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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 material and expensive price and weak strength of single acrylate grouting material

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

Embodiment 1

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

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

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

[0030] Step d: Pour the A slurry prepared in step b and the B slurry prepared in step c into the separating funnel respectively, and open the valve at the same time to quickly mix the A and B slurries, preferably the volume ratio of the A and B liquids is 1:1 . The gel coagulation time was recor...

Embodiment 2-5

[0032] Step a: Under stirring in an ice-water bath, metal hydroxide (0.2mol / L) and water glass (Baume degree 40°) of different mass fractions are slowly added dropwise to the acrylate to neutralize to a degree of 60mol%, wherein In embodiment 2, the mol ratio of water glass and acrylic acid is 0.06:1, embodiment 3 is 0.18:1, embodiment 4 is 0.36:1, embodiment 5 is 0.6:1);

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

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

[0035] Step d: Pour the A slurry prepared in step b and the B slurry prepared in step c into the separating funnel respectively, and open the valve at the same time to quic...

Embodiment 6-8

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

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

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

[0040] Step d: Pour the A slurry prepared in step b and the B slurry prepared in step c into the separating funnel respectively, and open the valve at the same tim...

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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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