The invention belongs to the technical field of preparation of prepreg, and particularly relates to a flame-retardant and heat-resistant epoxy resin for self-adhesive prepreg. The resin for the prepreg consists of an epoxy resin mixture component A and a curing agent mixture component B. The epoxy resin mixture component A accounts for 50-80 parts by weight of the resin, and the curing agent mixture component B accounts for 10-40 parts by weight of the resin. The prepreg is prepared by a hot melt adhesive dipping reinforcing material of a composition; a composite material is formed by the prepreg. The viscosity of the prepreg is moderate, and the processability is good; the storage time at the normal temperature is 3 months. The prepreg can be cured completely within 2 hours at the temperature of 135 DEG C. The glass-transition temperature of the cured composite material is 180-210 DEG C; heat resistance and flame retardance of the composite material are good. The resin for the hot melting prepreg provided by the invention has been toughened and modified, the self-adhesive property of the prepreg is good, honeycombs can be adhered directly, adhesive films are not required, the process can be simplified, and the weight can be reduced.

Flame-retardant and heat-resistant epoxy resin for self-adhesive prepreg

The present invention relates to a method for preparing a high toughness epoxy resin matrix by using a heat fusion method In the prior art, a viscosity of the high toughness thermosetting epoxy resin system prepared by the traditional method is excessively increased so as to cause substantially-increased difficulty of the subsequent processing process Based on the problem in the prior art, after a main body epoxy resin is mixed, a curing agent is added under a suitable condition, a small particle size thermoplastic powder material is mixed to the main body epoxy resin at a suitable temperature, and grinding is adopted to uniformly mix the resin so as to complete uniformity Compared to the traditional toughening method, the method of the present invention has the following characteristics that: the minimum viscosity of the resin matrix can be substantially reduced, placement of the corresponding prepreg can be improved, and manufacturability of the prepreg can be improved With the present invention, manufacturability and placement of the heat fusion method high toughness epoxy resin prepreg are improved, and the prepreg can be applicable for high toughness epoxy resin matrix composite material structures applied in aerospace, high toughness epoxy resin matrix composite material structures applied in warships, weapons and other defense industries, and various civil high toughness composite materials

Method for preparing high toughness epoxy resin matrix by using heat fusion method

A flow controllable epoxy resin prepreg and a preparation method thereof are disclosed. The preparation method comprises the following steps: individually preparing an epoxy resin component, a flow control component, and a curing component, adding the epoxy resin component and the curing component into the flow control component to prepare a flow controllable epoxy resin system with a viscosity more than 4 Pa.s, and finally compounding the system with an enhancing material so as to obtain the flow controllable expoxy resin prepreg; wherein the epoxy resin component can be single epoxy resin or a composition of multiple epoxy resins and accounts for 10 to 90% of the total weight of the system; the flow control component is a prepolymer or mixer of an epoxy resin modifier and epoxy resin and accounts for 5 to 60% of the total weight of the system, and the curing component is composed a single curing agent or a mixture of multiple curing agents or curing agents and promoters, and accounts for 2 to 30% of the total weight of the system. Through the provided flow controllable epoxy resin prepreg, the control modes of feeding pressurization and zero rubber absorption in the autoclave moulding engineering can be achieved, and thus the product quality is improved.

Flow controllable epoxy resin prepreg and preparation method thereof

Interlayer toughening carbon fiber-metal layer plywood

The invention discloses a composite honeycomb sandwich board and a preparation method of the composite honeycomb sandwich board. The composite honeycomb sandwich board comprises an aluminum honeycomb sandwich and an epoxy resin reinforcing material surface layer composited on the surface of one or two sides of the aluminum honeycomb sandwich, the epoxy resin reinforcing material surface layer is a solidifying product of a hot melting type epoxy resin prepreg, the hot melting type epoxy resin prepreg comprises a reinforcing material and an epoxy resin composition, the epoxy resin composition comprises an epoxy resin, a latent solidifying agent, an accelerant, a coupling agent, optional flexibilizer and optional filler, and the coupling agent comprises a silane coupling agent containing an amino. The provided composite honeycomb sandwich board avoids using an extra solvent type adhesive, and is further environmentally friendly; meanwhile, the bonding strength between the aluminum honeycomb sandwich and the epoxy resin reinforcing material surface layer is improved, and the composite honeycomb sandwich board does not delaminate easily.

Composite honeycomb sandwich board and preparation method thereof

The invention belongs to the technical field of manufacturing of prepreg, and particularly relates to an epoxy resin for prepreg and a preparation method thereof. The resin for prepreg consists of an epoxy resin mixture component A and a maleated rosin environment-friendly curing agent mixture component B, wherein the epoxy resin mixture component A accounts for 50-80 parts of the weight of the resin; and the environment-friendly curing agent mixture component B accounts for 10-40 parts of the weight of the resin. A maleated rosin curing agent resin for prepreg produced with the method can be fully cured within 2 hours at the temperature of 125 DEG C, and has the advantages of short curing period, low curing temperature and reduction in production cost. The prepreg can be prepared with a hot melting method or a solution method, has appropriate viscosity and high manufacturability, and can be stored for one month at the normal temperature. The prepreg is suitable for preparing a composite material with an autoclave method or a die pressing method; and the toughness, flame retardance and electrical property of the composite material are high. Honeycombs can be bonded directly, adhesive films are not required, the process can be simplified, weight is reduced, and environment-friendly prepreg can be prepared by pre-soaking plant fibers.

Epoxy resin for prepreg and preparation method thereof

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Epoxy resin for prepreg and preparation method thereof