Synthos SPRINTAN™ SLR 4630 Solution Styrene Butadiene Rubber (S-SBR)

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Synthos SPRINTAN™ SLR 4630 Solution Styrene Butadiene Rubber (S-SBR)
Categories:	Polymer; Thermoset; Rubber or Thermoset Elastomer (TSE); Styrene Butadiene Rubber
Material Notes:	Composition: SPRINTAN® SLR-4630 – Schkopau is manufactured by anionic solution polymerization using an organo-lithium initiator. In relation to solid rubber the grade is extended with 37.5 parts of TDAE oil which complies with the EU Directive 2005/69/EC for use in tyre application. The product has a medium styrene/high vinyl micro structure and a typical glass transition temperature of -29°C. SPRINTAN® SLR-4630 – Schkopau is partially Si-coupled and contains a non-staining stabiliser. Application: SPRINTAN® SLR-4630 – Schkopau provides an excellent balance between good wet traction and low rolling resistance for silica- and/or carbon black- filled tyre tread compounds for summer -, winter -, and all season tyres. The product can also be used in high-quality technical rubber articles. Test Formulation (based on IRB7 black): Polymer – 137.5 parts by mass Stearic Acid - 1.0 parts by mass Zinc Oxide - 3.00 parts by mass Carbon Black IRB 7 – 68.75 parts by mass Sulphur - 1.75 parts by mass Accelerator (CBS) - 1.38 parts by mass Stearic Acid – 1.0 parts by mass
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Physical Properties	Original Value	Comments

Density	0.940 g/cc
Volatiles	0.10 % @Treatment Temp. 105 °C, Time 3600 sec	5 g in hot air oven; ASTM D5668
Mooney Viscosity	55 @Temperature 100 °C	[MU] ML 1+4; ASTM D1646
Ash	0.30 %	ASTM D5667

Chemical Properties	Original Value	Comments
Styrene Content	25 %	Bound; ASTM D5775

Mechanical Properties	Original Value	Comments
Hardness, Shore A	58.8	ASTM D2240
Tensile Strength at Break	19.7 MPa @Treatment Temp. 145 °C, Time 2100 sec	Cure; ASTM D412
Elongation at Break	470 %	ASTM D412
300% Modulus	0.0126 GPa @Strain 300 %	ASTM D412
Rebound	18 %	Resilience; ISO 4662

Thermal Properties	Original Value	Comments
Glass Transition Temp, Tg	-28.0 °C	HR 10 K/min, half height

Descriptive Properties
Composition	27.4%	Total Extractables; ASTM D5774
	61.7%	Vinyl content
Rheometer	11.0 min	t_c (50), ASTM D5289
	18.8 min	t_c (90), ASTM D5289
	2.9 dNm	ML, ASTM D5289
	2.9 dNm	MH, ASTM D5289
	7.7 min	t_s2, test temperature 160°C; ASTM D5289

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