Thermoplastic elastic material for oil well cement and preparation method thereof
A technology of thermoplastic elasticity and oil well cement, applied in the field of materials, can solve the problems of failure to prevent fundamentally, poor dispersion of cement slurry, brittleness of cement stone and easy shrinkage, etc., to ensure long-term stable development, enhance elasticity and toughness, Effect of improving hardness and brittleness
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[0047] The present invention provides a preparation method of the thermoplastic elastic material for oil well cement according to any one of the above technical solutions, comprising:
[0048] A) mixing thermoplastic elastic material, reactive solvent and oil-soluble initiator, heating and stirring to obtain a first solution;
[0049] mixing water-soluble monomer, water, pH adjuster and water-soluble initiator to obtain a second solution;
[0050] B) mixing the first solution and the second solution, heating and stirring, to obtain a reaction product; after the reaction product is granulated, a thermoplastic elastic material for oil well cement is obtained.
[0051] The present invention has already clearly described the above-mentioned components and proportions, and will not be repeated here.
[0052] In the present invention, the thermoplastic elastic material, the reactive solvent and the oil-soluble initiator are mixed, heated and stirred to obtain the first solution.
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Embodiment 1
[0066] Weigh 200 parts of A171 and 100 parts of TPU powder, place them in a four-necked flask with mechanical stirring, a thermometer, and a condenser, heat up to 120°C, and stir for about 30 minutes to dissolve completely and show a homogeneous solution; weigh 10 parts of acrylic acid and 20 parts of water, placed in an open container and fully dissolved to form a homogeneous aqueous solution, using 8.5 parts of potassium hydroxide; respectively, add 1.0 parts of benzoyl peroxide and 0.1 part of potassium persulfate and mix well; mix the two solutions, The temperature was maintained at 90° C. and the stirring was continued for 30 minutes to obtain a block product. After pulverization and granulation, a thermoplastic elastic material with a particle size of 74 μm to 125 μm was obtained.
Embodiment 2
[0068] Weigh 150 parts of KH570 and 100 parts of TPU powder, place them in a four-necked flask with mechanical stirring, a thermometer, and a condenser, heat up to 120°C, stir for about 30 minutes to dissolve completely, and be a homogeneous solution; take 20 parts of clothing Aconic acid and 40 parts of water were fully dissolved in an open container to form a homogeneous aqueous solution. Use 12 parts of sodium hydroxide; respectively add 0.75 parts of azobisisobutyronitrile and 0.2 parts of ammonium persulfate and mix well; mix the two solutions Mix uniformly, maintain the temperature at 90°C, and continue stirring for 30 minutes to obtain a block product. After pulverization and granulation, a thermoplastic elastic material with a particle size of 74 μm to 125 μm is obtained.
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