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Halogen-free flame-retardant epoxy resin system for prepregs, and preparation method thereof

An epoxy resin system and epoxy resin technology, applied in the field of polymer materials, can solve the problems of destroying electrical properties, heat resistance and reliability of use, flame retardants cannot participate in the curing reaction of resin systems, and limited application range. Achieve uniform stability, high toughness, and good heat resistance

Pending Publication Date: 2020-09-15
HUACHANG POLYMER EAST CHINA UNIV OFSCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent ZL98808244 provides a method of adding phosphate ester or similar to epoxy resin. The scope of application of this method is limited. Usually, the phosphate ester structure in the phosphate ester compound is easy to cause hydrolysis and generate free phosphoric acid, which will significantly damage the electrical properties and durability. Heat resistance and reliability, and the flame retardant itself cannot participate in the curing reaction of the resin system

Method used

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  • Halogen-free flame-retardant epoxy resin system for prepregs, and preparation method thereof
  • Halogen-free flame-retardant epoxy resin system for prepregs, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Weigh 10 parts of bisphenol A liquid epoxy resin 128 and 4 parts of phenoxy resin in a reactor, heat up to 150°C under the protection of nitrogen, keep stirring for 4 hours, until the mixed liquid becomes clear, discharge, and cool to room temperature to obtain component a; then weigh 8 parts of bisphenol A liquid epoxy resin 128 and preheat to 50-70°C, add 2 parts of dicyandiamide curing agent EQ-14 and 2 parts of urea derivative accelerator UR-D, disperse evenly with a high-speed disperser, and then grind it in a three-roll mill for 3 to 6 times to obtain component b; then mix 75 parts of phenolic epoxy resin 638S, 10 parts of phosphorus nitrogen flame retardant FR- Add 01 to the double planetary mixer in turn, raise the temperature to 150°C, and stir at a revolution speed of 20-40 rpm and a dispersion speed of 750-1500 rpm for 1-3 hours to obtain component c; Add 1 part of component a and 16 parts of solid bisphenol A resin 901 to component c, stir in the container a...

Embodiment 2

[0062] Weigh 12 parts of bisphenol A liquid epoxy resin 128 and 2 parts of phenoxy resin in a reactor, heat up to 150°C under the protection of nitrogen, keep stirring for 4 hours, until the mixed liquid becomes clear, discharge, and cool to room temperature to obtain component a; then weigh 12 parts of bisphenol A liquid epoxy resin 128 and preheat to 50-70°C, add 4 parts of dicyandiamide curing agent 100S and 4 parts of urea derivative accelerator UR- 2T, disperse evenly with a high-speed disperser, and then grind it in a three-roller mill for 3 to 6 times to obtain component b; then mix 50 parts of phenolic epoxy resin 638S and 19 parts of phosphorus nitrogen flame retardant FR-01 in sequence Add it into a double planetary mixer, raise the temperature to 150°C, and stir at a revolution speed of 20-40 rpm and a dispersion speed of 750-1500 rpm for 1-3 hours to obtain component c; Add 1 part of component a and 10 parts of solid bisphenol A resin 902, stir in the container at ...

Embodiment 3

[0065] Weigh 15 parts of bisphenol A liquid epoxy resin 128 and 5 parts of polyvinyl alcohol phenolic resin in a reactor, heat up to 150°C under nitrogen protection, keep stirring for 4 hours, until the mixed liquid becomes clear and discharge , cooled to room temperature to obtain component a; then weigh 15 parts of bisphenol A liquid epoxy resin 128 and preheat it to 50-70°C, add 4 parts of dicyandiamide curing agent 1400F and 2 parts of urea derivative accelerator UR-41, disperse evenly with a high-speed disperser, and then grind it in a three-roll mill for 3 to 6 times to obtain component b; then mix 34 parts of phenolic epoxy resin 638S, 15 parts of phosphorus nitrogen flame retardant FR- 02 Add it to the double planetary mixer in sequence, raise the temperature to 150°C, and stir at a revolution speed of 20-40 rpm and a dispersion speed of 750-1500 rpm for 1-3 hours to obtain component c; Add 1 part of component a and 30 parts of solid bisphenol A resin 902 to component ...

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Abstract

The invention relates to a halogen-free flame-retardant epoxy resin system for prepregs, and a preparation method thereof. The halogen-free flame-retardant epoxy resin system for prepregs contains a bisphenol A epoxy resin, a phenolic epoxy resin, a solid epoxy resin, a thermoplastic resin, a curing agent, an accelerator and a halogen-free flame retardant. The product has the characteristics of moderate viscosity, high toughness, good heat resistance, high mechanical strength and the like, and the preparation method disclosed by the invention is simple and convenient, uniform in resin mixing and stable in quality.

Description

technical field [0001] The invention belongs to the field of polymer materials, in particular to a halogen-free flame-retardant single-component epoxy resin system and a preparation method thereof, more specifically to a halogen-free flame-retardant epoxy resin system for carbon fiber prepreg and its Preparation. Background technique [0002] At present, trams, subways and light rails are the main modes of urban transportation in large cities in my country. Common thermosetting resins commonly used in rail transit mainly include three common resins: unsaturated polyester resin, phenolic resin and epoxy resin. The resin system used in rail transit is different from the ordinary thermosetting resin system, which has high requirements for flame retardancy. Nowadays, environmental protection is imminent, and the calls for halogen-free flame retardant systems are getting higher and higher. [0003] Generally speaking, there are three types of flame retardant systems for thermo...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08L71/12C08L61/14C08J5/24
CPCC08J5/24C08J2363/00C08J2463/00C08J2471/12C08J2461/14
Inventor 冯云龙施佳盛陈建辉邢铭菲李恒黄锐付建辉缪鹏程童恩彬刘坐镇吕晓平
Owner HUACHANG POLYMER EAST CHINA UNIV OFSCI & TECH
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