Butyl rubber IIR - Butyl rubber

Isobutylene isoprene rubber, also known as butyl rubber, is abbreviated as IIR. It is a synthetic rubber produced by the polymerization of isobutylene or copolymerization of isobutylene. It usually contains a small amount of isoprene or buta-1,3-diene. Sulfur or nitroso compounds are commonly used for its vulcanization. Due to its high isobutylene content, it has a wide range of applications and is highly valued in the vulcanization industry. It is characterized by high resistance to aging and limited gas permeability. Additionally, it has high resistance to acids and bases, as well as mechanical and electrical insulating properties.

What does the abbreviation IIR stand for?

The abbreviation IIR comes from the English language and stands for isobutylene isoprene rubber. In Polish, it is known as kauczuk izoprenowo-izobutenowy, or alternatively, kauczuk butylowy.

Thanks to a small amount of isoprene, butyl rubber has capabilities in the vulcanization industry. Its thermal resistance is about 140 degrees Celsius. It achieves flexibility at low temperatures - even down to -40 degrees Celsius. It effectively dampens vibrations.

It is also characterized by high chemical resistance to:

• Impact of ozone and aging by atmospheric conditions and weather fluctuations
• Vegetable and animal fats and greases
• Ozone
• Oxidizing chemicals
• Inorganic acids
• Solutions of bases
• Salt solutions
• Polar solutions - alcohols, esters, and ketones
• Oils and greases

However, it is not resistant to fuels and chlorinated hydrocarbons.

Rubbers with a chlorine (CIIR) and bromine (BIIR) admixture stand out for their high processing properties. They do not age even with low air permeability.

Thanks to its properties, butyl rubber is commonly used in construction and vulcanization. In construction, butyl rubber is valued for its resistance to ozone and gas impermeability. Its ability to dampen vibrations and provide electrical insulation is also useful.

It is most frequently used in the production of tires, inner tubes, and rubber components. These include shock absorbers, rubber cushions, seals, and isolators. Due to its high-temperature resistance, it is commonly used in the production of hoses for hot liquids and steam. Butyl rubber is also used in the manufacturing of gas-tight membranes, medication closures, and heaters. Butyl tapes are also produced using this material.

Butyl tapes are popular sealants that effectively fill gaps, dampen vibrations, and shock. They are useful for securing damaged components and protecting against moisture.

Trade names under which butyl rubber is known:

• Enjay-Butyl
• Hycar-Butyl
• Petrolex-Butyl
• Polysar-Butyl
• Soca-Butyl
• Esso-Chlorobutyl
• Esso-Brombutyl