US4675137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing polyacetylene film
Assignee: Hoxan Corp
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Filing: 1986-09-15
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Granted: 1987-06-23
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Expires: 2006-09-15
Abstract
Abstract A method for producing a polyacetylene film by introducing acetylene gas into a vessel for storing Ziegler-Natta catalyst to polymerize the acetylene gas with the catalyst which comprises a film forming projecting flat section having a film forming flat surface projected from the surface of the Ziegler-Natta catalyst stored in the bottom of the vessel, thereby coating the Ziegler-Natta catalyst on the inner surface of the side wall of the vessel and the film forming flat surface. Thus, the acetylene gas introduced into the vessel is polymerized with the catalyst to produce the polyacetylene film. In this manner, the polyacetylene film having a constant thickness of high quality can be produced with the Ziegler-Natta catalyst of the suitable amount by providing the film forming flat surface even in the bottom of the vessel, thereby improving the production efficiency.
Inventors
- 👤 Junichi Umetsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:04
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/28; B01J19/18; B01J19/1887; C; C08; C08F; C08F38/00; C08F38/02; Y; Y10; Y10S; Y10S526/00; Y10S526/901
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
239 words
A process for the catalytic film polymerization of a gaseous monomer, comprising the steps of: (a) placing a quantity of catalyst along a perimeter area of a bottom portion of a polymerization apparatus, said apparatus including: (1) a polymerization vessel having an interior surface defining a sidewall portion and said bottom portion; (2) means for retaining a quantity of liquid catalyst in said bottom portion along said perimeter area of said bottom portion; (3) a raised portion projecting from a central area of said bottom portion and having a flat upper surface extending from a liquid surface of said liquid catalyst; (4) means for feeding a monomer gas to said vessel; and (5) means for coating said catalyst along said interior surface and said upper surface of said raised portion, forming thereby a catalyst film, said monomer gas being polymerized in the presence of said catalyst to produce a polymer film of uniform thickness along said interior surface and said upper surface of said raised portion; (b) forming a first catalyst film on said flat upper surface of said raised portion; (c) rotating said polymerization vessel to spread said catalyst along said interior surface, thereby forming a second catalyst film; (d) stopping said rotation; (e) feeding gas to said polymerization vessel; and (f) polymerizing said monomer gas in the presence of said catalyst to form a polymer film of uniform thickness along said interior surface and said upper surface.
Claim 2
Dependent Claim
239 words
A process for the catalytic film polymerization of a gaseous monomer, comprising the steps of: (a) placing a quantity of catalyst along a perimeter area of a bottom portion of a polymerization apparatus, said apparatus including: (1) a polymerization vessel having an interior surface defining a sidewall portion and said bottom portion; (2) means for retaining a quantity of liquid catalyst in said bottom portion along said perimeter area of said bottom portion; (3) a raised portion projecting from a central area of said bottom portion and having a flat upper surface extending from a liquid surface of said liquid catalyst; (4) means for feeding a monomer gas to said vessel; and (5) means for coating said catalyst along said interior surface and said upper surface of said raised portion, forming thereby a catalyst film, said monomer gas being polymerized in the presence of said catalyst to produce a polymer film of uniform thickness along said interior surface and said upper surface of said raised portion; (b) forming a first catalyst film on said flat upper surface of said raised portion; (c) rotating said polymerization vessel to spread said catalyst along said interior surface, thereby forming a second catalyst film; (d) stopping said rotation; (e) feeding gas to said polymerization vessel; and (f) polymerizing said monomer gas in the presence of said catalyst to form a polymer film of uniform thickness along said interior surface and said upper surface.
Claim 3
Dependent Claim
257 words
A process for the catalytic film polymerization of a gaseous monomer, comprising the steps of: (a) placing a quantity of catalyst along a perimeter area of a bottom portion of a polymerization apparatus, said apparatus including: (1) a polymerization vessel having an interior surface defining a sidewall portion and said bottom portion; (2) means for retaining a quantity of liquid catalyst in said bottom portion along said perimeter area of said bottom portion; (3) a raised portion having a storage recess and projecting from a central area of said bottom portion and having a flat upper surface extending from a liquid surface of said liquid catalyst; (4) means for feeding a monomer gas to said vessel; and (5) means for coating said catalyst along said interior surface and said upper surface of said raised portion, forming thereby a catalyst film, said monomer gas being polymerized in the presence of said catalyst to produce a polymer film of uniform thickness along said interior surface and said upper surface of said raised portion; (b) placing a quantity of catalyst in said storage recess of said upper surface; (c) rotating said polymerization vessel to spread said catalyst along said interior surface from said perimeter, and along said upper surface from said storage recess, forming thereby first and second catalyst films; (d) stopping said rotation; (e) feeding monomer gas to said polymerization vessel; and (f) polymerizing said monomer gas in the presence of said catalyst to form a polymer film of uniform thickness along said interior surface and said upper surface.
Claim 4
Dependent Claim
257 words
A process for the catalytic film polymerization of a gaseous monomer, comprising the steps of: (a) placing a quantity of catalyst along a perimeter area of a bottom portion of a polymerization apparatus, said apparatus including: (1) a polymerization vessel having an interior surface defining a sidewall portion and said bottom portion; (2) means for retaining a quantity of liquid catalyst in said bottom portion along said perimeter area of said bottom portion; (3) a raised portion having a storage recess and projecting from a central area of said bottom portion and having a flat upper surface extending from a liquid surface of said liquid catalyst; (4) means for feeding a monomer gas to said vessel; and (5) means for coating said catalyst along said interior surface and said upper surface of said raised portion, forming thereby a catalyst film, said monomer gas being polymerized in the presence of said catalyst to produce a polymer film of uniform thickness along said interior surface and said upper surface of said raised portion; (b) placing a quantity of catalyst in said storage recess of said upper surface; (c) rotating said polymerization vessel to spread said catalyst along said interior surface from said perimeter, and along said upper surface from said storage recess, forming thereby first and second catalyst films; (d) stopping said rotation; (e) feeding monomer gas to said polymerization vessel; and (f) polymerizing said monomer gas in the presence of said catalyst to form a polymer film of uniform thickness along said interior surface and said upper surface.
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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) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |