SBR rubber

Styrene-Butadiene rubber, or SBR, is by far the commonest kind of synthetic rubber anywhere in the world. SBR is today the current name for a group of polymerized compounds made under a number of brands in many countries and available with a wide range of different quality features.

Properties

  • Vulcanized styrene-butadiene rubber products must be strengthened by extenders if their mechanical properties have to be almost as good as those of natural rubbers. They are also less elastic and flexible at low temperatures; however, they perform better against abrasion, high temperatures and ageing.
  • Heat resistance: up to a maximum of 100°C. After long exposure to high temperatures, SBR becomes harder but this is not followed by softening as in the case of natural rubber.
  • Resistance to low temperatures: up to -50°C..
  • Electrical properties: Good insulating effectiveness as long as rubber mixtures have the proper composition.
  • Gas permeability: quite high, yet lower than that of hevea rubber; SBR is not recommended when permeability is an issue.
  • Resistence to chemicals:not particularly effective.


Applications

The tire industry accounts for almost two thirds of the world’s production of SBR. What is left is used for many different articles, for instance for rubber soles, cable sheaths, gaskets (e.g. for glycol-based brake fluids), hose, cylinder linings, belt conveyors, floorings, rubber mats, household articles and so forth.



   

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