Neoprene chlorobutadiene
Neoprene rubbers are homopolymers of chloroprene (chlorobutadiene) and are among the earliest synthetic rubbers used to produce seals. CR has good aging properties in ozone and weather environments, along with abrasion resistance and resistance to bending cracks.
CR is not effective in environments with aromatic and oxygenated solvents. Neoprene can be formulated for operating temperatures from -40°C to + 110°C (the -40°F to + 230°F). Most elastomers are either resistant to attack from exposure to petroleum-based lubricants or to attack by oxygen. Neoprene, however, has limited resistance to both.
CR Applications
This, combined with a wide temperature range and reasonable cost, explains its use in many sealing applications for refrigerants such as Freon® and ammonia. CR is resistant to refrigerants, ammonia, Freon® (R12, R13, R21, R22, R113, R114, R115, R134A), silicone oils, water, ozone, vegetable oils, alcohols and low-pressure oxygen. CR has a very low resistance to mineral oils.
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