HNBR provides a significant, and costly, upgrade to NBR.  H-Nanbrol® can upgrade it further.  HNBR may in some uses be let down with N-Nanbrol® to good effect.  Here we want to focus on use of H-Nanbrol® as base for compounds.

Outside testing of H-Nanbrol® based compounds, in comparison tests with carbon black based compounds, reveal improvements of particular note in high temperature performance.  The H-Nanbrol® compound tested below contains 60 phr nano-fill.  Our partners suggested a comparison with their 45 phr total fill compound.  The CB compound contains carbon black and silica.  The hardness of these comparison compounds were between 67 and 85.

CB control compound shown in yellow. Blue is H-Nanbrol® based comparison compound. (Room Temp Results)

CB control compound shown in yellow. Blue is H-Nanbrol® based comparison compound. 100ºC Results)

Tear strengths at room temperature are 26 MPa for the H-Nanbrol® compound and 24 for the CB compound.  When tested at 150ºC, the H-Nanbrol® compound drops to 5.5 and the CB compound to 2.8 MPa.

Similarly, in our partners testing, when aged at 150ºC for 7 days, H-Nanbrol loses some of its’ advantage by percentage, but remains stronger than the tested CB compound.  When aged in air beyond 175ºC, H-Nanbrol retains its’ strength, but loses elongation quickly.

If strong rubber is what you need, or you need your compound strengthened, try H-Nanbrol®.  As an additive, H-Nanbrol® may be used and contains 60 phr nano-fill.  If this fill level is sufficient, it can be used as your base masterbatch with no other polymer or fill needed.

Compounding note:  Cure conditions, post-cure, and formulation variation can result in widely differing values, including compression set for H-Nanbrol® based compounds.