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are an aliphatic viscosifying hydrocarbon resin used widely in tyre rubber compounding. Latou te le o aofia ai le anne ma maua ai se fetaui lelei ma paʻu natura ma ituaiga uma o paʻu shanthec (e aofia ai SBR, er, o loʻo iai foʻi, everc, o loʻo i ai ma le tagata faʻale-natura). In rubber Compounding ,they can be used as: viscosifier,reinforcement agent, softener, filler, etc.
