Patent US4356301A successfully refreshed from Google Patents.
US4356301A
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Polyacetylene with anthraquinone system
Assignee: Rohm and Haas Co
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Filing: 1980-12-22
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Granted: 1982-10-26
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Expires: 2000-12-22
Abstract
Abstract A process for reducing polyacetylene oxidation and embrittlement comprises treating the polyacetylene with a solution of (a) a combination of anthraquinone or an anthraquinone salt, a base and a reducing agent; or (b) pyrogallol; or (c) a hydrosulfiprocess for isomerizing cis-polyacetylene at least partly to trans-polyacetylene comprises treating substantially cis-polyacetylene with a solution of a material which is either (a) a combination of anthraquinone or an anthraquinone salt, a base and a reducing agent; (b) pyrogallol; or (c) a hydrosulfite; and mixtures thereof and wherein the solution is at a temperature of from the freezing point to the boiling point of the solution during the treatment of the cis-polyacetylene and thereafter removing the polyacetylene which has been enriched in the trans form from contact with the solution.
Inventors
- 👤 Robert D. Gleim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:33
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/07; C08K5/08; C08K3/00; C08K3/30; C08K5/13
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
65 words
A process for reducing polyacetylene oxidation and embrittlement comprising the steps of treating said polyacetylene with a solution having a pH greater than 7, of a material selected from the class consisting of: (a) A combination of anthraquinone or an anthraquinone salt, a base capable of maintaining a solution pH greater than 7, and a reducing agent capable of reducing anthraquinone or an anthraquinone salt.
Claim 2
Dependent Claim
65 words
A process for reducing polyacetylene oxidation and embrittlement comprising the steps of treating said polyacetylene with a solution having a pH greater than 7, of a material selected from the class consisting of: (a) A combination of anthraquinone or an anthraquinone salt, a base capable of maintaining a solution pH greater than 7, and a reducing agent capable of reducing anthraquinone or an anthraquinone salt.
Claim 3
Dependent Claim
19 words
A process according to claim 1 wherein the anthraquinone concentration in said solution is at least about 0.01 molar.
Claim 4
Dependent Claim
34 words
A process according to claim 1 wherein said base is present in said solution in a mole amount of up to about fifty times the number of moles of anthraquinone or anthraquinone salt present.
Claim 5
Dependent Claim
38 words
A process according to claim 1 wherein said reducing agent is present in said solution in a concentration of at least the amount necessary to react with the anthraquinone or anthraquinone salt which is present in said solution.
Claim 6
Dependent Claim
16 words
A process according to claim 1 wherein the solvent for said material is an aqueous solvent.
Claim 7
Dependent Claim
16 words
A process according to claim 1 wherein the solvent for said material is an organic solvent.
Claim 8
Dependent Claim
13 words
A process according to claim 6 wherein said organic solvent is substantially anhydrous.
Claim 9
Dependent Claim
13 words
A process according to claim 1 wherein said reducing agent is a hydrosulfite.
Claim 10
Dependent Claim
12 words
A process according to claim 1 wherein said polyacetylene is a film.
Claim 11
Dependent Claim
12 words
A process according to claim 1 wherein said polyacetylene is a powder.
Claim 12
Dependent Claim
13 words
A process according to claim 1 wherein said polyacetylene is a foamed material.
Claim 13
Dependent Claim
22 words
A process according to claim 1 wherein the solvent for said material is a combination of water and a water miscible cosolvent.
Claim 14
Dependent Claim
14 words
A process according to claim 1 wherein said reducing agent is a metal hydride.
Claim 15
Dependent Claim
13 words
A process according to claim 1 wherein said base is a metal hydroxide.
Claim 16
Dependent Claim
12 words
A process according to claim 1 wherein said base is sodium hydroxide.
Claim 17
Dependent Claim
13 words
A process according to claim 1 wherein said anthraquinone salt is sodium anthraquinone-alpha-sulfonate.
Claim 18
Dependent Claim
13 words
A process according to claim 1 wherein said anthraquinone salt is sodium anthraquinone-beta-sulfonate.
Claim 19
Dependent Claim
16 words
A process according to claim 1 wherein said anthraquinone salt is an anthraquinone disulfonic acid salt.
Claim 20
Dependent Claim
13 words
A process according to claim 1 wherein said reducing agent is potassium borohydride.
Claim 21
Dependent Claim
13 words
A process according to claim 1 wherein said reducing agent is sodium cyanoborohydride.
Claim 22
Dependent Claim
96 words
A process for isomerizing cis-polyacetylene at least partially to trans-polyacetylene comprising immersing said polyacetylene in a solution having a pH greater than 7, of a material selected from the class consisting of: (a) A combination of anthraquinone or an anthraquinone salt, a base capable of maintaining a solution pH greater than 7, and a reducing agent capable of reducing anthraquinone or an anthraquinone salt, said solution being at a temperature of from the freezing point to the boiling point of the solution during treatment of said cis-polyacetylene whereby the polyacetylene is enriched in the trans form.
Claim 23
Dependent Claim
96 words
A process for isomerizing cis-polyacetylene at least partially to trans-polyacetylene comprising immersing said polyacetylene in a solution having a pH greater than 7, of a material selected from the class consisting of: (a) A combination of anthraquinone or an anthraquinone salt, a base capable of maintaining a solution pH greater than 7, and a reducing agent capable of reducing anthraquinone or an anthraquinone salt, said solution being at a temperature of from the freezing point to the boiling point of the solution during treatment of said cis-polyacetylene whereby the polyacetylene is enriched in the trans form.
Claim 24
Dependent Claim
16 words
A process according to claim 21 wherein said cis-polyacetylene is in the form of a film.
Claim 25
Dependent Claim
16 words
A process according to claim 21 wherein said cis-polyacetylene is in the form of a powder.
Claim 26
Dependent Claim
17 words
A process according to claim 21 wherein said cis-polyacetylene is in the form of a foamed material.
Claim 27
Dependent Claim
16 words
A process according to claim 21 wherein said cis-polyacetylene being isomerized is at least 25% cis-polyacetylene.
Claim 28
Dependent Claim
16 words
A process according to claim 21 wherein said cis-polyacetylene is isomerized to at least 25% trans-polyacetylene.
Claim 29
Dependent Claim
65 words
A process for reducing polyacetylene oxidation and embrittlement comprising the steps of treating said polyacetylene with a solution having a pH greater than 7, of a material which is a combination of anthraquinone or an anthraquinone salt, a base selected from the class consisting of metal hydroxide bases or nitrogenous bases and a reducing agent selected from the class consisting of hydrosulfites and metal hydrides.
Claim 30
Dependent Claim
65 words
A process for reducing polyacetylene oxidation and embrittlement comprising the steps of treating said polyacetylene with a solution having a pH greater than 7, of a material which is a combination of anthraquinone or an anthraquinone salt, a base selected from the class consisting of metal hydroxide bases or nitrogenous bases and a reducing agent selected from the class consisting of hydrosulfites and metal hydrides.
Claim 31
Dependent Claim
12 words
A process according to claim 27 wherein said base is sodium hydroxide.
Claim 32
Dependent Claim
13 words
A process according to claim 27 wherein said reducing agent is potassium borohydride.
Claim 33
Dependent Claim
13 words
A process according to claim 27 wherein said reducing agent is sodium cyanoborohydride.
Claim 34
Dependent Claim
13 words
A process according to claim 27 wherein said reducing agent is sodium dithionite.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-25 | 1986-04-26 | 1986-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-25 | 1990-04-26 | 1990-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-25 | 1994-04-26 | 1994-10-26 | $7700.00 | Window Closed / Lapsed |