Materials technologies: AU [polyurethane], CR [neoprene] and CSM [chlorosulfonated polyethylene]
At DP Seals we pride ourselves on being able to provide specialist advice in selecting and developing exactly the right blend of materials to meet a vast range of performance requirements.
This information is only a guide to the more common materials, their primary characteristics and uses. The relationship between material, product performance and blend options is complex.
| Material | Polyurethane | Neoprene | Chlorosulfonated Polyethylene |
| Description | Highest abrasion resistance of all elastomers combined with excellent oil, fuel and solvent resistance and high ozone and oxygen resistance. Excellent low temperature properties and high tensile/tear strength. | Good heat, flame, ageing and weather resistance. Moderate chemical and oil resistance. Long flex life. Poor resistance to aromatic hydrocarbons. | Outstanding oxygen, ozone and weather resistance and excellent resistance to corrosive chemicals, oils and grease combined with excellent abrasion resistance, tensile and elongation over a very wide temperature range. |
| Cost | £££ | ££ | ££ |
| Hardness: Shore A (Hint) | 40-100 | 30-90 | 50 - 90 |
| Tensile Strength (1000psi) | 0.8 - 8.0 | 0.5 - 3.5 | 0.5 - 3.5 |
| Tear Resistance | Excellent | Good | Fair |
| Impact Resistance | Excellent | Good | Good |
| Compression Set (Method B, %) | 10 - 45 | 20 - 60 | 35 - 80 |
| Electrical Resistance (Ω/cm2 | 0.3*1010 - 4.7*1013 | 2*1013 | 1*1014 |
| Low Temperature (°C) | -40 | -50 | -40 |
| High Temperature (°C) | 100 | 100 | 100 |
| intermittent High (°C) | 120 | 130 | 120 |
| Ozone (protected) | Excellent | Good | Excellent |
| Weather and Sunlight | Good | Good | Excellent |
| Gas Permeation | Fair | Good | Excellent |
| Water | Good | Good | Good |
| Acid/Base - Dilute | Fair | Good | Excellent |
| Acid/Base Concentrated | Poor | Fair | Fair |
| Solvent - Aliphatic | Fair | Good | Good |
| Solvent - Aromatic | Poor | Poor | Fair |
| Oils and Gasoline | Good | Good | Good |
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