US3746560A - Oxidized carbon fibers - Google Patents
Oxidized carbon fibers Download PDFInfo
- Publication number
- US3746560A US3746560A US00128166A US3746560DA US3746560A US 3746560 A US3746560 A US 3746560A US 00128166 A US00128166 A US 00128166A US 3746560D A US3746560D A US 3746560DA US 3746560 A US3746560 A US 3746560A
- Authority
- US
- United States
- Prior art keywords
- fiber
- carbon fibers
- fibers
- composite
- carbon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229920000049 Carbon (fiber) Polymers 0.000 title abstract description 18
- 239000004917 carbon fiber Substances 0.000 title abstract description 18
- 239000002131 composite material Substances 0.000 abstract description 24
- 239000011347 resin Substances 0.000 abstract description 7
- 229920005989 resin Polymers 0.000 abstract description 7
- XTEGARKTQYYJKE-UHFFFAOYSA-N chloric acid Chemical class OCl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-N 0.000 abstract description 5
- 238000003763 carbonization Methods 0.000 abstract description 3
- 150000007522 mineralic acids Chemical class 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 25
- 238000000034 method Methods 0.000 description 13
- 239000000243 solution Substances 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 239000002253 acid Substances 0.000 description 6
- BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical compound CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
- 230000001590 oxidative effect Effects 0.000 description 5
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 229940005989 chlorate ion Drugs 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- 229920000297 Rayon Polymers 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Substances OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 239000002964 rayon Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 229940005991 chloric acid Drugs 0.000 description 2
- 239000000805 composite resin Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 description 1
- KUBDPQJOLOUJRM-UHFFFAOYSA-N 2-(chloromethyl)oxirane;4-[2-(4-hydroxyphenyl)propan-2-yl]phenol Chemical compound ClCC1CO1.C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 KUBDPQJOLOUJRM-UHFFFAOYSA-N 0.000 description 1
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000003413 degradative effect Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 150000002924 oxiranes Chemical class 0.000 description 1
- 125000004334 oxygen containing inorganic group Chemical group 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/06—Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F11/00—Chemical after-treatment of artificial filaments or the like during manufacture
- D01F11/10—Chemical after-treatment of artificial filaments or the like during manufacture of carbon
- D01F11/12—Chemical after-treatment of artificial filaments or the like during manufacture of carbon with inorganic substances ; Intercalation
- D01F11/121—Halogen, halogenic acids or their salts
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F11/00—Chemical after-treatment of artificial filaments or the like during manufacture
- D01F11/10—Chemical after-treatment of artificial filaments or the like during manufacture of carbon
- D01F11/12—Chemical after-treatment of artificial filaments or the like during manufacture of carbon with inorganic substances ; Intercalation
- D01F11/122—Oxygen, oxygen-generating compounds
Definitions
- Composite materials for use in the aerospace industry, are well-known to the art.
- Such materials comprise a resinous binder, as for example a polymerized epoxide and a filler, as for example asbestos, glass fibers, or carbon fibers.
- carbon fibers have received attention due to their high corrosion and temperature resistance, low density, high tensile strength and high modulus of elasticity.
- carbon-fiber reinforced composites include aerospace structure components, rocket motor casings, deep submergence vehicles, and ablative materials for heat shields on re-entry vehicles.
- the primary structural properties of fiber-resin composites improve as carbon fiber content is increased from about 10 to about 65 volume percent, then decrease as the fiber content exceeds that figure.
- the preferred range of carbon fiber content is about 45 to 65 volume percent of fiber content is about 45 to 65 volume percent of fiber in the fabricated composite.
- High modulus composites usually have low shear strengths parallel to the direction of the fibers of about 3000 to 4000 p.s.i. These low shear strengths are probably due to poor bonding between the carbon fibers and the matrix. Attempts to improve this bonding, particularly between rayon-based carbon fiber fillers and an epoxy resin matrix have been partially successful, but have resulted in a degradation of the ultimate tensile strength of the fiber and also of the fabricated composite.
- Improved bonding has been accomplished by plating the fiber with various metals, as for example tantalum, with metal carbides, as for example whiskers of silicon carbide, and with nitrides.
- carbon fibers of acrylic origin are surface oxidized after carbonization by contacting the fibers with an about 2 N to about 6 N aqueous solution of an oxygen-containing mineral acid containing from about 5 to about 20 weight percent sodium chlorate or equivalent chlorate ion concentration derived from a soluble chlorate salt for up to about 30 minutes at the refiuxing temperature of the solution.
- High modulus acrylic-based carbon fibers useful for this invention are defined as those fibers possessing a tensile strength of greater than 10 p.s.i. and a Youngs modulus greater than 20 l0 p.s.i.
- Such fibers can be prepared by the method of Shindo, Studies in Graphite Fiber Report No. 317 of the Government Research Industrial Institute, Osaka, Japan, 1961, and Tsunoda, US. 3,285,868.
- acrylic-fibers can be stretched to about 50 to 100 percent or more of their original length while heating in the presence of water or steam to about 100 C., oxidized in an oxidizing atmosphere at about 200 to 300 C.
- Fibers prepared by the above disclosed method can be treated by the process of this invention to prepare composites of superior shear strength.
- carbon fibers prepared by the above-described or similar method are contacted with an about 2 to about 6 Normal aqueous solution of a substantially fully inonizable inorganic oxy-acid and containing about 5 to about 20 weight percent of sodium chlorate or an equivalent chlorate ion concentration derivable from chloric acid or from any water soluble salt thereof.
- the inorganic oxy-acids useful for the method of this invention include sulfuric acid, phosphoric acid, nitric acid, and the like.
- Soluble salts of chloric acid suitable for use in the process of this invention include the potassium salt, lithium salt, calcium salt, ammonium salt, and the like in addition to the above-mentioned sodium salt.
- the solution is maintained at about the boiling point thereof while the fiber is being contacted therewith. At this temperature, a
- the fiber is contacted with a 6 N aqueous solution of sulfuric acid containing about 10 to about 15 weight percent of sodium chlorate for about 8 to about 12 minutes at the boiling point of the solution.
- the physical properties if the prepared composite including tensile, compression, and shear strengths, are measured by methods also well known in the art. More specifically, in order to prepare test composites, the fiber is wound onto a 7 inch diameter drum which contains an exterior 0.005 inch Teflon sheet coating. A transverse guide driven at a constant rate based on yarn diameter to provide parallel alignment of the yarn without voids or overlap of the fibers. While winding, a solution of 38 weight percent epoxy resin (Shell Epon 826) 12 weight percent meta-phenylenediamine (E. I.
- Such tape is cut into appropriately dimensioned segments and the segments are stacked into a Teflon-lined mold, aligning the fibers, until an amount needed to form a 0.12 inch thick composite bar has been accumulated.
- the mold containing the stacked tapes is placed in a heated-platen press, held under a pressure of millimeters of mercury for one hour, then heated at 100 C. for 2 hours under a pressure of 300 p.s.i.g. and at 200 C. for one hour under the same pressure to effect cure.
- the cured composite is tested for fiexural strength, flexural modulus, tensile strength, tensile modulus, volume percent of fiber, shear strength, and density.
- a sample composite bar is loaded in a three-point configuration on a 2 inch span (the supports and loading surfaces being the radial faces of 0.5 inch diameter steel pins). Stress is applied until failure, giving a linear stress-strain curve from which the flexural strength and flexural modulus of the composite can be calculated.
- a second sample of the composite is loaded in a three-point configuration on 0.4 inch centers consisting of the radial surfaces of 0.375 inch diameter steel pins, providing a length to depth ratio of 3.3: 1. The bar is flexed to failure.
- transverse failure showing a sharp peak in the stress-strain curve at the failure point results from high shear properties in conjunction with relatively lower tensile strength properties of the yarn.
- Shear strength values obtained with transverse failure of this type are not true indications of interlaminar shear strength but are minimum values since the tensile strength of the bar failed before a true shear failure is attained.
- a method of treating carbon fibers which comprises contacting the fiber with an aqueous solution containing about 5 to about 20 percent by weight of sodium chlorate or an equivalent concentration of chlorate ion and about 2 to about 6 Normal substantially fully ionizable inorganic oxy-acid at the refluxing temperature of the solution at normal sea level atmospheric pressure for about 8 to about 12 minutes.
- a method of claim 1 which comprises contacting the fiber with an aqueous solution containing about 10 to about 15 percent by Weight of sodium chlorate or an equivalent concentration of chlorate ion and about 2 to 6 Normal substantially fully ionizable inorganic oxy-acid at the refluxing temperature of the solution at normal sea level atmospheric pressure for about 8 to about 12. minutes.
Abstract
Description
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12816671A | 1971-03-25 | 1971-03-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3746560A true US3746560A (en) | 1973-07-17 |
Family
ID=22433965
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00128166A Expired - Lifetime US3746560A (en) | 1971-03-25 | 1971-03-25 | Oxidized carbon fibers |
Country Status (1)
Country | Link |
---|---|
US (1) | US3746560A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3894884A (en) * | 1972-08-28 | 1975-07-15 | Celanese Corp | Process for the enhancement of low modulus carbon fibers |
US3976746A (en) * | 1974-06-06 | 1976-08-24 | Hitco | Graphitic fibers having superior composite properties and methods of making same |
US4001382A (en) * | 1974-02-04 | 1977-01-04 | Japan Exlan Company Limited | Process for producing carbon fibers having excellent physical properties |
US4073869A (en) * | 1975-06-05 | 1978-02-14 | Celanese Corporation | Internal chemical modification of carbon fibers to yield a product of reduced electrical conductivity |
EP0057492A2 (en) * | 1981-01-05 | 1982-08-11 | BASF Aktiengesellschaft | Process for the surface modification of carbon fibres |
US4411880A (en) * | 1982-05-17 | 1983-10-25 | Celanese Corporation | Process for disposing of carbon fibers |
US4472541A (en) * | 1982-10-01 | 1984-09-18 | The Bendix Corporation | Secondary matrix reinforcement using carbon microfibers |
US4637925A (en) * | 1984-06-22 | 1987-01-20 | Toray Industries, Inc. | Ultrahigh strength carbon fibers |
US5271917A (en) * | 1989-09-15 | 1993-12-21 | The United States Of America As Represented By The Secretary Of The Air Force | Activation of carbon fiber surfaces by means of catalytic oxidation |
US5965470A (en) * | 1989-05-15 | 1999-10-12 | Hyperion Catalysis International, Inc. | Composites containing surface treated carbon microfibers |
US20040219092A1 (en) * | 1992-01-15 | 2004-11-04 | Bening Robert C. | Surface treatment of carbon microfibers |
US20100136866A1 (en) * | 2008-12-02 | 2010-06-03 | Gm Global Technology Operations, Inc. | Laminated composites and methods of making the same |
US20110033813A1 (en) * | 2006-08-24 | 2011-02-10 | David Baughman | Anchor apparatus and method for orthodontic appliances |
-
1971
- 1971-03-25 US US00128166A patent/US3746560A/en not_active Expired - Lifetime
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3894884A (en) * | 1972-08-28 | 1975-07-15 | Celanese Corp | Process for the enhancement of low modulus carbon fibers |
US4001382A (en) * | 1974-02-04 | 1977-01-04 | Japan Exlan Company Limited | Process for producing carbon fibers having excellent physical properties |
US3976746A (en) * | 1974-06-06 | 1976-08-24 | Hitco | Graphitic fibers having superior composite properties and methods of making same |
US4073869A (en) * | 1975-06-05 | 1978-02-14 | Celanese Corporation | Internal chemical modification of carbon fibers to yield a product of reduced electrical conductivity |
EP0057492A2 (en) * | 1981-01-05 | 1982-08-11 | BASF Aktiengesellschaft | Process for the surface modification of carbon fibres |
EP0057492A3 (en) * | 1981-01-05 | 1983-11-16 | Celanese Corporation | Process for the surface modification of carbon fibres |
US4411880A (en) * | 1982-05-17 | 1983-10-25 | Celanese Corporation | Process for disposing of carbon fibers |
US4472541A (en) * | 1982-10-01 | 1984-09-18 | The Bendix Corporation | Secondary matrix reinforcement using carbon microfibers |
US4637925A (en) * | 1984-06-22 | 1987-01-20 | Toray Industries, Inc. | Ultrahigh strength carbon fibers |
USRE33537E (en) * | 1984-06-22 | 1991-02-12 | Toray Industries, Inc. | Ultrahigh strength carbon fibers |
US5965470A (en) * | 1989-05-15 | 1999-10-12 | Hyperion Catalysis International, Inc. | Composites containing surface treated carbon microfibers |
US5271917A (en) * | 1989-09-15 | 1993-12-21 | The United States Of America As Represented By The Secretary Of The Air Force | Activation of carbon fiber surfaces by means of catalytic oxidation |
US20040219092A1 (en) * | 1992-01-15 | 2004-11-04 | Bening Robert C. | Surface treatment of carbon microfibers |
US20070280874A1 (en) * | 1992-01-15 | 2007-12-06 | Hyperion Catalysis International, Inc. | Surface treatment of carbon microfibers |
US7410628B2 (en) | 1992-01-15 | 2008-08-12 | Hyperion Catalysis International, Inc. | Surface treatment of carbon microfibers |
US20080199387A1 (en) * | 1992-01-15 | 2008-08-21 | Hyperion Catalysis International, Inc. | Surface Treatment of Carbon Microfibers |
US7862794B2 (en) | 1992-01-15 | 2011-01-04 | Hyperion Cataylsis International, Inc. | Surface treatment of carbon microfibers |
US20110033813A1 (en) * | 2006-08-24 | 2011-02-10 | David Baughman | Anchor apparatus and method for orthodontic appliances |
US20100136866A1 (en) * | 2008-12-02 | 2010-06-03 | Gm Global Technology Operations, Inc. | Laminated composites and methods of making the same |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: MANUFACTURERS HANOVER TRUST COMPANY A NY CORP. Free format text: SECURITY INTEREST;ASSIGNOR:GREAT LAKES CARBON CORPORATION, A DE CORP;REEL/FRAME:004376/0430 Effective date: 19850228 |
|
AS | Assignment |
Owner name: MANUFACTURERS HANOVER TRUST COMPANY, AS AGENT Free format text: SECURITY INTEREST;ASSIGNOR:FORTAFIL FIBERS INC., A CORP. OF DE.;REEL/FRAME:004649/0373 Effective date: 19861219 |
|
AS | Assignment |
Owner name: CHASE MANHATTAN BANK, N.A., THE, AS CO-AGENT Free format text: SECURITY INTEREST;ASSIGNOR:GREAT LAKES CARBON CORPORATION;REEL/FRAME:005016/0550 Effective date: 19890112 Owner name: MANUFACTURERS HANOVER TRUST COMPANY, AS CO-AGENT Free format text: SECURITY INTEREST;ASSIGNOR:GREAT LAKES CARBON CORPORATION;REEL/FRAME:005016/0550 Effective date: 19890112 |
|
AS | Assignment |
Owner name: FORTAFIL FIBERS, INC., A DE CORP. Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:MANUFACTURERS HANOVER TRUST COMPANY;REEL/FRAME:005221/0871 Effective date: 19870724 |
|
AS | Assignment |
Owner name: AKZO N.V., ARNHEM, THE NETHERLANDS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:GREAT LAKES CARBON CORPORATION;REEL/FRAME:005277/0858 Effective date: 19900103 |