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US4066624A
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Polyesters of naphthalene carboxylic acids and hydroxy alkoxydiphenyl sulfones
Assignee: Teijin Ltd
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Filing: 1975-01-21
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Granted: 1978-01-03
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Expires: 1995-01-21
Abstract
Abstract A process for preparing polyesters, which comprises reacting (A) a difunctional carboxylic acid component containing at least 50 mol% of a naphthalene dicarboxylic acid and/or its ester-forming derivative, (B) a diol component containing an aromatic group and at least 50 mol% of a 4,4'-bis-(ω-hydroxyalkoxy)diphenylsulfone and (C) an aliphatic or alicyclic diol component, the molar ratio of component (B) to component (A) being 0.05-1, and the molar ratio of the sum of components (B) and (C) to component (A) being 1.1-3.0; and then polymerizing the resulting reaction product in the presence of a catalyst while distilling off the excess of the component (C) out of the reaction system, thereby to form a polymer having a reduced viscosity of at least 0.5.
Inventors
- 👤 Shoji Kawase
- 👤 Takatoshi Kuratsuji
- 👤 Hiroo Inata
- 👤 Kazuyoshi Suzuki
- 👤 Takeo Shima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:03
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/688; C08G63/6884; C08G63/6886
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
159 words
Polyesters having a reduced viscosity, as measured on an o-chlorophenol solution in a concentration of 1.2 g/dl at 35° C. of at least 0.5 which comprises (A) a difunctional carboxylic acid component containing at least 50 mol% of a naphthalene dicarboxylic acid and/or its lower alkyl ester or aryl ester, (B) a diol component containing an aromatic group and at least 50 mol% of said diol component being a 4,4'-bis-(ω-hydroxyalkoxy)diphenylsulfone of the general formula ##STR3## wherein n is an integer of 2 to 6, and (C) is a diol component of the general formula HO--R--OH wherein R is an aliphatic or alicyclic hydrocarbon group containing 2 to 12 carbon atoms, said polyester obtained by heat polymerizing, while distilling off the excessive of the component (C) out of the reaction system at a molar ratio of component (B) to component (A) of 0.05-1:1 and a molar ratio of the sum of components (B) and (C) to component (A) of 1.1-3.0:1.
Claim 2
Dependent Claim
159 words
Polyesters having a reduced viscosity, as measured on an o-chlorophenol solution in a concentration of 1.2 g/dl at 35° C. of at least 0.5 which comprises (A) a difunctional carboxylic acid component containing at least 50 mol% of a naphthalene dicarboxylic acid and/or its lower alkyl ester or aryl ester, (B) a diol component containing an aromatic group and at least 50 mol% of said diol component being a 4,4'-bis-(ω-hydroxyalkoxy)diphenylsulfone of the general formula ##STR3## wherein n is an integer of 2 to 6, and (C) is a diol component of the general formula HO--R--OH wherein R is an aliphatic or alicyclic hydrocarbon group containing 2 to 12 carbon atoms, said polyester obtained by heat polymerizing, while distilling off the excessive of the component (C) out of the reaction system at a molar ratio of component (B) to component (A) of 0.05-1:1 and a molar ratio of the sum of components (B) and (C) to component (A) of 1.1-3.0:1.
Claim 3
Dependent Claim
18 words
The polyesters of claim 1 wherein the molar ratio of component (B) to component (A) is from 0.5-1:1.
Claim 4
Dependent Claim
13 words
The polyesters of claim 2 wherein 100 mol% of component (B) is 4,4'-bis-(ω-hydroxyalkoxy)diphenylsulfone.
Claim 5
Dependent Claim
15 words
The polyesters of claim 1 wherein said component (C) is ethylene glycol or neopentylene glycol.
Claim 6
Dependent Claim
28 words
The polyesters of claim 1 wherein said naphthalene dicarboxylic acid is at least one member selected from the group consisting of: naphthalene-2,6-dicarboxylic acid, naphthalene-2,7-dicarboxylic acid and naphthalene-1,5-dicarboxylic acid.
Claim 7
Dependent Claim
81 words
The polyesters of claim 1 wherein up to 40 mol% of component (B) is at least one diol containing an aromatic group selected from 2,4'-bis-(ω-hydroxyalkoxy) diphenylsulfone, 2,2'-bis-(ω-hydroxyalkoxy) diphenylsulfone and a diol expressed by the following formula (III) ##STR4## wherein m is an integer of 2 of 6; and R 1 and R 2 are organic groups containing 1 to 6 carbon atoms and they may be the same or different, or they may be linked together to form a cyclohexane group.
Claim 8
Dependent Claim
13 words
The polyesters of claim 3 wherein said 4,4'-bis-(ω-hydroxyalkoxy) diphenylsulfone is 4,4'-bis-(β-hydroxy ethoxy) diphenylsulfone.
Claim 9
Dependent Claim
13 words
The polyesters of claim 6 wherein said 4,4'-bis-(ω-hydroxyalkoxy) diphenylsulfone is 4,4'-bis-(β-hydroxy ethoxy) diphenylsulfone.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |