Patent ID: 11919875
Assignee: RESONAC CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  G | IPC C  G

Claim 4:
5. The fluorine-containing ether compound according to claim 1,
wherein the R3 is any of the following formulae (4) to (6),

—CF2O—(CF2CF2O)c—(CF2O)d—CF2—  (4)

(c and d in the formula (4) indicate average degrees of polymerization and each represents 0 to 30; here, there is no case where c and d become 0 at the same time),

—CF(CF3)—(OCF(CF3)CF2)e—OCF(CF3)—  (5)

(e in the formula (5) indicates an average degree of polymerization and represents 0.1 to 30),

—CF2CF2O—(CF2CF2CF2O)f—CF2CF2—  (6)

(f in the formula (6) indicates an average degree of polymerization and represents 0.1 to 30).