US4631205A
Expired / Lapsed
US
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Process for producing coherent films of polyacetylene
Assignee: Dade Behring Inc
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Filing: 1984-10-11
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Granted: 1986-12-23
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Expires: 2004-10-11
Abstract
Abstract A process for producing coherent films of polyactylene is disclosed. A support is contacted with a catalyst comprising an acidic, polar medium containing a transition metal salt, water and a borohydride. The support is then contacted with acetylene gas which forms on the support a coherent film of polyacetylene strongly adherent to the support.
Inventors
- 👤 John W. Eveleigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:23
CPC Classifications
C; C08; C08F; C08F38/00; C08F38/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
79 words
A process for producing coherent films of polyacetylene, comprising: contacting at about -80° C. a chemically inert support with an acidic, active catalyst solution having a pH of 5 or below comprising a transition metal salt, polar medium, water and a borohydride to produce a catalytically active surface; and exposing at a temperature from about -80° C. to about -20° C. the catalytically active surface to acetylene gas whereby coherent films of polyacetylene adherent to the support are produced.
Claim 2
Dependent Claim
79 words
A process for producing coherent films of polyacetylene, comprising: contacting at about -80° C. a chemically inert support with an acidic, active catalyst solution having a pH of 5 or below comprising a transition metal salt, polar medium, water and a borohydride to produce a catalytically active surface; and exposing at a temperature from about -80° C. to about -20° C. the catalytically active surface to acetylene gas whereby coherent films of polyacetylene adherent to the support are produced.
Claim 3
Dependent Claim
23 words
The process of claim 1 wherein the exposure of the catalytically active surface to acetylene gas is carried out at about -80° C.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein the polar medium is selected from the group consisting of lower alkanols, acetone and cyclohexanones.
Claim 5
Dependent Claim
21 words
The process of claim 3 wherein the lower alkanols are selected from the group consisting of methanol, ethanol, propanol, and butanol.
Claim 6
Dependent Claim
30 words
The process of claim 1 wherein the acidity of the active catalyst solution is provided by an acid selected from the group consisting of hydrochloric, hydriodic, hydrobromic and acetic acid.
Claim 7
Dependent Claim
13 words
The process of claim 5 wherein the acid is hydrochloric or acetic acid.
Claim 8
Dependent Claim
25 words
The process of claim 1 wherein the water is used at a concentration from about 1% to about 10% by volume of the polar medium.
Claim 9
Dependent Claim
15 words
The process of claim 7 wherein the water is used at about 2.5% by volume.
Claim 10
Dependent Claim
29 words
The process of claim 8 wherein the medium is made acidic by 0.1N hydrochloric acid or glacial acetic acid within the range of about 0.1% to 2.5% by volume.
Claim 11
Dependent Claim
15 words
The process of claim 9 wherein the acid is used at about 0.5% by volume.
Claim 12
Dependent Claim
15 words
The process of claim 1 wherein the organic borohydride is sodium borohydride or N,N,N,N-tetra-butylammonium borohydride.
Claim 13
Dependent Claim
21 words
The process of claim 1 wherein the transition metal salt is a salt of iron, cobalt, nickel, palladium, platinum, and ruthenium.
Claim 14
Dependent Claim
26 words
The process of claim 12 wherein the salt is selected from the group consisting of Co(NO 3 ) 2 , CoC1 2 and CoSO 4 .
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) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |