Halogen-free flame-retardant epoxy resin composition and application thereof

A technology of epoxy resin and composition, applied in the field of halogen-free flame retardant epoxy resin composition, can solve the problems of insufficient heat resistance, decreased mechanical properties, poor product dielectric properties, etc.

Active Publication Date: 2020-02-07
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, flame retardant epoxy resins are mostly used to introduce halogen atoms (chlorine, bromine, etc.) It is restricted in more and more fields, so the flame retardant technology of epoxy resin is gradually developing towards high efficiency, high flame retardancy, low smoke and low toxicity
[0003] Among them, phosphorus-containing flame retardants have the advantages of high flame-retardant efficiency and no toxic and harmful substances are released during combustion, and have become a research hotspot for flame-retardant epoxy resins. At present, the halogen-free flame retardants used in epoxy resins in industry are mainly DOPO Phosphorus-based flame retardants such as polyphosphazene (HPCTP), aluminum diethyl hypophosphite (ADP) and other ph

Method used

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  • Halogen-free flame-retardant epoxy resin composition and application thereof
  • Halogen-free flame-retardant epoxy resin composition and application thereof
  • Halogen-free flame-retardant epoxy resin composition and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Weigh 100 parts by mass of bisphenol A epoxy resin, then add 10 parts of flame retardant EDPO according to the formula, mix at 150°C for 3-5 minutes, and after it becomes transparent, add 30 parts of curing agent DDS, 0.2 parts of 2- Methylimidazole was stirred at 150°C for 5 minutes and placed in a vacuum drying oven to remove air bubbles. After being transparent, it was poured into a standard mold while it was still hot, cured at 130°C for 2 hours, and cured at 160°C for 2 hours. After demoulding, a light yellow flame-retardant transparent epoxy was obtained. Resin material.

Embodiment 2

[0040] Weigh 100 parts by mass of DCPD novolac epoxy resin, then add 10 parts of flame retardant EDPO according to the formula, mix at 150°C for 3-5 minutes, and after it becomes transparent, add 30 parts of curing agent DDS and 0.2 parts of 2-formaldehyde For imidazole, stir at 150°C for 5 minutes, put it in a vacuum drying oven to remove bubbles and make it transparent, pour it into a standard mold while it is hot, and then cure it at 130°C for 2 hours, and then cure it at 160°C for 2 hours. After demoulding, a light yellow flame-retardant transparent epoxy is obtained Resin material.

Embodiment 3

[0042] Weigh 100 parts by mass of bisphenol A epoxy resin, then add 10 parts of flame retardant PDPO according to the formula and heat up and mix for 3-5 minutes. After it becomes transparent, add 30 parts of curing agent DDS and 0.2 parts of 2-methylimidazole , Stir at 150°C for 5 minutes, put it in a vacuum drying oven to remove bubbles and make it transparent, pour it into a standard mold while it is hot, and then cure it at 130°C for 2 hours, and then cure it at 160°C for 2 hours. After demoulding, a light yellow flame-retardant transparent epoxy resin material is obtained. .

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Abstract

The invention relates to the field of high molecular materials, in particular to a halogen-free flame-retardant epoxy resin composition and application thereof. The composition comprises 100 parts ofepoxy resin, a halogen-free composite flame retardant provided with diphenylphosphine oxide flame-retardant groups, 5-15 parts of a main flame retardant, 0-10 parts of an auxiliary flame retardant, 2-30 parts of a curing agent and 0-1 part of a curing accelerating crosslinking agent. The composition further comprises a mixture of at least two of reinforced fibers, a flexibilizer, a filler, a silane coupling agent and a solvent. The composite flame retardant containing the diphenylphosphine oxide groups is high in flame-retarding efficiency and small in adding amount and has excellent compatibility and dispersity with the epoxy resin; and in the curing process, intermolecular dispersion with the epoxy resin can be realized, and the original transparent state of the epoxy resin is maintained. The finally cured flame-retardant resin composition has the advantages of low cost, high transparency, low water absorption rate, high glass conversion temperature, high thermal stability, low dielectric constant and dielectric loss, high flame retarding and the like.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a halogen-free flame-retardant epoxy resin composition and its application. Background technique [0002] Epoxy resin is characterized by active epoxy groups in its molecular chain. The cured epoxy resin has excellent electrical properties, good mechanical properties and excellent chemical stability. It is widely used in aviation, Coatings, construction, adhesives, electronic copper clad laminates and many other fields. Because epoxy resin produces a lot of black smoke during combustion, and the oxygen index is around 20, which has a large flame spread hazard, so it is generally necessary to carry out flame retardant modification. At present, flame retardant epoxy resins are mostly used to introduce halogen atoms (chlorine, bromine, etc.) It is restricted in more and more fields, so the flame retardant technology of epoxy resin is gradually developing towards high efficiency, h...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08L71/12C08L85/02C08K5/5397C08K5/5313C08K5/3492C08K5/5399C08K3/36C08K13/02
CPCC08K3/36C08K5/34924C08K5/5313C08K5/5397C08K5/5399C08L63/00C08L2201/02C08L2201/10C08L2201/22C08L2205/025C08L2205/03C08L85/02C08L71/12C08K13/02
Inventor 武军王忠卫侯计金魏振乾曾冲段好东于青
Owner SHANDONG UNIV OF SCI & TECH
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