Kraton® G1657 M (SEBS) Linear Block Copolymer

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Kraton® G1657 M (SEBS) Linear Block Copolymer
Categories:	Polymer; Thermoplastic; Elastomer, TPE
Material Notes:	Kraton G1657 M is a clear, linear triblock copolymer based on styrene and ethylene/butylene with a polystyrene content of 13% . It is supplied from North America in the physical form identified: Kraton G1657 MS - supplied as a dusted pellet Kraton G1657 MO - supplied as a dusted pellet Region: Asia Pacific, Europe, Japan, North America, and South America Uses: Kraton G1657 M is used as a modifier of bitumen or thermoplastics and in compound formulations. It may also find use as an ingredient in formulating adhesives, sealants and coatings. Applications: Adhesives, Sealant and Coatings; Compounding and Personal Hygiene; Impact Modification; Medical; Packaging and Polymod; and Personal Care
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Physical Properties	Original Value	Comments

Specific Gravity	0.900 g/cc	ASTM D4025
Volatiles	<= 1.0 %	KM 04
Brookfield Viscosity	1200 - 1800 cP @Temperature 25.0 °C	20% Toluene solution; BAM 922
Melt Flow	22 g/10 min @Load 5.00 kg, Temperature 230 °C
Ash	0.020 - 0.12 %	For G1657 MS, Silica dusted; BAM 908

Chemical Properties	Original Value	Comments
Diblock Content	30 %

Mechanical Properties	Original Value	Comments
Hardness, Shore A	47	10 seconds. Typical values on polymer compression molded at 150°C (300°F).; ASTM D2240
Tensile Strength, Ultimate	23.44 MPa	Typical properties based on film cast from toluene solution.; ASTM D412
Elongation at Break	750 %	Typical properties based on film cast from toluene solution.; ASTM D412
300% Modulus	0.00241 GPa @Strain 300 %	film cast from toluene solution.; ASTM D412

Descriptive Properties
Content	Dust, O	0.45-0.75%, KM 1029
	Non-staining phenolic antioxidant	0.03-0.10%, KM 08
	Polystyrene	12.3-14.3%, KM 03, Measured on the polymer before hydrogenation
	Total Extractables	<1.5%, KM 05
Styrene/Rubber ratio	13/87

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PKRA0270 / 49087

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