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Method for preparing high-strength water-absorbing expansive polymer plugging agent

A water-swelling, polymer technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of low strength and low water-swelling rate, and achieve high water-absorbing rate, large expansion coefficient, and low curing shrinkage. Effect

Inactive Publication Date: 2018-01-26
仇颖莹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a method for preparing a high-strength water-swellable polymer plugging agent in view of the defects of low strength and low water-swelling rate of current plugging agents

Method used

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Examples

Experimental program
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Effect test

example 1

[0023] Mix acrylic acid, 25% mass fraction of acrylamide aqueous solution, acrylonitrile and deionized water in a beaker at a volume ratio of 1:2:1:2 and stir for 8 minutes to obtain a liquid prepolymer. Weigh 40g of bentonite and 20g of montmorillonite The soil was ground for 10 minutes and passed through a 200-mesh sieve to collect the sieved powder. Add 6 g of sodium fluoride, 3 g of sodium hydroxide and 8 mL of deionized water to the sieved powder and mix and stir for 12 minutes. After stirring, the modified sieved powder was obtained. Mix bisphenol A epoxy resin and phenolic resin with a ratio of 3:2 and stir for 4 minutes to obtain a mixed resin. Add 30 mL of absolute ethanol to 60 g of the mixed resin, mix and dissolve at 50 ° C for 1 hour, and obtain a mixed product after completely dissolving. According to the mass ratio of 2:1, glass fiber and natural resin were mixed and ground for 10 minutes to obtain modified glass fiber. In terms of parts by weight, 30 parts of li...

example 2

[0025]Mix acrylic acid, 25% mass fraction of acrylamide aqueous solution, acrylonitrile and deionized water in a beaker at a volume ratio of 1:2:1:2 and stir for 9 minutes to obtain a liquid prepolymer. Weigh 50g of bentonite and 30g of montmorillonite The soil was ground for 15 minutes and passed through a 200-mesh sieve to collect the sieved powder. Add 7 g of sodium fluoride, 4 g of sodium hydroxide and 9 mL of deionized water to the sieved powder and mix and stir for 15 minutes. After stirring, the modified sieved powder was obtained. Mix bisphenol A epoxy resin and phenolic resin with a ratio of 3:2 and stir for 5 minutes to obtain a mixed resin, add 40 mL of absolute ethanol to 70 g of the mixed resin, mix and dissolve at 60 ° C for 1.5 hours, and obtain a mixed product after completely dissolving , according to the mass ratio of 2:1, glass fiber and natural resin were mixed and ground for 11 minutes to obtain modified glass fiber. Sieve powder, 5 parts of modified glass...

example 3

[0027] Mix acrylic acid, 25% mass fraction of acrylamide aqueous solution, acrylonitrile and deionized water in a beaker at a volume ratio of 1:2:1:2 and stir for 10 minutes to obtain a liquid prepolymer. Weigh 60g of bentonite and 40g of montmorillonite The soil was ground for 20 minutes and passed through a 200-mesh sieve to collect the sieved powder. Add 8 g of sodium fluoride, 5 g of sodium hydroxide and 10 mL of deionized water to the sieved powder and mix and stir for 18 minutes. After stirring, the modified sieved powder was obtained. Mix bisphenol A epoxy resin and phenolic resin with a ratio of 3:2 and stir for 6 minutes to obtain a mixed resin. Add 50 mL of absolute ethanol to 80 g of the mixed resin, mix and dissolve at 70 ° C for 2 hours, and obtain a mixed product after completely dissolving. According to the mass ratio of 2:1, glass fiber and natural resin were mixed and ground for 12 minutes to obtain modified glass fiber. In parts by weight, 50 parts of liquid p...

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PUM

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Abstract

The invention discloses a method for preparing a high-strength water-absorbing expansive polymer plugging agent and belongs to the technical field of preparation of plugging agents. By virtue of a liquid polymer composed of acrylic acid, acrylamide and an acrylonitrile monomer, the acrylamide has high water absorbing capacity of the amide group, so that the water-absorbing expansion rate of the polymer plugging agent is improved; due to the addition of a bisphenol A epoxy resin and a phenolic resin, the bisphenol A epoxy resin and the phenolic resin are modified by using a modified glass fiberflexibilizer, so that the strength and viscosity of the polymer plugging agent are improved; by utilizing modification of sodium fluoride and sodium hydroxide on the bentonite and montmorillonoid inorganic matters, the modified bentonite and montmorillonoid have high expansion factor, and by utilizing sodium persulfate initiation, calcium chloride solidification, cross-linking of the N,N-methylenebis acrylamide and adhesion of polyvinylidene fluoride, the calcium chloride is induced to carry out a cross-linking reaction by the sodium persulfate. Moreover, the plugging agent can absorb water to expand in the reaction process, the strength and water-absorbing expansion rate of the polymer plugging agent are improved, and the polymer plugging agent has wide application prospects.

Description

technical field [0001] The invention discloses a preparation method of a high-strength water-absorbing-swellable polymer plugging agent, which belongs to the technical field of plugging agent preparation. Background technique [0002] The plugging agent is a kind of fast setting and hardening, and after reacting with water, it expands rapidly to block the cracks and achieve the purpose of water stop; the plugging agent has a slightly expanding hydraulic material, and the plugging agent can be used after mixing with water. Surface construction can also be used to plug leaks with water, and the effect is peculiar. The plugging agent can be widely used in the construction and plugging of houses, underground, underwater, quicksand tunnels, etc. Leakage repair etc. [0003] In the houses we live in, some leaks often occur because they have been used for a long time, and some are due to sloppy construction. After the emergence of this phenomenon, it is a housing problem that mak...

Claims

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Application Information

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IPC IPC(8): C08L51/08C08L51/00C08K13/06C08K9/08C08K9/02C08K3/34C08K7/14C08K3/30C08K3/16C08F291/12C08F220/56C08F220/06C08F220/44C08F222/38C09K8/42
Inventor 仇颖莹杨立军陈莉莉
Owner 仇颖莹
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