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Japanese Tier 1, Mitsui Chemicals ink agreement for production, marketing of high-performance impact modifier

Polyamide/grafted polyolefin elastomer-based additive is particularly effective for impact modification in foamed PP parts.

Stephen Moore

May 31, 2017

1 Min Read
Japanese Tier 1, Mitsui Chemicals ink agreement for production, marketing of high-performance impact modifier

Toyota-affiliated Japanese Tier 1 auto parts supplier Toyota Boshoku is teaming with fellow Japanese company Mitsui Chemicals to commercialize and market a high-performance impact modifier for use in polypropylene (PP) compounds employed in automotive as well as industrial and consumer goods applications. The technology was developed by Toyota Boshoku, who has agreed to license it to Mitsui Chemicals to further market development.

Foamed door trim employing the hybrid additive is less likely to cause injury to vehicle occupants if a collision occurs.

This latest initiative is an offshoot of previous R&D reported in 2013 by Toyota Boshoku and Toyota Motor's innovation arm Toyota Central R&D Labs., Inc. It turns out that the impact modifier is based on a combination of polyamide (PA) 11 and Mitsui Elastomers’ Tafmer M maleic anhydride-grafted polyolefin elastomer (POE) that is manufactured at an 8000-tonnes/yr plant in Singapore.

Addition of the new additive to PP increases Charpy impact strength substantially without sacrificing rigidity to any great extent. The additive is particularly effective at inhibiting sharp edge fracturing in vehicle collisions for components such as foamed door trim, which is 30% lighter than conventional materials.

Charpy impact strength approaching 80 kJ/m2 has been achieved compared with around 50 kJ/m2 for polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) alloys and less than 20 kJ/m2 for conventional block PP.

About the Author(s)

Stephen Moore

Stephen has been with PlasticsToday and its preceding publications Modern Plastics and Injection Molding since 1992, throughout this time based in the Asia Pacific region, including stints in Japan, Australia, and his current location Singapore. His current beat focuses on automotive. Stephen is an avid folding bicycle rider, often taking his bike on overseas business trips, and is a proud dachshund owner.

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