Patent ID: 6894187

Claim:
A compound selected from the compounds of the following formulae: CF 3 CF 2 COO(CH 2 ) 4 OCOCF 2 CF 3 (3-12), CF 3 CF 2 COOCH 2 CH (CH 3 )O(CH 2 ) 4 OCOCF 2 CF 3 (3-13), CF 3 CF 2 COO(CH 2 ) 2 O(CH 2 ) 2 OCOCF 2 CF 3 (3-14), CF 3 CF 2 CF 2 OCF(CF 3 )COOCH 2 CH(CH 3 )O(CH 2 ) 5 OCOCF(CF 3 )—OCF 2 CF 2 CF 3 (3-15) CF 3 CF 2 COO(CH 2 ) 2 O(CH 2 ) 2 OCH(CH 3 )CH 2 OCOCF 2 CF 3 (3-16), CF 3 CF 2 COOCF 2 CF 2 CF 2 CF 2 OCOCF 2 CF 3 (4-12), CF 3 CF 2 COOCF 2 CF (CF 3 ) OCF 2 CF 2 CF 2 CF 2 COCF 2 CF 3 (4-13), CF 3 CF 2 COOCF 2 CF 2 OCF 2 CF 2 OCOCF 2 CF 3 (4-14), CF 3 CF 2 CF 2 OCF(CF 3 )COOCF 2 CF(CF 3 )OCF 2 (CF 2 ) 3 —CF 2 OCOCF (CF 3 )OCF 2 CF 2 CF 3 (4-15), CF 3 CF 2 COO(CF 2 ) 2 O(CF 2 ) 2 OCF(CF 3 )CF 2 OCOCF 2 CF 3 (4-16), and FCOCF 2 O(CF 2 ) 2 OCF(CF 3 )COF (5-16).