Water glass-acrylate compound gel water shut-off agent and preparation method thereof

A technology of acrylate and composite gel, which is applied in the field of water glass-acrylate composite gel and its preparation, can solve the problems of poor durability, weak strength, high price and the like, and achieves a reasonable formula, simple operation and environment-friendly Effect

Active Publication Date: 2019-06-28
BEIJING MUNICIPAL CONSTR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problems of poor durability of single cheap water glass grouting mate

Method used

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  • Water glass-acrylate compound gel water shut-off agent and preparation method thereof
  • Water glass-acrylate compound gel water shut-off agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1

[0027] Step a: Under stirring in an ice-water bath, slowly add sodium hydroxide (0.2mol / L) and water glass (Baume 40°) to acrylic acid. The neutralization degree of acrylic acid is 60 mol%. The molar ratio is 0:1);

[0028] Step b: Stir the neutralized solution in step A at room temperature for 10 hours, add 0.05wt% N,N'-methylenebisacrylamide and 2wt% triethanolamine respectively, and stir uniformly to prepare A of acrylate gel water shutoff agent Slurry

[0029] Step c: Dissolve 0.2wt% potassium persulfate and 0.5wt% copper sulfate in distilled water to prepare B slurry of acrylate gel water shutoff agent;

[0030] Step d: Pour the A slurry prepared in step b and the B slurry prepared in step c into the separatory funnel, and open the valve at the same time to quickly mix the A and B slurries. Preferably, the volume ratio of A and B is 1:1 . Use the inverted cup method to record the gel setting time, and test the absorption rate and compressive strength.

Example Embodiment

[0031] Example 2-5

[0032] Step a: Under stirring in an ice water bath, slowly add metal hydroxide (0.2mol / L) and different mass fractions of water glass (Baume 40°) to the acrylate and neutralize it to a degree of neutralization of 60 mol%. The molar ratio of water glass to acrylic acid in Example 2 is 0.06:1, Example 3 is 0.18:1, Example 4 is 0.36:1, and Example 5 is 0.6:1);

[0033] Step b: Stir the neutralized solution in step A at room temperature for 10 hours, add 0.05wt% N,N'-methylenebisacrylamide and 2-wt% triethanolamine respectively, and stir evenly to prepare a water glass-acrylate composite gel A slurry of glue blocking agent;

[0034] Step c: Dissolve 0.2wt% potassium persulfate and 0.5wt% copper sulfate in distilled water to prepare B slurry of water glass-acrylate composite gel water shutoff agent;

[0035] Step d: Pour the A slurry prepared in step b and the B slurry prepared in step c into the separatory funnel, and open the valve at the same time to quickly mix th...

Example Embodiment

[0036] Example 6-8

[0037] Step a: Under stirring in an ice-water bath, slowly add metal hydroxide (0.1-1mol / L) and water glass (40° Baume) to the acrylate and neutralize it to a degree of neutralization of 40-80mol%. The molar ratio of glass to acrylic acid is 0.18:1);

[0038] Step b: Stir the neutralized solution in step A at room temperature for 10 hours, add different mass fractions of ethylene glycol diacrylate and 3wt% tetramethylethylenediamine, and stir evenly to prepare a water glass-acrylate composite gel plug A slurry of water agent (wherein the crosslinking agent content in Example 6 is 0.025%, Example 7 is 0.075%, and Example 8 is 0.1%);

[0039] Step c: Dissolve 0.1wt% initiator and 0.2wt% auxiliary in distilled water to prepare B slurry of water glass-acrylate composite gel water shutoff agent;

[0040] Step d: Pour the A slurry prepared in step b and the B slurry prepared in step c into the separatory funnel, and open the valve at the same time to quickly mix the A ...

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Abstract

The invention provides a water glass-acrylate compound gel water shut-off agent and a preparation method thereof, and belongs to the technical field of municipal and construction engineering new materials. The polyfunctional compound gel water shut-off agent is prepared by melting and combining an acrylate grouting material with water glass. The water glass has relatively good water solubility, apore structure cannot generate in a sol gelling process, the strength of gel can be improved; a Si-O-Si network structure is formed by using the water glass as silicon precursor, acrylate is polymerized under the effect of crosslinker, accelerant and initiator, and the compound gel water shut-off agent has relatively high advantages in the strength aspect, water retention, shrinkage and omission prevention and relatively strong shut-off performance. The water glass-acrylate compound gel water shut-off agent can be widely applied to water proofing, leaking stoppage, permeation resistance, rockstratum or soil layer reinforcing and strengthening of rock soil and civil engineering, and has an important meaning to resource, energy and capital saving.

Description

technical field [0001] The invention relates to a water glass-acrylate composite gel and a preparation method thereof. It belongs to the category of new materials for municipal and construction projects, and the field of fine chemical technology. Background technique [0002] Chemical grouting technology is to pour organic, inorganic or organic-inorganic composite material solution into the formation or gap under a certain pressure to make it diffuse, gel or solidify, so as to strengthen the formation and repair cracks. With the rapid development of chemical grouting materials, the scale of grouting technology application projects is also increasing, involving almost all geotechnical and civil engineering fields. Mainly used in dam foundation reinforcement and anti-seepage, mine and tunnel excavation, subway excavation, building deviation correction, concrete defect repair, etc. [0003] The water glass grouting material means that the water glass forms a gel under the act...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F222/38C08F222/14C08F222/20C08F2/44C08K3/34
Inventor 孔恒郭飞张丽丽赵晨阳张新全张肇潜张旭光徐霖杨伏川郑青姜瑜高胜雷夏宝坤董凯林雪冰乔国刚王凯丽郝亮孙博通
Owner BEIJING MUNICIPAL CONSTR
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