Special use synthetic rubbers

The most outstanding property of this rubber is the wide spectrum of temperatures where it keeps its elastic properties, only exceeded by Silicone Rubber. The performance temperature range of this rubber can go from -60ºC to 150º C.

Further to the above mentioned, this rubber shows the following properties:

• Excellent resistance to elements and ozone
• Good high temperatures compression set
• Mechanical properties medium values

Their main property is that the main bond does not contents any carbon atom as all the rest of the rubbers do, but it is made up of alternating silicon and oxygen atoms. This property makes the thermal stability much higher than that of its competitors.

Among the advantages of the Silicone Rubbers use, we must point out:

• A wide temperature range, from -100ºC to 200ºC, being able to reach up to 250ºC
• Although the mechanical characteristics are low at room-temperature, they can keep them at high temperature as per their thermal stability, beating those rubbers which show better properties at room-temperature
• They are resistant to elements and ozone
• They are perfect thermal insulation materials
• They do not burn easily and they are auto-extinguishable
• They have a remarkably low gases/fumes permeability

As per their physiological safety and their tolerance to alive organisms, they are ideal to manufacture products which will be in direct contact with food of medical-pharmaceutical items, etc.

Among the cons we could point out:

• Their low resistance to alkalis and acids, as well as to chlorinated hydrocarbons, esters, ketones and ethers

The great heat and chemical agents' resistance are the main property of this rubber. Besides, fluorocarbon rubbers show:

• Great aliphatic, aromatic and chlorinated hydrocarbons resistance
• Great resistance to water and water-steam and to acids and alkalis
• Great resistance to elements and ozone
• As per its halogen contents it is auto-extinguishable

It does not show many disadvantages, but some of them which point out read as follows:

• They have the highest density of the whole of the studied rubbers.
• Low esters and ketones resistance