What are Silicone Elastomers

Silicone elastomers are formulated by combining reactive, linear molecules with a cross-linking agent and reinforcement materials to achieve favorable mechanical characteristics such as elasticity, absorption, and tear strength.

Chemical structure

Silicone elastomers are produced through a combination of linear polymers, reinforcing agents, a crosslinker, and a catalyst. The type of elastomer formed depends on the viscosity and nature of the primary linear molecule used, as well as the processing temperature. Three common types of elastomers produced are Heat Cured Rubber (HCR), Liquid Silicone Rubber (LSR), and Room Temperature Vulcanization (RTV). To enhance their properties, these elastomers can be reinforced with mineral fillers like silica, alumina, calcium carbonate, or silicone resins. The choice of crosslinking reactions (radical, condensation, or addition) depends on the desired processing requirements. Additionally, various additives can be incorporated into the final composition of the elastomer to achieve specific characteristics such as color, rheology, or pot life, as well as meet performance standards like electrical insulation or conduction, heat transfer, fire retardancy, chemical adhesion, or mold release.

Silicone elastomer properties

Silicone elastomers are utilized in high-performance applications, particularly in challenging environments where other polymeric materials would fail. Components manufactured from silicone elastomer rubber ensure extended durability and dependability, even when subjected to a wide range of temperatures (-50 °C to 250 °C) or extreme outdoor conditions (humidity, UV, Ozone). Their excellent dielectric properties and thermal resistance make them particularly suitable for insulating and protecting electronic equipment, including high voltage lines. These products retain their elastomeric properties, including high elongation before reaching the breaking point and/or strong resistance to tearing (essential for molds, modeling and replication, kitchenware, etc.). Silicone elastomers are also safe for human contact and can withstand the high temperatures necessary for sterilization processes, making them ideal for medical applications (skin contact, medical devices, long-term implants, etc.).

Related products

Liquid silicone rubber

Heat cured rubber



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