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VESTENAMER®: The Smart Rubber Additive for Efficient Extrusion

Boost flow, surface quality and control in cable, hose and profile extrusion.

VESTENAMER® is a polyoctenamer (TOR) rubber additive and processing aid that helps rubber compounders make extrusion more controllable and efficient. By improving flow and surface quality while stabilizing the green strength, it supports higher throughput and consistent production - without overcomplicating your formulation work. In profile extrusion, these effects translate into smoother surfaces, improved dimensional stability, and lower energy demand during processing.

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VESTENAMER® Rubber Additive for Hose Production
VESTENAMER® Rubber Additive for Profile Extrusion

Key benefits of VESTENAMER® in Mechanical Rubber Goods

  • Improved flowability & controllability of rubber compounds in extrusion (helps with difficult, low‑plasticizer recipes).
  • Smoother, more uniform extrudate surfaces with greater dimensional stability.
  • Higher throughput potential (often double‑digit increases at higher screw speeds).
  • Lower specific energy consumption and reduced melt pressure at the die.
  • Higher green strength/hardness at ambient temperature, reducing or even avoiding deep‑cooling steps for hoses. 

VESTENAMER® for Cable Extrusion

Challenge: Maintaining surface quality and extrusion stability - without compromising electrical and physical properties - while keeping compounding energy in check.

How VESTENAMER® helps: As a rubber processing aid, it reduces mixing energy and can simplify mixing steps thanks to lower output temperatures, while delivering clean, smooth extrudate surfaces. These processing benefits come without impairing the electrical or physical performance of the vulcanizate. (Broad surface‑quality and flow benefits are also documented in profile extrusion.)

What you can expect

  • Better flow behavior and surface finish on the line. 
  • Potentially fewer mixing steps due to lower compound temperatures after mixing (helps overall efficiency).
  • Consistent processing window that supports downstream cable insulation/sheathing quality.
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VESTENAMER® for Hose Extrusion

Challenge: Controlling layer adhesion and fabric penetration, while avoiding time‑ and energy‑intensive deep cooling to build green strength.

How VESTENAMER® helps: VESTENAMER® 8012 reduces compound viscosity and improves flowability, enabling controllable hose extrusion (e.g., brake hoses). At processing temperatures, layer adhesion and fabric penetration improve; at ambient temperature, its crystallinity boosts green strength/hardness, often allowing a significant reduction or elimination of sub‑zero cooling.

What you can expect

  • More controllable extrusion of plasticizer‑lean or plasticizer‑free compounds.
  • Improved fabric penetration and interlayer bonding in reinforced hoses. 
  • Higher green strength at room temperature - less reliance on deep cooling.
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VESTENAMER® for Profile Extrusion

Challenge: Achieving throughput, dimensional stability, and a smooth surface - especially with very hard profiles - without driving up energy demand.

How VESTENAMER® helps: In profile extrusion, VESTENAMER® is a state‑of‑the‑art rubber additive to stabilize the raw profile, enhance flowability, and improve surface smoothness and dimensional stability. At higher screw speeds, compounds with VESTENAMER® frequently show double‑digit throughput gains while lowering specific energy consumption, melt pressure, and extrudate swell. These benefits are especially valuable in extremely hard profiles (e.g., profile bases for clamping profiles).

What you can expect

  • Smoother surfaces and better dimensional control at the die.
  • More throughput at comparable temperatures and lower melt pressure. 
  • Reduced extrudate swell for easier geometry control. 
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How VESTENAMER® helps Compounders

VESTENAMER® promotes better dispersion of fillers/additives and lowers compound viscosity as dosage increases, which improves flow behavior and machine runnability. Its crystallinity contributes to higher green hardness/strength in the unvulcanized state - already at room temperature - which supports shape retention before curing (especially useful in hoses).

Ready to optimize your extrusion?

Request a trial sample or talk to our technical team about your EPDM or NBR compound and target outcomes (throughput, surface finish, cooling reduction).

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Products

VESTENAMER® 8012

Rubber with unique properties.

VESTENAMER® 8012

Rubber with unique properties.

VESTENAMER® CS10

Rubber with unique properties.

FAQ's

Yes. VESTENAMER® is compatible with all rubber types with saturated or unsaturated hydrocarbon chains, making it suitable for EPDM, NBR and similar systems.

No negative impact has been observed. In cable extrusion, for example, VESTENAMER® improves surface quality without impairing physical or electrical properties of the final vulcanizate.

The viscosity-lowering effect depends on dosage:

  • Low additions initially improve filler distribution (better homogeneity) and may slightly increase viscosity.
  • Higher additions clearly reduce viscosity and enhance flowability, especially in EPDM and NBR hose compounds.

Yes. It enables controllable processing of difficult, plasticizer-lean or plasticizer-free compounds, improving flowability and machine runnability. This is particularly valuable for hose extrusion and hard profile compounds.

Yes. In profile extrusion, VESTENAMER® reduces specific energy consumption and melt pressure at the die, especially at higher screw speeds. 

In hose extrusion, it may also reduce the need for energy-intensive sub‑zero cooling by increasing green strength at room temperature.

Yes. Double‑digit percentage increases in linear and mass flow rates have been reported - especially at higher screw speeds in profile extrusion.

Its inherent crystallinity increases hardness and green strength of unvulcanized compounds even at ambient temperature - a benefit that continues during cooling. This reduces or eliminates the need for deep freezing stages.