VMQ (blue frame) improves vulcanisation rate, compression set, resilience and oil resistance. These elastomers have excellent cold flexibility (can reach temperatures of -50 °C) as well as high thermal resistance (up to 200°C, with special compounding up to 300°C for short periods of time).
They have very good resistance to ageing and attack by oxygen, ozone and sunlight. They also have excellent dielectric and anti-adhesive properties as well as low toxicity and can therefore be used in many food and medical applications since they do not impart odour or taste. In general they have poor tensile strength (<15MPa) and tear resistance compared to conventional rubber.
Resistance to mineral oils (depending on grade) and fuels is moderate however, but they have good resistance to animal and vegetable fats and oils, brake fluid and engine oils. The most admirable property of this polymer is its very wide service temperature range. Silicones also show poor gas impermeability.
