SIS is a thermoplastic block copolymer based on styrene-isoprene-styrene,mainly used for HMPSA,modification of plastic&bitum Description:SIS 1221 is a thermoplastic block copolymer based on styrene-isoprene-styrene. The middle block-isoprene, whose structure of lateral methyl and unique micro split-phase structure, determines its superiority while used as adhesives.Advantage:With excellent elasticity, low modulus and good corrugated tightness, high temperature resistance, the pressure sensitive adhesive(PSA) and hot melt adhesive which are made from SIS have properties of good flexibility, adhesive strength,cohesion force, also left no trace with stripping it.Application:Therefore, it can be used in the fields like medical treatment,hygiene, electric insulation, packaging, maskant, marking, etc.

Item	Unit	Typical value
Structure		Linear
Appearance		granule/Powder
Styrene content	%	15
SI content	%	17
Hardness(10second3 )	Shore A	39
Tensile strength	MPa1,2	20
Elongation at break	%	1230
300% elongation modulus	MPa1,2	1.1
MFR(200°C/5KG)	g/10min	8.5
Solution viscosity(25°C4,25%W)	cps	1330

 Note:

1.Form of the products is porous particles,powder or pellet; Packing:20kg/bag, bulk bag

2. Unless otherwise specified, "content" refer to the mass fraction

3.The melt index test conditions: 200°C/5Kg

4.Toluene solution viscosity test conditions: solution concentration of 25%, 25°C.

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sis1221