1、Molecular Structure

2、physical and chemical properties

Silicone rubber is a saturated nonpolar rubber formed on the basis of silicon elements obtained from quartz and adhered by silicon atoms such as methyl groups and vinyl groups. Different side chains can cause silicone rubber to have different properties. Methyl vinyl silicone rubber (VMQ) is a more widely used silicone rubber material.

Silicone rubber has excellent heat resistance, low temperature elasticity and special resistance to oxidation and ozone properties, with high permeability and selectivity to gas permeation. Good electrical insulation properties, resistance to corona and arc resistance. But the addition of conductive carbon black, nickel powder, aluminum powder, silver powder, but also the appropriate conductive silicone rubber surface energy is low, with hygroscopicity, can play a role in isolation. Water resistant, but poor water vapor resistance, pressure above 50psi is not recommended. Compatible with most oils, chemicals and solvents. General silicone rubber good acid and alkali resistance, resistance to polar solvents can still, non-resistant alkane and aromatic oil. It is not recommended for use in most concentrated solvents, oils, concentrated acids and diluted aerosol solutions. Special silicone rubber also has resistance to radiation, fire, oil and other properties. Its tensile strength at the end, anti-wear ability is weak, generally not used for dynamic sealing.

3、the temperature range

-60 ℃ ~ 250 ℃ (recommended -40 ~ 230 degrees), special silicone rubber high temperature up to 300 ℃, low temperature to -100 ℃. (TR10 can be at -100 ° C)

4、hardness range

Shore A40 degrees to 90 degrees

5、color

Red, transparent, white, yellow, black, brown, reddish brown, green, blue, orange, gray, can also be specified by the customer color.

6、application

It is widely used as a special material for aviation, cutting-edge technology and military technology. It is also used in all sectors of the national economy. Its application has been expanded to: construction, electrical and electronic, textile, automobile, machinery, leather , Chemical light industry, metal and paint, medical and medical care.

1) the automobile industry

Silicone rubber in the automotive industry in the application of rapid growth, silicone rubber (especially with a variety of characteristics of the silicone rubber) can be resistant to fuel, lubricating oil erosion, improve the use of various parts of the car performance, reduce maintenance costs. Can be used for automotive ignition lines, spark plugs, heating and radiator hoses, muffler lining, battery connectors and fuel pumps made of fluorosilicone rubber. With the development of electronic electrification of the vehicle, room temperature vulcanized silicone rubber is widely used in electronic parts, electrical assembly of the potting material, windshield glass, the body around the seal and the mirror and other adhesive sealant.

2) electronics, electrical industry

Electronics, electrical industry is silicone rubber as the first use of insulating materials, the demand for a larger area. Silicone rubber is mainly used for TV anode cover, high pressure protective cover, high voltage lead wire, refrigerator defroster wire, power or signal transmission with wires and cables. Insulators made of silicone rubber will replace ceramic products widely used in transmission lines, especially ultrahigh voltage lines. Conductive silicone rubber for electronic computers, telephone and other equipment, electrical contact parts and liquid crystal display contact parts. Flame-retardant and radiation-resistant silicone rubber wire and cable are widely used in atomic power plants. Silicone rubber heating sheet, heating belt for the control of a variety of precision instruments and oil pipeline operating temperature, in the medical treatment for heaters with heating blanket. Room temperature vulcanized silicone rubber can be used as waterproof, moisture and shock with potting material. Silicone rubber has a heat-resistant washing liquid performance, has been widely used in dishwashers and washing machines on the pump seal. Silicone rubber is very suitable for use as a coffee pot, electric frying pan and steam iron and other appliances on the gasket. Stereo headphones ear and head pad to silicone rubber, can eliminate external noise, and soft and comfortable.

3) medical field

Silicone rubber has good biocompatibility, the body reaction is small, stable performance, low blood coagulation, can withstand high temperature and pressure multiple cooking, and can be processed into various shapes of products, such as medical equipment seals, all kinds of man-made Human organs, film, sponge, airbag, is currently the most widely used medicine a material.

4) Aerospace industry

Silicone rubber is an indispensable high-performance material in the aerospace industry, it can withstand the ultra-cold space and return to the atmosphere of burning, to extend the life of aircraft parts, reduce maintenance costs, reduce accidents. Mainly used for aircraft body hole seals, electrical connectors, sealed switches, dust and waterproof cover, washers, jet engines and hydraulic devices "O" seal ring, oxygen mask, control diaphragm, hot air duct and Radar wireless shock absorbers and so on. Silicone rubber is suitable for use as a rocket fuel valve, power source cable and rocket launcher coating, so as to avoid the burning of the rocket jet. Room temperature vulcanized silicone rubber can be used as the body airtight seal, window frame seal and shock, moisture potting material.

5) Construction industry

Silicone rubber has good weather resistance and construction, as a bonding sealant in the construction industry has been widely used, more than other types of sealants. In recent years, a low modulus, high elongation, two-component sealant has been developed for the construction of large concrete components such as large concrete preforms and curtain walls. Room temperature vulcanized silicone rubber is also used for the sealing of the asbestos cement board connection, the sealing of the bathroom brick and toilet. With the decline in rubber prices in the future, will further expand the scope of application, such as in the application of road seams instead of asphalt and chloroprene rubber. High temperature vulcanized silicone rubber sponge strip used as a building door and window seal.

6) other areas

In addition to the above applications, silicone rubber in the textile, printing, machinery, plastics, chemicals, paper and food and cosmetics and other areas of application is also significantly increased. A typical product is a roller made of silicone rubber, used for fabric, plastic heat setting, embossing, calendering and copier fixing. Silicone rubber film made of gas window has been used to store fruit and vegetables. In addition, silicone rubber in the textile high-temperature equipment and in the alkali, sodium hypochlorite and hydrogen peroxide concentration of equipment for the sealing material also achieved good results.