SBR (styrene-butadiene rubber, buna SB, cariflex S)

SBR is a synthetic rubber, obtained by polymerization of styrene and butadiene. Its properties are similar to those of natural rubber, however it is distinguished from it by improved wear resistance, and is therefore often used instead of natural rubber. Also widely used is a mixture of natural and synthetic rubber.

Usage:

gaskets, inner tubes, chewing gum. The emulsion of latex and SBR is used for the coating of paper.

Advantages:

• very good tensile strength,
• elasticity,
• great wear resistance.

Disadvantages:

• poor resistance to changing weather conditions, mineral oils and gasoline,
• loses at low temperatures.

Temperature resistance: from - 30 °C to 100 °C.

Hardness: 35 to 90 Shore A.