Patent ID: 11919977
Assignee: ARLANXEO SINGAPORE PTE. LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 14:
15. A process for the preparation of a chlorinated copolymer comprising at least the step of reacting a copolymer comprising
i) structural units derived from at least one isoolefin monomer and
ii) structural units derived from at least one multiolefin monomer with hypochloric acid and or dichlorine oxide;
wherein the chlorinated copolymer has a chlorine content from 0.1 to 4 wt.-%,
wherein the structural units derived from isoprene are at least partially chlorinated to form exo-methylene and endo-Cl and cis-endo and trans-endo and microstructure units such that the microstructure Index X being the ratio of mol-% (exo-methylene+endo-Cl)/mol-% (cis-endo and trans-endo) as measured by 1H-NMR is from 1.50 to 3.30.