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400231Chapter 40

Isobutene-isoprene (butyl) rubber (IIR)

Description

Synthetic rubber and factice derived from oils, in primary forms or in plates, sheets or strip; mixtures of any product of heading 4001 with any product of this heading, in primary forms or in plates, sheets or strip : Isobutene-isoprene (butyl) rubber (IIR); halo-isobutene-isoprene rubber (CIIR or BIIR) : Isobutene-isoprene (butyl) rubber (IIR)

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