Polychloroprene Latex as a Substitute to Natural Rubber Latex?

Manufacturer: We understand that some manufacturers have switched from natural rubber latex to polychloroprene latex despite the higher price of the latter due to protein allergy problem associated with natural rubber latex.

What are the typical properties of vulcanisates from polychloroprene compared to natural rubber?

John Woon (Senior Latex Consultant): Generally, polychloroprene rubber has the following superior properties, especially when compared to natural rubber:

1) Excellent resistance to ozone attack.
2) Good ageing resistance.
3) Low gas permeability
4) Good chemical resistance especially against non-polar solvents.
5) Good flame retardant.

While the modulus and elongation at break are similar to that of natural rubber, the tensile strength and tear strength are slightly inferior.