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