氯磺化聚乙烯橡胶密封圈-Chlorosulfonated Polyethylene CSM O Ring Seals
Chlorosulfonated Polyethylene (CSM)
The polyethylene polymer contains additional chlorine and
sulfur groups. Chlorine gives the material resistance to
flame and mineral oil and also improves the cold flexibility.
Heat resistance
• Up to 121°C (250°F).
Cold flexibility
• Down to approximately -29°C (-20°F).
Chemical resistance
• Many acids.
• Many oxidizing media.
• Silicone oil and grease.
• Water and water solvents.
• Ozone, aging and weathering resistance.
Limited compatibility
• Low molecular aliphatic hydrocarbons (propane, butane,
fuel).
• Mineral oil and grease.
• Limited swelling in aliphatic oils (ASTM oil No. 1).
• High swelling in naphthene and aromatic base oils
(IRM 902 and IRM 903 oils).
• Polar solvents (acetone, methyl ether, ketone, ethyl
acetate, diethyl ether, dioxane).
• Phosphate-ester based fluids.
Not compatible with:
• Aromatic hydrocarbons (benzene).
• Chlorinated hydrocarbons (trichloroethylene).
2.2.10 Epichlorohydrin (CO, ECO)
Epichlorohydrin is available in two types: the homopolymer
(CO) and the copolymer (ECO). Both CO and ECO
have good resistance to mineral oils, fuels and ozone. The
high temperature resistance is good. Compression set and
the tendency to corrode metal sealing faces increase at
150°C (302°F). ECO has a good cold flexibility. CO has a
high resistance to gas permeability.
Heat resistance
• Up to approximately 135°C (275°F).
Cold flexibility
• Down to approximately -40°C (-40°F).
Chemical resistance
• Mineral oil and grease.
• Aliphatic hydrocarbons (propane, butane, fuel).
• Silicone oil and grease.
