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Additives for the Efficient Incorporation of Biobased Fillers in PP-Based Formulations
Partial substitution of non-renewable materials with biobased alternatives.
Biobased materials are polymer composites in which part of the traditional, oil-derived polymer content is replaced by renewable components such as natural fibers or fillers (such as starch, hemp, rice hulls, or wood). Because polyolefins are hydrophobic and natural fillers tend to absorb moisture, a coupling agent is essential to ensure strong interfacial bonding. This prevents issues such as mechanical failure, poor surface appearance, and excessive water uptake in the final compound.
At AddiCo, we have developed specific coupling agents for different polyolefins.
For polypropylene-based composites, use AddiCo 5907. For polyethylene, use AddiCo 5707. For HIPS-based composites, AddiCo 5707-H is recommended.
The following example shows how AddiCo 5907 effectively reacts with hydroxyl groups in lignocellulosic or cellulosic materials:
A polypropylene surface modified with lignocellulosic material.
The epoxy groups in AddiCo 5907 effectively react with hydroxyl groups in natural fibers such as sisal or agave.
*Agave fiber was kindly supplied by Biosolutions.
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