IMPACT MODIFIERS | ADDITIVES
Engineering toughness: new impact solutions
Products have been developed to improve impact resistance in a range of compounds, including those that incorporate recycled materials. Chris Saunders finds out more
The global market for impact modifiers is experi- encing robust growth, driven by increasing demand for high-performance, durable materials that can withstand rigorous applications across the automotive, construction, electronics, and packag- ing sectors. Valued at $5bn in 2024, the market is projected to reach $6.9bn by 2029, with a com- pound annual growth rate CAGR of 5.7% (source: Research and Markets). Recent advancements focused on improving mechanical properties, sustainability, and processing efficiencies, have enhanced the versatility of polymer materials. Kraton’s G1643 is a high-flow styrene-ethylene- butylene-styrene (SEBS) copolymer designed for easy processing without an oil or plasticiser which has been deemed suitable for various processing techniques such as extrusion and injection mould- ing. As a highly transparent, non-crystalline elastic
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rubber in dense pellet form, it can be easily dry blended with thermoplastic resins. In addition, it is FDA-approved, ensuring compliance with strict safety and regulatory standards. G1643 exhibits excellent compatibility with multi- ple PP types, including random copolymer PP and homopolymer PP. By enabling blending of RCPP and HPP, G1643 helps reduce formulation costs without compromising performance. Key benefits of G1643 at loading levels lower than 10% include: improved tensile properties with optimised stiffness-toughness balance while maintaining flow, tensile strength, and transparency, with high clarity and low haze; up to 1.5x increase in impact resist- ance; retention of flexibility at extreme tempera- tures; excellent resistance to weathering and high temperatures; and similar trends in performance benefits in neat RCPP modification at room and
Main image: Additives improve impact resistance in plastic products that need to be robust
April 2025 | COMPOUNDING WORLD 47
IMAGE: SHUTTERSTOCK
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