Patent ID: 7109381

Claim:
An aldehyde of formula I OHC-(A 11 ) m -Z 11 -(A 11 -Z 12 ) n -(A 13 -Z 13 ) p -A 14 I wherein A 11 is A 12 and A 13 are, independently of one another, A 14 is Z 11 is —CF 2 O—; Z 12 and Z 13 are, independently of one another, a single bond, —CH 2 CH 2 —, —CF 2 CH 2 —, —CH 2 CF 2 —, —CF 2 CF 2 —, —CH═CH—, —C≡C—, —CO—O—, —O—CO—, —CH 2 O—, —OCH 2 — or —CF 2 O—, where at least one of Z 11 , Z 12 and Z 13 is —CF 2 O—; m, n and p are, independently of one another, 0 or 1; q and w are, independently of one another, 0, 1, 2, 3 or 4; and R 11 is H, F, Cl, OCF 3 , OCHF 2 or CF 3 .