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High-strength self-lubricating polyurethane piston sealing body and preparation method thereof

A polyurethane prepolymer and sealing body technology, which is applied in the field of polymer materials, can solve the problems of high wear and low strength, and achieve the effects of enhanced wear-reducing particle distribution, low cost, and excellent mechanical properties

Pending Publication Date: 2022-01-28
JIANGSU XCMG CONSTR MASCH RES INST LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the purposes of the present invention is to provide a high-strength self-lubricating polyurethane piston to solve the problems of low strength and high wear of the existing polyurethane piston

Method used

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  • High-strength self-lubricating polyurethane piston sealing body and preparation method thereof
  • High-strength self-lubricating polyurethane piston sealing body and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] (1) Take 2500g of ultra-high molecular weight polyethylene powder and put it into a mixed solution of saturated potassium permanganate solution and 50% concentration of nitric acid, heat to 80°C and stir for 30min, then filter out the powder, then repeatedly wash with deionized water, filter. After drying, add it to a high-speed mixer, adjust the speed to 1500rpm, adjust the temperature to 70°C, and add 7.5 grams of coupling agent KH550 dropwise for coupling treatment for later use;

[0087] (2) Take 750g of polytetrafluoroethylene powder and put it into the sodium naphthalene solution, make it fully submerged, and then stir. Repeatedly use tetrahydrofuran to wash and filter; dry in an oven for 150 hours, grind and disperse for later use;

[0088] (3) Take 250 grams of alumina powder and put it into a high-speed mixer, adjust the rotating speed to 2000 rpm, adjust the temperature to 70 ° C, and add 5 grams of coupling agent KH550 dropwise for coupling treatment for lat...

Embodiment 2

[0096](1) Take 1250g of ultra-high molecular weight polyethylene powder and put it into a mixed solution of saturated potassium permanganate solution and 50% concentration of nitric acid, heat to 80°C and stir for 30min, then filter out the powder, then repeatedly wash with deionized water, filter. After drying, add it to a high-speed mixer, adjust the speed to 1500rpm, adjust the temperature to 70°C, and add 7.5 grams of coupling agent KH550 dropwise for coupling treatment for later use;

[0097] (2) Take 500g of polytetrafluoroethylene powder and put it into the sodium naphthalene solution, make it fully submerged, and then stir. Repeatedly use tetrahydrofuran to wash and filter; dry in an oven for 150 hours, grind and disperse for later use;

[0098] (3) Take 250 grams of alumina powder and put it into a high-speed mixer, adjust the rotating speed to 2000 rpm, adjust the temperature to 70 ° C, and add 5 grams of coupling agent KH550 dropwise for coupling treatment for late...

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Abstract

The invention relates to the field of polymer materials, in particular to a high-strength self-lubricating polyurethane piston sealing body and a preparation method thereof. Specifically, the invention relates to a composition which can be used for preparing a piston sealing body, the piston sealing body prepared from the composition, and a method for preparing the piston sealing body. The piston sealing body can be used as a concrete piston sealing body for concrete pumping equipment.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a composition that can be used to prepare a piston sealing body, a piston sealing body prepared from the composition, and a method for preparing the piston sealing body. The piston sealing body can be used as a concrete piston sealing body for concrete pumping equipment. Background technique [0002] Piston is the key core component of concrete pumping equipment (such as pump truck, trailer pump, vehicle-mounted pump), which plays the role of sealing the cavity and pushing concrete during the concrete delivery process. Because the concrete medium to be transported is hard and has complex components, and the pumping pressure is high and the sealing performance is high, the piston needs to have good mechanical strength and wear resistance. The pistons currently used have a short service life, frequent replacement and high operating costs. [0003] Existing piston sealing body mai...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08L23/06C08L27/18C08K3/22C08K9/06F04B53/14E04G21/02
CPCC08L75/08F04B53/14E04G21/02C08L2207/068C08K2003/2227C08L23/06C08L27/18C08K3/22C08K9/06
Inventor 陈波朱志峰袁松
Owner JIANGSU XCMG CONSTR MASCH RES INST LTD
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