Anti-static additive for conductive vinyl ester with maintained durability and color
TUBALL graphene nanotubes (also known as single wall carbon nanotubes) are used as a conductive filler to provide anti-static properties to vinyl-ester systems. They outperform widely used carbon black in their ability to preserve or even enhance mechanical properties of thermoset materials along with providing the required conductivity. Due to ultra-low working dosages in comparison with carbon black or carbon fiber, graphene nanotubes allow a wider color palette, leading to enhanced aesthetics of final products.
Anti-static agents: traditional vs TUBALL™
OCSiAl has developed the TUBALL MATRIX line of user-friendly concentrates for easy handling of nanotubes at a standard production facility without required changes in formulation. The anti-static masterbatch is efficient at very low loadings starting from 0.1% of the overall compound.
TUBALL™ MATRIX meets key technical requirements
|Parameter||Ammonium compounds||Carbon black||TUBALL™ MATRIX|
|Working dosage, wt.%||0.2–4.0||4–12||0.1–0.5|
|Resistivity range, Ω/sq||1011–108||1011–105||1011–104|
Influence on mechanical performance
|small negative||strong negative||none|
|Influence on rheology||none||strong negative||acceptable|
|Application via spray technology||possible||challenging||possible|
|Dust formation during production||none||high||none|
|Resistivity independent of humidity||no||yes||yes|
|Stable resistivity over time||no||yes||yes|
Key benefits of graphene nanotubes in vinyl-ester systems include:
- Uniform conductivity – guaranteed protection from ‘hot spots’
- Permanent anti-static properties independent of humidity
- Preserved mechanical properties, or even enhancement of some parameters
- Flexibility in coloring the product thanks to ultra-low working loading of nanotubes
- Retained density and viscosity of the original compound
- Simple adaptation to existing production process and formulation
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