2822  Synthetic Rubber (Vulcanizable Elastomers)

Establishments primarily engaged in manufacturing synthetic rubber by
polymerization or copolymerization. An elastomer for the purpose of this
classification is a rubber-like material capable of vulcanization, such as
copolymers of butadiene and styrene, or butadiene and acrylonitrile,
polybutadienes, chloroprene rubbers, and isobutylene-isoprene copolymers.
Butadiene copolymers containing less than 50 percent butadiene are
classified in industry 2821. Natural chlorinated rubbers and cyclized
rubbers are considered as semifinished products and are classified in
industry 3069.