| 摘要 |
Esters having the general formula <IMAGE> where X is a halogen, the sum of the atomic masses of the halogen atoms on the phenyl ring is at least 90, n is 1-5, Y is an alkyl, ether, ester, aldehyde, ketone, acetal, ketal, cyano, or nitro substituent, m is 0-2, Z is an ester linkage -OCO- or -CO2-, R' is a haloalkyl group containing at least one F atom and containing halogen atoms in place of greater than 60% of the hydrogen atoms of the corresponding unhalogenated alkyl group, with the sum of the atomic masses of the halogen atoms on said R' group being greater than 135 and the compound as a whole containing at least two types of halogen atoms, and p is 1-3, constitute high density flotation fluids and lubricants for inertial instruments such as gyroscopes and accelerometers, and for electrical contacts. Synthetic methods are disclosed for production of such fluids from available starting materials.
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