US4462929A
Expired / Lapsed
US
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Solution of a chalcogen-containing polymer in acids and process of forming polymer articles therefrom
Assignee: Honeywell International Inc
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Filing: 1982-09-30
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Granted: 1984-07-31
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Expires: 2002-09-30
Abstract
Abstract A polymer solution is formed from a sulfur- or oxygen-containing aromatic polymer solute such as poly(phenylene sulfide) or poly(phenylene oxide), a Lewis Acid solute derivative (dopant) such as arsenic hexafluoride and a strong acid solvent such as sulfuric acid. Solvents such as fluorosulfonic acid may also serve to generate the dopant. The solutions are especially useful for casting polymer articles.
Inventors
- 👤 Lawrence W. Shacklette
- 👤 Granville G. Miller
- 👤 Jane E. Frommer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:30
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/124; H01B1/128; C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/097
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
117 words
A polymer solution comprising: (a) a solvent which is at least one strong acid selected from the group consisting of sulfuric acid, fluorosulfonic acid, chlorosulfonic acid, perfluoroalkylsulfonic acids, perchloric acid, HF and HCl; (b) a solute cation derived from oxidation of a polymer solute comprising aromatic moieties directly linked by divalent, trivalent or tetravalent sulfur or by divalent oxygen and (c) a dopant solute comprising a halide or oxyhalide anion of a group IIIA, IIIB, IVA, IVB, VA, VB, VIIIA or VIB metal or metalloid or a halide or oxyhalide anion of phosphorus, selenium, sulfur or boron or is the product of the reduction of a reducible strong acid or of sulfur trioxide by said polymeric solute.
Claim 2
Dependent Claim
117 words
A polymer solution comprising: (a) a solvent which is at least one strong acid selected from the group consisting of sulfuric acid, fluorosulfonic acid, chlorosulfonic acid, perfluoroalkylsulfonic acids, perchloric acid, HF and HCl; (b) a solute cation derived from oxidation of a polymer solute comprising aromatic moieties directly linked by divalent, trivalent or tetravalent sulfur or by divalent oxygen and (c) a dopant solute comprising a halide or oxyhalide anion of a group IIIA, IIIB, IVA, IVB, VA, VB, VIIIA or VIB metal or metalloid or a halide or oxyhalide anion of phosphorus, selenium, sulfur or boron or is the product of the reduction of a reducible strong acid or of sulfur trioxide by said polymeric solute.
Claim 3
Dependent Claim
12 words
The polymer solution of claim 1 wherein said polymer is poly(phenylene sulfide).
Claim 4
Dependent Claim
13 words
The polymer solution of claim 2 wherein said polymer is poly (p-phenylene sulfide).
Claim 5
Dependent Claim
27 words
The polymer solution of claim 1 or 2 or 3 wherein said solvent is fluorosulfonic acid and said dopant solute is the anion derived from fluorosulfonic acid.
Claim 6
Dependent Claim
17 words
The polymer solution of claim 1 or 2 or 3 wherein said solvent is a perfluoroalkylsulfonic acid.
Claim 7
Dependent Claim
13 words
The polymer solution of claim 5 wherein said perfluoroalkylsulfonic acid is trifluoromethylsulfonic acid.
Claim 8
Dependent Claim
22 words
The polymer solution of claim 1 or 2 or 3 wherein said dopant solute anion is derived from a Group VA pentahalide.
Claim 9
Dependent Claim
16 words
The polymer solution of claim 7 wherein said Group VA pentahalide is a Group VA pentafluoride.
Claim 10
Dependent Claim
14 words
The polymer solution of claim 8 wherein said Group VA pentafluoride is arsenic pentafluoride.
References Cited (Backward Citations)
GB1000679A
Cited
US3775177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |