Usually, SIS adhesive formulations are preferred for labeling, tapes and other Pressure Sensitive applications because of their excellent adhesive properties. But how to increase the productivity and the application speed level when a partial, or full, modification of the whole formula results in additional cost?
Dynasol has recently optimized its SBS (Solprene® 4302) and S-SBR (Solprene® 1217) portfolio to provide a sustainable solution, allowing a decrease in viscosity by partially substituting the SIS content ratio with no additional composition change.
The benefits, both economical and technical, are definitely valuable:
- Formulation cost reduction by partial substitution of SIS capability (Up to 50%)
- Improvement in adhesive performance, thus the expansion of the adhesive application range
- Higher productivity and energy savings by adhesive viscosity reduction
- Enhanced setting speed level for adhesive users
| Ingredient |
Product |
PHR |
| Polymer SIS /SBS (80/20) | SIS / Dynasol S-4302 |
100 |
| Tackifier | C-5 Resin |
185 |
| Plasticizer | Naphtenic oil |
50 |
| A/O | |
3 |

Figure 1: Tape and label HMPSA formulation comparison with partial SIS substitution
Moreover, in the current economical environment where oil price increase is not in favor of the reconstruction of the raw material stocks, formulators tend to shift to terpenic tackifier as an alternative versus C-5 ones.
Solprene® 1217 and Solprene® 4302 in PSA formulations are proven to perform even better, with clear differentiation depending on your requirement.
Solprene® 4302 allows further cost savings with the replacement of 50% of SIS.
| Ingredient |
Product |
PHR |
| Polymer SIS /S-SBR (70/30) | SIS /Dynasol S-1217 or S-4302 |
100 |
| Tackifier | PolyTerpenic |
185 |
| Plasticizer | Naphtenic oil |
50 |
| A/O | |
3 |

Figure 2: Tape and label HMPSA formulation comparison with partial SIS substitution and Terpenic tackifier
Visit the Styrene Block Copolymers Center