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Regular & halogenated butyl rubber

The X_Butyl® product family contains a broad range of regular butyl rubber products and halogenated butyl rubber products.

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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
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
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 % Internal Method
Ash Content ≤ 0,7 wt % ISO 247 / ASTM D 5667
Volatile Content ≤ 0,7 wt % ISO 248 / ASTM D 5668
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
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

Butadiene Rubber

The BR polymer family contains polybutadiene rubbers which are divided into different categories according to their polymerization process and application field.

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Neodymium BR
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 63 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Cis 1,4 Content > 96 %
Lithium BR
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 45 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Cis 1,4 Content 38 %
Neodymium BR
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 37 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Oil Content 27,3 wt % ISO 1407
Cis 1,4 Content > 96 %
Lithium BR
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 54 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Solution Viscosity 165 mPa.s Internal Method
Cis 1,4 Content 36 % Internal Method
Trans 1,4 Content 53 wt % Internal Method
Vinyl Content 11 wt % Internal Method
Color < 7,5 Internal Method
Neodymium BR
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 44 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Cis 1,4 Content > 96 %
Cobalt BR
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 53 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Cis 1,4 Content > 96 %
Cobalt BR
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 40 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Cis 1,4 Content > 96 %
Neodymium BR
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 37 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Oil Content 27,3 wt % ISO 1407
Cis 1,4 Content > 96 %
Cobalt BR
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 43 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Cis 1,4 Content > 96 %
Neodymium BR
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 44 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Cis 1,4 Content > 96 %
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Emulsion Styrene Butadiene Rubber

The Buna® SE product group comprises the general purpose emulsion styrene-butadiene rubbers (E-SBR) which is one of the most important types of synthetic rubber. Emulsion Styrene Butadiene Rubber is the most widely used rubber in the world, representing about 40% of the synthetic rubber market,...

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Oil-extended E-SBR
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 53 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Bound Styrene 40,0 wt % ASTM D 5775
Oil Content 27,2 wt % ASTM D 5774
Oil-extended E-SBR
Oil-free E-SBR
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 52 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Bound Styrene 23,5 wt % ASTM D 5775
Oil-free E-SBR
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 53 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Bound Styrene 23,5 wt % ASTM D 5775
Oil-extended E-SBR
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 50 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Bound Styrene 23,5 wt % ASTM D 5775
Oil Content 27,2 wt % ASTM D 5774
Oil-free E-SBR
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 49 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Bound Styrene 23,5 wt % ASTM D 5775
Oil-extended E-SBR
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 49 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Bound Styrene 23,5 wt % ASTM D 5775
Oil Content 27,2 wt % ASTM D 5774
Oil-extended E-SBR
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 51 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Bound Styrene 23,5 wt % ASTM D 5775
Oil Content 27,2 wt % ASTM D 5774
Oil-extended E-SBR
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 55 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Bound Styrene 40,0 wt % ASTM D 5775
Oil Content 27,2 wt % ASTM D 5774

Ethylene Propylene Diene Rubber

Keltan® has the broadest portfolio of premium EP(D)M grades in the world. The versatility of Keltan® elastomer, high product quality, high supply reliability and high service level enables high performance for our customers, their products and industrial solutions.

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Low Mooney
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 33 MU ISO 289 / ASTM D 1646 ML (1+4) 125 °C
Molecular Weight Distribution Narrow Internal Method
Ethylene Content 55 wt % ASTM D 3900
ENB Content 2,3 wt % ASTM D 6047
Low Mooney
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 54 MU ISO 289 / ASTM D 1646 ML (1+8) 100 °C
Molecular Weight Distribution Medium Internal Method
Ethylene Content 56 wt % ASTM D 3900
ENB Content 11,0 wt % ASTM D 6047
Medium Mooney
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 48 MU ISO 289 / ASTM D 1646 ML (1+4) 125 °C
Molecular Weight Distribution CLCB Internal Method
Ethylene Content 62 wt % ASTM D 3900
ENB Content 8,7 wt % ASTM D 6047
Oil Content 100 PHR ISO 1407
High Mooney
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 65 MU ISO 289 / ASTM D 1646 ML (1+4) 125 °C
Molecular Weight Distribution CLCB Internal Method
Ethylene Content 44 wt % ASTM D 3900
ENB Content 9,0 wt % ASTM D 6047
High Mooney
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 80 MU ISO 289 / ASTM D 1646 ML (1+4) 125 °C
Molecular Weight Distribution CLCB Internal Method
Ethylene Content 66 wt % ASTM D 3900
ENB Content 5,0 wt % ASTM D 6047
Very high Mooney
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 60 MU ISO 289 / ASTM D 1646 ML (1+8) 150 °C
Molecular Weight Distribution CLCB Internal Method
Ethylene Content 44 wt % ASTM D 3900
ENB Content 9,0 wt % ASTM D 6047
Medium Mooney
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 43 MU ISO 289 / ASTM D 1646 ML (1+4) 125 °C
Molecular Weight Distribution CLCB Internal Method
Ethylene Content 55 wt % ASTM D 3900
ENB Content 2,3 wt % ASTM D 6047

Functionalized & Standard S-SBR and Block Co-Polymers

The Buna® S-SBR product family contains a wide range of solution styrene butadiene rubber products which are defined into Buna FX, Buna VSL, Buna SL and Buna BL.

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Functionalized S-SBR (Buna FX)
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 65 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Styrene Content 34 wt % Internal Method
Oil Content 27,3 wt % Internal Method
Vinyl Content 32 wt % Internal Method
Functionalized S-SBR (Buna FX)
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 63 MU ISO 289 / ASTM D 1646 ML (1+4) 125 °C
Styrene Content 34 wt % Internal Method
Oil Content 75 PHR 27,3 wt % Internal Method
Vinyl Content 32 wt % Internal Method
Standard S-SBR (Buna SL)
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 45 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Styrene Content 18 wt % ASTM D 5775
Oil Content 27,3 wt % ASTM D 5774
Standard S-SBR (Buna SL)
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 45 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Styrene Content 25 wt % ASTM D 5775
Standard S-SBR (Buna VSL)
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 62 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Styrene Content 26 wt % Internal Method
Oil Content 27,3 wt % Internal Method
Vinyl Content 44,5 wt % Internal Method
Standard S-SBR (Buna SL)
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 75 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Styrene Content 18 wt % Internal Method
Oil Content 13 wt % ASTM D 5774
Standard S-SBR (Buna VSL)
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 80 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Styrene Content 38 wt % Internal Method
Oil Content 27,3 wt % Internal Method
Vinyl Content 24 wt % Internal Method
Standard S-SBR (Buna VSL)
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 66 MU ISO 289 / ASTM D 1646 ML (1+4) 125 °C
Styrene Content 38 wt % Internal Method
Oil Content 27,3 wt % Internal Method
Vinyl Content 30 wt % Internal Method
Standard S-SBR (Buna VSL)
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 50 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Styrene Content 38 wt % Internal Method
Oil Content 27,3 wt % Internal Method
Vinyl Content 25 wt % Internal Method
Standard S-SBR (Buna VSL)
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 50 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Styrene Content 26 wt % Internal Method
Oil Content 27,3 wt % Internal Method
Vinyl Content 44,5 wt % Internal Method
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