Product portfolio

of Biermann & Kröger

Rubber types

The company processes all elastomers in all colours, both according to customer specifications and according to relevant recommendations. Elastic mouldings have to be individually developed and cost-effectively produced for a wide variety of tasks.

Rubber type Properties Resistances Temporary area
Natural rubber (NR)
  • Good mechanical properties
  • Good abrasion
  • Good steam properties
  • Low weathering and ozone resistance
  • Medium resistance to seawater, acids and bases
-50° to +80°.
Styrene-butadiene rubber (SBR)
  • Good mechanical properties
  • Good abrasion
  • Good DVR (compression set)
  • Resistant to Freon, Glycol and brake fluids
-40° to +100°.
Ethylene-propylene-diene rubber (EPDM)  
  • very good against acids, alkalis, ozone
  • good against solvents, water, sunlight
  • not resistant against mineral and synthetic oils
-50° up to +120° or 150°°.
Chloroprene rubber (CR)
  • good resistance to ageing and weathering
  • li>hardly flammable
  • >compensated good mechanical properties
  • good against acids, alkalis, sunlight, ozone, water, mineral and synthetic oils
  • sufficient against solvents
-40° to +110°.
Nitrile butadiene rubber, acylnitrile butadiene rubber (NBR)
  • low abrasion
  • favourable ageing behaviour
  • very good mineral oil and fuel resistance
  • resistant to oil, Animal and vegetable fats
  • >resistant to hydrocarbons and gas
  • >good to water
  • sufficient to acids, alkalis, solvents, sunlight, ozone
-40° to +130°.
Hydrogenated nitrile-butadiene rubber (HNBR)
  • Further development of NBR
  • good mechanical properties
  • very good abrasion
  • good against permanent deformation
  • high temperature-, Mineral oil, acid and weather resistance
  • Low gas diffusion
  • Same resistance as NBR, only in very good version
-40° to +150°.
Hydrogenated nitrile-butadiene rubber (HNBR)
  • Further development of NBR
  • good mechanical properties
  • very good abrasion
  • good against permanent deformation
  • high temperature-, Mineral oil, acid and weather resistance
  • Low gas diffusion
  • Same resistance as NBR, only in very good version
-40° to +150°.
Chlorosulfonated polyethylene (CSM)
  • Excellent mechanical properties
  • very good flame and heat resistance
  • very good weather and ozone resistance
  • excellent gas and air impermeability
  • very good against strong oxidants
  • very good against seawater, Saline solutions and alcohols
-35° to +120°.
Acrylate rubber (AEM)
  • excellent gas and air impermeability values
  • low rebound elasticity
  • very good resistance to heat and oil
  • good permanent deformation at high temperatures
  • very good resistance to aliphatic oils, heat, oxygen and ozone
° to +150° C
Epichlorohydrin rubber (ECO)
  • good flame resistance
  • good mechanical properties
  • good elasticity at low and high temperatures
  • excellent air and gas permeability
  • excellent against ozone, Weathering and chemicals
  • resistant to oils, animal and vegetable fats
  • resistant to minerals and glycols
-40° to +135
Silicone rubber (VMQ)
  • very good heat resistance
  • very good elasticity at low temperatures
  • non-toxic in contact with food
  • very good electrical insulating properties
  • good against salt solution and water up to 100 degrees
  • good against weathering, Ozone, minerals, animal and vegetable fats, alcohol and glycole
-40° to +200°
Fluorinated rubber (FPM)
  • excellent chemical and thermal properties against oils and solvents
  • very high resistance against permanent deformation
  • very heat and ozone resistant
  • flame retardant
  • very good against mineral oils, Animal and vegetable fats
  • very good against chlorinated, aromatic and aliphatic solvents and fuels
-40° to +250°

Development of the product portfolio

In the first decades mainly products for daily use were produced. Gradually, industrial products were added.

At the beginning of the 1990s, the product portfolio increasingly shifted to the automotive sector.

Rubber compounds

Up to 1,000 tons of rubber compounds are used for the production of rubber and rubber metal parts in our company per year.

Rubber grades:

  • NR, BR, SBR, EPDM, Silicone (HTV), IR, CSM, ECO, AEM and appropriate copolymers
  • Shore hardness from 35 ShA to 95 ShA

From the idea to the finished part, from the drawing to the tool, from the rubber mixture to the surface finish.

- The Biermann & Kröger rubber goods factory is your partner for all elastomer problem solutions.