Patent EP0693513A2 successfully refreshed from Google Patents.
EP0693513A2
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EP
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Process for purifying a polyether
Assignee: AGC Inc
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Filing: 1995-07-17
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Granted: —
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Expires: 2015-07-17
Abstract
Abstract A process for purifying a polyether, which comprises adding to a polyether (A) containing a first salt, water (B) and a compound (C) which is capable of reacting with an ion constituting the first salt to form a second salt which is essentially insoluble in the polyether (A), then removing water, followed by removing the second salt from the polyether (A).
Inventors
- 👤 Takashi C/O Asahi Glass Company Ltd. Watabe
- 👤 Hiroshi C/O Asahi Glass Company Ltd. Hatano
- 👤 Kazunori C/O Asahi Glass Company Ltd. Chiba
- 👤 Takao C/O Asahi Glass Company Ltd. Doi
- 👤 Toru C/O Asahi Glass Company Ltd. Ueno
- 👤 Etsuko C/O Asahi Glass Company Ltd. Sakai
- 👤 Minoru C/O Asahi Glass Company Ltd. Yamada
- 👤 Shinya C/O Asahi Glass Company Ltd. Saiki
- 👤 Hirotsugu C/O Asahi Glass Company Ltd. Yamamoto
- 👤 Toshihiko C/O Asahi Glass Company Ltd. Higuchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 12:57
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/30; C08G65/26; C08G65/2642; C08G65/32; C08G65/321; C08G65/327; C08G65/329; C08G65/336
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
61 words
A process for purifying a polyether, which comprises adding to a polyether (A) containing a first salt, water (B) and a compound (C) which is capable of reacting with an ion constituting the first salt to form a second salt which is essentially insoluble in the polyether (A), then removing water, followed by removing the second salt from the polyether (A).
Claim 2
Dependent Claim
22 words
The purification process according to Claim 1, wherein a surfactant (D) is added together with the water (B) and the compound (C).
Claim 3
Dependent Claim
16 words
The purification process according to Claim 1 or 2, wherein the compound (C) is disodium dihydrogenpyrophosphate.
Claim 4
Dependent Claim
38 words
The purification process according to Claim 1, 2 or 3, wherein the polyether (A) is a hydroxyl group-containing polyether obtained by reacting a monoepoxide to an initiator in the presence of a metal catalyst, or its modified product.
Claim 5
Dependent Claim
60 words
The purification process according to Claim 1, 2 or 3, wherein the polyether (A) is an unsaturated group-containing polyether obtained by reacting a monoepoxide to an initiator in the presence of a metal catalyst to obtain a hydroxyl group-containing polyether, then converting the hydroxyl group-containing polyether to an alkali metal alkoxide, followed by reacting an unsaturated group-containing halogenated hydrocarbon thereto.
Claim 6
Dependent Claim
31 words
The purification process according to Claim 4 or 5, wherein the metal catalyst is a double metal cyanide complex compound catalyst, a porphyrin metal complex compound catalyst and/or an alkali catalyst.
Claim 7
Dependent Claim
25 words
The purification process according to any one of Claims 1 to 6, wherein the first salt contains a zinc salt and an alkali metal salt.
Claim 8
Dependent Claim
158 words
A process for producing a hydrolyzable group-containing silicon group-containing polyether, which comprises adding to a polyether (A-1) containing a first salt, water (B) and a compound (C) which is capable of reacting with an ion constituting the first salt to form a second salt which is essentially insoluble in the polyether (A-1), then removing water, followed by removing the second salt from the polyether (A-1) to purify the polyether (A-1), and then reacting thereto a silicon compound (E) containing a silicon atom to which a hydrogen atom and a hydrolyzable group are directly bonded, in the presence of a catalyst comprising a Group 8 metal or its compound, wherein the polyether (A-1) is an unsaturated group-containing polyether obtained by reacting a monoepoxide to an initiator in the presence of a metal catalyst to obtain a hydroxyl group-containing polyether, then converting the hydroxyl group-containing polyether to an alkali metal alkoxide, followed by reacting an unsaturated group-containing halogenated hydrocarbon thereto.
Claim 9
Dependent Claim
17 words
A curable composition containing a hydrolyzable group-containing silicon group-containing polyether prepared by the process of Claim 8.
Claim 10
Dependent Claim
22 words
A curable composition containing a hydrolyzable group-containing silicon group-containing polyether wherein the total amount of ionic impurities is at most 50 ppm.
References Cited (Backward Citations)
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