US4412057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing aromatic polyesters
Assignee: Kanegafuchi Chemical Industry Co Ltd
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Filing: 1981-12-16
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Granted: 1983-10-25
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Expires: 2001-12-16
Abstract
Abstract A process for manufacturing an aromatic polyester by reacting an aromatic dicarboxylic acid dichloride with an alkali metal salt of a bisphenol comprises adding 0.01 to 100 mol %, based on the total monomer quantity, of an acid halide into the reaction system.
Inventors
- 👤 Masahiro Asada
- 👤 Miyuki Matsuura
- 👤 Kazuya Yonezawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:38
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/79; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/19; C08G63/40
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
62 words
In a process for manufacturing an aromatic polyester by reacting an aromatic dicarboxylic acid dichloride with an alkali metal salt of a bisphenol in an aqueous solution, the improvement which comprises adding 0.01 to 100 mol%, based on the total monomer quantity, of an acid monohalide into the reaction system at a time when the conversion degree is not lower than 50%.
Claim 2
Dependent Claim
62 words
In a process for manufacturing an aromatic polyester by reacting an aromatic dicarboxylic acid dichloride with an alkali metal salt of a bisphenol in an aqueous solution, the improvement which comprises adding 0.01 to 100 mol%, based on the total monomer quantity, of an acid monohalide into the reaction system at a time when the conversion degree is not lower than 50%.
Claim 3
Dependent Claim
65 words
A process for separating an aromatic polyester organic solvent phase from a reaction mixture of an aromatic dicarboxylic acid chloride in an organic solvent reacted with a solution of bisphenol in an aqueous solution, wherein an oil-soluble phase transfer catalyst consisting of an acid monohalide is added to the reaction mixture to separate the organic solvent phase containing the resultant polyester from the aqueous phase.
Claim 4
Dependent Claim
65 words
A process for separating an aromatic polyester organic solvent phase from a reaction mixture of an aromatic dicarboxylic acid chloride in an organic solvent reacted with a solution of bisphenol in an aqueous solution, wherein an oil-soluble phase transfer catalyst consisting of an acid monohalide is added to the reaction mixture to separate the organic solvent phase containing the resultant polyester from the aqueous phase.
Claim 5
Dependent Claim
20 words
A process of claim 1, wherein said acid monohalide is added at a time after substantially terminating the polymerisation reaction.
Claim 6
Dependent Claim
55 words
A process of claim 1, wherein said acid monohalide is at least one of the compounds of the formula: R--Y--X where R stands for a monovalent organic group, Y stands for a group selected from the group consisting of --CO--, --SO 2 --, --SO--, --PO 2 -- and --PO--, and X stands for an halogen.
Claim 7
Dependent Claim
22 words
A process of claim 4, wherein said monovalent organic group is a divalent hydrocarbon group containg from one to 30 carbon atoms.
Claim 8
Dependent Claim
28 words
A process of claim 5, wherein said divalent hydrocarbon group is a member selected from a group consisting of alkyl group, alkenyl group, aryl group and aralkyl group.
Claim 9
Dependent Claim
23 words
A process of claim 1, wherein the amount of said acid monohalide is 0.01 to 100 mol% based on the total monomer quantity.
Claim 10
Dependent Claim
23 words
A process of claim 5, wherein the amount of said acid monohalide is one to 30 mol% based on the total monomer quantity.
Claim 11
Dependent Claim
19 words
A process of claim 1, wherein said aromatic polyester is prepared by polymerizing aromatic carboxylic acid dihalide and bisphenols.
Claim 12
Dependent Claim
21 words
A process of claim 7, wherein said carboxylic acid dihalide is a carboxylic dichloride containing from 8 to 30 carbon atoms.
Claim 13
Dependent Claim
15 words
A process of claim 7, wherein said bisphenol contains from 6 to 30 carbon atoms.
Claim 14
Dependent Claim
19 words
A process of claim 1, wherein said aromatic polyester is prepared in the presence of a phase transfer catalyst.
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) | 1986-10-24 | 1987-04-25 | 1987-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-24 | 1991-04-25 | 1991-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-24 | 1995-04-25 | 1995-10-25 | $7700.00 | Window Closed / Lapsed |