Synthos SPRINTAN™ SLR 4502-SCHKOPAU Solution-Styrene Butadiene Rubber (S-SBR)

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Synthos SPRINTAN™ SLR 4502-SCHKOPAU Solution-Styrene Butadiene Rubber (S-SBR)
Categories:	Polymer; Thermoset; Rubber or Thermoset Elastomer (TSE)
Material Notes:	Composition: SPRINTAN™ SLR 4502-Schkopau is manufactured by anionic solution polymerization using an organo-lithium initiator. The product has a medium styrene/medium-high vinyl microstructure and a typical glass transition temperature of -35 °C. SPRINTAN™ SLR 4502-Schkopau is partially coupled and bears a generation 2 functionalization for improved polymer/filler interaction with carbon black as well as with silica. A non-staining stabilizer is added in the production. Application: SPRINTAN™ SLR 4502-Schkopau provides outstanding rolling resistance/abrasion for fuel efficient tire treads based on silica and/or carbon black. The medium-high-vinyl micro structure ensures excellent miscibility in blends with BR and makes SPRINTAN™ SLR 4502-Schkopau applicable in summer-, all-season- , as well as in HP/UHP tires. Synthos acquired the synthetic rubber business from Trinseo in 2021.
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Physical Properties	Original Value	Comments

Density	0.930 g/cc
Volatiles	0.23 %	1 hr at 105°C in a hot air oven, 5 g sample; ASTM D5668
Mooney Viscosity	57 @Temperature 100 °C	MU, ML 1+4; ASTM D1646
Ash	0.080 %	ASTM D5667

Chemical Properties	Original Value	Comments
Styrene Content	20 %	SM, (FTIR)

Mechanical Properties	Original Value	Comments
Hardness, Shore A	64.3	ASTM D2240
Tensile Strength at Break	22.2 MPa	Cure: 45 min at 145°C; ASTM D412
Elongation at Break	370 %	ASTM D412
300% Modulus	0.0173 GPa @Strain 300 %	ASTM D412
Rebound	43.1 %	ISO 4662

Thermal Properties	Original Value	Comments
Glass Transition Temp, Tg	-35.0 °C	DSC (HR 10 K/min, half height)

Descriptive Properties
Rheometer	11.5 min	tc(50), ASTM D5289
	17.2 min	tc(90), ASTM D5289
	2.5 dNm	ML, ASTM D5289
	22.9 dNm	MH, ASTM D5289
	7.3 min	ts2, 160°C, ASTM D5289
Test Formulation	1 Part	Stearic acid
	1.05 Parts	Accelerator (TBBS)
	1.75 Parts	Sulfur
	100 Parts	Polymer
	3 Parts	Zinc oxide
	5 Parts	Aromatic oil
	52.5 Parts	Carbon black IRB8
Vinyl content	54 percent	SM, (FTIR)

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PTRINS9109 / 197579

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