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ASTM
D 1418 Designation: CSM
ASTM
D 2000, SAE J200 Type / Class: CE
STANDARD
COLOR: Black
TRADE
NAME:
• Hypalon® (DuPont Dow Elastomers)
RELATIVE
COST: Medium
GENERAL
TEMPERATURE RANGE: -20° to +250° F
Best
known by the trade name Hypalon®, chlorosulfonated
polyethylenes (see Figure 34)
are valued for their attractive combination of physical resilience and
chemical resistance to corrosives,
heat, oil, oxygen, ozone,
and weather. Both heat
resistance and low
temperature flexibility can be augmented through
use of lower amounts of chlorine, but oil
resistance is only fair in such formulations.
Higher chlorine levels lead to greater oil resistance
at the expense of the heat resistance and low temperature
flexibility. CSM can also be compounded to
retain permanent bright colors. On the down side,
CSM suffers from poor compression
set resistance.
CSM
PERFORMS WELL IN:
• Acids
• Alkalis
• Silicone oil & grease
• Water & water solvents
• Refrigerants
(high chlorine compounding lends Freon® resistance)
• Ozone
CSM
DOES NOT PERFORM WELL IN:
• Aldehydes
• Esters
• Ethers
• Hydrocarbons (aromatic,
chlorinated, nitro)
• Ketones
MATERIAL
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