Technical Data

Ronsil Silicone Rubber

Silicone offers the best in temperature range applications, from -62°C (-80°F) to 204°C (400°F) with excellent dry heat resistance. These rings also comply with ASTM and FDA specifications required by food, medical, electrical and filter manufacturers. They offer good resistance from aging, ozone and sunlight. Though silicone has some resistance to moderate chemicals, it is poor against many solvents, oils and concentrated acids. For these applications, you may want to consider fluorosilicone.

Ronsil silicone rubber is a family of highly stable elastomers that offer exceptional performance in adverse environments. These materials function reliably under many conditions that cause organic rubber to fail or deteriorate prematurely. In addition, this family of rubber has properties that can be modified to meet specific needs.

Chemically, silicones are quite different from all other rubber-like materials. Organic polymers are made up of a “backbone” of carbon-to-carbon atoms. These linkages are deteriorated easily by elevated temperatures and the effects of silicon and oxygen atoms. Silicones, however, demonstrate a silicon-oxygen linkage that is the same as that found in other high-temperature materials such as quartz, glass, and sand; hence, the outstanding high-temperature properties of silicones and their general inertness toward many deteriorating effects such as ozone, corona, weathering, and radiation.

Types of Silicone Rubber Available

Ronsil has the technical capability to supply a much wider variety of silicone rubber formulations than can be outlined on our “stock” item data sheets. Most materials can be available in any color or can be color matched when necessary. Reiss invites your interest in:

Ronsil Silicones: Design and Processing Versatility

Silicone

• At a temperature of 90°C (194°F), silicones offer 40 years of life.
• Silicone rubber has a higher tensile strength than most organic elastomers at elevated temperatures.
• Young’s Modulus, or ratio of stress to strain of low temperature, silicone rubber shows very little change down to -73°C (-100°F).
• -73° C (-100°F) to 260°C (500°F) range is normal and can go from -117°C (-178°F) to 316°C (600°F).
• When exposed to direct flame, it burns to a non-conducting ash.
• Silicone rubber, when used in outdoor applications, outperforms EPDM and other organic rubber materials.
• When properly fabricated it does not stain or corrode, it is odorless and tasteless and non-toxic.

Santoprene® Rubber

• Temperature range is from -40°C (-40°F) to 135°C (275°F) in continuous use.
• It has good sealing properties and compression set.
• It has oil and chemical resistance.
• It has good weatherability and is both ozone and UV resistant.
• You can choose a wide range of colors.
• Santoprene® is capable of complex profiles and is weldable.
• It has excellent compatibility with paint and is non-staining.
• There are a wide variety of grades available and it has the ability to be co-extruded with olefinics.
• Santoprene® is often used as a replacement for: Natural Rubber (NR), Polyisoprene (IR), Styrene-Butadiene Rubber, lower-performing Ethylene Propylene Diene (EPDM) and other TPEs.
• Santoprene® is used in applications that require moderate performance characteristics.
• The basic chemical structure is EPDM (partially cross-linked).

Fluorocarbon

Fluorocarbon is also known as Viton® and is a registered trademark of DuPont. Viton® is better than silicone in its resistance to a wide array of chemicals. It has a range in temperature of -29°C (-20°F) to 204°C (400°F), with intermittent exposure up to to 316°C (600°F). This material is excellent against abrasion and oils and does well against ozone, weather and flame. However, it has limited use at low temperatures, -20°C(-4°F) being the limit for flexibility. It is expensive and does not resist ketone solvents. Typically, Viton® is applied in situations requiring resistance to hostile fluids at high temperatures.