Patent EP0187638A1 successfully refreshed from Google Patents.
EP0187638A1
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Polycyanoaryl ether and method of preparing the same
Assignee: Idemitsu Kosan Co Ltd
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Filing: 1986-01-02
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Granted: —
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Expires: 2006-01-02
Abstract
Abstract A plycyano aryul ether which has recurring units each represented by the formula: and a reduced viscosity of which is 0.3 dl/g or more at 60°C in a in which the polycyanoaryl ether is dissolved in ophenol in concentration of 0.2 g/dl. is prepared by a dihalogenobenzonitrile represented by the formu- wherein X is a halogen atom, with an alkali metal salt of dihydroxynaphthalene represented by the formula: wherein M is an alkali metal in the presence of a solvent. The polymer of this invention is excellent in mechanical strength, fire retardance and solvent resistance.
Inventors
- 👤 Shigeru Matsuo
- 👤 Tomoyoshi Murakami
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 08:15
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/38; C08G65/40; C08G65/4006; C08G2650/00; C08G2650/62; C08G2650/64
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
44 words
1 A plycyano aryl ether which has recurring units each represented by the formula: and has a reduced viscosity of 0.3 dl/g or more at 60 °C in a solution in which the polycyanoaryl ether is dissolved in p-chlorophenol in concentration of 0.2 g/dl.
Claim 2
Dependent Claim
44 words
1 A plycyano aryl ether which has recurring units each represented by the formula: and has a reduced viscosity of 0.3 dl/g or more at 60 °C in a solution in which the polycyanoaryl ether is dissolved in p-chlorophenol in concentration of 0.2 g/dl.
Claim 3
Independent Claim
89 words
A method of preparing a polycyanoaryl ether which has recurring units each represented by the formula: and has a reduced viscosity of 0.3 dl/g or more at 60 °C in a solution in which the polycyanoaryl ether is dissolved in p-chlorophenol in concentration of 0.2 g/dl, which comprises reacting a dihalogenobenzonitrile represented by the formula: wherein X is a halogen atom, with an alkali metal salt of dihydroxynaphthalene represented by the formula: wherein M is an alkali metal. in the presence of a solvent to effect a polycondensation reaction.
Claim 4
Independent Claim
89 words
A method of preparing a polycyanoaryl ether which has recurring units each represented by the formula: and has a reduced viscosity of 0.3 dl/g or more at 60 °C in a solution in which the polycyanoaryl ether is dissolved in p-chlorophenol in concentration of 0.2 g/dl, which comprises reacting a dihalogenobenzonitrile represented by the formula: wherein X is a halogen atom, with an alkali metal salt of dihydroxynaphthalene represented by the formula: wherein M is an alkali metal. in the presence of a solvent to effect a polycondensation reaction.
Claim 5
Dependent Claim
48 words
The method according to Claim 2, wherein the reaction is carried out in the presence of a monovalent phenol represented by the formula: wherein R is a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an aryl group, an aralkyl group or a cyano group.
Claim 6
Dependent Claim
25 words
The'method according to Claim 2, wherein the alkali metal salt of dihydroxynaphthalene is at least one of alkali metal salts of 2,7-dihydroxynaphthalene, 1,5-dihydroxynaphthalene and 1,6-dihydroxynaphtalene.
Claim 7
Dependent Claim
14 words
The method according to Claim 2, wherein the solvent is a aprotic polar solvent.
Claim 8
Dependent Claim
33 words
The method according to Claim 2, wherein the dihalogenobenzonitrile and the alkali metal salt of dihydroxynaphthalene are each added in an amount of from 0.07 to 0.2 mole per deciliter of the solvent.
Claim 9
Dependent Claim
58 words
The method according to Claim 2, which further comprises adding to a resulting reaction mixture a solvent which does not dissolve the resulting polymer but has compatibility with the solvent used in the polycondensation when the concentration of the resulting polymer dissolved in the reaction mixture reaches to the range of from 2 to 20 % by weight.
Claim 10
Dependent Claim
48 words
The method according to Claim 7, wherein the solvent which does not dissolve the resulting polymer but has compatibility with the solvent used in the polycondensation is selected from the group consisting of water, methanol, ethanol, propanol, butanol, acetone, methyl ethyl ketone, methyl isobutyl ketone, y-butyrolactone and tetrachloroethane.
Claim 11
Dependent Claim
16 words
The method according to Claim 2, wherein the alkali metal salt is sodium or potasium salt.
Claim 12
Dependent Claim
29 words
The method according to Claim 2, the alkali metal salt of dihydroxynaphtalene represented by the formula (III) is obtained by employing independently dihydroxynaphtalene and a salt of alkali metal.
References Cited (Backward Citations)
FR2122562A1
Cited
EP0106023A2
Cited
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