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Preparation method and application of self-repairing high-temperature-resistant polyurethane elastomer

A polyurethane elastomer, self-healing technology, applied in the field of self-healing polymer material synthesis, polyurethane elastomer, can solve the problems of polyurethane piston damage, low wear resistance, temperature rise in the wear pump, etc., to overcome damage and high hardness , the effect of prolonging the service life

Pending Publication Date: 2022-03-04
胡先海
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the drilling process, the mud pump piston is damaged and replaced frequently, which greatly reduces the drilling efficiency, affects the production progress, and also wastes a lot of money on the replacement of the mud pump piston
[0003] Pistons are generally made of rubber or ordinary polyurethane, but rubber pistons have disadvantages such as low hardness, poor high temperature resistance, poor pressure bearing capacity, and low wear resistance. Compared with rubber pistons, existing polyurethane pistons show better resistance Abrasive, but with the increase of pumping time and the continuous conversion of internal energy, the wear increases and the temperature in the pump continues to rise, resulting in serious damage and irreversible deformation of the polyurethane piston

Method used

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  • Preparation method and application of self-repairing high-temperature-resistant polyurethane elastomer
  • Preparation method and application of self-repairing high-temperature-resistant polyurethane elastomer
  • Preparation method and application of self-repairing high-temperature-resistant polyurethane elastomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of self-healing high temperature resistant polyurethane elastomer, comprising the following steps:

[0028] S1: Grind the aramid fiber into particles with a particle size of 10 μm, and then add it to a phosphoric acid solution with a mass concentration of 50% at a ratio of 1g / 1mL. After stirring and dispersing, heat up to 100°C for 15 minutes, filter, and then Wash with distilled water until neutral to obtain modified aramid fiber;

[0029] S2: Weigh 55 parts of polytetramethylene ether glycol, 20 parts of 4,4 diphenylmethane diisocyanate, 20 parts of hexamethylene diisocyanate, 3,3'-dithiobis (Propionylhydrazide) 2 parts, 1-(2-aminoethyl) imidazolin-2-one 1 part, ferric chloride 0.2 parts, copper chloride 0.2 parts, acetone 20 parts, 3,3'-dichloro- 9 parts of 4,4'-diaminodiphenylmethane, 0.2 parts of dibutyltin dilaurate, 2 parts of modified aramid fiber;

[0030] S3: At a temperature of 110°C and a vacuum degree of ≤0.1MPa, dehydrate polytetrame...

Embodiment 2

[0035] A preparation method of self-healing high temperature resistant polyurethane elastomer, comprising the following steps:

[0036] S1: Grind the modified ultra-high molecular weight polyethylene into particles with a particle size of 50 μm, and then add it to potassium dichromate, concentrated sulfuric acid with a mass fraction of 98%, and water at a ratio of 1 g / 1.25 mL. 2:10 mass ratio of the mixed solution prepared, 25 ℃ room temperature stirring treatment for 40min, after filtration, and then washed with distilled water until neutral, that is, modified ultra-high molecular weight polyethylene;

[0037] S2: Weigh 60 parts of polytetramethylene ether glycol, 25 parts of 4,4 diphenylmethane diisocyanate, 20 parts of hexamethylene diisocyanate, 3,3'-dithiobis (Propionylhydrazide) 3 parts, 1-(2-aminoethyl) imidazolin-2-one 1.5 parts, ferric chloride 0.3 parts, copper chloride 0.3 parts, acetone 25 parts, hydroquinone-bis(β-hydroxy 14 parts of ethyl) ether, 0.25 part of di...

Embodiment 3

[0043] A preparation method of self-healing high temperature resistant polyurethane elastomer, comprising the following steps:

[0044] S1: Grind aramid fiber into particles with a particle size of 10-100 μm, then add it to a phosphoric acid solution with a mass concentration of 50% at a ratio of 1g / 1.5mL, stir and disperse, heat up to 120°C for 60 minutes, and filter After that, it is washed with distilled water to neutrality, and the modified aramid fiber is obtained;

[0045] S2: Weigh 65 parts of polytetramethylene ether glycol, 30 parts of 4,4 diphenylmethane diisocyanate, 25 parts of hexamethylene diisocyanate, 3,3'-dithiobis (propionylhydrazide) 4 parts, 1-(2-aminoethyl) imidazolin-2-one 2 parts, ferric chloride 0.4 parts, copper chloride 0.4 parts, acetone 30 parts, 3,3'-dichloro- 18 parts of 4,4'-diaminodiphenylmethane, 0.3 parts of triethylamine, 4 parts of modified aramid fiber;

[0046] S3: Under the conditions of temperature 110-120°C and vacuum degree ≤0.1MPa, ...

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Abstract

The invention discloses a self-repairing high-temperature-resistant polyurethane elastomer as well as a preparation method and application thereof. The self-repairing high-temperature-resistant polyurethane elastomer is self-repaired by utilizing multiple reversible crosslinking effects of a disulfide bond, a hydrogen bond, a coordination bond and an ionic bond; the polyurethane elastomer is prepared from the following raw materials in parts by mass: 55 to 65 parts of polytetramethylene ether glycol, 20 to 30 parts of 4, 4 diphenylmethane diisocyanate, 20 to 25 parts of hexamethylene diisocyanate, 2 to 4 parts of 3, 3 '-dithiobis (propionyl hydrazide), 1 to 2 parts of 1-(2-aminoethyl) imidazoline-2-ketone, 0.2 to 0.4 part of ferric chloride, 0.2 to 0.4 part of copper chloride, 20 to 30 parts of acetone, 9 to 18 parts of a chain extender, 0.2 to 0.3 part of a catalyst and 1 to 15 parts of modified polymer powder. The prepared self-repairing high-temperature-resistant polyurethane elastomer does not need external stimulation, can achieve the self-repairing function even under the conditions of normal pressure and normal temperature, effectively solves the problems of damage, deformation and abrasion caused by internal energy conversion when a polyurethane piston works, and has the advantages of being high in hardness, resistant to abrasion, resistant to high temperature, resistant to high pressure and the like.

Description

technical field [0001] The invention belongs to the field of synthesis of self-repairing polymer materials, and also belongs to the technical field of polyurethane elastomers, in particular to a preparation method and application of self-repairing high-temperature-resistant polyurethane elastomers. Background technique [0002] Piston and rubber are one of the most important parts of mud pump in the drilling process, and their working environment is very harsh. During the drilling process, the mud pump piston is damaged and replaced frequently, which greatly reduces the drilling efficiency and affects the production progress, and also wastes a lot of money on the cost of replacing the mud pump piston. [0003] Pistons are generally made of rubber or ordinary polyurethane, but rubber pistons have disadvantages such as low hardness, poor high temperature resistance, poor pressure bearing capacity, and low wear resistance. Compared with rubber pistons, existing polyurethane pis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/12C08G18/32C08G18/48C08G18/73C08G18/76C08L75/08
CPCC08G18/4854C08G18/7671C08G18/73C08G18/12C08G18/3834C08G18/3848C08G18/6685C08L75/08C08G2280/00C08G18/3814C08G18/3212
Inventor 胡先海
Owner 胡先海
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