| http://www.w3.org/ns/prov#value | - such as butadiene, chloroprene, isoprene, 1,3-pentadiene and the like, liquid copolymers such as NBR, SBR and the like obtained by copolymerization of monomers such as acrylonitrile, styrene and the like, which are copolymerizable with these diene compounds, such that the diene compound becomes the main component, various modification products thereof (maleic modification products, boil oil modif
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