Special self-flowing epoxy resin mortar for laying vibration optical cables used for subways and preparation method thereof

Abstract

The invention discloses special self-flowing epoxy resin mortar for laying vibration optical cables used for subways. The special self-flowing epoxy resin mortar comprises a component A and a component B in a ratio of 100: 18 to 100: 26. The component A comprises, in parts by weight, 25-55 parts of phosphorus-containing epoxy resin, 10-40 parts of an active ester curing agent, 20-50 parts of diamine benzoxazine resin and 0.1-1 part of a coupling agent. The component B comprises, in parts by weight, 55 to 70 parts of an imidazole curing agent, 18 to 25 parts of a low-temperature curing accelerator and 5 to 20 parts of a phosphoric acid flame retardant. The imidazole curing agent is selected and has the characteristics of low curing temperature, high curing speed, strong thin layer curing capacity, good curing volume stability and capability of maintaining the characteristics of epoxy resin during curing, e.g., viscosity, reliability and the like of the epoxy resin; and formed slurry hasgood stability, does not bleed and is free of the phenomena of layering and segregation, so after the slurry is coagulated and hardened, all parts can be ensured to be uniform and consistent and bonding force is good.

Description

technical field [0001] The invention relates to the field of epoxy resin compositions, in particular to a special self-flowing epoxy resin mortar for laying subway vibrating optical cables and a preparation method thereof. Background technique [0002] Epoxy resin materials have good corrosion resistance, bonding performance, and low shrinkage. Compared with metal materials, they have the advantages of light weight and high strength. However, due to the chemical structure of epoxy resin itself, its impact toughness, elongation at break and flame retardancy are all poor; Halogen flame-retardant epoxy resins usually use a large amount of solid metal hydroxide flame retardants. Such flame retardants are insoluble in the resin system and cause a high viscosity of the resin system, which limits its application to hand lay-up molding. However, it cannot meet the vacuum infusion molding requirements of large-scale composite materials, such as the manufacture of large-scale wind po...

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Problems solved by technology

[0005] In the process of laying the vibrating optical cable, in order to ensure the effect of data collection, it is necessary not only to ensure the mechanical transmission capacity of the optical cable to the tunnel surface, but also to ensure the fixed life of the vibrating optical cable, and the construction in the tunnel, due to the construction ventilation effect Relatively poor, the temperature is not high, and open flame heating is not allowed, so the existing epoxy resin materials cannot meet the construction requirements

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