prov:value
| - ene, isoprene, chloroprene, 1,3-pentadiene, cyclopentadiene, 1,4-hexadiene and ethylidene norbornene; copolymers of ethylene, butene-1 and at least one diene, which can be conjugated or non-conjugated, such as butadiene, isoprene, chloroprene, 1,3-pentadiene, cyclopentadiene, 1,4-hexadiene and ethylidene norbornene; copolymers of propylene, butene-1 and at least one diene, which can be conjugated
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