The invention discloses a preparation method of emulsion for coating a high-temperature resistant and flame-retardant glass fiber sleeve. The raw materials in parts by mass are prepared as follows: 70-90 parts of tetrafunctional glycidyl amine epoxy resin, 10-30 parts of brominated epoxy resin, 80-100 parts of a curing agent, 0.5-2 parts of an accelerant, 10-20 parts of a flexibilizer and 0.05-0.10 part of polymethylsiloxane. The preparation method comprises the following steps in sequence: S1, mixing tetrafunctional glycidyl amine epoxy resin and brominated epoxy resin in a forced mixer uniformly to obtain a mixed solution; S2, heating the mixed solution obtained in step S1 to 40-70 DEG C, adding the curing agent, the accelerator, the flexibilizer and polymethylsiloxane to the mixed solution, performing mixing in the forced mixer at a mixing speed of 60-80 r/min for 40-60 min, and then keeping the temperature for standing to obtain the product. The method has the advantages of being simple, easy to operate, safe and environmentally friendly, facilitates industrialization and has remarkable economic benefits.

Preparation method of emulsion for coating high-temperature-resistant and flame-retardant glass fiber sleeve

The invention relates to the technical field of high-temperature superconducting coils, and in particular to a high-temperature superconducting coil and a curing method thereof. The invention providesa high-temperature superconducting coil. The high-temperature superconducting coil comprises a plurality of cake-type high-temperature superconducting coils and an epoxy resin layer, all the cake-type high-temperature superconducting coils are aligned and arranged to form a coil body; and an epoxy resin layer is fixedly arranged on the periphery of the coil body, and no epoxy resin is filled between the adjacent high-temperature superconducting tapes in the coil body. The invention provides a high-temperature superconducting coil, and effectively solves the technical problem of performance degradation of a high-temperature superconducting coil prepared by a traditional epoxy resin curing method.

High-temperature superconducting coil and curing method thereof

The invention relates to a high heat resistant epoxy resin and a preparation method thereof. The high heat resistant epoxy resin is obtained by curing of epoxy terminated modified oligomeric polyethersulfone and bisphenol A epoxy resin. By introducing the polyether sulfone structure with high heat resistance and good flexibility into the main chain of epoxy resin, the heat resistance and flexibility of the epoxy resin are greatly improved, and the obtained epoxy resin has the characteristics of low viscosity, good heat resistance and high flexibility, and can be widely applied to the field ofcarbon fiber composite materials with high heat resistance and high flexibility requirements.

High heat resistant epoxy resin and preparation method thereof

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 epoxy resin for a prepreg tape and a preparation method of the epoxy resin and belongs to the field of polymer materials. Raw materials including 15-50 parts by mass of bisphenol A epoxy resin and 20-60 parts by mass of a flexibilizer are poured into a mixing kettle for mixing, and a uniform liquid mixture I is obtained and defoamed in vacuum for 0.5-1.5 h; the mixture iscooled to 100 DEG C or lower, and resin is discharged by a pressure feeder into a clean and dry resin barrel for standby application; the mixture obtained in the last step, 10-50 parts of multifunctional epoxy resin and 15-50 parts of phenolic aldehyde epoxy resin are poured into the mixing kettle for mixing, and a uniform liquid mixture II is obtained, defoamed in vacuum for 0.5-1.5 h and cooledto 70 DEG C or lower; 2-90 parts of a curing agent and 0.1-3 parts of an accelerator are added to the mixing kettle for mixing, the speed of stirring paddles is 500-800 rpm, mixing is performed at 65-85 DEG C for 10-40 min, vacuum defoaming is performed, and a uniform liquid mixture III is obtained; the prepared epoxy resin composition flows into trays through the pressure feeder for subpackaging,naturally cooled at room temperature and packaged into a finished product.

Epoxy resin for prepreg tape and preparation method of epoxy resin

The invention relates to a bisphenol A epoxy resin and a preparation method thereof, which belong to the field of polymer materials. The bisphenol A epoxy resin comprises the following components: 50to 70 parts by mass of bisphenol A epoxy resin, 15 to 25 parts by mass of a curing agent, and 10 to 20 parts by mass of thermoplastic polyether sulfone. The method comprises the following steps: adding the bisphenol A epoxy resin and thermoplastic polyether sulfone with a formula amount into an organic solvent with the appropriate amount for being mixed, wherein the temperature of a mixed solutionis controlled between 60 DEG C and 75 DEG C, stirring the materials until epoxy resin and thermoplastic polyether sulfone are completely dissolved, adding the aromatic amine curing agent with the formula amount to the above mixed solution, and stirring a mixture until a system is uniformly mixed, stirring the materials for 2.5-3h, pouring the uniformly stirred sample into an opened container andtransferring the material to a vacuum oven, vacuumizing at room temperature until the solvent is completely removed, and obtaining the modified bisphenol A epoxy resin. According to the invention, a bi-continuous phase epoxy resin blend is obtained through relatively simple process conditions, and the prepared bisphenol A epoxy resin modified material has good processability, mechanical properties, heat resistance, and toughness.

Bisphenol A epoxy resin 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

The invention relates to the field of high polymer materials, in particular to an epoxy resin composition and a preparation method of a prepreg thereof. Polyfunctional group epoxy resin and liquid bisphenol A epoxy resin are adopted as matrix resin, DDS and MCA10 are adopted as a compound curing agent, a BF3-monoethylamine complex is adopted as an accelerant, flexibilizer thermoplastic resin and athixotropic agent TS720 are adopted as modifiers and are mixed in a mixing tank to obtain a low-temperature curing heat-resisting epoxy resin composition, and the prepreg is prepared through a hot melting method. The prepared epoxy resin composition and the prepreg are applicable to a hand molding method, vacuum bag pressing, autoclaves and other technologies and are applied to the fields of automobiles, track traffic, unmanned aerial vehicles, sports leisure, composite mold manufacturing and the like.

Epoxy resin composition and preparation method of prepreg thereof

The invention relates to resin for a wind turbine blade presoaked material and a production method of the resin, and belongs to the field of high-molecular materials. The resin comprises, by weight, 60-80 parts of bisphenol A epoxy resin, 10-25 parts of toughened modified epoxy resin, 2-20 parts of curing agents and 1-15 parts of thixotropic agents. The preparation method includes the steps: stirring the bisphenol A epoxy resin and the toughened modified epoxy resin at the temperature of 100 DEG C by weight in a formula for 15-25 minutes, performing vacuum pumping in the stirring process to obtain solution, and taking the solution as a component A; adding the thixotropic agents into the component A by weight in a formula, stirring mixture for 5-10 minutes to solution, and taking the solution as a component B; adding the curing agents by weight in a formula when the component B is cooled to reach the temperature of 65-75 DEG C, stirring mixture for 5-10min, opening a vacuum system, andstirring the mixture for 15-2omin to obtain the epoxy resin for the wind turbine blade presoaked material.

Resin for wind turbine blade presoaked material and preparation method of resin

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