Fire-proof sealing material of cable channel and preparation method of fire-proof sealing material

Abstract

The invention relates to the field of fire-proof materials, in particular to a fire-proof sealing material of a cable channel and a preparation method and construction method of thefire-proof sealingmaterial. The fire-proof sealing material is prepared from the following raw materials in parts by weight: An A component: 80-160 parts of polyether polyol, 30 parts of polyester polyol, 10 parts of halogen-free flame retardant polyester polyol, 30-50 parts of a microcapsule flame retardant and smoke suppressant, 10-20 parts of an inrumescent flame retardant, 5-10 parts of modified nano compositeparticles, 3-6 parts of a film-forming agent, 8-15 parts of pigments and fillers, 8-15 parts of n-pentane, 1-6 parts of a catalyst, 4-8 parts of foam stabilizer and 1-4 parts of water; and a B component: 130-220 parts of polyarylpolymethylene isocyanate. The fire-proof sealing material has the performance of good fire resistance and flame retardant ability, adhesive force and weather fastness, a halogen foaming agent is not contained, and thus the environment cannot be polluted.

Description

technical field [0001] The invention relates to fireproof materials, in particular to a fireproof sealing material for cable trenches, a preparation method and a construction method thereof. Background technique [0002] With the rapid development of the national economy and the acceleration of urbanization, the use of cables in urban power grids is becoming more and more extensive. In substations, cable trenches are often used for laying cables. Cable trenches require cables to pass through holes during cable laying. . The way of laying the cable trench is easy to bring a series of problems: fire caused by the heating of the cable itself, small animals entering the cable trench through the hole and causing a short circuit to cause a fire, and once the fire occurs, it will spread along the gap around the hole in the cable trench. Therefore, the holes in the cable trench need to be sealed, and the holes also need to be treated with fireproofing to prevent the fire from sprea...

AI Technical Summary

Problems solved by technology

The way of laying the cable trench is easy to bring a series of problems: fire caused by the heating of the cable itself, small animals entering the cable trench through the hole and causing a short circuit to cause a fire, and once the fire occurs, it will spread along the gap around the hole in the cable trench. Therefore, the holes in the cable trench need to be sealed, and the holes also need to be fireproofed to prevent the fire from spreading through the holes

At present, fireproofing mud or fire-blocking modules, fire-blocking bags, and fire-blocking plates are usually used in cable trenches. However, fire-proofing mud needs to be heated before construction to make it soft and cannot be fully filled, and fire-blocking modules, etc. will appear It cannot fully meet the difficulty of the hole size, and needs to use organic stoppers to further block

With the development of the industry, the birth of some epoxy resin, silicone glue, and polyurethane sealing materials has improved the defects and disadvantages of such products, but these products mostly use halogen as foaming agent, which produces gas that destroys the atmosphere and causes environmental pollution. , some EU countries have banned the application of halogen flame retardants in production and life; for polyurethane sealing materials, their flame retardant performance is mostly achieved by adding liquid flame retardants, but in order to meet the flame retardant requirements, a large amount of liquid flame retardants are added The agent will affect the physical properties of the plugging material, resulting in a decline in the quality of the plugging material

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