Preparation method of flame-retardant stable polyurethane reinforcing material

A reinforcement material, polyurethane technology, applied in the field of reinforcement materials, can solve problems such as poor flame retardancy and poor mechanical properties, and achieve the effects of improving mechanical properties, improving dispersion, and expanding the scope of application

Inactive Publication Date: 2018-08-03
赵建平
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  • Abstract
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Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the problems of poor mechanical properties and poor flame retardancy of polyurethane reinforced materials, a preparation method of flame-retardant and stable polyurethane reinforced materials is provided

Method used

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  • Preparation method of flame-retardant stable polyurethane reinforcing material

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Embodiment Construction

[0017] According to the mass ratio of 1:15, stir and mix peat and 1mol / L sodium hydroxide solution and place it in a mortar for grinding and dispersing for 2-3 hours to obtain a grinding slurry and place it under 200-300W for ultrasonic dispersion for 10-15 minutes to obtain a dispersion Place it in a water bath at 75-80°C for 3-5 hours, let it cool down to room temperature, then centrifuge at 2500-3000r / min for 10-15 minutes, collect the supernatant, add glacial acetic acid dropwise to adjust the pH to 2.5, and let it stand After 6-8 hours, vacuum freeze-dry and collect the dry particles, modified particles; weigh 45-50 parts of Baume degree 15 silica sol, 25-30 parts of deionized water, 10-15 parts of modified The granules and 25-30 parts by mass fraction of 25% ethanol solution are placed in a three-necked flask, then heated in a water bath at 65-75°C for 20-24 hours, and left to cool to room temperature to obtain a gel solution; in parts by weight, respectively Weigh 25 to...

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Abstract

The invention relates to a preparation method of a flame-retardant stable polyurethane reinforcing material, and belongs to the technical field of reinforcing materials. According to the technical scheme of the invention, peat is taken as a raw material, a modifying material is extracted, and the surface of silica sol is subjected to grafting modification in order to realize surface grafting of nano-silica in a non-organic solvent. The surface of the silica sol can be further connected with various functional groups through grafting modification of a dispersible modifying material. Formed geldispersoid is effectively and organically dispersed inside a polyurethane material to form a three-dimensional crosslinked netlike structure, so that the mechanical performance of the polyurethane reinforcing material is improved. According to the technical scheme, prepared porous glass micro powder is coated with dispersed and modified gel, then the gel burns, and generated silicon dioxide ash forms a coating layer after high-temperature burning. Under the bonding and combustion-supporting actions of glass flow at a high temperature, an eutectic reaction is performed between the silicon dioxide and glass micro powder to generate a dense protection layer, so that the aim of resisting flame and fire is fulfilled.

Description

technical field [0001] The invention relates to a preparation method of a flame-retardant and stable polyurethane reinforcement material, which belongs to the technical field of reinforcement materials. Background technique [0002] Polyurethane grouting reinforcement materials are mostly composed of two components of black material and white material, which are composed of main agent and various auxiliary agents. Chain agent, flame retardant, foam stabilizer, etc. After the polyurethane grouting reinforcement material slurry is cured, its mechanism of strengthening the matrix structure can be roughly attributed to the following points, including gap filling and strengthening, cementing the crack surface, network support and reducing the crack formation rate. (1) The role of gap filling and reinforcement. After the polyurethane grout is injected into the rock structure through the grouting equipment, under the action of the grouting pressure, the grout is filled into the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08K9/10C08K7/28C08K9/04C08K3/36
CPCC08G18/3271C08G18/48C08G18/6688C08K3/36C08K7/28C08K9/04C08K9/10C08K2201/011
Inventor 赵建平蒋益
Owner 赵建平
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