Accelerate processing with Therban® AT

Therban® AT for improved processability

With the Therban® AT grades, research scientists at ARLANXEO have achieved a breakthrough in process technology resulting in outstanding benefits for both processing and product properties. 

Through a unique process, a linear low-Mooney Therban® grade has been developed that avoids problems typically encountered during the mixing and compound processing process.

Better flow, faster mold filling and shorter cycle times with Therban® AT

In comparison to regular HNBR grades, the low Mooney viscosity of Therban® AT leads to better mixing at lower temperatures and therefore to overall cost reduction. 

Rheovulcameter testing (see pict. below) shows the beneficial effect of the significantly improved flow for injection molding. The use of Therban® AT may reduce mold filling cycle times by up to 50%. ALternatively, lower injection pressure or lower temperature can be applied. Extrusion rates can be increased by up to 40%. Benefits can also be observed for compression molding and transfer molding.

Improved sealing force retention with Therban® AT

Due to the low Mooney viscosity of Therban® AT, the use of plasticizers can be reduced or - particularly for crucial compounds - even completely omitted. Thus significantly improved sealing force retention upon aging is achieved.

Discover the advantages of Therban® AT as the raw material of choice, either applied alone or in a blend with another standard or specialty Therban® grade.



The charts show the significant benefits of Therban® AT for injection molding and extrusion. Besides time and energy savings in processing, Therban® AT improves the quality of the finished article. Imroved flow results in smoother surfaces and sharper edges.

Adjustments of recipe and crosslinking agent to enhance vulcanizate properties for Therban® AT applications

The comparison of various compound properties shows only minor differences, which can be handled simply and safely. A possible slightly lower crosslink density can be compensated for by a minor adjustment of the crosslinking agent or through higher filler loading, which in turn leads to a cost advantage.

Therban® AT 3404 
40 phr/50 phr   N330
Standard HNBR
40 phr N330  
Modulus (100%)(MPa)     5.6 / 7.56.5

Ultimate tensile strength (MPa)

26.6 / 27.827.4
Ultimate elongation (%)273 / 256237
Shore A hardness (pts)64 / 6966
Compound Mooney57 / 69101