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Process for the preparation of 5-sulfonylpropyl- or 5-sulfonylpropylidene-5H-dibenzo- [a, d] -cycloheptenes or -5H-dibenzo- [a, d] -10,11-dihydrocycloheptenes.
Process for the preparation of a rubbery elastomer consisting of an optionally vulcanized linear copolymer of an unsaturated endomethylene compound and ethylene or an aliphatic α-alkene or both.