Halogen-free flame-retardant epoxy prepreg and composite material thereof
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A composite material and prepreg technology, which is applied in the field of halogen-free epoxy resin composition and prepreg and composite materials containing the resin, can solve the problem that the flame retardant level cannot meet the flame retardant requirements of the rail transit field, and achieve The effect of good viscosity, good mechanical properties and good manufacturability
Pending Publication Date: 2020-03-20
成都鲁晨新材料科技有限公司
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Problems solved by technology
At present, most of the flame-retardant epoxy composite materials in the public information generally pass the UL94 V0 level, which can meet the requirements of electronic products such as printed circuit boards, but this flame-retardant level can no longer meet the flame-retardant requirements of the rail transit field.
Method used
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Embodiment 1
[0042] (1) Preparation of flame retardant resin
[0043] Mix 5 parts of DICY and 10 parts of NPEL-128 uniformly to prepare component B, mix 5 parts of U-24 and 10 parts of NPEL-128 uniformly to obtain component C; mix 5 parts of NPEL-128 and 55 parts of NPPN -638S, 20 parts of SEN-6065, 5 parts of PVF were dissolved at 150°C and mixed evenly, cooled to 70-80°C, then 20 parts of Doher601R, 20 parts of Doher6002A and 50 parts of aluminum hydroxide were added, stirred and mixed evenly to obtain Component A: add B and C components to A component, mix well to get flame retardant epoxy resin.
[0044] (2) Prepreg preparation
[0045] The prepreg is prepared by a one-step method, the resin is glued at 70°C, the fiber is 200g / m2 carbon fiber fabric, and the resin content is 45%.
[0046] (3) Composite material preparation
[0047]Cut the prepreg into 1000mm×1000mm, lay it up, make a vacuum bag, vacuum pressure ≥ 0.085MPa, put the prepreg into the autoclave, press 0.6MPa, cure at 14...
Embodiment 2～9
[0049] The preparation methods of Examples 2-9 are similar to those of Example 1, only the composition and dosage of the resin formulation are changed, and the matrix is shown in Table 1.
[0050] Table 1
[0051]
[0052]
[0053] Flame retardant performance is tested according to DIN 5510-2 standard; bending strength is tested according to ASTM D7264 standard, and shear strength is tested according to ASTM D2344 standard.
[0054] The flame retardant prepreg prepared in the above examples has good process performance, and the composite materials prepared by using the flame retardant epoxy prepreg all have excellent flame retardant performance and good mechanical strength, which can meet the requirements of fire prevention in rail transit, etc. demanding areas.
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Abstract
The invention discloses a halogen-free flame-retardant epoxy prepreg and a composite material thereof. The halogen-free flame-retardant epoxy prepreg comprises a fiber reinforcement and halogen-free flame-retardant epoxy resin, wherein the mass content of the fiber reinforcement in the prepreg is 50-70%, and the mass content of the halogen-free flame-retardant epoxy resin in the prepreg is 50-70%.The halogen-free flame-retardant epoxy resin comprises the following components in parts by mass: 100 parts of epoxy resin, 5-30 parts of a liquid phosphorus-containing flame retardant, 10-40 parts of a powdery phosphorus-containing flame retardant, 20-100 parts of an inorganic flame retardant, 3-6 parts of a curing agent, 1-5 parts of an accelerant and 1-10 parts of thermoplastic resin, whereinthe epoxy resin is composed of bisphenol type epoxy resin, phenolic aldehyde type epoxy resin and phosphorus-containing epoxy resin. The halogen-free flame-retardant epoxy prepreg is prepared by adopting a one-step method which is simple and efficient, and has good process performance and super-long storage stability. A composite material product prepared from the halogen-free flame-retardant prepreg disclosed by the invention has excellent flame-retardant and mechanical properties, and can meet the fireproof performance requirement on the composite material in the field of rail transits.
Description
technical field [0001] The invention belongs to the technical field of high-performance fiber composite materials, and relates to a halogen-free epoxy resin composition with excellent flame-retardant performance, and prepregs and composite materials containing the resin. Background technique [0002] Fiber composite materials are composed of high-performance fibers such as carbon fibers, glass fibers, basalt fibers, and aramid fibers and epoxy resins or other resins. They have the characteristics of high specific strength and specific modulus, good manufacturability, and relatively low cost. It is used in the fields of aerospace, energy transportation, and electrical insulation, and has made important contributions to the lightweight of aircraft components, the multi-selectivity of engineering fields, and the high reliability of electrical equipment. [0003] With the requirements for modern rail trains such as light weight, energy saving and emission reduction, and operatio...
Claims
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Application Information
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