Patent EP0072540A2 successfully refreshed from Google Patents.
EP0072540A2
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EP
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Melt-anisotropic wholly aromatic polyester, process for production thereof, and fibers or films thereof
Assignee: Teijin Ltd
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Filing: 1982-08-12
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Granted: —
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Expires: 2002-08-12
Abstract
Abstract A fiber- or film-forming wholly aromatic polyester having melt anisotropy, said polyester consisting essentially of (1) units (a) derived from an aromatic dicarboxylic acid at least 90 mole% of which consists of a p-oriented aromatic dicarboxylic acid and units (b) derived from an aromatic dihydroxy compound at least about 90 mole% of which consists of a mono-substituted hydroquinone ring-substituted by an alkyl group having at least 5 carbon atoms or an aralkyl group having at least 7 carbon atoms or a mixture of said mono-substituted hydroquinone and unsubstituted hydroquinone or a substituted hydroquinone other than said mono-substituted hydroquinone, the proportion of said mono-substituted hydroquinone being at least 80 mole%; or (2) said units (a) and (b), and units (c) derived from a p-oriented aromatic hydroxycarboxylic acid at least about 70 mole% of which consists of p-hydroxybenzoic acid and/or a mono-substituted p-hydroxybenzoic acid, the proportion of the units derived from the p-oriented aromatic dicarboxylic acid and the units derived from the mono-substituted hydroquinone being at least about 9 mole% based on the entire structural units of the polyester; a process for production thereof; and fibers or films prepared therefrom.
Inventors
- 👤 Wataru Funakoshi
- 👤 Takanori Urasaki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 17:23
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/19; C08G63/60; C08G63/605; D; D01; D01F; D01F6/00; D01F6/58; D01F6/62; D01F6/78; D01F6/84; C08J2367/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
175 words
A fiber-or film-forming wholly aromatic polyester having melt anisotropy, said polyester consisting essentially of (1) units (a) derived from an aromatic dicarboxylic acid at least 90 mole% of which consists of a p-oriented aromatic dicarboxylic acid and units (b) derived from an aromatic dihydroxy compound at least about 90 mole% of which consists of a mono-substituted hydroquinone ring-substituted by an alkyl group having at least 5 carbon atoms or an aralkyl group having at least 7 carbon atoms or a mixture of said mono-substituted hydroquinone and unsubstituted hydroquinone or a substituted hydroquinone other than said mono-substituted hydroquinone, the proportion of said mono-substituted hydroquinone being at least 80 mole%;or (2) said units (a) and (b), and units (c) derived from a p-oriented aromatic hydroxycarboxylic acid at least about 70 mole% of which consists of p-hydroxybenzoic acid and/or a mono-substituted p-hydroxybenzoic acid, the proportion of the units derived from the p-oriented aromatic dicarboxylic acid and the units derived from the mono-substituted hydroquinone being at least about 9 mole% based on the entire structural units of the polyester.
Claim 2
Dependent Claim
175 words
A fiber-or film-forming wholly aromatic polyester having melt anisotropy, said polyester consisting essentially of (1) units (a) derived from an aromatic dicarboxylic acid at least 90 mole% of which consists of a p-oriented aromatic dicarboxylic acid and units (b) derived from an aromatic dihydroxy compound at least about 90 mole% of which consists of a mono-substituted hydroquinone ring-substituted by an alkyl group having at least 5 carbon atoms or an aralkyl group having at least 7 carbon atoms or a mixture of said mono-substituted hydroquinone and unsubstituted hydroquinone or a substituted hydroquinone other than said mono-substituted hydroquinone, the proportion of said mono-substituted hydroquinone being at least 80 mole%;or (2) said units (a) and (b), and units (c) derived from a p-oriented aromatic hydroxycarboxylic acid at least about 70 mole% of which consists of p-hydroxybenzoic acid and/or a mono-substituted p-hydroxybenzoic acid, the proportion of the units derived from the p-oriented aromatic dicarboxylic acid and the units derived from the mono-substituted hydroquinone being at least about 9 mole% based on the entire structural units of the polyester.
Claim 3
Dependent Claim
21 words
The wholly aromatic polyester of claim 1 wherein the alkyl group substituted at the hydroquinone has 5 to 10 carbon atoms.
Claim 4
Dependent Claim
18 words
The wholly aromatic polyester wherein the aralkyl group substituted at the hydroquinone has 7 to 15 carbon atoms.
Claim 5
Dependent Claim
18 words
The wholly aromatic polyester wherein the aralkyl group substituted at the hydroquinone has 7 to 15 carbon atoms.
Claim 6
Dependent Claim
38 words
The wholly aromatic polyester of claim 1 wherein the alkyl group having at least 5 carbon atoms or the aralkyl group having at least 7 carbon atoms is bonded to the hydroquinone skeleton through a tertiary carbon atom.
Claim 7
Dependent Claim
33 words
The wholly aromatic polyester of claim 1 wherein said substituted hydroquinone other than the mono-substituted hydro quinone is mono-substituted by an alkyl group having 1 to 4 carbon atoms or a halogen atom.
Claim 8
Dependent Claim
34 words
6 . The wholly aromatic polyester of claim 1 wherein the p-oriented aromatic dicarboxylic acid is terephthalic acid, 4,4'-diphenyldicarboxylic acid, 2,6-naphthalenedicarboxylic acid or 1,5-naphthalenedicarboxylic acid, or a ring-substituted derivative of any of these acids.
Claim 9
Dependent Claim
28 words
The wholly aromatic polyester of claim 1 wherein the mono-substituted p-hydroxybenzoic acid is mono-substituted by an alkyl group having 1 to 4 carbon atoms or a halogen atom.
Claim 10
Dependent Claim
44 words
The wholly aromatic polyester of claim 1 wherein the units (b) consist essentially of units derived from the mono-substituted hydroquinone, or both the units derived from the mono-substituted hydroquinone and units derived from unsubstituted hydroquinone or a substituted hydroquinone other than the mono-substituted hydroquinone.
Claim 11
Dependent Claim
22 words
The wholly aromatic polyester of claim 1 wherein the units (a) consist essentially of units derived from the p-oriented aromatic dicarboxylic acid.
Claim 12
Dependent Claim
25 words
The wholly aromatic polyester of claim 1 wherein the units (c) consist essentially of units derived from the p-nydroxybenzoic acid and/or the mono-substituted p-hydroxybenzoic acid.
Claim 13
Dependent Claim
21 words
The wholly aromatic polyester of any one of claims 1 to 10 which has an inherent viscosity of at least 0.8.
Claim 14
Dependent Claim
29 words
The wholly aromatic polyester of any one of claims 1 to 11 which has a flow initiation temperature in the range of about 250 to about 360 0 C.
Claim 15
Dependent Claim
57 words
A process for producing a film or fiber of a wholly aromatic polyester having melt anisotropy, which comprises melting the aromatic polyester set forth in any one of claims 1 to 12 under heat to form an optically anisotropic melt, and converting the melt into a film or fiber in accordance with melt-shaping methods known per se.
Claim 16
Dependent Claim
23 words
1 4 . A film or fiber composed of the wholly aromatic polyester set forth in any one of claims 1 to 12.
Claim 17
Dependent Claim
11 words
The film of claim 14 which is unstretched or biaxially stretched.
Claim 18
Dependent Claim
25 words
The film of claim 15 which has at least one direction in which the Young's modulus is at least about 700 kg/ mm 2 .
Claim 19
Dependent Claim
17 words
The fiber of claim 14 which has a Young's modulus of at least about 2,500 kg/mm .
References Cited (Backward Citations)
No citation records indexed.
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