To provide a fluorinated ether compound capable of forming a surface layer excellent in initial water/oil repellency, fingerprint stain removability, abrasion resistance and light resistance; a fluorinated ether composition and a coating liquid containing the fluorinated ether compound; an article having a surface layer excellent in initial water/oil repellency, fingerprint stain removability, abrasion resistance and light resistance and a method for producing it. A fluorinated ether compound having a poly(oxyperfluoroalkylene) chain having a unit (a) which is an oxyperfluoroalkylene unit having 5 or 6 carbon atoms, and a unit (P) which is an oxyperfluoroalkylene unit having at most 4 carbon atoms, and having at least one of a hydrolysable silyl group and a silanol group on at least one terminal of the poly(oxyperfluoroalkylene) chain via a linking group.

The present invention relates to a method for exchanging heat with an object said method comprising using a heat transfer fluid wherein said heat transfer fluid comprises one or more chemical compounds having the general formula: (I) wherein: R.sub.1, R.sub.2, R.sub.3, R.sub.4 can be the same or different, linear or branched, partially fluorinated alkyl groups having a C1-C6 carbon chain.

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A method includes combining first components including at least one of CF.sub.2═CF—CF.sub.2—OSO.sub.2Cl or CF.sub.2═CF—CF.sub.2—OSO.sub.2CF.sub.3, a polyfluorinated compound having at least one ketone or carboxylic acid halide, and fluoride ion to provide a compound comprising at least one perfluorinated allyl ether group. A method includes combining second components including B(OSO.sub.2Cl).sub.3 and hexafluoropropylene to provide CF.sub.2═CF—CF.sub.2—OSO.sub.2Cl. Another method includes combining second components including M(OSO.sub.2CF.sub.3).sub.3 and hexafluoropropylene at a temperature above 0° C. to provide CF.sub.2═CF—CF.sub.2—OSO.sub.2CF.sub.3, wherein M is Al or B. The compound CF.sub.2═CF—CF.sub.2—OSO.sub.2Cl is also provided.

A method includes combining first components including at least one of CF.sub.2═CF—CF.sub.2—OSO.sub.2Cl or CF.sub.2═CF—CF.sub.2—OSO.sub.2CF.sub.3, a polyfluorinated compound having at least one ketone or carboxylic acid halide, and fluoride ion to provide a compound comprising at least one perfluorinated allyl ether group. A method includes combining second components including B(OSO.sub.2Cl).sub.3 and hexafluoropropylene to provide CF.sub.2═CF—CF.sub.2—OSO.sub.2Cl. Another method includes combining second components including M(OSO.sub.2CF.sub.3).sub.3 and hexafluoropropylene at a temperature above 0° C. to provide CF.sub.2═CF—CF.sub.2—OSO.sub.2CF.sub.3, wherein M is Al or B. The compound CF.sub.2═CF—CF.sub.2—OSO.sub.2Cl is also provided.

To provide a fluorinated ether compound capable of forming a surface layer excellent in initial water/oil repellency, fingerprint stain removability, abrasion resistance and light resistance; a fluorinated ether composition and a coating liquid containing the fluorinated ether compound; an article having a surface layer excellent in initial water/oil repellency, fingerprint stain removability, abrasion resistance and light resistance and a method for producing it. A fluorinated ether compound having a poly(oxyperfluoroalkylene) chain having a unit (α) which is an oxyperfluoroalkylene unit having 5 or 6 carbon atoms, and a unit (β) which is an oxyperfluoroalkylene unit having at most 4 carbon atoms, and having at least one of a hydrolysable silyl group and a silanol group on at least one terminal of the poly(oxyperfluoroalkylene) chain via a linking group.

A method includes combining first components including at least one of CF.sub.2═CF—CF.sub.2—OSO.sub.2Cl or CF.sub.2═CF—CF.sub.2—OSO.sub.2CF.sub.3, a polyfluorinated compound having at least one ketone or carboxylic acid halide, and fluoride ion to provide a compound comprising at least one perfluorinated allyl ether group. A method includes combining second components including B(OSO.sub.2Cl).sub.3 and hexafluoropropylene to provide CF.sub.2═CF—CF.sub.2—OSO.sub.2Cl. Another method includes combining second components including M(OSO.sub.2CF.sub.3).sub.3 and hexafluoropropylene at a temperature above 0° C. to provide CF.sub.2═CF—CF.sub.2—OSO.sub.2CF.sub.3, wherein M is Al or B. The compound CF.sub.2═CF—CF.sub.2—OSO.sub.2Cl is also provided.

A method includes combining first components including at least one of CF.sub.2═CF—CF.sub.2—OSO.sub.2Cl or CF.sub.2═CF—CF.sub.2—OSO.sub.2CF.sub.3, a polyfluorinated compound having at least one ketone or carboxylic acid halide, and fluoride ion to provide a compound comprising at least one perfluorinated allyl ether group. A method includes combining second components including B(OSO.sub.2Cl).sub.3 and hexafluoropropylene to provide CF.sub.2═CF—CF.sub.2—OSO.sub.2Cl. Another method includes combining second components including M(OSO.sub.2CF.sub.3).sub.3 and hexafluoropropylene at a temperature above 0° C. to provide CF.sub.2═CF—CF.sub.2—OSO.sub.2CF.sub.3, wherein M is Al or B. The compound CF.sub.2═CF—CF.sub.2—OSO.sub.2Cl is also provided.

An object is to provide a method for producing a fluorine-containing compound by using an easily available compound under relatively mild reaction conditions to produce a fluorine-containing compound, a fluorine-containing compound suitably used in the production method, and a fluorine-containing compound obtained by the production method.

There is provided a method for producing a fluorine-containing compound, the method including: reacting a compound having a partial structure represented by the following formula (a) with a Grignard reagent in the presence of a transition metal compound.

—C(—R.sup.a)(—R.sup.b)—CH.sub.2-L  Formula (a) where, in the formula, R.sup.a is a fluorine atom or a fluoroalkyl group, R.sup.b is a hydrogen atom or a fluoroalkyl group, and L is a sulfonate group.

Methods, systems, and assemblies for cooling an electronic component are disclosed. A heat sink assembly includes first and second substrates. The first substrate is in thermal contact with the electronic component. A primary channel is formed in the second surface of the first substrate. The primary channel is configured to direct cooling fluid for cooling the electronic component. An array of primary cooling fluid fins is positioned within the primary channel. The array of primary cooling fluid fins includes upstream solid fins and downstream open fins each having an upstream opening and downstream sidewalls. The secondary channel is formed within the second surface of the second substrate and is configured to direct partially heated cooling fluid away from the electronic component. An array of secondary cooling fluid fins is positioned within the secondary channel downstream. An enclosing layer seals the secondary channel.

What is provided is a fluorine-containing ether compound represented by the following formula. R.sup.1R.sup.2OCH.sub.2R.sup.3CH.sub.2OR.sup.4R.sup.5

(R.sup.3 is a perfluoropolyether chain; R.sup.2 is represented by Formula (2), R.sup.4 is represented by Formula (3), R.sup.1 and R.sup.5 are hydrogen atoms or Formula (4); a and b in Formula (2) are an integer of 0 to 2, c in Formula (2) is an integer of 2 to 5, d and e in Formula (3) are an integer of 0 to 2, f in Formula (3) is an integer of 2 to 5; at least one of b in Formula (2) and e in Formula (3) is 1 or more; and k in Formula (4) is an integer of 3 to 6.)

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