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Polyepoxy water-borne epoxy latex for portland cement slurry and preparation method thereof

A water-based epoxy emulsion and multi-epoxy technology, applied in the field of Portland cement slurry materials, can solve the problems of demulsification, affecting the stability of Portland cement slurry, poor compatibility of Portland cement slurry, etc. Improved compressive strength, beneficial stability, excellent emulsifier structure

Inactive Publication Date: 2019-05-28
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, during the hydration and curing process of Portland cement slurry, the cement slurry not only has a certain pH value, but also has a high concentration of ions under specific environmental conditions. In this case, the general epoxy resin emulsion is prone to breakage. emulsion, and some epoxy resin emulsions have poor compatibility with Portland cement slurry, which affects the stability of Portland cement slurry

Method used

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  • Polyepoxy water-borne epoxy latex for portland cement slurry and preparation method thereof
  • Polyepoxy water-borne epoxy latex for portland cement slurry and preparation method thereof

Examples

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Embodiment 1

[0029] The Portland cement slurry of the present embodiment is made from the following raw materials in mass percent: 55% of E-51 epoxy resin, 5% of polyepoxy emulsifier, 40% of deionized water %, the polyepoxy-based emulsifier is made from the following raw materials in mass percent: E-51 epoxy resin 14%, polyethylene glycol (molecular weight is 5000) 60%, methyltetrahydrophthalic anhydride 10%, ethylene glycol Alcohol ether 16%.

[0030] The preparation method of the above-mentioned Portland cement slurry with many epoxy-based water-based epoxy emulsions may further comprise the steps:

[0031] 1) Under mechanical stirring, methyltetrahydrophthalic anhydride, ethylene glycol ether 16% and polyethylene glycol (molecular weight: 5000) were stirred and reacted at 150°C for 2 hours, and then E-51 epoxy resin was added under stirring, Continue to react at 150°C for 2 hours to prepare a multi-epoxy emulsifier;

[0032] 2) Heat E-51 epoxy resin, the polyepoxy-based emulsifier and...

Embodiment 2

[0034] The Portland cement slurry of the present embodiment is made from the following raw materials in mass percent: 41% of E-44 epoxy resin, 15% of polyepoxy emulsifier, and 10% of propylene glycol methyl ether for the Portland cement slurry of the present embodiment. %, deionized water 34%, and the polyepoxy emulsifier is made from the raw material of following mass percent: E-44 epoxy resin 15%, polyethylene glycol (molecular weight is 6000) 75%, methylhexahydro Phthalic anhydride 5%, propylene glycol methyl ether 5%.

[0035] The preparation method of the above-mentioned Portland cement slurry with many epoxy-based water-based epoxy emulsions may further comprise the steps:

[0036] 1) Under mechanical stirring, methyl hexahydrophthalic anhydride, propylene glycol methyl ether and polyethylene glycol (molecular weight: 6000) were stirred and reacted at 155°C for 3h, then continued to add E-44 epoxy resin under stirring, at 155°C Continue to react for 3h to make many epox...

Embodiment 3

[0039] The Portland cement slurry of the present embodiment is made from the following raw materials in mass percent: 49% of E-20 epoxy resin, 12% of polyepoxide emulsifier, and 9% of propylene glycol ether , deionized water 30%, and described polyepoxy emulsifier is made by the raw material of following mass percent: E-20 epoxy resin 28%, polyethylene glycol (molecular weight is 8000) 57%, phthalic anhydride 7%, propylene glycol ether 8%.

[0040] The preparation method of the above-mentioned Portland cement slurry with many epoxy-based water-based epoxy emulsions may further comprise the steps:

[0041] 1) Under mechanical stirring, stir phthalic anhydride, propylene glycol ethyl ether and polyethylene glycol (molecular weight: 8000) at 160°C for 4 hours, then continue to add E-20 epoxy resin under stirring, at 160°C Continue to react for 4h to make many epoxy-based emulsifiers;

[0042] 2) Heat E-20 epoxy resin, the polyepoxy-based emulsifier and propylene glycol ethyl et...

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Abstract

The invention relates to the technical field of portland cement slurry, in particular to polyepoxy water-borne epoxy latex for portland cement slurry and a preparation method thereof. The polyepoxy water-borne epoxy latex for portland cement slurry is prepared from the following raw materials in percentage by mass: 41 to 55 percent of epoxy resin A, 5 to 15 percent of multiple epoxy emulsifiers, 0to 10 percent of cosolvents and 30 to 40 percent of deionized water; the multiple epoxy emulsifiers are prepared from the following raw materials in percentage by mass: 14 to 28 percent of epoxy resin B, 57 to 75 percent of polyethylene glycol, 5 to 10 percent of anhydride and 5 to 16 percent of water-based cosolvents. The prepared water-borne epoxy latex has the advantages that the stability ishigh; in addition, good compatibility is realized with the portland cement slurry; through the crosslinking curing effect and filling effect of partial epoxy groups and the cement hydrates, the pressure-resistant and folding-resistant intensity and the anti-corrosion performance of the portland cement slurry are obviously improved.

Description

technical field [0001] The invention relates to the technical field of Portland cement slurry materials, in particular to a multi-epoxy water-based epoxy emulsion for Portland cement slurry and a preparation method thereof. Background technique [0002] Ordinary Portland cement materials have many durability problems due to their high brittleness and low tensile strength. Under the repeated action of external loads, environments and other factors, cement-based materials gradually crack, and the width of cement cracks after cracking is very large. Difficult to get under control. In particular, Portland cement, as a commonly used cementing material, has a lot of application requirements in the downhole reinforcement engineering of oil and gas field drilling and completion operations. During the operation of strengthening, protecting and supporting oil and gas wells, high temperature and high mineralization will be encountered. These factors will seriously damage and affect th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/32C04B24/28C04B103/61
Inventor 谭伟民胡秀东倪维良狄志刚郁飞史立平刘仲阳
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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