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POLYBOND™ and Recycling of Polyolefins
The SI Group POLYBOND™ portfolio of coupling agent allows polyolefin-filled polymer compounds with reinforced physical properties and improved impact strength. With changes in consumer environmental expectations and increased virgin resin prices, costs and market trends require companies to consider incorporation recycled polyolefin resins. Processing difficulties and challenges with overall physical properties arise for any recycler when manufacturing without incorporating virgin resin.
POLYBOND™ coupling agent additives assists various polyolefin-reinforced composites containing wood fiber, glass fiber, cellulose fiber, or mineral-filled applications. During the melting process, plastic tends to phase-separate resulting in structural weakness in the finished material. Incorporating a coupling agent into your formulation can improve the quality of the resulting product in two ways: first by improving bonding at the phase boundaries, and second by better incorporating the pigments and fillers present.
Benefits of POLYBOND™ for Recycled Polyolefin Composites
- Impact & Tensile Strength
- Flexural Strength
- Heat Deflection Temperature
- Filler Dispersion
- Improved Interfacial Adhesion
Explore the various SI Group coupling agent grades below that work best for your resin system and formulation.
| Grade | Resin Type | Modifier | Key Properties |
|---|---|---|---|
| POLYBOND 1001N™ | Polypropylene | Acrylic Acid | Provides improved adhesion of PP to metals and other polar surfaces. |
| POLYBOND 1002™ | Polypropylene | Acrylic Acid | Coupling agent for glass or mica-filled polypropylene composites. Provides good adhesion to metal substrates. |
| POLYBOND 1009™ | Polyethylene | Acrylic Acid | Coupling agent for glass or mica-filled polyethylene. Provides good adhesion to metal substrates. |
| POLYBOND 3000™ | Polypropylene | Maleic Anhydride | Improved strength and hydrolytic stability in filled PP systems. Ideal for tie-layers between multilayer polar and non-polar materials and for improved ink adhesion to non-woven PP. |
| POLYBOND 3002™ | Polypropylene | Maleic Anhydride | Glass fiber, cellulose fiber, or mineral-filled PP. Compatibalizes PP/PA and PP/EVOH blends to improve processability, mechanical properties, and long-term heat aging resistance. |
| POLYBOND 3009™ | Polyethylene | Maleic Anhydride | Improves strength and impact resistance. Provides good adhesion in film and sheet applications. |
| POLYBOND 3029™ | Polyethylene | Maleic Anhydride | Improves tensile, flexural, and impact strength. Lowers water absorption. Ideal in wood and natural fiber-filled PE composites. |
| POLYBOND 3150™ | Polypropylene | Maleic Anhydride | Improved flexural/tensile strength and hydrolytic stability. Ideal for tie-layers between polar and non-polar materials and compatibalizing PA/PP blends. |
| POLYBOND 3200™ | Polypropylene | Maleic Anhydride | Low addition coupling agent for filled PP systems that improves strength and impact performance. Provides good adhesion in film and sheet applications, and compatibalizes PP/PA blends. |
| POLYBOND 3349™ | Polyethylene | Maleic Anhydride | Glass-filled PE composites with high mineral filler levels. Enhanced hydrolytic stability and strength to compatibalize PE/PA blends. Functions as a process aid for halogen-free W&C compounds by improving dispersion and mechanical properties. |
| POLYBOND 7200™ | Polypropylene | Maleic Anhydride | High-efficiency coupling agent for cellulose-filled PP by reducing water uptake and providing higher flexural/tensile strength and impact properties. |
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