Dynasol Solprene® 4321 Thermoplastic Rubber (SBS)

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Dynasol Solprene® 4321 Thermoplastic Rubber (SBS)
Categories:	Polymer; Thermoplastic; Elastomer, TPE; Styrenic TPE
Material Notes:	Solprene 4321 is a linear block copolymer of styrene and butadiene, with 32% styrene content, most of it forming polystyrene block, which gives the polymer a thermoplastic behavior. It has a non-staining antioxidant and also available version TNPP-BHT free antioxidant system; FDA approved for use in food contact applications and is essentially gel free with a very clear color. It is presented as free flowing porous crumb making easy its handling and dissolution Uses: Solprene 4321 is used as compounding ingredient for adhesives. The product is an excellent modifier for asphalt applications including self adhesive roofing membrane and sealants. Also is used in thermoplastic injected shoe soles formulations. Main Applications: Roofing Footwear Polymer Modification Adhesives Information provided by Dynasol.
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Physical Properties	Original Value	Comments

Volatiles	<= 0.75 %	ASTM D5668
Viscosity Measure	6.0 cSt	5.23% Toluene solution; NM-300-11
Melt Flow	11 g/10 min @Load 5.00 kg, Temperature 200 °C	ASTM D1238

Chemical Properties	Original Value	Comments
Styrene Content	31 %	Block; NM 202-07
	32 %	on polymer; ASTM D5775

Mechanical Properties	Original Value	Comments
Hardness, Shore A	71	ASTM D2240
Tensile Strength	3.50 MPa	ASTM D412
Elongation at Break	1250 %	ASTM D412

Compliance Properties	Original Value	Comments
FDA	Yes

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PDYNA990 / 132985

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