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Patent US4373090A successfully refreshed from Google Patents.
US4373090A
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Arylene sulfide polymer preparation
Assignee: Phillips Petroleum Co
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Filing: 1982-02-16
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Granted: 1983-02-08
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Expires: 2002-02-16
Abstract
Abstract A method for producing arylene sulfide polymer in which an anhydrous reaction mixture containing at least one polyhalo-substituted aromatic compound, at least one organic amide, at least one alkali metal hydroxide, and H 2 S is maintained at polymerization conditions for a time sufficient to produce polymer. In a preferred embodiment the reaction mixture contains at least one alkali metal salt derived from a monocarboxylic acid or carbonic acid.
Inventors
- 👤 James T. Edmonds, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:44
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/02; C08G75/0204; C08G75/025; C08G75/0272
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
57 words
A method for producing polymers comprising: (a) contacting at polymerization conditions an anhydrous reaction mixture comprising: (1) at least one polyhalo-substituted aromatic compound, (2) at least one organic amide, (3) at least one alkali metal hydroxide, and (4) H 2 S, and (b) maintaining said reaction mixture at polymerization conditions for a time sufficient to produce polymer.
Claim 2
Independent Claim
57 words
A method for producing polymers comprising: (a) contacting at polymerization conditions an anhydrous reaction mixture comprising: (1) at least one polyhalo-substituted aromatic compound, (2) at least one organic amide, (3) at least one alkali metal hydroxide, and (4) H 2 S, and (b) maintaining said reaction mixture at polymerization conditions for a time sufficient to produce polymer.
Claim 3
Dependent Claim
31 words
A method of claim 1 wherein reaction mixture components (1), (2) and (3) are contacted to form a first reaction mixture and this first reaction mixture is contacted with component (4).
Claim 4
Dependent Claim
49 words
A method of claim 1 wherein reaction mixture components (2), and (3) are contacted to form a first reaction mixture and this first reaction mixture is contacted with component (4) to form a second reaction mixture which is contacted with component (1) in the presence of additional component (2).
Claim 5
Dependent Claim
29 words
A method of claim 1, 2, or 3 wherein at least one alkali metal salt derived from a monocarboxylic acid or carbonic acid is present in the reaction mixture.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-07 | 1986-08-09 | 1987-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-07 | 1990-08-09 | 1991-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-07 | 1994-08-09 | 1995-02-08 | $7700.00 | Window Closed / Lapsed |