Modified thermosetting ultra-high polymer epoxy resin railroad track elastic bar insulation gauge block

Abstract

The invention relates to a modified thermosetting ultrahigh-molecular epoxy rein screw spike special for a railway, which is good in corrosion resistance and weather resistance and high in strength, wherein the performance of the composite material can conform to that of low-carbon steel (such as strength requirement on a steel workpiece Q235 specified by GB / T700-1988Q235). The modified thermosetting ultrahigh-molecular epoxy resin screw spike comprises the following components by weight percent: 12-18% of modified thermosetting epoxy resin, 4-6% of hyperbranched solidifying cross-linking agent, 60-86% of fibrous reinforcing materials and 5.5-8.5% of powdered reinforcing material additive. The modified thermosetting ultrahigh-molecular epoxy resin screw spike has the advantages that a molecular structure not only contains a large quantity of flexible chain sections to buffer brittleness and hardness of epoxy resin, but also contains an end-capped epoxy group which can participate in curing reaction, and the toughening effect is obvious, so that not only is the bonding strength of a system improved, but also 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 for railway tracks 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 / T700-1988Q235). The elastic bar type III insulating gauge block 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 limited. [0003] There are als...

AI Technical Summary

Problems solved by technology

Due to the chain molecular structure of thermoplastic resin, many molecular chains are combined together by physical action. Due to the limitation of its process, the amount of residual low molecular solvent in the drying process cannot be guaranteed to overflow completely. The arrangement is not uniform, and the residual solvent cannot escape completely, resulting in uneven strength per unit area. There are bubbles in it, which cannot guarantee the consistency of material strength and quality, making this composite material unable to be used in some special high-demand products such as rail fasteners. , automotive gearboxes, pressure vessels, ship plates, armor protection, etc. to replace existing metal materials

[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

Images