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Outdoor valve sealing gasket in southern region

A kind of valve sealing, the technology of the southern region, used in the field of valve gaskets, to achieve the effect of high crosslinking density, light weight, and improved dispersibility

Inactive Publication Date: 2019-03-19
ANHUI RONGDA VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The temperature in the southern region can often reach 40°C above zero, and the general equipment is in an unattended area. The valve gasket should have good thermal stability and certain flame retardancy when working under this condition. Difficulty working in such an environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A sealing pad for outdoor valves in southern China, the raw materials of which include: 75kg of neoprene rubber, 45kg of chlorosulfonated polyethylene, 20kg of fluorosilicone rubber, 8kg of polytetrafluoroethylene degradation compound, 60kg of filling reinforcing agent, tert-butyl dimethyl Chlorosilane 2.5kg, disproportionated rosin 1kg, hydroxyl silicone oil 2kg, crosslinking agent 2kg, ultraviolet absorber 3.5kg, antioxidant BHT 2kg.

[0019] The filling and reinforcing agent is composed of polyacrylonitrile-based carbon fiber, zeolite powder and medical stone powder in a weight ratio of 25:30:35. The crosslinking agent is composed of tert-butyl peroxybenzoate, trimethylolpropane triacrylate and zinc oxide in a weight ratio of 1:0.8:0.2.

[0020] The polytetrafluoroethylene degradation compound is prepared by the following process: 16kg of polytetrafluoroethylene resin is irradiated and degraded, the irradiation dose is 0.4MGy, exhausted and degassed, crushed to a par...

Embodiment 2

[0022] A sealing pad for outdoor valves in southern China, its raw materials include: 85kg neoprene rubber, 25kg chlorosulfonated polyethylene, 30kg fluorosilicone rubber, 4kg polytetrafluoroethylene degradation compound, 80kg filling reinforcing agent, tert-butyl dimethyl Chlorosilane 1.5kg, disproportionated rosin 2kg, hydroxyl silicone oil 1kg, crosslinking agent 4kg, ultraviolet light absorber 1.5kg, antioxidant BHT 4kg.

[0023] The filling and reinforcing agent is composed of polyacrylonitrile-based carbon fiber, zeolite powder and medical stone powder in a weight ratio of 15:40:15. The crosslinking agent is composed of tert-butyl peroxybenzoate, trimethylolpropane triacrylate and zinc oxide in a weight ratio of 2:0.4:0.4.

[0024] The polytetrafluoroethylene degradation compound is prepared by the following process: 8kg polytetrafluoroethylene resin is irradiated and degraded, the irradiation dose is 0.48MGy, exhausted and degassed, crushed to a particle size of 10-20μm...

Embodiment 3

[0026] A sealing pad for outdoor valves in southern China, its raw materials include: 78kg neoprene rubber, 40kg chlorosulfonated polyethylene, 22kg fluorosilicone rubber, 7kg polytetrafluoroethylene degradation compound, 65kg filling reinforcing agent, tert-butyl dimethyl Chlorosilane 2.2kg, disproportionated rosin 1.3kg, hydroxyl silicone oil 1.8kg, crosslinking agent 2.5kg, ultraviolet absorber 3kg, antioxidant BHT 2.5kg.

[0027] The filling and reinforcing agent is composed of polyacrylonitrile-based carbon fiber, zeolite powder and medical stone powder in a weight ratio of 22:33:30. The crosslinking agent is composed of tert-butyl peroxybenzoate, trimethylolpropane triacrylate and zinc oxide in a weight ratio of 1.2:0.7:0.25.

[0028] The polytetrafluoroethylene degradation compound is prepared by the following process: 14kg polytetrafluoroethylene resin is irradiated and degraded, the irradiation dose is 0.42MGy, exhausted and degassed, crushed to a particle size of 10-...

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PUM

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Abstract

The invention discloses an outdoor valve sealing gasket in a southern region. The outdoor valve sealing gasket comprises the following raw materials in parts by weight: 75-85 parts of chloroprene rubber, 25-45 parts of chlorosulphonated polyethylene, 20-30 parts of fluorinated silicone rubber, 4-8 parts of a polytetrafluoroethylene degradation complex, 60-80 parts of a filling reinforcing agent, 1.5-2.5 parts of tert-butyldimethylsilyl chloride, 1-2 parts of disproportionated rosin, 1-2 parts of hydroxyl silicone oil, 2-4 parts of a cross-linking agent, 1.5-3.5 parts of an ultraviolet absorberand 2-4 parts of an antioxidant BHT. The polytetrafluoroethylene degradation complex is prepared by the following process steps: performing irradiation-induced degradation on the polytetrafluoroethylene resin, exhausting air and degassing, grinding, adding collagens, keratin and water to be uniformly mixed, regulating the pH value of the system to be 6.1-6.5, stirring, filtering, washing, and drying, thereby obtaining the polytetrafluoroethylene degradation complex.

Description

technical field [0001] The invention relates to the technical field of valve sealing pads, in particular to an outdoor valve sealing pad in the southern region. Background technique [0002] China has a vast land, which makes the climate very different, and the huge temperature difference puts forward higher requirements for our valves, especially the valve gaskets that play a sealing role. The temperature in the southern region can often reach 40°C above zero, and the general equipment is in an unattended area. The valve gasket should have good thermal stability and certain flame retardancy when working under this condition. Difficult to function properly in such an environment. Contents of the invention [0003] Based on the technical problems in the background technology, the present invention proposes a sealing gasket for outdoor valves in the southern region, which has excellent low temperature resistance, good toughness, and excellent waterproof performance. [000...

Claims

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Application Information

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IPC IPC(8): C08L11/00C08L23/34C08L83/08C08L93/04C08L27/18C08L89/00C08K13/04C08K7/06C08K7/26C08K3/34C08K5/14C08K3/22C09K3/10
CPCC08K2003/2296C08L11/00C08L2205/025C08L2205/035C08L2312/00C09K3/10C08L23/34C08L83/08C08L93/04C08L27/18C08L89/00C08K13/04C08K7/06C08K7/26C08K3/346C08K5/14C08K3/22
Inventor 胡启明
Owner ANHUI RONGDA VALVE
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