The present application provides tertiary azeotrope or azeotrope-like compositions comprising trans-dichloroethylene and two additional components. Methods of using the compositions provided herein in cleaning, defluxing, deposition, and carrier fluid applications are also provided.

A compound of the formula (1), lubricant containing the compound and magnetic disk
R.sup.1C.sub.6H.sub.4OCH.sub.2CH(OH)CH.sub.2OCH.sub.2R.sup.2CH.sub.2OCH.sub.2CH(OH)CH.sub.2OC.sub.6H.sub.4R.sup.1 (1)
wherein R.sup.1 is alkoxyl having 1 to 4 carbon atoms, amino or amido, R.sup.2 is CF.sub.2CF.sub.2O(CF.sub.2CF.sub.2CF.sub.2O).sub.zCF.sub.2CF.sub.2 or CF.sub.2CF.sub.2CF.sub.2O(CF.sub.2CF.sub.2CF.sub.2CF.sub.2O).sub.nCF.sub.2CF.sub.2CF.sub.2, z is a real number of 1 to 15, n is a real number of 0 to 4.

A fluorine-containing ether compound of the present invention is represented by Formula (1).

R.sup.1CH.sub.2R.sup.2CH.sub.2R.sup.3(1)

(In Formula (1), R.sup.1 is an organic end group having 3 or more carbon atoms which includes two or more polar groups with each polar group being bonded to different carbon atoms and the carbon atoms to which the polar groups are bonded being bonded to each other via a linking group including the carbon atoms which are not bonded to the polar groups, R.sup.2 includes a perfluoropolyether chain represented by Formula (3), and R.sup.3 is a hydroxyl group or R.sup.1)

(CF.sub.2).sub.y-1O((CF.sub.2).sub.yO).sub.z(CF.sub.2).sub.y-1(3)

(In Formula (3), y represents an integer of 2 to 4, and z represents an integer of 1 to 30).

What is provided is a fluorine-containing ether compound represented by the following formula.
R.sup.1CH.sub.2R.sup.2CH.sub.2OCH.sub.2CH(OH)CH.sub.2OCH.sub.2R.sup.3CH.sub.2R.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).

This fluorine-containing ether compound is represented by formula (1) shown below.
R.sup.1CH.sub.2R.sup.2CH.sub.2R.sup.3(1) In formula (1), R.sup.2 is a perfluoropolyether chain represented by a formula (2) shown below. R.sup.1 is a terminal group that is bonded to R.sup.2 via a CH.sub.2 group, and is represented by a formula (3) shown below. R.sup.3 is bonded to R.sup.2 via a CH.sub.2 group, is a terminal group having at least one hydroxyl group, and may be the same as, or different from, R.sup.1.
(CF.sub.2).sub.p-1O((CF.sub.2).sub.pO).sub.q(CF.sub.2).sub.p-1(2) In formula (2), p represents an integer of 2 to 3, and q indicates the average polymerization degree and is a number within a range from 1 to 20.
O(CH.sub.2CH(OH)CH.sub.2O).sub.2CH.sub.2(CH.sub.2).sub.nOH(3) In formula (3), n represents an integer of 1 to 8.

A lubricant for magnetic media according to general formula (I):

Rv.sup.1-Rb.sup.1-Re.sup.1-Rc-Re.sup.2-Rb.sup.2-Rv.sup.2(I); where Rc is an optionally non-fluorinated divalent linking segment comprising a first at least one anchoring functional group engageable with a protective overcoat of a magnetic recording medium; where each Re.sup.1 and Re.sup.2 has a rotational energy barrier that is greater than the rotational energy barrier of CH.sub.2; where each Rb.sup.1 and Rb.sup.2 independently is a chain segment comprising at least one of a fluoroalkyl ether moiety, a fluoroalkenyl ether moiety, a perfluoroalkyl ether moiety, a perfluoroalkenyl ether moiety, or a combination thereof; and where each of Rv.sup.1 and Rv.sup.2, when present, independently each has a second at least one anchoring functional group engageable with the protective overcoat of a magnetic recording medium. -Re.sup.1-Rc-Re.sup.2 may have the formula:

##STR00001##

where R.sub.L, if present, is C.sub.nM.sub.2, wherein M is H, and n is from 1 to 10.

A lubricant for magnetic media according to general formula (I):
Rv.sup.1-Rb.sup.1Re.sup.1-Rc-Re.sup.2Rb.sup.2-Rv.sup.2(I); where Rc is an optionally non-fluorinated divalent linking segment comprising a first at least one anchoring functional group engageable with a protective overcoat of a magnetic recording medium; where each Re.sup.1 and Re.sup.2 has a rotational energy barrier that is greater than the rotational energy barrier of CH.sub.2; where each Rb.sup.1 and Rb.sup.2 independently is a chain segment comprising at least one of a fluoroalkyl ether moiety, a fluoroalkenyl ether moiety, a perfluoroalkyl ether moiety, a perfluoroalkenyl ether moiety, or a combination thereof; and where each of Rv.sup.1 and Rv.sup.2, when present, independently each has a second at least one anchoring functional group engageable with the protective overcoat of a magnetic recording medium. Re.sup.1-Rc-Re.sup.2 may have the formula: ##STR00001##
where R.sub.L, if present, is C.sub.nM.sub.2, wherein M is H, and n is from 1 to 10.

A lubricant provides enhanced performance at high temperatures, along with a higher evaporation temperature, where the main-chain includes a moiety with a rotational energy barrier that is higher than CF.sub.2. The lubricant has the general Formula (I):

##STR00001##

wherein Rc is a multivalent central group, Rb is a main chain group having a constituent with a higher rotational energy threshold than CF.sub.2, Re is an end group having at least one anchoring functional group, m is from 2 to 50, and n is from 2 to 8. The constituent with a higher rotational energy threshold than CF.sub.2, may be a substituted or non-substituted aromatic group.

A fluorine-containing ether compound represented by the following formula: R.sup.1R.sup.2CH.sub.2R.sup.3[CH.sub.2R.sup.4CH.sub.2R.sup.3].sub.xCH.sub.2R.sup.5R.sup.6 (R.sup.1 and R.sup.6 are an organic group having 1 to 50 carbon atoms; R.sup.2 is Formula (2-1) or (2-2); R.sup.5 is Formula (2-3) or (2-4); R.sup.3 is a perfluoropolyether chain; R.sup.4 is Formula (3-1) or (3-2); and x is 0 to 2).

##STR00001##

A lubricant for magnetic media according to general formula (I):

##STR00001##

where Rc is an optionally non-fluorinated divalent linking segment comprising a first at least one anchoring functional group engageable with a protective overcoat of a magnetic recording medium; where each Re.sup.1 and Re.sup.2 has a rotational energy barrier that is greater than the rotational energy barrier of CH.sub.2; where each Rb.sup.1 and Rb.sup.2 independently is a chain segment comprising at least one of a fluoroalkyl ether moiety, a fluoroalkenyl ether moiety, a perfluoroalkyl ether moiety, a perfluoroalkenyl ether moiety, or a combination thereof; and where each of Rv.sup.1 and Rv.sup.2, when present, independently each has a second at least one anchoring functional group engageable with the protective overcoat of a magnetic recording medium. Re.sup.1RcRe.sup.2 may have the formula:

##STR00002##

where R.sub.L, if present, is C.sub.nM.sub.2, wherein M is H, and n is from 1 to 10.