Krynac® - MC - Medium Cure


Krynac® MC grades are multi-purpose NBR grades and suitable for a huge variety of applications. They work at medium vulcanization rates, while Perbunan® FC grades feature faster and Krynac® SC grades slower vulcanization rates (see Fig. 3, page7). Compared to their vulcanization rates the majority of other products available in the market with similar acrylonitrile content and mooney viscosity (crosslinking system: sulfur + sulfenamide) is similar. Therefore Krynac® MC grades can easily be used in many different applications.


Range of Krynac® MC grades      
Acrylonitrile content       26 % - 49 %                  
Viscosity (ML 1+4/100 °C)30 - 110 MU1)

1)Unmassed (ISO289-1)


Krynac® MC grades feature a balanced property profile:

  • The polymers benefit from a high quality standard and good consistancy
  • With the proper composition, compounds offer good processability and processing-safety
  • Vulcanizates benefit from a high level of properties and good compression set (in each case depending on the compound composition, especially the crosslinking system)