Patent ID: 11873397
Assignee: BOREALIS AG
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 10:
11. The process as defined in claim 10, wherein the propylene butene random copolymer is prepared by a process comprising:
(i) polymerising propylene and butene in a first polymerisation stage in the presence of a single site catalyst to prepare a first propylene butene copolymer having a MFR2 from 0.5 to 20.0 g/10 min and a butene content of 0.5 to 10.0 wt %;
(ii) polymerising propylene and butene in a second polymerisation stage in the presence of said catalyst and said first propylene butene copolymer to prepare said random copolymer.