Some recognized companies that are based in the US who manufacture natural impact modifiers are: Ultra-Poly, Milliken Chemical, and Addivant.
Ultra-Poly is a recycler and compounder based in Portland, Pennsylvania, that deals primarily with polypropylene (PP), polyethylene (PE) and polyvinyl chloride (PVC). Ultra-Poly blends in elastomeric polymers that add impact strength in a PP compound.
Milliken Chemical in Spartanburg, South Carolina develops natural impact modifiers that can improve impact strength without negatively affecting and processability and stiffness and has created a new modifier called DeltaMax.
Addivant, headquartered in Danbury, Connecticut, supplies a natural impact modifier that is designed for recycled acrylonitrile butadiene styrene (ABS) and polycarbonate (PC) to recover lost natural impact and weather-resistant properties.
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