Preparation method of thixotropic self-repair sealing filler

A sealing packing and self-repairing technology, which is applied in sealing devices, chemical instruments and methods, transportation and packaging, etc., can solve the problems of poor resilience of sealing packing, stress relaxation, metal rust, etc., achieve good fluidity and enhance siphon Effect, the effect of not easy to rust

Inactive Publication Date: 2018-09-14
吴刚
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Problems solved by technology

[0006] The technical problem mainly solved by the present invention is that the poor resilience of the current sealing packing affects the compensation of stress relaxation caused by the loss of solid volume, and the high rotational speed...

Method used

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  • Preparation method of thixotropic self-repair sealing filler

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Embodiment Construction

[0024]Add 20-25g of urea and 70-80mL of formaldehyde solution with a mass fraction of 35% into the conical flask, stir until the urea is completely dissolved, then use triethanolamine to adjust the pH of the reaction system in the conical flask to 8.5-9.5, and put the conical flask Put it into a water bath, heat up to 70-80°C, and keep it warm for 40-50 minutes to obtain a viscous transparent liquid. After cooling to room temperature, adjust the pH to 6.8-7.0 with 10% hydrochloric acid to obtain urea-formaldehyde pre- Polymer; mix fluorocarbon resin masterbatch and E-51 type epoxy resin masterbatch according to the mass ratio of 3:2 to obtain oil-soluble capsule core, add 100-120mL ten Sodium dialkylbenzenesulfonate solution, 40-45g oil-soluble capsule core and 0.5-1.0mL n-butanol, start the agitator, stir at a speed of 500-550r / min, emulsify and disperse for 30-35min, and obtain an oil-in-water emulsion ; Add 60-70mL urea-formaldehyde prepolymer to 120-130mL of the above oil-...

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Abstract

The invention relates to the technical field of sealing fillers, in particular to a preparation method of a thixotropic self-repair sealing filler. Urea and formaldehyde serve as raw materials and react under alkaline conditions to form a methylol urea and dimethylol urea mixed prepolymer, the prepolymer is heated and cured to obtain a microcapsule taking epoxy-fluorine-carbon composite resin as acapsule core, siphon action generated by abrasion fracture can be enhanced by a doped carbon nanotube, so that an abrasion position of a metal coating can be rapidly repaired completely, a metal surface is not easy to rust by the aid of unsaturated resin, a rust-proof oil film on the surface of the sealing filler contains benzotriazole which can penetrate a rust-proof inner film by gasification,a special complex is generated on the metal surface, an external metal surface can be isolated from the outside, mixed raw materials such as nickel oxide, potassium oxide and potassium chloride can form a firm abrasion-resistant compact ceramic layer on the metal surface, electrochemical corrosion of the metal surface is avoided, and the preparation method is wide in application prospect.

Description

technical field [0001] The invention relates to the technical field of sealing packing preparation, in particular to a preparation method of a thixotropic self-repairing sealing packing. Background technique [0002] Whether the valve or pump is good or bad, in addition to the material and structure of the valve or pump meeting the requirements of the working medium, the choice of sealing structure and form is also crucial. Reasonable selection of sealing structure and form is the key to ensure normal and orderly production, reduce maintenance and repair costs, reduce engineering labor intensity, reduce material waste, and avoid environmental pollution. [0003] Packing seal is also called gland packing seal, also known as packing seal. The packing seal has the characteristics of relatively simple structure, low cost, and convenient equipment maintenance, so it is widely used. Its sealing principle mainly depends on the labyrinth effect and bearing effect. The so-called l...

Claims

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Application Information

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IPC IPC(8): C08L27/16C08L25/06C08L31/04C08L1/28C08L63/00C08L61/24C08K13/02C08K5/3475C08K3/04C08K3/22C08K3/16C09K3/10
CPCC08K2003/2241C08K2003/2293C08L27/16C09K3/10C09K2003/1071C09K2200/0208C09K2200/0452C09K2200/0476C09K2200/0622C09K2200/0632C09K2200/0637C09K2200/0647C09K2200/0677C08L25/06C08L31/04C08L1/286C08L63/00C08L61/24C08K13/02C08K5/3475C08K3/041C08K3/22C08K3/16
Inventor 吴刚何伟仁张建初
Owner 吴刚
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