Butyl Rubber -

Unlike natural rubber or styrene-butadiene rubber (SBR), which have a highly unsaturated backbone, butyl rubber has very few double bonds. This low level of unsaturation is the secret to its remarkable stability. Because there are few reactive sites available for attack by ozone, oxygen, or chemicals, the material resists degradation far better than most other rubbers.

However, it has a : it swells rapidly in contact with hydrocarbon oils, gasoline, and aliphatic solvents. You should never use butyl rubber in a fuel system or with mineral oil. butyl rubber

), resulting in a material with excellent sealability and stability. However, it has a : it swells rapidly

The demand for butyl rubber is expected to grow in the coming years, driven by increasing demand from various industries, including: The demand for butyl rubber is expected to

It is the material of choice where airtightness and vibration control are critical—most famously in inner liners for tyres and pharmaceutical stoppers.

Isobutylene and a tiny fraction of isoprene are dissolved in methyl chloride, which acts as a diluent. This mixture is cooled to an astonishing . A catalyst (typically aluminum chloride, AlCl₃) is introduced. The reaction is incredibly exothermic, and the low temperature is critical to achieving a high molecular weight. If the temperature rises too much, the polymer chain stops growing.