15℃, add 275kg of formaldehyde aqueous solution (40%), control the temperature not to exceed 30℃ and react for 1 hour, adjust pH=6~8, then add 180kg of phenolic compounds (phenol:cresol=1: 2) React with 138kg of toluene at a temperature of 90°C for 3.5 hours. After standing still, the layers are divided into organic phase and water phase. Remove the water phase in the lower part of the reactor, add 275kg of acetone, and stir for 0.5 hours to obtain benzene-horse resin solution.

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Abstract

The invention discloses a preparation method of a polybenzoxazine-imine glass fiber cloth laminated board. The preparation method is characterized by comprising the steps of adding an amine compound, maleic anhydride and 3 / 4 of methylbenzene into a reactor, heating to 70-95 DEG C to react for 1-2h, cooling to 5-25 DEG C, adding a water solution of formaldehyde, controlling the temperature to not be higher than 30 DEG C to react for 0.5-2h, adjusting the pH value to 6-8, adding a phenolic compound and residual benzene, reacting at the temperature of 80-100 DEG C for 2-5h, standing for layering, adding acetone into an organic phase, stirring and mixing to obtain a benzoxazine-maleic amide resin solution; mixing the benzoxazine-maleic amide resin solution and an accelerant to prepare an adhesive; coating the adhesive on glass fiber cloth through a glue spreader, roasting to obtain pre-impregnated glass fiber cloth, tailoring the pre-impregnated glass fiber cloth to the size required by a product, and carrying out hot press molding to obtain the polybenzoxazine-imine glass fiber cloth laminated board. The polybenzoxazine-imine glass fiber cloth laminated board is suitable for being used as an electrical insulating material or structural composite in the fields such as motors, electrical appliances, military industry, petroleum and the like.

Description

technical field [0001] The invention belongs to the preparation of layered products, and relates to a preparation method of a polybenzoxazine-imide glass fiber cloth laminated board. The polybenzoxazine-imide glass fiber cloth laminated board prepared by the invention is suitable for electrical insulating materials or structural composite materials in the fields of electronics, motors, electrical appliances, military industry, petroleum and the like. Background technique [0002] In the prior art, polybenzoxazine resin-based glass fiber cloth laminates are limited in their application due to low toughness, high brittleness, and easy delamination; polybismaleimide resin-based glass fiber cloth laminates also have toughness Small, brittle, and easy to delaminate performance shortcomings. In most cases, various types of epoxy resins are mixed with benzoxazine resins or bismaleimide resins to achieve the purpose of modification, so as to adapt to the preparation of practical in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B37/06B32B37/10B32B27/04B32B27/18B32B27/28B32B17/04C08L79/08C08G73/12
Inventor 李建学唐安斌许自贵
Owner SICHUAN DONGFANG INSULATING MATERIAL
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