Preparation method of plugging composite material polyurethane elastomer used in coal mines

Abstract

The invention relates to a preparation method of plugging composite material polyurethane elastomer used in coal mines, and the method comprises the following steps: taking modified nano titanium dioxide, polyether polyalcohol, toluene diisocyanate and the like as raw materials; synthesizing respectively component A yellow transparent liquid product and component B white opaque liquid product in a reaction kettle test jar under the state of vacuum, heating and stirring; stirring and blending with the ratio of 4:6 when in use; spraying or brushing the plugged object; and solidifying after drying. The invention has the advantages of good plugging effect, good cohesive force, high rigidity, high temperature and low temperature resistance, aging resistance, good elasticity, shock absorption, acid resistance, oil resistance, water resistance, anti-static ability, tight padding, good insulation and good compactness; the invention can rapidly plug leaking water, leaking gas, leaking oil and cracks; the invention has rapid drying speed, after plugging by synthesization of component A and component B, drying and solidification can be completed in 120 min, and the thickness of the solidification layer can reach 4mm; the preparation method has short process flow and reasonable ratio, and can be applicable to building, petroleum and chemical industries.

Description

technical field [0001] The invention relates to a preparation method of a polyurethane elastomer, a plugging composite material used in coal mines, and belongs to the technical field of synthesis methods and applications of organic + inorganic compound elastomer composite materials. Background technique [0002] In coal mines, coal spontaneous combustion, gas leakage and other disasters seriously threaten production and personal safety. Among the many factors that cause spontaneous combustion and gas accidents, air leakage is one of the most important factors. [0003] At present, the plugging methods for underground air leakage in coal mines mainly include: cement mortar spraying, cement fly ash spraying, gypsum spraying, polyurethane foam spraying, etc. These methods all require spraying equipment, and spraying is prone to uneven coating and secondary cracks. Affect the plugging effect; Among them, polyurethane foam spraying can be pre-filled with high-pressure gas in a tw...

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Problems solved by technology

[0003] At present, the plugging methods for underground air leakage in coal mines mainly include: cement mortar spraying, cement fly ash spraying, gypsum spraying, polyurethane foam spraying, etc. These methods all require spraying equipment, and spraying is prone to uneven coating and secondary cracks. Affect the plugging effect; Among them, polyurethane foam spraying can be pre-filled with high-pressure gas in a two-component tank, but the curing time cannot be adjusted, the adhesion is poor, and the price is high. It is not suitable for large-scale construction. It can only be used for local construction and rapid sealing. Some organic materials mostly contain solvents, which do not meet the requirements of environmental protection, and some plugging materials have complicated preparation process, serious pollution, and poor plugging effect, all of which have some technical deficiencies

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