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Application of hydrogenated nitrile-butadiene rubber in gas appliance taking dimethyl ether as fuel

A technology of hydrogenated nitrile rubber and dimethyl ether, which is applied in application, heating fuel, gaseous heating fuel, etc., can solve problems such as bottle valve leakage, and achieve the effects of avoiding leakage accidents, good stability, and good heat resistance

Inactive Publication Date: 2010-10-06
谢启标
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, due to the negative swelling effect of dimethyl ether (DME) on liquefied petroleum gas cylinder valves, pressure reducing valves, gas pipelines and stove sealing rubber parts, there have been successive incidents of cylinder valve leakage across the country.

Method used

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  • Application of hydrogenated nitrile-butadiene rubber in gas appliance taking dimethyl ether as fuel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Weight and volume change test of hydrogenated nitrile rubber, nitrile rubber and silicone rubber in different gases:

[0023] Configure fuel with three different compositions:

[0024] The first type: LPG (liquefied petroleum gas) containing 2% DME;

[0025] The second type: LPG containing 50% DME;

[0026] The third type: 100% DME;

[0027] Weigh the sample:

[0028] Take 100×100mm samples of nitrile rubber, hydrogenated nitrile rubber and silicone rubber respectively, take three pieces of each, weigh their weights and measure their volumes, and put three samples of each type into the above three In the gas space of the fuel, place it statically for 360 days, measure its weight and volume after taking it out, and obtain the rate of change before and after it is placed in the gas space of the fuel (see Table 1).

[0029] Table 1 Weight and volume change data of three non-metallic materials

[0030]

[0031] From the above test results, it can be clearly conclude...

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Abstract

The invention relates to a new application of hydrogenated nitrile-butadiene rubber (HNBR). The HNBR has high saturability, favorable heat resistance, favorable chemical corrosion resistance (excellent resistibility on Freon, acid and alkali), favorable ozone resistance, higher compression set resistance and favorable stability on various polar dielectrics, and can serve as the seal ring of the gas appliance which takes dimethyl ether as fuel so as to solve the problem that the dimethyl ether produces negative swelling to liquefied petroleum gas cylinder valves, reducing valves, gas transmission pipelines and stove sealing rubber pieces and avoid the occurrence of leakage accidents.

Description

technical field [0001] The invention relates to a new application of hydrogenated nitrile butadiene rubber (HNBR), in particular to the application of a sealing ring made of hydrogenated nitrile butadiene rubber in gas appliances using dimethyl ether as fuel. Background technique [0002] Dimethyl ether is also called methyl ether, or DME for short. Its English name is dimethylether, and its molecular formula is CH 3 -O-CH 3 , relative vapor density (air is 1) 1.62, explosion range: 3.4-27.0% (V / V), ignition temperature: 350°C, dimethyl ether is easily soluble in water, alcohol and ether. [0003] DME is inert, non-corrosive, non-carcinogenic, and almost non-toxic. Dimethyl ether does not form peroxides on long-term exposure to air. It is a colorless gas under normal pressure and has a characteristic odor of ethers. As a substitute for freon, dimethyl ether is rapidly increasing in use in the aerosol and refrigerant industries. [0004] With the increasing price of pet...

Claims

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Application Information

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IPC IPC(8): F24C3/00C08L15/00
Inventor 谢启标
Owner 谢启标