Patent US3852429A successfully refreshed from Google Patents.
US3852429A
Expired / Lapsed
US
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Method for production of shaped carbon articles
Assignee: Kureha Corp
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Filing: 1973-04-09
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Granted: 1974-12-03
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Expires: 1993-04-09
Abstract
Abstract Shaped carbon articles can be manufactured by first shaping vinylidene fluoride homopolymer or copolymers of vinylidene fluoride and fluorine-containing olefin with vinylidene fluoride as its principal constituent into desired forms, crosslinking the shaped polymer by a chemical reaction to render it infusible, and then carbonizing the same by heat-treatment.
Inventors
- 👤 N Murayama
- 👤 T Katto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:09
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; B; B29; B29C; B29C71/00; B29C71/02; C01; C01B; C01B32/00; C01B32/30; C01B32/354; C01B32/384; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/524; D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; D01F9/14; D01F9/20; D01F9/21; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/16
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
160 words
A METHOD FOR PRODUCING A SHAPED CARBON ARTICLE FROM A SHAPED POLYMER WHILE RETAINING THE ORIGINAL SHAPE OF THE SHAPED POLYMER, WHICH COMPRISES THE STEPS OF: A. SUBJECTING A SHAPED BODY OF A POLYMER MATERIAL SELECTED FROM THE GROUP CONSISTING OF A VINYLIDENE FLUORIDE HOMOPOLYMER AND COPOLYMERS THEREOF, CONTAINING VINYLIDENE FLUORIDE AS THE PRINCIPAL CONSTITUENT, TO A PRETREATMENT WITH A NUCLEOPHILIC REAGENT SELECTED FROM THE GROUP CONSISTING OF AMMONIA, A LIQUID AMMONIA-SODIUM SYSTEM, ETHYLENE-DIAMINE, N-BUTYLAMINE, AND DI-N-BUTYLAMINE AT A TEMPERATURE OF FROM A ROOM TEMPERATURE TO 90*C FOR A TIME PERIOD UNTIL THE FLUORINE CONTENT OF THE SHAPED BODY IS REDUCED BY 0.5 TO 4.5 PERCENT BY EIGHT WITH RESPECT TO THE WEIGHT OF THE ORIGINAL POLYMER SHAPED BODY; AND B. HEAT-TREATING THE THUS PRETREATED AND INFUSIBILIZED POLYMER SHAPED BODY IN AN INACTIVE GAS ATMOSPHERE BY RAISING THE HEATING TEMPERATURE TO THE MAXIMUM RANGE OF FROM 300* TO 500*C TO REMOVE HYDROGEN FLUORIDE THEREFROM, THEREBY PRODUCNG THE CARBONIZED SHAPED ARTICLE.
Claim 2
Independent Claim
160 words
A METHOD FOR PRODUCING A SHAPED CARBON ARTICLE FROM A SHAPED POLYMER WHILE RETAINING THE ORIGINAL SHAPE OF THE SHAPED POLYMER, WHICH COMPRISES THE STEPS OF: A. SUBJECTING A SHAPED BODY OF A POLYMER MATERIAL SELECTED FROM THE GROUP CONSISTING OF A VINYLIDENE FLUORIDE HOMOPOLYMER AND COPOLYMERS THEREOF, CONTAINING VINYLIDENE FLUORIDE AS THE PRINCIPAL CONSTITUENT, TO A PRETREATMENT WITH A NUCLEOPHILIC REAGENT SELECTED FROM THE GROUP CONSISTING OF AMMONIA, A LIQUID AMMONIA-SODIUM SYSTEM, ETHYLENE-DIAMINE, N-BUTYLAMINE, AND DI-N-BUTYLAMINE AT A TEMPERATURE OF FROM A ROOM TEMPERATURE TO 90*C FOR A TIME PERIOD UNTIL THE FLUORINE CONTENT OF THE SHAPED BODY IS REDUCED BY 0.5 TO 4.5 PERCENT BY EIGHT WITH RESPECT TO THE WEIGHT OF THE ORIGINAL POLYMER SHAPED BODY; AND B. HEAT-TREATING THE THUS PRETREATED AND INFUSIBILIZED POLYMER SHAPED BODY IN AN INACTIVE GAS ATMOSPHERE BY RAISING THE HEATING TEMPERATURE TO THE MAXIMUM RANGE OF FROM 300* TO 500*C TO REMOVE HYDROGEN FLUORIDE THEREFROM, THEREBY PRODUCNG THE CARBONIZED SHAPED ARTICLE.
Claim 3
Dependent Claim
72 words
A method according to claim 1, in which a vinylidene fluoride homopolymer shaped body is employed as the shaped polymer and ammonia is used as the nucleophilic reagent in the pretreatment, said pretreatment being carried out at a reaction temperature of from 50* to 90*C for a time period of from 20 to 50 hours until the fluorine content of the shaped body is reduced to 55 to 58.5 percent by weight.
Claim 4
Dependent Claim
74 words
A method according to claim 1, in which a vinylidene fluoride homopolymer shaped body is employed as the shaped polymer and a liquid ammonia-sodium system is used as the nucleophilic reagent in the pretreatment; said pretreatment is carried out at a temperature of from 50* to 90*C for a time period of from 20 to 50 hours until the fluorine content of the shaped body is reduced to 55 to 58.5 percent by weight.
Claim 5
Dependent Claim
56 words
A method according to claim 1, in which a vinylidene fluoride copolymer shaped body is employed as the shaped polymer and ammonia is used as the nucleophilic reagent in the pretreatment; said pretreatment being carried out at a temperature of from a room temperature to 90*C for a time period of from 20 to 50 hours.
Claim 6
Dependent Claim
60 words
A method according to claim 1, in which a vinylidene fluoride copolymer shaped body is employed as the shaped polymer and a liquid ammonia-sodium system is used as the nucleophilic reagent in the pretreatment; said pretreatment being carried out at a reaction treatment of from a room temperature to 90*C for a time period of from 20 to 50 hours.
Claim 7
Dependent Claim
59 words
A method according to claim 1, in which a vinylidene fluoride homopolymer shaped body is employed as the shaped polymer and ethylene di-amine is used as the nucleophilic reagent in the pretreatment; said pretreatment being carried out at a reaction temperature of from a room temperature to 90*C for a time period of from 20 minutes to 30 hours.
Claim 8
Dependent Claim
58 words
A method according to claim 1, in which a vinylidene fluoride homopolymer shaped body is employed as the shaped polymer and n-butylamine is used as the nucleophilic reagent in the pretreatment; said pretreatment being carried out at a reaction temperature of from a room temperature to 90*C for a time period of from 20 minutes to 30 hours.
Claim 9
Dependent Claim
58 words
A method according to claim 1, in which a vinylidene fluoride homopolymer shaped body is used as the shaped polymer and di-n-butylamine is used as the nucleophilic reagent in the pretreatment; said pretreatment being carried out at a reaction temperature of from a room temperature to 90*C for a time period of from 20 minutes to 30 hours.
Claim 10
Dependent Claim
59 words
A method according to claim 1, in which a vinylidene fluoride copolymer shaped body is employed as the shaped polymer and ethylene di-amine is used as the nucleophilic reagent in the pretreatment; said pretreatment being carried out at A reaction temperature of from a room temperature to 90*C for a time period of from 20 minutes to 30 hours.
Claim 11
Dependent Claim
58 words
A method according to claim 1, in which a vinylidene fluoride copolymer shaped body is employed as the shaped polymer and n-butylamine is used as the nucleophilic reagent in the pretreatment;; said pretreatment being carried out at a reaction temperature of from a room temperature to 90*C for a time period of from 20 minutes to 30 hours.
Claim 12
Dependent Claim
58 words
A method according to claim 1, in which a vinylidene fluoride copolymer shaped body is employed as the shaped polymer and di-n-butylamine is used as the nucleophilic reagent in the pretreatment; said pretreatment being carried out at a reaction temperature of from a room temperature to 90*C for a time period of from 20 minutes to 30 hours.
Claim 13
Dependent Claim
37 words
The method according to claim 1, in which the pretreated shaped body is further heat-treated by raising the temperature to a level between 500* and 3,000*C to vary the electric resistance, adsorption characteristics, and mechanical properties thereof.
References Cited (Backward Citations)
US3258363A
Cited
US3516791A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |