Synthos BUNA™ SB 1502 Schkopau Cold Polymerized Emulsion Styrene Butadiene Rubber (E-SBR)

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Synthos BUNA™ SB 1502 Schkopau Cold Polymerized Emulsion Styrene Butadiene Rubber (E-SBR) (discontinued **)
Categories:	Polymer; Thermoset; Rubber or Thermoset Elastomer (TSE); Styrene Butadiene Rubber
Material Notes:	BUNA™ SB 1502–Schkopau is manufactured by cold polymerization using mixed rosin acid/fatty acid soaps. A non-discoloring stabilizer is added during the production process. Application: BUNA™ SB 1502–Schkopau is a general purpose rubber. It can be processed in all sectors of the tire and rubber industry. BUNA™ SB 1502–Schkopau is mainly used for the production of light-colored rubber articles which can also be applied in the food industry Synthos acquired the synthetic rubber business from Trinseo in 2021.
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Physical Properties	Metric	English	Comments

Density	0.930 g/cc	0.0336 lb/in³
Volatiles	0.30 %	0.30 %	1 hr at 105°C in a hot air oven, 5 g sample; ASTM D5668
Mooney Viscosity	49.7 @Temperature 100 °C	49.7 @Temperature 212 °F	MU, ML 1+4; ASTM D1646
Ash	0.040 %	0.040 %	ASTM D5667

Chemical Properties	Metric	English	Comments
Styrene Content	23.4 %	23.4 %	Bound; ASTM D5775

Mechanical Properties	Metric	English	Comments
Tensile Strength at Break	27.5 MPa	3990 psi	Cure: 45 min at 145°C; ASTM D412
Elongation at Break	450 %	450 %	ASTM D412
300% Modulus	16.8 MPa @Strain 300 %	2440 psi @Strain 300 %	ASTM D412

Descriptive Properties
Organic acid	5.7 percent		ASTM D5774
Rheometer	15.1 min		tc(90), ASTM D5289
	2.6 dNm		ML, ASTM D5289
	21.2 dNm		MH, ASTM D5289
	5.5 min		ts2, 160°C, ASTM D5289
	9.0 min		tc(50), ASTM D5289
Test Formulation	1 Part		Stearic acid, ASTM D3185-1A
	1 Part		Accelerator (TBBS), ASTM D3185-1A
	1.75 Parts		Sulfur, ASTM D3185-1A
	100 Parts		Polymer, ASTM D3185-1A
	3 Parts		Zinc oxide, ASTM D3185-1A
	50 Parts		Carbon black IRB8, ASTM D3185-1A

**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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PDWST236 / 142445

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