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Preparation method for sealing gasket used for stretch-proof pipeline valve

A pipeline valve and gasket technology, applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve the problems of large gap between the valve core and the valve body, leakage of liquid in the pipeline, reduced sealing, etc., to improve the dispersion effect. , the effect of high elongation at break and low cost

Inactive Publication Date: 2019-04-02
ANHUI RONGDA VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The valve is a standard part commonly used in the connection of pipe fittings. It controls the flow of two or more pipes and plays the role of interception and diversion. The existing valve structure is simple, and the gap between the valve core and the valve body becomes smaller after long-term use. The larger the size, the lower the sealing performance, resulting in the leakage of liquid in the pipeline. At present, sealing gaskets are often added between the valve core and the valve body to enhance the sealing performance, which also has higher requirements for sealing gaskets, but the current Gaskets are still not ideal in terms of tensile strength, thermal stability and flame retardancy, and there is a lot of room for further improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method for a sealing gasket for a stretch-resistant pipeline valve, comprising the steps of:

[0021] S1. Mix 60kg of polyvinyl alcohol, 40kg of alkyd resin, 10kg of microcrystalline paraffin, and 4kg of dibenzoyl peroxide evenly, and add 6kg of acrylic acid emulsion with a solid content of 54% to it under stirring. The stirring temperature is 125°C. 1.2kg of polyetheramine D230, 0.2kg of tris-(dimethylaminomethyl)phenol were stirred for 8 hours, the stirring temperature was 96°C, the temperature was lowered, dried, and pulverized to obtain a preform;

[0022] S2, 80kg neoprene rubber, 30kg metallocene polyethylene, 5kg prefabricated material, 2kg vaseline, 2kg disproportionated rosin, 0.4kg epoxy soybean oil, 1.4kg titanate coupling agent, 25kg heavy calcium carbonate, 30kg graphite oxide Alkene, 10kg calcium-based bentonite, 1.6kg tridecyl phosphite, 2kg ultraviolet absorber UV-360, 5kg magnesium stearate, 2kg1,1-bis-(tert-butylperoxy)cyclohexane, 2.5kg ...

Embodiment 2

[0025] A preparation method for a sealing gasket for a stretch-resistant pipeline valve, comprising the steps of:

[0026] S1. Mix 100kg polyvinyl alcohol, 20kg alkyd resin, 20kg microcrystalline paraffin, and 2kg dibenzoyl peroxide evenly, add 14kg of acrylic acid emulsion with a solid content of 50% to it under stirring, the stirring temperature is 135°C, add Stir 0.6kg of polyetheramine D230 and 0.6kg of tris-(dimethylaminomethyl)phenol for 4 hours at a stirring temperature of 100°C, cool down, dry, and pulverize to obtain a preform;

[0027] S2, 60kg neoprene rubber, 50kg metallocene polyethylene, 3kg prefabricated material, 4kg vaseline, 1kg disproportionated rosin, 1.6kg epoxy soybean oil, 0.8kg titanate coupling agent, 35kg heavy calcium carbonate, 20kg graphite oxide ene, 20kg calcium-based bentonite, 0.8kg tridecyl phosphite, 3kg ultraviolet absorber UV-360, 3kg magnesium stearate, 2.8kg1,1-bis-(tert-butylperoxy)cyclohexane, 1.5kg di Ethylamine was mixed for 20 minut...

Embodiment 3

[0030] A preparation method for a sealing gasket for a stretch-resistant pipeline valve, comprising the steps of:

[0031] S1, 70kg of polyvinyl alcohol, 35kg of alkyd resin, 12kg of microcrystalline paraffin, and 3.5kg of dibenzoyl peroxide were mixed evenly, and 8kg of acrylic acid emulsion with a solid content of 53% was added thereto under stirring, and the stirring temperature was 128°C. Add 1 kg of polyetheramine D230, 0.3 kg of tris-(dimethylaminomethyl)phenol and stir for 7 hours at a stirring temperature of 97°C, cool down, dry, and pulverize to obtain a preform;

[0032] S2, 75kg neoprene rubber, 35kg metallocene polyethylene, 4.5kg prefabricated material, 2.5kg vaseline, 1.7kg disproportionated rosin, 0.6kg epoxy soybean oil, 1.2kg titanate coupling agent, 28kg heavy calcium carbonate, 28kg graphene oxide, 13kg calcium-based bentonite, 1.4kg tridecyl phosphite, 2.3kg ultraviolet absorber UV-360, 4.5kg magnesium stearate, 2.2kg 1,1-bis-(tert-butylperoxy)cyclohexyl A...

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Abstract

The invention discloses a preparation method for a sealing gasket used for a stretch-proof pipeline valve. The preparation method comprises the following steps: uniformly mixing polyvinyl alcohol, alkyd resin, microcrystalline wax and dibenzoyl peroxide, adding an acrylic emulsion into an obtained mixture under stirring, adding polyetheramine D230 and tri-(dimethylaminomethyl)phenol, and carryingout stirring, cooling, drying and crushing so as to obtain a prefabricated material; mixing chloroprene rubber, metallocene polyethylene, the prefabricated material, vaseline, disproportionated rosin,epoxidized soybean oil, a titanate coupling agent, heavyweight calcium carbonate, graphene oxide, calcium-based bentonite, tridecyl phosphite, an ultraviolet light absorber UV-360, magnesium stearate, 1,1-bis-(tert-butylperoxy)cyclohexane and diethylamine so as to obtain a mixed rubber material; and sending the mixed rubber material into a double-screw extruder for extrusion, and carrying out drying and injection molding so as to obtain the sealing gasket used for the stretch-proof pipeline valve.

Description

technical field [0001] The invention relates to the technical field of sealing gaskets, in particular to a preparation method of sealing gaskets for stretch-resistant pipeline valves. Background technique [0002] The valve is a standard part commonly used in the connection of pipe fittings. It controls the flow of two or more pipes and plays the role of interception and diversion. The existing valve structure is simple, and the gap between the valve core and the valve body becomes smaller after long-term use. The larger the size, the lower the sealing performance, resulting in the leakage of liquid in the pipeline. At present, sealing gaskets are often added between the valve core and the valve body to enhance the sealing performance, which also has higher requirements for sealing gaskets, but the current The sealing gasket is still not ideal in terms of tensile strength, thermal stability and flame retardancy, and there is a lot of room for further improvement. Contents ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L11/00C08L29/04C08L23/06C08L67/08C08L91/06C08L33/04C08L91/00C08L71/02C08K13/02C08K3/26C08K3/04C08K3/34C08K5/524C08K5/14C08K5/17C08K5/18F16J15/14
CPCC08L11/00C08L29/04C08L2201/02C08L2201/08C08L2203/18C08L2205/025C08L2205/035F16J15/14C08L23/06C08L67/08C08L91/06C08L33/04C08L91/00C08L71/02C08K13/02C08K3/26C08K3/042C08K3/346C08K5/524C08K5/14C08K5/17C08K5/18
Inventor 胡启明
Owner ANHUI RONGDA VALVE