Wind erosion-resistant modified polyurethane sand-fixing soil-repairing agent and preparation method

A technology for repairing soil and polyurethane, which is applied in the direction of soil protection, soil conditioning materials, chemical instruments and methods, etc., can solve problems such as large-scale damage, insufficient strength and toughness, and poor wind erosion resistance, so as to prolong the service life and improve Strength and toughness, effect of improving wind erosion resistance

Active Publication Date: 2019-08-23
湖南凯迪工程科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the shortcomings of current chemical sand-fixing materials, such as insufficient strength and toughness, poor wind erosion resistance, and easy to cause large-scale damage, the first purpose of the present invention is to propose a method for preparing a wind-erosion-resistant modified polyurethane sand-fixing and repairing soil agent

Method used

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  • Wind erosion-resistant modified polyurethane sand-fixing soil-repairing agent and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The sand-fixing and repairing soil agent is composed of A component of lignin nitrate modified by diatomite and B component composed of linear polyurethane prepolymer; a preparation method of a wind erosion-resistant modified polyurethane sand-fixing and repairing soil agent consists of the following steps :

[0037] (a) Preparation of component A: take water and polyethylene glycol according to the percentage by weight of 0.05:1, add polyethylene glycol into water, stir evenly to obtain a lignin derivative solvent, and set aside;

[0038] (b) first disperse 25kg of diatomaceous earth in 105kg of lignin derivative solvent prepared in step (a), then add 25kg of lignin nitrate therein, and stir at room temperature for 1.5h to obtain component A;

[0039] (c) Preparation of component B: Add polyethylene glycol with a low molecular weight of less than 1000 to the diisocyanate, stir and mix evenly, pass in nitrogen gas, react at 70°C for 4 hours, add dimethylol propionic aci...

Embodiment 2

[0042] The sand-fixing and repairing soil agent is composed of A component of lignin nitrate modified by diatomite and B component composed of linear polyurethane prepolymer; a preparation method of a wind erosion-resistant modified polyurethane sand-fixing and repairing soil agent consists of the following steps :

[0043] (a) Preparation of component A: take water and polyethylene glycol according to the percentage by weight of 0.15:1, add polyethylene glycol into water, stir evenly to obtain a lignin derivative solvent, and set aside;

[0044] (b) First disperse 25kg of diatomaceous earth in 120kg of lignin derivative solvent prepared in step (a), then add 25kg of lignin nitrate to it, and stir at room temperature for 1.5h to obtain component A;

[0045] (c) Preparation of component B: Add polyethylene glycol with a low molecular weight of less than 1000 to the diisocyanate, stir and mix evenly, pass in nitrogen gas, react at 70°C for 4 hours, add dimethylol propionic acid ...

Embodiment 3

[0048] The sand-fixing and repairing soil agent is composed of A component of lignin nitrate modified by diatomite and B component composed of linear polyurethane prepolymer; a preparation method of a wind erosion-resistant modified polyurethane sand-fixing and repairing soil agent consists of the following steps :

[0049] (a) Preparation of component A: take water and polyethylene glycol according to the percentage by weight of 0.10:1, add polyethylene glycol into water, stir evenly to obtain a lignin derivative solvent, and set aside;

[0050] (b) First disperse 45kg of diatomaceous earth in 120kg of lignin derivative solvent prepared in step (a), then add 25kg of lignin nitrate therein, and stir at room temperature for 1.5h to obtain component A;

[0051] (c) Preparation of component B: Add polyethylene glycol with a low molecular weight of less than 1000 to the diisocyanate, stir and mix evenly, pass in nitrogen gas, react at 70°C for 4 hours, add dimethylol propionic aci...

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Abstract

The invention relates to the technical field of sand-fixing soil-repairing agents, in particular to a wind erosion-resistant modified polyurethane sand-fixing soil-repairing agent and a preparation method. The sand-fixing soil-repairing agent is composed of a component A comprising diatomite modified lignin nitrate and a component B comprising a linear polyurethane pre-polymer. The component A isprepared by taking water and polyethylene glycol according to the weight percentage, adding polyethylene glycol into water, performing even stirring to obtain a lignin derivative solvent, dispersing diatomite into the lignin derivative solvent, adding lignin nitrate, and performing stirring at room temperature for 1-2 h. The component B is prepared by adding an oligomer diol into diisocyanate, performing even stirring and mixing, introducing an inert gas, and adding a hydrophilic chain extender and a non-hydrophilic chain extender for carrying out a reaction. When the sand-fixing soil-repairing agent is used, the two components A and B are thoroughly mixed and sprayed onto a flowing sand surface to carry out a reaction, and thus a polyurethane material for sand-fixing and repairing with high strength and high toughness is formed.

Description

technical field [0001] The invention relates to the technical field of sand-fixing and repairing soil agents, in particular to a wind erosion-resistant modified polyurethane sand-fixing and repairing soil agent and a preparation method thereof. Background technique [0002] Land desertification is one of the biggest environmental and socio-economic problems facing the world today, and it is also the largest and most harmful type of desertification in my country. To curb the increasingly rampant trend of desertification, it is necessary to carry out sand fixation. Currently, there are three main methods of sand fixation: engineering sand fixation, plant (biological) sand fixation and chemical sand fixation. [0003] Chemical sand fixation is to spray organic or inorganic chemical bonding materials on the flowing sand to form a covering layer on the surface of the moving sand, or penetrate into the surface sand, and bond the loose sand particles to form a consolidated layer w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/32C09K17/40E02D3/12C09K105/00
CPCC09K17/32C09K17/40C09K2105/00E02D3/12
Inventor 陈庆昝航
Owner 湖南凯迪工程科技有限公司
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