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Butyl Rubber (IIR, CIIR, BIIR)

Category	Polymer , Thermoset , Rubber or Thermoset Elastomer (TSE)
Manufacturer
Trade Name
Port	Ningbo port,China
Trade Terms	FOB, CFR, CIF
Payment Terms	L/C, T/T, Western Union
Download PDF	Butyl Rubber (IIR, CIIR, BIIR).pdf
Price	EMAIL US sales@lookpolymers.com

Material Notes:

Butyl rubber is a copolymer of isoprene (minor) and isobutylene. Chlorobutyl (CIIR) and Bromobutyl (BIIR) contains 1.2% of the halogen. The halogen addition changes the cure characteristics and can improve adhesion.IIR rubber resists degradation by fats/oils/greases and ozone and other strong oxidizing chemicals. IIR rubber is attacked by petrochemical solvents including aromatics.

Physical Properties	Metric	English	Comments
Density	1.15 - 1.35 g/cc	0.0415 - 0.0488 lb/in³	Compounded

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	35 - 95	35 - 95	Depends on compounding
Tensile Strength, Ultimate	17.0 MPa	2470 psi	Compounded Tire
Elongation at Break	400 - 800 %	400 - 800 %

Thermal Properties	Metric	English	Comments
Maximum Service Temperature, Air	120 °C	248 °F
Minimum Service Temperature, Air	-25.0 °C	-13.0 °F

Electrical Properties	Metric	English	Comments
Dielectric Strength	24.0 kV/mm	610 kV/in

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