Patent ID: 11898006
Assignee: SOLVAY SPECIALTY POLYMERS ITALY S.P.A.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 5:
6. The method according to claim 1, wherein Step (2) leads to a mixture (PFHOC(O)F—OC(O)F) comprising a major amount of any di-fluoroformate compounds of formula (III):
F—C())—O—CH2—RH—[CH2—O—CF2CHF—(CRf1Rf2)a—O—(CRf1Rf2)b—CFHCF2—O—CH2—RH—]n′—CH2—O—C(O)—F; and optionally comprising a minor amount of a compound of formula (II), as above detailed, which is not modified/not reacted in said Step (2), and wherein substantially all hydroxyl groups of compounds of formula (I) are converted into fluoroformate groups.