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Anti-aging sealing gasket for pipeline valves

A technology for sealing gaskets and pipeline valves, applied in the field of valve sealing gaskets, can solve problems such as threats to life and property safety, insufficient aging resistance, etc., and achieve the effects of good thermal stability, good chemical inertness, and good dispersion.

Inactive Publication Date: 2019-04-12
安徽中斯特流体设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of pipeline valves, the required gaskets have also become diversified, and there are more stringent and diverse requirements for the performance indicators of valve gasket materials. It is economical and economical to continuously improve the performance of gaskets. Due to the urgent needs of social development, traditional sealing gaskets often have insufficient aging resistance, which brings a lot of inconvenience to actual use and even threatens the safety of people's lives and property.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] An aging-resistant sealing gasket for pipeline valves, its raw materials include: ethylene propylene rubber 40kg, silicone rubber 50kg, nitrile silicone rubber 10kg, crosslinking agent 4kg, polyacrylonitrile-based carbon fiber 20kg, heavy calcium carbonate 12kg, dispersant 3kg , Acetyl tributyl citrate 1kg, calcium stearate 1kg, butyl phthalate 2kg, pentaerythritol 0.2kg, anti-aging agent 3kg, UV absorber 1kg.

[0018] The crosslinking agent is composed of triallyl isocyanurate, tert-butyl hydroperoxide and dicumyl peroxide in a weight ratio of 2:0.2:1.2. The dispersant is composed of polyethylene wax compound and disproportionated rosin in a weight ratio of 2:1.5.

[0019] The polyethylene wax compound is prepared by the following process: mix 4kg polytetrafluoroethylene, 2kg acrylic acid, and 30kg epoxy soybean oil evenly, irradiate with plasma for 12min, and the irradiation power is 450W, crush until the particle size is 30-50μm, add 12kg The polyethylene wax was st...

Embodiment 2

[0021] An aging-resistant sealing gasket for pipeline valves, its raw materials include: 100kg of ethylene-propylene rubber, 32kg of silicone rubber, 19kg of nitrile silicone rubber, 2kg of crosslinking agent, 30kg of polyacrylonitrile-based carbon fiber, 6kg of heavy calcium carbonate, and 6kg of dispersant , Acetyl tributyl citrate 0.4kg, calcium stearate 2kg, butyl phthalate 1kg, pentaerythritol 1kg, antioxidant 1kg, UV absorber 4kg.

[0022] The crosslinking agent is composed of triallyl isocyanurate, tert-butyl hydroperoxide and dicumyl peroxide in a weight ratio of 1:0.8:0.4. The dispersant is composed of polyethylene wax compound and disproportionated rosin in a weight ratio of 4:0.4.

[0023] The polyethylene wax compound is prepared by the following process: mix 12kg of polytetrafluoroethylene, 1.4kg of acrylic acid, and 50kg of epoxy soybean oil evenly, irradiate with plasma for 3 minutes, and the irradiation power is 500W, crush until the particle size is 30-50μm, a...

Embodiment 3

[0025] An aging-resistant sealing gasket for pipeline valves, its raw materials include: ethylene propylene rubber 60kg, silicone rubber 44kg, nitrile silicone rubber 12kg, crosslinking agent 3.5kg, polyacrylonitrile-based carbon fiber 22kg, heavy calcium carbonate 10kg, dispersant 4kg, acetyl tributyl citrate 0.8kg, calcium stearate 1.3kg, butyl phthalate 1.7kg, pentaerythritol 0.4kg, antioxidant 2.5kg, ultraviolet light absorber 2kg.

[0026] The crosslinking agent is composed of triallyl isocyanurate, tert-butyl hydroperoxide and dicumyl peroxide in a weight ratio of 1.7:0.4:1. The dispersant is composed of polyethylene wax compound and disproportionated rosin in a weight ratio of 2.5:1.2.

[0027] The polyethylene wax compound is prepared by the following process: mix 6kg polytetrafluoroethylene, 1.8kg acrylic acid, and 35kg epoxy soybean oil evenly, irradiate with plasma for 10min, and the irradiation power is 460W, crush until the particle size is 35-45μm, add 10 kg of ...

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Abstract

The invention discloses an anti-aging sealing gasket for pipeline valves. The anti-aging sealing gasket for pipeline valves comprises the following raw materials: in parts by weight, 40-100 parts of ethylene-propylene rubber, 32-50 parts of silicone rubber, 10-19 parts of nitrile silicone rubber, 2-4 parts of a cross-linking agent, 20-30 parts of polyacrylonitrile-based carbon fiber, 6-12 parts ofheavy calcium carbonate, 3-6 parts of dispersing agents, 0.4-1 part of acetyl tributyl citrate, 1-2 parts of calcium stearate, 1-2 parts of butyl phthalate, 0.2-1 part of pentaerythritol, 1-3 parts of an anti-aging agent and 1-4 parts of an ultraviolet light absorbent, wherein the dispersing agents include a polyethylene wax composite and disproportionated rosin, and the polyethylene wax composite is prepared by using a following process: mixing polytetrafluoroethylene, acrylic acid and epoxy soybean oil uniformly, performing plasma irradiation and pulverizing, adding polyethylene wax, and performing stirring so as to obtain the polyethylene wax composite. The anti-aging sealing gasket for the pipeline valves has high tensile strength, good resistance to acid and alkali and excellent aging resistance.

Description

technical field [0001] The invention relates to the technical field of valve sealing gaskets, in particular to an aging-resistant sealing gasket for pipeline valves. Background technique [0002] With the development of pipeline valves, the required gaskets have also become diversified, and there are more stringent and diverse requirements for the performance indicators of valve gasket materials. It is economical and economical to continuously improve the performance of gaskets. Due to the urgent needs of social development, traditional sealing gaskets often have insufficient aging resistance, which brings a lot of inconvenience to actual use and even threatens the safety of people's lives and property. Contents of the invention [0003] Based on the technical problems in the background technology, the present invention proposes an aging-resistant sealing gasket for pipeline valves, which has high tensile strength, good acid and alkali resistance, and excellent aging resis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L83/04C08L83/08C08L23/06C08L93/04C08K13/04C08K7/06C08K3/26
CPCC08K2003/265C08L23/16C08L83/04C08L2201/08C08L2205/035C08L83/08C08L23/06C08L93/04C08K13/04C08K7/06C08K3/26
Inventor 姚惟秀
Owner 安徽中斯特流体设备有限公司