Elvaloy® PTW and Elvaloy® AC Resins for Polyester (PET & PBT) Impact Resistance and Toughening


Elvaloy® enhances impact strength while maintaining other properties needed in electrical and electronic connectors, as well as a wide range of other industrial and consumer products.

Elvaloy® PTW provides super-tough impact resistance while improving hydrolysis resistance of PBT compounds for higher product quality. It also can enable increased productivity, while achieving improved impact strength in cast PET-based sheet applications.

For the most demanding PBT impact resistance requirements, Elvaloy® PTW provides super-toughness in virgin and glass fiber reinforced compounds.

PBT Impact Resistance:  Improved impact strength of PBT with Elvaloy® PTW

Graph 1: Improved impact strength of PBT with Elvaloy® PTW
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DuPont™ Elvaloy® PTW terpolymers and Elvaloy® AC acrylate copolymers enhance PBT and PET resins as an impact modifier, nucleating agent, processing aid to improve melt flow, and as a hydrolysis stabilizer. Examples of DuPont polymer modifiers used in polyester include the following:

Product Grade
Elvaloy® PTW X X X Super tough
Elvaloy® PTW X X X Compatibilizing polyesters with PE or PP
Elvaloy® 4170 X   X Super toughening
Elvaloy® AC X   X Moderate toughening, high flow
Elvaloy® 8920   X   Crystallization promoter for PET