Name: Chlorosulfonated Polyethylene CSPE-40 (Hypalon-type)
Brand: Coatingsink
SKU: chlorosulfonated-polyethylene-cspe40
Availability: InStock

Question 1

What are the key advantages of CSPE coatings over conventional rubber or alkyd coatings?

Accepted Answer

CSPE provides outstanding resistance to ozone, UV, oxidizing chemicals (chlorine, peroxides), and a wide range of acids and alkalis — far superior to natural rubber or standard alkyd coatings. This makes it the material of choice for water treatment tank linings, industrial roof membranes, and marine topside coatings. DuPont's Hypalon was the benchmark product, now replaced by generic CSPE grades like CSPE-40.

Question 2

How is CSPE-40 formulated into a coating?

Accepted Answer

CSPE-40 chips are dissolved in aromatic solvents (xylene/toluene) or ketone/aromatic blends at 15–25% concentration. The solution is pigmented, and a metal oxide crosslinker (e.g., MgO, PbO, or litharge) is incorporated for vulcanization cure. Two-component systems with accelerators (MgO + thiurams) are used for industrial linings requiring fast cure and maximum chemical resistance.

Form	white/cream chips
Sulfur Content	1.0–1.5%
Chlorine Content	29–32%
Specific Gravity	1.17–1.21
Mooney Viscosity (ML1+4 100°C)	35–50

Chlorosulfonated Polyethylene CSPE-40 (Hypalon-type)

Specifications

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