The present invention relates to novel compounds containing fluorinated end groups, to the use thereof as surface-active substances, and to compositions comprising these compounds.

The present invention relates to a process for the preparation of fluorinated compounds, to novel compounds containing fluorinated end groups, to the use thereof and to compositions comprising novel compounds containing fluorinated end groups.

The present invention relates to a process for the preparation of fluorinated compounds, to novel compounds containing fluorinated end groups, to the use thereof and to compositions comprising novel compounds containing fluorinated end groups.

A hydrofluoroolefin compound represented by the following general formula (II): Formula (II) where Rf is a linear, branched, or cyclic perfluoroalkyl group having 1-6 carbon atoms, and optionally comprises at least one catenated heteroatom selected from nitrogen or oxygen; n is 0 or 1; X is Cl or Br; with the following proviso: when Rf is CF3, then n is 1.

A hydrofluoroolefin compound represented by the following general formula (II): Formula (II) where Rf is a linear, branched, or cyclic perfluoroalkyl group having 1-6 carbon atoms, and optionally comprises at least one catenated heteroatom selected from nitrogen or oxygen; n is 0 or 1; X is Cl or Br; with the following proviso: when Rf is CF3, then n is 1.

What is provided is a fluorine-containing ether compound represented by the following formula. R.sup.1—CH.sub.2—R.sup.2—CH.sub.2—OCH.sub.2CH(OH)CH.sub.2O—CH.sub.2—R.sup.3—CH.sub.2—R.sup.4 (In the formula, R.sup.2 and R.sup.3 are perfluoropolyether chains, and R.sup.1 and R.sup.4 are terminal groups having two or three polar groups, in which individual polar groups are bound to different carbon atoms and the carbon atoms to which the polar groups are bound are bound to each other via a linking group having a carbon atom to which the polar groups are not bound).

The present invention relates to a process for the preparation of fluorinated compounds, to novel compounds containing fluorinated end groups, to the use thereof and to compositions comprising novel compounds containing fluorinated end groups.

The present invention relates to a process for the preparation of fluorinated compounds, to novel compounds containing fluorinated end groups, to the use thereof and to compositions comprising novel compounds containing fluorinated end groups.

Provided are a lubricant that is highly resistant to contamination and highly thermally stable, a lubricant that is highly durable and highly heat resistant, and a magnetic disk. A fluoropolyether compound contains perfluoropolyether groups, end groups each containing at least one hydroxyl group, and a linking group that is comprised of a C.sub.4-C.sub.14 hydrocarbon group and that contains at least one hydroxyl group.

A fluorine-containing ether compound represented by the following formula (1) is provided.

R.sup.2—CH.sub.2—R.sup.1—CH.sub.2OCH.sub.2CH(OH)—(CH.sub.2).sub.n—CH(OH)CH.sub.2OCH.sub.2—R.sup.1—CH.sub.2—R.sup.2  (1)

(in the formula (1), n is an integer of 2 to 6, R.sup.1 is a perfluoropolyether chain, R.sup.2 is —OCH.sub.2CH(OH)CH.sub.2O(CH.sub.2).sub.mOH (m in the formula is an integer of 2 to 4)).