Preparation method of sheet type high-temperature-resistant self-suspension plugging agent
A high-temperature-resistant, self-suspension technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of difficult adjustment and control of thickness, poor suspension dispersion, insufficient temperature resistance, etc., to achieve excellent heat resistance, durability Good thermal performance and wide application range
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[0032] Example 1:
[0033] (1) Preparation of high temperature resistant thermosetting resin sheet: 140g of amino silicone oil and 162g of formaldehyde solution (37%) were dispersed with 200ml of dioxane respectively, and then put into the reactor and stirred and mixed. The temperature of the reactor was controlled below 10℃, and slowly added 228g of bisphenol A; after mixing uniformly, the reaction is heated and refluxed for 3 hours; then the reaction is stopped, the solvent is removed by evaporation, and a viscous prepolymer liquid is obtained. 1% hydrochloric acid is added to the obtained prepolymer liquid, and the mixture is evenly mixed before loading Put it into the mold, raise the temperature to 220°C, and react for 6 hours to obtain a high temperature resistant thermosetting resin sheet;
[0034] (2) Surface graft modification of heat-resistant thermosetting resin sheet: After the surface of the heat-resistant thermosetting resin sheet obtained in step (1) is activated with...
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[0035] Example 2:
[0036] (1) Preparation of high temperature resistant thermosetting resin sheet: 154g of amino silicone oil and 180g of formaldehyde aqueous solution (37%) were dispersed with 220ml of dioxane respectively, and then put into the reactor and stirred and mixed. The temperature of the reactor was controlled below 10℃ and added slowly 240g bisphenol A. After the mixture is uniform, the temperature is increased, and the reaction is refluxed for 4 hours. Then the reaction was stopped, and the solvent was evaporated to obtain a viscous prepolymer liquid. Add 1.5% hydrochloric acid to the obtained prepolymer liquid, mix it evenly, put it into a mold, raise the temperature to 250°C, and react for 5 hours to obtain the high temperature resistant thermosetting resin sheet of the present invention;
[0037] (2) Surface graft modification of the heat-resistant thermosetting resin sheet: After the surface of the heat-resistant thermosetting resin sheet obtained in step (1) i...
Example Embodiment
[0038] Example 3:
[0039] (1) Preparation of high temperature resistant thermosetting resin sheet: 168g of amino silicone oil and 190g of formaldehyde solution (37%) were dispersed with 250ml of dioxane respectively, and then put into the reactor and stirred and mixed. The temperature of the reactor was controlled below 10℃ and added slowly 273g of bisphenol A; after mixing uniformly, the reaction is heated and refluxed for 5 hours, then the reaction is stopped, the solvent is removed by evaporation, and a viscous prepolymer liquid is obtained. 2% hydrochloric acid is added to the obtained prepolymer liquid, and the mixture is uniformly mixed and charged In the mold, the temperature is raised to 250°C and reacted for 4 hours to obtain the high temperature resistant thermosetting resin sheet of the present invention;
[0040] (2) Surface graft modification of heat-resistant thermosetting resin sheet: After the surface of the heat-resistant thermosetting resin sheet obtained in step...
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