Structural flame-retardant high-strength low-heat polymer grouting material for reinforcement

Abstract

The invention relates to a structural flame-retardant high-strength low-heat-release high-polymer grouting material for reinforcement, and belongs to the technical field of polyurethane materials. The structural flame-retardant high-strength low-heat-release high-polymer grouting material for reinforcement is produced from combined polyether polyol and modified isocyanate according to the weight ratio of 100: (100-160), the internal reaction temperature is smaller than or equal to 100 DEG C, the compressive strength is larger than or equal to 60 mPa, the bonding strength is larger than or equal to 3 mPa, the oxygen index is larger than or equal to 28%, the grouting material does not contain halogen and has no influence on water quality, the odor grade (80 DEG C) is smaller than or equal to 3.5, and the service life of the grouting material is prolonged. The fog test is less than or equal to 5mg (the phenomenon that the physical additive flame retardant diffuses to the environment is avoided). Especially, the material does not contain environmental hormone substances such as halogen organic substances, is small in combustion smoke amount, does not release corrosive or irritant halogen hydride gas, does not generate toxic cancerogenic substances such as polybrominated benzoxins and polybrominated dibenzofuran, and avoids long-term influence of the material on the environment.

Description

technical field [0001] The invention relates to a structural flame-retardant high-strength and low-heat-releasing polymer grouting material for reinforcement, which belongs to the technical field of polyurethane materials. Background technique [0002] During the excavation process of coal mine roadway, broken or loose coal rock mass often leads to the occurrence of coal mine accidents such as roof collapse and gangway, which not only seriously endanger the life safety of miners, but also seriously affect the production efficiency of coal mining enterprises. Therefore, in the production process of coal mines, grouting reinforcement is generally required for broken coal and rock masses. There are many types of grouting materials, generally divided into inorganic grouting materials and organic grouting materials. Inorganic materials are widely used in water glass cement two-liquid grouting. The advantages of the material are that the cost is low, the reaction is basically not...

AI Technical Summary

Problems solved by technology

[0004] 1. Additive physical flame retardants mostly contain halogen elements such as chlorine and bromine, but halogen flame retardants may pollute coal, causing acid gas to cause air pollution when burning, or poisoning heavy metal catalysts when used as chemical coal , seriously affecting industrial production;

[0005] 2. Additive physical flame retardants used in rigid polyurethane foams have a small molecular weight and will migrate to the surface of polymer materials over time, reducing the flame retardancy of polymer materials and affecting soil quality and groundwater sources at the same time;

[0006] 3. Additive physical flame retardants do not participate in the structure of polymer materials, and will adversely affect the physical properties such as the strength of polymer materials;

[0009] In addition, compared with AQ / T 1089-2011, AQ / T 1089-2020 Coal Mine Strengthening Polymer Materials for Coal and Rock Mass requires that the internal reaction temperature of the material is reduced from ≤140°C to ≤100°C when the material is solidified. The compressive strength has to be reduced from ≥60mPa to ≥40mPa, and now some coal mine bidding documents still require compressive strength ≥60mPa when the internal reaction temperature requirement is ≤100°C, and there is a lack of materials that meet the requirements of the bidding document on the market

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