Styrene-Isoprene-Styrene Block Copolymer (SIS)
SIS is a class of styrene-isoprene-styrene triblock copolymers produced via proprietary sequential anionic polymerization. Most SIS products are of linear structure, with different amount of diblocks. It usually appears as porous particles with outstanding melt processability and thermal stability. SIS is mainly used in hot melt pressure sensitive adhesives, sealants and polymer modification.
SIS Typical Value[1]
| Grade | Unit | 1100 | 1120 | 1170 | 1220 | 1250 | 1250L | 1300 |
| Structure | Linear | Linear | Linear | Linear | Linear | Linear | Linear | |
| Styrene Content | wt. % | 15 | 14 | 15 | 25 | 16 | 16 | 30 |
| Diblock Content | wt. % | 0 | 25 | 66.5 | 25 | 50 | 50 | 0 |
| Melting Flow Rate[2] | g/10 min | 10 | 11 | 6 | 25 | 12 | 12 | 12 |
| Volatiles | wt. % | 0.40 | 0.40 | 0.40 | 0.40 | 0.40 | 0.40 | 0.40 |
| Ash | wt. % | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| T solution viscosity[3] | mPa·s | 1000 | 720 | 800 | 260 | 700 | 900 | 280 |
| Tensile Strength | MPa | 18 | 16 | 3 | 10 | 6 | 6 | 22 |
| Elongation at Break | % | 1050 | 1050 | 1300 | 1050 | 1300 | 1100 | 900 |
| Applications | ||||||||
| Labels & Tapes | √ | √ | √ | √ | √ | √ | ||
| Medical & Hygienic Items | √ | √ | √ | √ | ||||
| Plastic Modification | √ | √ | √ | |||||
Note:Typical value should not be considered as final product specificationsTest condition: 200ºC/5 kg25ºC,25 wt.% tolu solutionPackage: 20±0.2 kg/bag or customer requirement
