... product applies to the mixing process in rubber type pressure sensitive adhesive , acts as ... such as natural rubber, butadiene rubber ( NR ) ( BR ), ( IR ) synthesis of CIS polyisoprene rubber, styrene-butadiene rubber ( SBR, ... block or random ), amyl phenyl rubber ( SIR, block or random ), butyl rubber, chloroprene rubber, butyl rubber, ethylene-propylene rubber ...