ADDITIVES | IMPACT MODIFIERS
products are mostly used in film and sheet applica- tions, pipes, boards, and various household items. The company says it can also create customised formulations.
Kraton G1643 high-flow SEBS copolymer used in a blend of random copolymer PP and homopolymer PP improves tensile properties with optimised stiffness-toughness balance while maintaining transparency Source: Kraton Polymers
lower temperatures. Another benefit beyond impact modification is that the flexural modulus remains relatively unaffected up to 5wt% loading level, ensuring that the material retains its structural integrity. Kraton says these characteristics make G1643 an ideal material for applications demand- ing durability, flexibility, and impact resistance while maintaining transparent product design. All Kraton products can be made with up to 100% ISCC PLUS Certified Renewable content based on a mass balance approach allowing for a drop-in for existing fossil-based SBC uses and lowering product carbon footprint. Kraton’s Mailiao certification expands its portfolio of certified SBC manufacturing sites beyond Europe and North America into Asia, where its Taiwan facility can now produce up to 100% ISCC PLUS-certified renew- able SBC under the CirKular+ ReNew Series.
New China plant Testament to the strong demand trend in impact modifiers is the ongoing success of Chinese company Jindaquan, which recently opened a new factory in Huizhou, Guangdong Province. The new facility boasts a total of ten production lines including four which have been moved from its old premises in Shenzhen. Jindaquan has been engaged in the research and production of impact modifiers for more than 23 years. Its key product is the Argiope range, which is broadly divided into granule form, transparent granule form, powder form, and liquid form impact modifiers. The company says in many cases adding a dosage of only 0.2-4% could help boost impact strength and toughness by 40-60%. At present, Jindaquan
48 COMPOUNDING WORLD | April 2025
Another company highlighting collaboration with customers to fulfill their individual require- ments is Saco AEI Polymers, which has com- pounding capabilities in both the US and UK. Its team has developed a series of maleic anhydride grafted additives sold under the Armidan and Linxidan tradenames. One of the most popular examples is Armidan NT7410, a high-performance product for PA 66. A key property is its high-melt flow which helps achieve excellent dispersion and morphological properties, while the low glass transition temperature ensures it achieves good impact properties not just at room temperature, but down to -40° C. It is easy to process and, depend- ing upon desired performance targets, can be used at loading levels from 8-25%. The company also produces a wide range of coupling agents used to improve the mechanical properties of filled systems. The Linxidan family covers a broad range of resins including PP and PE and have been designed to improve adhesion between a non-polar resin matrix and a polar filler, such as wood flour, glass fibre, or halogen-free flame retardants. The result of this increased adhesion is improved mechanical properties like notched impact, tensile strength, and flexural modulus, which translates to enhanced impact resistance. Tisan Engineering Plastics produces maleic anhydride grafted polymers under the Olebond brand name. Grafting on polymer backbone is achieved with a unique processing technology and Olebond is produced as an effective impact modifier for the polymers, says the company. Olebond 7403 IM grades are used as impact modifiers for PA. While Olebond 7403 IM-C grade achieves enhanced low-temperature impact proper- ties and outstanding performance at low tempera- tures Olebond 7403 IM-Z shows good performance in PA 6 and PA 66 and Olebond 7403 IM-R is designed for normal room temperature conditions. Tisan says that due to the high degree of functional- ity of maleic anhydride, a small amount of Olebond is sufficient to create a positive effect and the increase the impact resistance values of polyamides.
Circularity trend A major issue with recycled plastic materials is that they often have inferior properties compared to their virgin counterparts. Additives are therefore required to help the material meet required
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