FKM curing
Fluoran UR is an inorganic activator for fluoroelastomer vulcanisation: it contributes to curing consistency and to the final properties of the vulcanisate.
The process
Curing, or vulcanisation, is the process through which the polymer chains of the fluoroelastomer are linked to one another, giving the material its elastic properties and the resistance that characterises it. In FKM this process requires a balanced system of inorganic additives.
This is where Fluoran UR comes in: an inorganic component that acts as an activator and, at the same time, as an acid acceptor.
The function
Fluoran UR is an inorganic activator and acid acceptor designed specifically for the curing of fluoroelastomers. The two functions are not separate: by neutralising the acidic species, the product stabilises the conditions under which curing takes place, and this is reflected directly in the regularity of the cure.
The ultrafine particle size — 0% above 80 μm — ensures optimal reactivity and a uniform distribution of the activator throughout the compound.
The effects
The high active content and minimal impurities of Fluoran UR translate into measurable effects on the finished product.
Full Fluoran UR data sheetRepeatable curing rate, batch after batch.
Enhances the thermal stability of the vulcanised rubber.
Contributes to the final mechanical properties of the part.
More predictable and controllable curing conditions.
FAQ
It is an additive that takes part in the curing process of fluoroelastomers, helping to regulate vulcanisation and stabilise its conditions. De Grandi's Fluoran UR is an inorganic activator that also performs the function of acid acceptor within the same compound.
They are two distinct functions which, in Fluoran UR, coexist in a single product. As an acid acceptor the product neutralises the acidic species released during vulcanisation; as an inorganic activator it helps to regulate the curing process. By neutralising acidity it stabilises the conditions under which curing takes place, and this is reflected in the regularity of the cure.
A high-purity activator such as Fluoran UR contributes to a consistent curing rate from batch to batch, and improves the thermal stability and mechanical integrity of the vulcanised rubber. These are the direct effects of its high active content and minimal impurities.
Because it determines reactivity and uniformity. Fluoran UR has a controlled particle profile, with 0% of particles above 80 microns and only 0.5% above 43 microns: this fineness ensures optimal reactivity and a uniform distribution of the activator throughout the compound.
De Grandi produces Fluoran UR at its plant in Tromello, in the province of Pavia, Italy. For enquiries, samples and technical documentation you can contact the company on +39 0382 868402 or at info@degrandisrl.it.
