Low-heat polyurethane grouting reinforcement material

Abstract

The invention relates to a low-heat polyurethane grouting reinforcement material. The reinforcement material comprises a component A and a component B, wherein the component A contains 60-90 parts byweight of polymeric MDI; the component B contains, by weight, 10-40 parts of polyether polyol, 10-20 parts of polymer polyol, 0.01-6 parts of a catalyst, 1-10 parts of a flame retardant and 10-20 parts of an assistant; and at least one of the component A and the component B further contains vegetable fat or modified vegetable fat. The above formula contains a certain amount of the vegetable fat ormodified vegetable fat, so the reinforcement material can quickly absorb heat released by a reaction of the polymeric MDI and the polyether polyol, and participates in some of chemical reactions, thereby the reaction of the whole system is mild, and the reaction heat is slowly aggregated, and the overall reaction temperature rise is significantly lower than that of existing polyurethane groutingmaterials; and the addition of the vegetable fat and modified vegetable fat has no negative influences on the application properties and the comprehensive mechanical properties of the polyurethane grouting materials.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a low-heat two-component polyurethane grouting reinforcement material. Background technique [0002] In the past ten years, with the full use of large-scale fully mechanized mining equipment in coal mines in my country, a large number of high-yield and efficient large-scale mines have been rapidly constructed. In terms of urban subways, first- and second-tier cities in China are rapidly developing rail transit. In terms of regional water diversion and water diversion, a large number of large-scale water diversion projects have been implemented, such as South-to-North Water Diversion, Northeast Water Diversion from Songsong, Lanzhou Water Source Construction, Xinjiang Yihe and Ehe River Water Diversion, Shanxi Yellow River Diversion, Qinghai Dajihuang Water Diversion, Shaanxi Red Diversion Jishi and other projects, and the rapid construction of long-distance...

AI Technical Summary

Problems solved by technology

However, the existing products of this type basically use the addition of relatively large amounts of non-active chlorine-containing, bromine-containing, and phosphorus-containing flame retardants.

Although it does have a certain flame retardant effect, once such products are burned or carbonized at high temperature, they will immediately produce a large amount of deadly toxic and harmful smoke and dust gas, which will directly poison the carbon monoxide adsorbent in the coal mine underground rescue device. Lead to the failure of underground rescue, resulting in irreversible casualties

Third, when the existing grouting reinforcement materials containing such flame retardants are applied to underground mining of coal mines, once the flame retardant components are mixed into the coal, the coal will cause The poisoning and failure of the catalyst filler in the fertilizer plant directly affects the production of fertilizers

[0004] To sum up, the existing two-component polyurethane grouting reinforcement materials mainly have the following problems: (1) high heat production, high reaction temperature, easy to cause spontaneous combustion or even fire; (2) easy to produce toxic and harmful gases after fire at high temperature, making the (3) This type of reinforcement material is mixed into the coal body, causing the catalyst used in fertilizer production to fail when the coal body is used as fuel in a fertilizer plant, affecting the production of fertilizers

In view of the above problems, the popularization and application of existing polyurethane grouting reinforcement materials in engineering is greatly limited

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