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Modified thermoset ultrahigh-molecular epoxy resin electric-strip insulation gauge block for railway track

A technology of epoxy resin and ultra-high polymer, which is applied in the direction of fixing rails, tracks, roads, etc., can solve the problems that the resin content cannot be accurately controlled, the strength requirements cannot be met, and the quality cannot be guaranteed, so as to avoid linear expansion coefficient, The effect of uniform density and excellent mechanical properties

Inactive Publication Date: 2013-03-06
HANGZHOU DAGU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The epoxy resin hand lay-up process currently used for composite materials, due to the backward process, the resin content cannot be accurately controlled, and the quality cannot be guaranteed. In addition, it uses ordinary epoxy resin and curing crosslinking agent, which cannot meet the requirements of replacing metal materials. strength requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: Modified thermosetting ultra-high molecular weight epoxy resin railroad track elastic bar insulation gauge block, it is characterized in that the modified thermosetting epoxy resin that contains 12-18 weight part, the hyperbranched of 4-6 weight part Curing cross-linking agent, 60-86% by weight of fibrous reinforcement material, 5.5-8.5% by weight of powder reinforcement material additive.

[0014] The modified thermosetting epoxy resin contains 14-16% (14% or 14.8% or 15% or 15.5% or 16%) of bisphenol A epoxy resin and 0.15-0.25% (0.15% or 0.2% or 0.25%) by weight of polyether-modified methyltetrahydrophthalic anhydride toughener; the 14-16% by weight of bisphenol A epoxy resin is composed of E-51 epoxy resin and E-44 ring Oxygen resin is formed in a ratio of 2:1; the hyperbranched imidazole amidated derivative curing agent is made of trimethylolpropane 15-20% (15% or 16% or 17% or 18% or 19% or 20%), 2,2-dimethylolpropionic acid 15-21% (15% or 16% or 17...

Embodiment 2

[0018] Embodiment 2: On the basis of embodiment 1, the modified thermosetting epoxy resin containing 15% by weight, the hyperbranched curing crosslinking agent of 5% by weight, the fibrous reinforcing material of 73% by weight, 7% by weight powder reinforcement additives.

Embodiment 3

[0019] Embodiment 3: on the basis of embodiment 1 or 2, modified thermosetting ultra-high molecular weight epoxy resin railway track uses elastic bar insulation gauge block preparation method, the modified thermosetting epoxy resin of 12-18% by weight and 5.5-8.5% by weight of powder reinforcement material additives are mixed and ground into a uniform slurry, and 4-6% by weight of hyperbranched curing crosslinking agent is added in proportion to stir evenly, and then a quantitative amount of 60-86% by weight of The fiber reinforced material is made into a thick paste or paste prepreg with a viscosity of 50000-100000Pa.S, and then the prepreg is placed in a heated mold, and a pressure of more than 1000KN is applied after exhausting, and the temperature is controlled at 165- After secondary curing at 175°C for 3-6 minutes, the finished modified thermosetting ultra-high polymer epoxy resin type III insulating gauge block for elastic rails for railway tracks is obtained. The impre...

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PUM

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Abstract

The invention relates to a modified thermoset ultrahigh-molecular epoxy resin electric-strip insulation gauge block for a railway track, which is high in corrosion resistance and weather resistance as well as intensity, and can achieve performance like that of low carbon steel (such as a Q235 steel workpiece the intensity of which can meet the requirement stated in GB / T700-1988Q235). The gauge block comprises the following raw materials in percentage by weight: 12% to 18% of modified thermoset epoxy resin, 4% to 6% of hyperbranched curing cross-linking agent, 60% to 86% of fibrous reinforcing materials and 5.5% to 8.5% of power reinforced material additives. The gauge block provided by the invention has the advantages that a molecular structure contains not only a great amount of flexible segments for relieving crisp and rigidity of the epoxy resin, but also end-capped epoxy groups which can participate in curing reaction, so that a toughening effect is obvious, the bonding strength of a system is improved, and the compression strength and the shearing strength of the materials are improved greatly.

Description

technical field [0001] The invention relates to a modified thermosetting ultra-high polymer epoxy resin railway track with good corrosion resistance, good weather resistance, high strength, and performance reaching low carbon steel (such as the strength requirements of Q235 steel workpieces specified in GB / T700-1988 Q235). The utility model relates to insulating a gauge block with elastic strips, which belongs to the field of manufacturing modified polymer plates. Background technique [0002] At present, the raw materials used for the baffle seats of type I and II railway clips are metal carbon steel, nylon 6 (polyamide 6) and modified nylon 66 (modified polyamide 66). Not resistant to rust, rusted workpieces quickly lose their proper performance; nylon 6 baffle seat and modified nylon 66 due to their structural characteristics (anti-fatigue strength loss and low temperature difference, etc.) Embrittlement generally occurs in arid areas, and its service life is greatly lim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/02C08L71/00C08K13/04C08K7/14C08K7/06C08K7/10C08K5/1539C08K5/06C08K5/09C08K5/1575C08K5/3445E01B9/66
Inventor 高原
Owner HANGZHOU DAGU NEW MATERIAL
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