The invention provides epoxy compositions and a preparation method thereof, in particular to the epoxy compositions suitable for liquid molding. The compositions are prepared from the following components in parts by mass:100 parts of epoxy resin compositions and 40-55 parts of curing agent compositions, wherein the epoxy resin compositions comprise tetrafunctional epoxy resin, trifunctional epoxy resin and difunctional epoxy resin, and the ratio of the tetrafunctional epoxy resin to the trifunctional epoxy resin to the difunctional epoxy resin in parts by mass is (20-50):(20-50):(20-50); the curing agent compositions comprise an aromatic amine curing agent and an accelerant, and the ratio of the aromatic amine curing agent to the accelerant in parts by mass is (95-100):(0-5). The epoxy compositions provided by the invention are liquid, the mixing viscosity is low, and the operability is good.

Epoxy compositions suitable for liquid molding of composite material and preparation method thereof

The invention relates to a high temperature-resistant resin matrix and a preparation method thereof, which belong to the field of a high-molecular material. The high temperature-resistant resin matrixcomprises the following raw materials in parts by mass: 65-80 parts of multi-functional epoxy resin, 8-15 parts of a flexibilizer, 10-25 parts of bisphenol-A epoxy resin, 15-30 parts of a curing agent, and 0.1-8 parts of a curing accelerator. The high temperature-resistant resin matrix designed by a formula has excellent manufacturability, a composite material prepared by the resin matrix has excellent performances of high heat resistance, high intensity, high impact strength, and high corrosion resistance, and the preparation method of the resin can avoid the risk of implosion of the multi-functional epoxy resin under high temperature.

High temperature-resistant resin matrix and preparation method thereof

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High temperature-resistant resin matrix and preparation method thereof