Patent ID: 6858752

Claim:
A fluorinated polyvalent carbonyl compound selected from the group consisting of a compound of the following formula (7), a compound of the following formula (8), a compound of the following formula (9), a compound of the following formula (1-1a), and a compound of the following formula (1-1b): CH 3 CH[OCOCF(CF 3 )OCF 2 CF(CF 3 )OCF 2 CF 2 CF 3 ]CH 2 OCOCF(CF 3 )OCF 2 CF(CF 3 )OCF 2 CF 2 CF 3 (1-1a) CF 3 CF[OCOCF(CF 3 )OCF 2 CF(CF 3 )OCF 2 CF 2 CF 3 ]CF 2 OCOCF(CF 3 )OCF 2 CF(CF 3 )OCF 2 CF 2 CF 3 (1-1b).