SIS Thermoplastic Elastomer
Styrene-isoprene-styrene (SIS) thermoplastic elastomer made by sequential anionic polymerisation, in linear or star structure, combining triblock and diblock content.
Key properties
- Diblock content 1–75% (grade dependent)
- Styrene content 15–29 wt%
- Melt flow rate 9.5–23 g/10min
- Excellent tack and cohesive strength
- Easy processing
Technical data & grades
| Grade | Grade 1 | Grade 2 | Grade 3 | Grade 4 | Grade 5 | Grade 6 |
|---|---|---|---|---|---|---|
| Structure | Linear | Linear | Linear | Linear | Linear | Star |
| Diblock content, % | ≤ 1 | 25 | ≤ 1 | 50 | 50 | 75 |
| Styrene content, wt% | 16 | 15 | 29 | 16 | 16 | 18 |
| Melt flow rate, g/10min | 9.5 | 11 | 11.5 | 11 | 14 | 23 |
Typical values, not a specification. Grade numbers are Chemistis internal references; commercial grade names and the batch certificate of analysis (CoA) are shared at quotation stage.
Applications
Industries
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