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Halogen-free flame-retardant phenolic epoxy glass cloth laminate and preparation method thereof

A phenolic epoxy glass and alkali-free glass cloth technology, applied in glass/slag layered products, chemical instruments and methods, layered products, etc., can solve problems such as loss of thermal stability of the system, and achieve excellent flame retardant effect, Realize the effect of industrialized production and simple preparation process

Inactive Publication Date: 2012-04-11
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, adding direct DOPO to the epoxy system will cause the loss of thermal stability of the system, which should be paid attention to when applying

Method used

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  • Halogen-free flame-retardant phenolic epoxy glass cloth laminate and preparation method thereof
  • Halogen-free flame-retardant phenolic epoxy glass cloth laminate and preparation method thereof
  • Halogen-free flame-retardant phenolic epoxy glass cloth laminate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Mix the glycidoxytrimethoxysilane coupling agent with water at a weight ratio of 1:9, stir and dissolve at room temperature, and use a vertical gluing machine to impregnate the alkali-free glass cloth with the coupling agent solution, The non-alkali glass cloth was impregnated at 40°C, and dried at 80°C to obtain the non-alkali glass cloth treated with the coupling agent.

[0039] (2) Add 864 grams (4 moles) of DOPO and 1432 grams (4 moles) of 4,4'-diphenylmethane bismaleimide (BMI) into the reactor, heat up, stir, and melt at 90°C for reaction After cooling for 0.5 hour, 2251 g of solid product of halogen-free phosphorus-containing nitrogen-containing flame retardant was obtained, denoted as DB, and the yield was 98%.

[0040] (3) At room temperature, 360 grams of thermoplastic novolac epoxy resin, 160 grams of thermosetting phenol formaldehyde resin, 400 grams of halogen-free phosphorus-containing nitrogen-containing flame retardant DB, 80 grams of 4,4'-bis(4-amin...

Embodiment 2

[0042] (1) Mix the γ-aminopropyltrimethoxysilane coupling agent with water at a weight ratio of 1:10, stir and dissolve at room temperature, and use a vertical gluing machine to impregnate the alkali-free glass cloth with the coupling agent solution, The non-alkali glass cloth is impregnated at 50°C, and dried at 90°C to obtain the non-alkali glass cloth treated with the coupling agent.

[0043] (2) Add 864 grams (4 moles) of DOPO and 1432 grams (4 moles) of 4,4'-diphenylmethane bismaleimide (BMI) into the reactor, heat up, stir, and melt at 120°C After cooling for 1.0 hour, 2251 g of a halogen-free, phosphorus- and nitrogen-containing flame retardant was obtained as a solid product, denoted as DB, with a yield of 97%.

[0044](3) At room temperature, mix 240 grams of glycidylamine polyfunctional epoxy resin, 240 grams of bisphenol A epoxy resin, 160 grams of thermosetting phenol formaldehyde resin, 320 grams of thermoplastic o-cresol formaldehyde resin, 900 grams of halogen-f...

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Abstract

The invention relates to a halogen-free flame-retardant phenolic epoxy glass cloth laminate and a preparation method thereof, and the laminate comprises alkali-free glass cloth and matrix resin; wherein the matrix resin comprises the following components: 24 wt%-36 wt% of epoxy resin, 16 wt%-24 wt% of phenolic resin, 5 wt%-10 wt% of aromatic amine curing agents, and 40 wt%-45 wt% of halogen-free phosphorus-containing nitrogen-containing fire retardants. The preparation method comprises the following steps: preparing the halogen-free phosphorus-containing nitrogen-containing fire retardant by Michael addition, proportionally mixing the components of the matrix resin, and performing dipping and hot-pressing of the alkali-free glass cloth to obtain the product. The composite material of the invention has a vertical combustion level of up to UL94 V-0 grade, has excellent flame retardant effect, good electrical and mechanical properties, and is applicable to printed circuit boards and other related electronic and electrical insulating materials or structural materials; the invention has a simple preparation process, low cost, convenient operations, and simple preparation process requirements, and facilitates the realization of industrial production.

Description

technical field [0001] The invention belongs to the field of halogen-free flame-retardant materials and preparation thereof, in particular to a halogen-free flame-retardant phenolic epoxy glass cloth laminate and a preparation method thereof. Background technique [0002] Epoxy resin compositions are widely used in fields such as motor insulation materials and electronic packaging materials due to their excellent properties. However, epoxy resin is a flammable material, and a fire will cause huge economic and property losses. For fire safety, it is usually necessary to add flame retardancy to it. In order to impart flame retardancy to such resins, halides, such as epoxy bromides, are generally used. Although halides have good flame retardant properties, they have been proven to release toxic and harmful hydrogen halides, polybrominated dibenzodioxins and furan gases when burned at high temperatures, which will cause environmental pollution. Therefore, it is very important ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B17/04B32B17/10B32B27/18
Inventor 虞鑫海吴爽樊良子徐亚新李恩
Owner DONGHUA UNIV
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