A kind of fast-curing flame-retardant epoxy resin and preparation method thereof

Abstract

The invention discloses rapid cured flame retardation epoxy resin. The rapid cured flame retardation epoxy resin is prepared from epoxy resin, an aluminum hydroxide fire retardant subjected to surface treatment, color paste, a curing agent and a promoter. The invention also discloses a preparation method of the rapid cured flame retardation epoxy resin. Through the novel curing agent, the epoxy resin is fast cured and molded. Through modification of the epoxy resin, excellent integrated performances are obtained. The rapid cured flame retardation epoxy resin provides technical support for a resin base as a carbon fiber composite material so that the carbon fiber composite material can be conveniently used in new energy automobile lightweighting.

Description

technical field

[0001] The invention relates to epoxy resins, in particular to a fast-curing flame-retardant epoxy resin and a preparation method thereof. Background technique

[0002] In today's increasingly stringent requirements on material properties, the rapid development and wide application of resin matrix composites largely benefit from the development of matrix resins such as epoxy resins. As the most commonly used matrix resin for composite materials, epoxy resin can withstand various molding processes such as vacuum-assisted molding, RTM (resin die-casting molding), and compression molding of composite materials.

[0003] Vacuum-assisted molding requires low resin viscosity, slow curing speed, and low production efficiency. However, RTM requires advanced equipment and high dimensional accuracy, and the mechanical properties of die-cast products are unstable and the scrap rate is high. The development of compression molding can greatly shorten the production time...

Examples

Embodiment 1

[0018] A fast-curing flame-retardant epoxy resin in this embodiment consists of the following components: 500kg epoxy resin 331, 200kg surface-treated aluminum hydroxide flame retardant, 20kg color paste, 4kg curing agent and 2kg accelerator agent.

[0019] The curing agent is a diamine curing agent prepared from polyethylene glycol dihalide (polyethylene glycol 1000 dichloride) and azide derivatives.

[0020] The preparation method of the flame retardant epoxy resin of rapid solidification provided by the invention comprises the following steps:

[0021] 1) Surface treatment of aluminum hydroxide flame retardant with interfacial coupling agent: dissolve 5kg of interfacial coupling agent KH550 in 1000L of ethanol, then dissolve 500kg of aluminum hydroxide flame retardant in the interfacial coupling agent solution, After stirring evenly, the ethanol solvent is distilled off to obtain a surface-treated aluminum hydroxide flame retardant;

[0022] 2) Add 200kg of surface-treate...

Embodiment 2

[0025] A fast-curing flame-retardant epoxy resin in this embodiment consists of the following components: 500kg epoxy resin 331, 200kg surface-treated aluminum hydroxide flame retardant, 20kg color paste, 4kg curing agent and 2kg accelerator agent.

[0026] The curing agent is a diamine curing agent prepared from polyethylene glycol dihalide (polyethylene glycol 1000 dibromide) and azide derivatives.

[0027] The preparation method of the above-mentioned fast-curing flame-retardant epoxy resin is the same as that of Example 1.

[0028] The epoxy resin in this embodiment is below 140°C, cured in 5 minutes, the storage period of the resin below °C is more than 30 days, flame retardant at room temperature, and the normal bending strength of the epoxy resin cast body after curing is 45MPa.

Embodiment 3

[0030] A fast-curing flame-retardant epoxy resin in this embodiment consists of the following components: 500kg epoxy resin 331, 200kg surface-treated aluminum hydroxide flame retardant, 20kg color paste, 4kg curing agent and 2kg accelerator agent.

[0031] The curing agent is a diamine curing agent prepared from polyethylene glycol dihalide (polyethylene glycol 2000 dichloride) and azide derivatives.

[0032] The preparation method of the above-mentioned fast-curing flame-retardant epoxy resin is the same as that of Example 1.

[0033] The epoxy resin in this embodiment is below 140°C, cured in 5 minutes, the storage period of the resin below °C is more than 30 days, flame retardant at room temperature, and the normal bending strength of the epoxy resin cast body after curing is 60MPa.

technical field

[0001] The invention relates to epoxy resins, in particular to a fast-curing flame-retardant epoxy resin and a preparation method thereof. Background technique

[0002] In today's increasingly stringent requirements on material properties, the rapid development and wide application of resin matrix composites largely benefit from the development of matrix resins such as epoxy resins. As the most commonly used matrix resin for composite materials, epoxy resin can withstand various molding processes such as vacuum-assisted molding, RTM (resin die-casting molding), and compression molding of composite materials.

[0003] Vacuum-assisted molding requires low resin viscosity, slow curing speed, and low production efficiency. However, RTM requires advanced equipment and high dimensional accuracy, and the mechanical properties of die-cast products are unstable and the scrap rate is high. The development of compression molding can greatly shorten the production time...

Examples

Embodiment 1

[0018] A fast-curing flame-retardant epoxy resin in this embodiment consists of the following components: 500kg epoxy resin 331, 200kg surface-treated aluminum hydroxide flame retardant, 20kg color paste, 4kg curing agent and 2kg accelerator agent.

[0019] The curing agent is a diamine curing agent prepared from polyethylene glycol dihalide (polyethylene glycol 1000 dichloride) and azide derivatives.

[0020] The preparation method of the flame retardant epoxy resin of rapid solidification provided by the invention comprises the following steps:

[0021] 1) Surface treatment of aluminum hydroxide flame retardant with interfacial coupling agent: dissolve 5kg of interfacial coupling agent KH550 in 1000L of ethanol, then dissolve 500kg of aluminum hydroxide flame retardant in the interfacial coupling agent solution, After stirring evenly, the ethanol solvent is distilled off to obtain a surface-treated aluminum hydroxide flame retardant;

[0022] 2) Add 200kg of surface-treate...

Embodiment 2

[0025] A fast-curing flame-retardant epoxy resin in this embodiment consists of the following components: 500kg epoxy resin 331, 200kg surface-treated aluminum hydroxide flame retardant, 20kg color paste, 4kg curing agent and 2kg accelerator agent.

[0026] The curing agent is a diamine curing agent prepared from polyethylene glycol dihalide (polyethylene glycol 1000 dibromide) and azide derivatives.

[0027] The preparation method of the above-mentioned fast-curing flame-retardant epoxy resin is the same as that of Example 1.

[0028] The epoxy resin in this embodiment is below 140°C, cured in 5 minutes, the storage period of the resin below °C is more than 30 days, flame retardant at room temperature, and the normal bending strength of the epoxy resin cast body after curing is 45MPa.

Embodiment 3

[0030] A fast-curing flame-retardant epoxy resin in this embodiment consists of the following components: 500kg epoxy resin 331, 200kg surface-treated aluminum hydroxide flame retardant, 20kg color paste, 4kg curing agent and 2kg accelerator agent.

[0031] The curing agent is a diamine curing agent prepared from polyethylene glycol dihalide (polyethylene glycol 2000 dichloride) and azide derivatives.

[0032] The preparation method of the above-mentioned fast-curing flame-retardant epoxy resin is the same as that of Example 1.

[0033] The epoxy resin in this embodiment is below 140°C, cured in 5 minutes, the storage period of the resin below °C is more than 30 days, flame retardant at room temperature, and the normal bending strength of the epoxy resin cast body after curing is 60MPa.