Halogen-free flame-retardant epoxy resin and preparation method thereof

Abstract

The invention discloses a halogen-free flame-retardant epoxy resin. The halogen-free flame-retardant epoxy resin is prepared from the following components in parts by weight: 100 to 150 parts of epoxyresin, 15 to 30 parts of a curing agent, 5 to 8 parts of a dispersant, 20 to 30 parts of hydroxylated multi-walled carbon nano-tubes and 5 to 10 parts of a halogen-free flame retardant. The halogen-free flame-retardant epoxy resin does not contain a halogen flame retardant; the flame retarding effect is good and uniform; the oxygen index can reach 30 percent or above.

Description

technical field [0001] The invention relates to the field of epoxy resins, in particular to a halogen-free flame-retardant epoxy resin. Background technique [0002] Cured epoxy resins are widely used in the fields of coatings, adhesives, fiber-reinforced composite materials, and insulating materials for electronic and electrical equipment due to their advantages such as high mechanical strength, insulation, good thermal stability, and chemical corrosion resistance. However, epoxy resin is a flammable material, and it will produce a lot of smoke and toxic and harmful gases after burning, which cannot meet the application fields with high requirements for flame retardancy, thus greatly limiting the application of epoxy resin. [0003] In the prior art, flame retardants are usually added to improve the flame retardant effect of epoxy resins. Halogenated flame retardants have good flame retardant effects, but due to their strong toxicity, their use has been banned. [0004] Am...

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Problems solved by technology

However, in this patent, aluminum hydroxide cannot be well dispersed in the epoxy resin, and the flame retardant effect provided is limited. The above-mentioned problems are problems that need to be solved urgently in this field

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