Patent ID: 11898007
Assignee: COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH
Field: Organic fine chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 5:
6. A process for ring opening polymerization (ROP) of propylene oxide with initiators to produce PEPO having a molecular weight between 200 to 1000 Mw using the catalyst according to claim 1 comprising the steps of:
(a) taking 375 ppm to 7500 ppm DMC catalyst, initiator, and propylene oxide (PO) in a Teflon lined reactor and running the ROP reaction at a temperature in the range of 8 to 150° C. and pressure in the range of 1 bar to 20 bar for a time period in the range of 1 to 24 h to obtain a mixture;
(b) cooling down the reactor to room temperature in the range of 8 to 39° C. after completion of reaction; and
(c) separating unreacted PO from produced PEPO followed by vacuum drying at a temperature in the range of 40° C. to 70° C. to obtain 80 to 98.7% PEPO;
wherein the DMC catalyst ppm value is based on the combined amounts of initiator and propylene oxide.