What is a silicone rubber

August 22, 2011
silicone rubber (SiliconeRubber) is a molecular bond of both inorganic and organic nature of the polymer elastic material, its primary key elements silicon and oxygen atoms from the alternate form (- -Si-o-Si-) silicon-oxygen bond energy of 370kj/mol, than the average rubber carbon – carbon bond energy 240KJ/mol with much larger, which is silicone with high thermal stability of the main reasons one. Silicone rubber has the most extensive range of operating temperature (-100 ~ 350oC), high and low temperature performance, also has excellent thermal stability, electrical insulation, weather resistance, ozone resistance, air permeability, high degree of transparency , tear strength, excellent heat resistance and excellent adhesion, flow and mold release, special silicone rubber also has excellent oil resistance, solvent resistance, high resistance to radiation and the use of low temperature characteristics. rumen8.com-start it, investors started a good helper
Silicone rubber is a cross-linked by the oxygen and silicon into the polymer made from a unique synthetic elastomer. It is the perfect balance of mechanical properties and chemical properties, which can meet many of today demanding application requirements.
organic silicon material mainly by the silicone oil, silicone rubber, silicone resins and silicone [url = www.kks.net.cn] silicone composition of four major categories of gifts alkane coupling agent, silicone rubber is a silicone products, the largest output, one of the most widely used category of products. Its main component is a high molecular weight linear polysiloxane. As the Si-O-Si bond is the basic form of bond type, the main connection methyl silicon atom, the side chain into a very small amount of unsaturated groups, intermolecular forces is small, spiral-shaped molecular structure of methyl outward arrangement and the freedom to rotate, so after curing silicone rubber with excellent resistance to high temperature, weather, water-repellent, electrical insulation, physical inertia, etc., in the defense industry, health care, industrial and agricultural production and people daily life to get a wide range of applications.
silicone rubber in the following areas of excellence:
high and low temperature stability of the inert (odorless) transparent, easy to color
hardness range W ,10-80 Shore hardness
chemical resistance properties
electrical resistance compression
In addition to the excellent performance, and conventional organic elastomers compared to silicone rubber is also particularly vulnerable to manufacturing. Easy flow of silicone rubber, which can lower energy consumption in the case molding, rolling, extrusion. Easy processing means high production efficiency.
silicone rubber can be provided in the form below:
rubber: This ready-to-be, depending on your processing equipment and end-use for color and catalysis.
-based materials: the same type of silicone polymer containing reinforcing filler. And rubber-based material can be further mixing pigments and additives, the formation of rubber, and other colors to meet your manufacturing requirements.
liquid silicone rubber (LSR): This two-component liquid rubber system by entering the appropriate pump injection molding equipment, and then heat cured into a molded rubber parts.
fluorine rubber and silicone rubber base material: fluoro silicone rubber to keep many of the key properties, in addition, it also has excellent resistance to chemicals, fuel and oil resistance.
main properties of silicone rubber and application
its curing temperature silicone rubber, can be divided into high-temperature (heating) and RTV curing type and type two categories, high-temperature plastic mainly used in the manufacture of silicone rubber products, and plastic at room temperature mainly as a bonding agent, potting materials or mold.
(1) hot-vulcanized silicone rubber (HTV) heat vulcanized silicone rubber (HTV) silicone products is the most important category, methyl vinyl silicone rubber (VMQ) is the most H TV The main varieties, commonly known as high-temperature plastic.
methyl vinyl silicone rubber (gum) is a colorless, odorless, non-toxic, no mechanical impurities jelly, raw rubber reinforcement according to need to add the appropriate agent, control agent structure , mixing with the curing agent additives, and then heated compression molding or extrusion molding, and then by Sec sulfide made of a variety of products. The products have excellent electrical insulation resistance, arc, corona, spark strong, waterproof, moisture, impact resistance, resistance to shock, with physical inertia, permeability and other properties.
mainly for aerospace, instrumentation, electronics, marine, metallurgy, machinery, automotive, medical and health departments can do a variety of shapes of seals, gaskets, pipes, cables, and do human organs, blood vessels, breathable membrane and rubber molds, precision casting release agents.
(2) at room temperature vulcanizing silicone rubber (RTV)
RTV silicone rubber molding and processing generally include condensed into two categories.
plus plastic molding temperature is linear with a vinyl polysiloxane-based gel to hydrogen siloxane as crosslinking agent, in the presence of a catalyst at room temperature to occur in the cross linking reaction and become elastic. It has good heat resistance, water repellency, electrical insulation, and because the active end of the introduction, it has excellent mechanical properties, especially in the tensile strength, relative elongation and tear strength has been significantly on the the increase. It is suitable for a variety of curing methods, such as radiation vulcanization, peroxide vulcanization molding curing and processing, widely used in heat, moisture, electrical insulation, high strength silicone rubber products and so on.
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