EP0148482A2
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Process for preparing halogen-containing polyether
Assignee: Daikin Industries Ltd
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Filing: 1984-12-20
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Granted: —
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Expires: 2004-12-20
Abstract
Abstract A halogen-containing polyether comprising repeating units of the formula: wherein a, b, c, d, e and f are each an integer not less than 0 and satisfy the following equations: and which may be prepared by ring-opening polymerizing 2,2,3,3-tetrafluorooxetane in the presence of any polymerization initiator to give a polyether comprising repeating units of the formula: wherein a is the same as defined above, and optionally fluorinating and/or chlorinating the polyether (II).
Inventors
- 👤 Yohnosuke Ohsaka
- 👤 Takashi Tohzuka
- 👤 Shoji Takaki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 02:42
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/16; C08G65/18; C08G65/22; C08G65/223; C08G65/32; C08G65/321; C08G65/323; C08G65/3233; C08G65/3236; C08G65/329; C08G65/331; C08G65/3311; C08G65/3312
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
31 words
A halogen-containing polyether comprising repeating units of the formula: wherein a, b, c, d, e and f are each an integer not less than 0 and satisfy the following equations: and
Claim 2
Dependent Claim
31 words
A halogen-containing polyether comprising repeating units of the formula: wherein a, b, c, d, e and f are each an integer not less than 0 and satisfy the following equations: and
Claim 3
Dependent Claim
26 words
A halogen-containing polyether according to claim 1, which is a fluorine-containing polyether comprising repeating units of the formula: wherein a is the same as defined above.
Claim 4
Dependent Claim
33 words
A halogen-containing polyether according to claim 1, which is a fluorine-containing polyether comprising repeating units of the formula: wherein a, d and f satisfy the above requirements and the equation: 1 < d+f.
Claim 5
Dependent Claim
25 words
A halogen-containing polyether according to claim 3, which is a perfluoropolyether comprising repeating units of the formula: wherein f is the same as defined above.
Claim 6
Dependent Claim
36 words
A halogen-containing polyether according to claim 1, which is a fluorine/chlorine-containing polyether comprising repeating units of the formula: wherein a, b, c, d, e and f satisfy the above requirements and the equation: 1 ≦ b+c+e.
Claim 7
Dependent Claim
29 words
A halogen-containing polyether according to claim 5, which is a fluorine/chlorine-containing polyether comprising repeating units of the formula: wherein a, b and c are the same as defined above.
Claim 8
Dependent Claim
48 words
A process for preparing a halogen-containing polyether according to claim 1, comprising ring-opening polymerizing 2,2,3,3-tetrafluorooxetane in the presence of an polymerization initiator to give a polyether comprising repeating units of the formula: wherein a is the same as defined above, and optionally fluorinating and/or chlorinating the polyether (II).
Claim 9
Dependent Claim
16 words
A process according to claim 7, wherein the ring-opening polimerization is carried out in an aprotic
Claim 10
Dependent Claim
12 words
solvent in the presence of an alkali metal halide as the initiator.
Claim 11
Dependent Claim
12 words
solvent in the presence of an alkali metal halide as the initiator.
Claim 12
Dependent Claim
40 words
A process according to claim 7, wherein the ring-opening polymerization is carried out in an aprotic solvent in the presence of an alkali metal fluoride and an acyl fluoride which reacts with the alkali metal fluoride to generate alkoxy anion.
Claim 13
Dependent Claim
28 words
A process according to claim 8, wherein the aprotic solvent is a polyethylene glycol dimethyl ether of the formula: wherein n is an integer of 2 to 4.
Claim 14
Dependent Claim
28 words
A process according to claim 9, wherein the aprotic solvent is a polyethylene glycol dimethyl ether of the formula: wherein n is an integer of 2 to 4.
Claim 15
Dependent Claim
29 words
A process according to claim 7, wherein the ring-opening polymerization is carried out in an aprotic solvent in the presence of a large cyclic polyether as a polymerization accelerator.
Claim 16
Dependent Claim
36 words
A process according to claim 12, wherein the aprotic solvent is selected from the group consisting of acetonitrile and a polyethylene glycol dimethyl ether of the formula: wherein m is an integer of 1 to 4.
Claim 17
Dependent Claim
12 words
A process according to claim 7, wherein the initiator is antimony pentafluoride.
Claim 18
Dependent Claim
16 words
A process according to claim 14, wherein the solvent is a dimer or trimer of hexafluoropropylene.
Claim 19
Dependent Claim
30 words
A process for preparing the fluorine-containing polyether according to claim 3, comprising fluorinating a fluorine-containing polyether comprising repeating units of the formula: wherein a is the same as defined above.
Claim 20
Dependent Claim
15 words
A process according to claim 16, wherein the fluorination is carried out with fluorine gas.
Claim 21
Dependent Claim
32 words
A process for preparing a halogen-containing polyether according to claim 5, comprising fluorinating and chlorinating a fluorine-containing polyether comprising repeating units of the formula: wherein a is the same as defined above.
Claim 22
Dependent Claim
24 words
A process according to claim 18, wherein the chlorination is carried out with chlorine gas and the fluorination is carried out with fluorine gas.
Claim 23
Dependent Claim
25 words
A process according to claim 18, wherein the chlorination is carried out with radiation of light having a wavelength of from 200 to 500 nm.
References Cited (Backward Citations)
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