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Regular Butyl & Halogenated Butyl Rubber

Butyl rubber (IIR) is a synthetic rubber, a copolymer of isobutylene with isoprene. Providing excellent air retention, it is widely used for tire inner liners among other applications.

X_Butyl® BB 2030 Bromobutyl Rubber
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 32 MU ISO 289 / ASTM D 1646 ML (1+8) 125 °C
Bromine Content 1,80 wt % Internal Method
Antioxidant non-staining > 0,03 wt % Internal Method
X_Butyl® BB 2040 Bromobutyl Rubber
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 39 MU ISO 289 / ASTM D 1646 ML (1+8) 125 °C
Bromine Content 1,80 wt % Internal Method
Antioxidant non-staining ≥ 0,03 wt % (*)
Ash Content ≤ 0,7 wt % ISO 247 / ASTM D 5667
Volatile Content ≤ 0,7 wt % ISO 248 / ASTM D 5668
X_Butyl® BB X2 Bromobutyl Rubber
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 46 MU ISO 289 / ASTM D 1646 ML (1+8) 125 °C
Bromine Content 1,80 wt % Internal Method
Antioxidant non-staining ≥ 0,03 wt % (*)
Ash Content ≤ 0,7 wt % ISO 247 / ASTM D 5667
Volatile Content ≤ 0,7 wt % ISO 248 / ASTM D 5668
X_Butyl® CB 1240 Chlorobutyl Rubber
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 38 MU ISO 289 / ASTM D 1646 ML (1+8) 125 °C
Chlorine Content 1,25 wt % Internal Method
Antioxidant non-staining ≥ 0,03 wt % (*)
Ash Content ≤ 0,5 wt % ISO 247 / ASTM D 5667
Volatile Content ≤ 0,5 wt % ISO 248 / ASTM D 5668
X_Butyl® RB 301 Regular Butyl Rubber
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 51 MU ISO 289 / ASTM D 1646 ML (1+8) 125 °C
Unsaturation 1,85 %(Mol) (*)
Antioxidant non-staining ≥ 0,03 wt % (*)
Ash Content ≤ 0,3 wt % ISO 247 / ASTM D 5667
Volatile Content ≤ 0,3 wt % ISO 248 / ASTM D 5668
X_Butyl® RB 402 Regular Butyl Rubber
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 33 MU ISO 289 / ASTM D 1646 ML (1+8) 125 °C
Unsaturation 2,25 %(Mol) (*)
Antioxidant non-staining ≥ 0,03 wt % (*)
Ash Content ≤ 0,3 wt % ISO 247 / ASTM D 5667
Volatile Content ≤ 0,3 wt % ISO 248 / ASTM D 5668

Nitrile Butadiene Rubber

Nitrile-butadiene rubber (NBR) is a copolymer made from butadiene and acrylonitrile. NBR is essential for technical rubber products that need to be resistant to mineral oils, service fluids, and greases in automotive applications and machinery.

Krynac® XL 3375 VP Pre-Crosslinked
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 75 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Acrylonitrile Content 33,0 wt % ISO 24698