SECTION VII - PLASTICS AND ARTICLES THEREOF; RUBBER AND ARTICLES THEREOF > CHAPTER 40 - RUBBER AND ARTICLES THEREOF > 4002 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 > Styrene-butadiene rubber (SBR); carboxylated styrene-butadiene rubber (XSBR)