Polyurethane Elastomers

Key features

Polyurethanes just like rubber, are elastomers. They are obtained by reacting isocyanates with polyalcohols. The chain is then extended, which produces flexible materials of desired mechanical strength and durability. The right selection of the quality and quantity of components and the broad array of additives result in a rich palette of products that are a better replacement for rubber products in many dimensions.

Such material has many adventages appreciated in many branches of the modem industry, ever polyurethane elastomer features:
  • high abrasion, cut, and tear resistance,
  • high elongation at rupture,
  • good damping and energy absorption properties,
  • high elasticity over a wide range of hardness values,
  • resistance to ageing, atmospheric conditions,
  • light, UV radiation, and ozone,,
  • good resistance to mineral oil, petrol, acid, base, alcohol, and many other chemicals,
  • good adhesion to metal and other materials,
  • biological resistance,
  • potential antistatic properties

Asmaprene A

Components made from Asmaprene A are very resistant to cuts and resistant to mechanical and chemical factors such as oils, greases, and solvents.

  • Profile: A high-quality cast polyurethane system with good physical properties.
  • Application: The best system for high cut resistance components.
  • Benefits: Perfect physical properties, very resistant to stretching and tearing.
  • Resistance: Very resistant to oil, grease, alcohol, and hydrocarbon solvents.
  • Operating temperature: Continuous operation in dry environment up to 80°C, short-term operation in dry environment up to 100°C. Long-term operation in wet environment up to 50°C.
  • Hardness range: Available hardness ranges from 70.80 to 93 ShA.

Asmaprene B

This system provides a smaller hardness range (greater flexibility of components) and good resistance to grease, oil, and solvents.

  • Profile: Cast system with lower hardness.
  • Benefits: Perfect flexibility and elasticity, perfect metal adhesion, low deformation over time.
  • Resistance: Very resistant to mineral oil, grease, and solvents. Not resistant to hydrolysis.
  • Operating temperature: Continuous operation in dry environment up to 60°C, short-term operation in dry environment up to 80°C.
  • Hardness range: Asmaprene B is available with hardness values from 25 to 60 ShA.

Asmaprene BE

This system has good mechanical properties, abrasion resistance, and flexibility over a wide range of hardness values.

  • Profile: This polyurethane system has very good mechanical properties. Perfect flexibility and elasticity over a wide range of hardness values.
  • Application: Roller coating, components that have to be abrasion resistant while featuring low hardness and good cut resistance.
  • Benefits: Very good mechanical properties. Very abrasion resistant. Very flexible, high adhesion to metal, carbon fibre, and glass fibre.
  • Resistance: Extremely resistant to mineral oil and grease. Minimum swelling upon contact with solvents. Not resistant to hydrolysis.
  • Operating temperature: Continuous operation in dry environment up to 80°C, short-term operation up to 100°C.
  • Hardness range: Hardness range from 40 to 80 ShA.
  • Notes: Primarily used in the hardness range of 50 to 70 ShA because these parameters provide very good abrasion resistance at a relatively soft surface.

Asmaprene L

A high-grade system with good strength and hydrolysis resistance.

  • Application: Coatings used in harsh conditions, such as heavy-industry shafts, that have to endure significant loads, in particular, in wet environment (water and high temperature).
  • Benefits: Perfect strength parameters, resistance to hydrolysis, high shock elasticity, perfect adhesion to metal, polyamide, carbon fibre, and glass fibre, low abrasibility.
  • Resistance: Very resistant to oil and grease. Very good hydrolysis resistance. Bioresistant.
  • Temperatures: continuous operation: 60 to 80°C in dry and wet environment; short-term operation: up to 100°C (dry and wet environment).
  • Hardness range: From 70 ShA to 95 ShA; 60 ShD and 75 ShD

Asmaprene Q

This polyurethane system was developed to provide the best abrasion resistance. It is used mainly in mining operations. This system conforms to all requirements for sifting screens ensuring the best product quality.

  • Profile: his polyurethane system was developed to provide the best abrasion resistance. It is used mainly in mining operations. In addition, it offers increased dynamic properties.
  • Application: Great for sieves and when high abrasion and tearing strength is needed.
  • Benefits: Particularly low abrasibility, good mechanical and dynamic properties, high cut resistance.
  • Resistance:  Potential antibacterial and antistatic properties.
  • Avaliable hardness value: the system can offer 55 to 95 ShA

Amaprene C

A high-grade polyurethane system for components that need to endure high loads, quick wear, hydrolysis, and microbes.

  • Applications: Wear rollers (such as in carbon fibre production), industry wheels. Perfect for sieves and sealing.
  • Benefits: Very high strength over a wide hardness range. Very resistant to UV yellowing and custom modification on request.
  • Resistance: Very resistant to grease, fat, hydrocarbon solvents (such as toluene, heptane, ethyl acetate), alcohols (such as propylene glycol). Antistatic and antibacterial additives are available.
  • Operating temperature: Continuous operation in wet environment up to 60°C, in dry environment up to 80°C. Short-term operation exposed to solvents up to 100°C
  • Hardness range: from 50 to 95 ShA
  • Notes: Short-term food application (dry and wet).


This polyurethane system is used for components operating in harsh conditions, in particular, under high dynamic loads.

  • Profile: Components made with this system have perfect strength parameters. It is the oldest and the best-developed formula sold only by Bayer.
  • Applciation:   It is used as lining for wheels and shafts operating in harsh conditions, exposed to dynamic loads and for flexible elements or clutches that have to provide resistance to abrasion and low friction.
  • Properties: Resistant to high dynamic loads, perfect mechanical properties over a wide temperature range, perfect abrasion resistance, low friction, high fatigue strength, low deformation over a long operating time, constant Young’s modulus in temperatures –20°C to +80°C, perfect metal adhesion. Very resistant to mineral grease and oil, minimum swell from glycol, not resistant to hydrolysis or microbes.
  • Operating temperature:  Continuous operation in dry environment up to 100°C, short-term operation up to 120°C. Retains perfect properties in low temperatures down to –20°C.
  • Hardness range:  from 65 to 93 ShA


This polyurethane system features good fatigue resistance and good quality for money.

  • Application: Abrasion-resistant coatings, polyurethane components under mechanical loads.
  • Benefits: Very good abrasion resistance, good mechanical properties at good elasticity. Good resistance to UV ageing (low yellowing).
  • Resistance: Very good resistance to mineral grease and fat, good resistance to solvents used in cement production. A special microbe-resistant formula is available.
  • Operating temperature: Continuous operation in dry environment from –30 to 60°C, short-term operation up to 80°C
  • Hardness range: from 50 to 90 ShA

We listed examples of substances polyurethane is resistant to below. Details are available with our customer service.

  • Acetylene
  • Ethyl alcohol
  • Methyl alcohol
  • Ink
  • Ammonium nitrate
  • Lead nitrate
  • Silver nitrate
  • Petrol, petroleum ether
  • Bitumen
  • Borax
  • Butane
  • Copper chloride
  • Nickel chloride
  • Potassium chloride
  • Mercury chloride
  • Mercury
  • Ammonium sulphate
  • Copper sulphate
  • Nickel sulphate, 10%
  • NaCl water sol.
  • Ether
  • Dimethyl ether
  • Ethyl phenyl ether
  • Isopropyl ether
  • Ethylene
  • Sodium phosphate, water sol.
  • Glycerol
  • Diethylene glycol
  • Glucose
  • Hexane
  • Adhesive
  • Cresols
  • Boric acid, 10%
  • Oleic acid
  • Potassium sulphate
  • Sodium sulphate, 10%
  • Iron sulphate
  • Carbonic acid
  • Fatty acids
  • Butter
  • Milk
  • Lead acetate, water sol.
  • Cotton seed oil
  • Coconut oil
  • Castor oil
  • Spruce oil
  • Mineral oil
  • Vegetable oil
  • Paraffin
  • Beer
  • Propane
  • Crude oil
  • Barium salts
  • Copper salts, 10%
  • Nickel salts, 10%