GB1272316A - Method for production of thermally stable polyimide fibres - Google Patents
Method for production of thermally stable polyimide fibresInfo
- Publication number
- GB1272316A GB1272316A GB3323269A GB3323269A GB1272316A GB 1272316 A GB1272316 A GB 1272316A GB 3323269 A GB3323269 A GB 3323269A GB 3323269 A GB3323269 A GB 3323269A GB 1272316 A GB1272316 A GB 1272316A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filaments
- carbon atoms
- temperature
- over
- radical
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- 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
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/74—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polycondensates of cyclic compounds, e.g. polyimides, polybenzimidazoles
Abstract
1,272,316. Polyamide acid filaments. TORAY INDUSTRIES Inc. 1 July, 1969 [2,July, 1968], No.33232/69. Heading B5B. [Also in Division C3] Thermally stable filaments are produced by dry or wet spinning solutions of a polyamide acid having a recurring unit represented by the general formula wherein #y/#x < 7/3, R 1 is a tetravalent aromatic radical, the linkages of (1) and (2) are each bonded to the adjacent carbon atoms of the aromatic nucleus similarly to the linkages of (3) and (4), R 2 is a trivalent radical containing at least two carbon atoms, R 3 and R<SP>1</SP> 3 is each a divalent radical containing at least two carbon atoms, R 4 is a tetravalent radical containing at least four carbon atoms, X is -O-, -S-, -COO-, or -NH- and R 5 and R 6 are each hydrogen or an alkyl group or acetyl radical. The resultant filaments are heat-treated before during or after stretching the yarn, the heat treatment being carried out at a temperature above 200‹ C. and in the final stage at a temperature not lower than the temperature at which the ring closing degree of R 5 X and of R 6 X becomes more than 50% after 10 minutes heating. Stretching may be effeeted in one or two stages, using, e:g. hot liquid for the first or early stage and passage over a hot plate for the second stage. The filaments may be formed by extruding a solution of the polymer having a concentration of over 15% by weight into a bath of an aqueous solution containing over 30% by weight of calcium chloride and maintained at a temperature of 50‹ to 120‹ C. The filaments may be formed by dry sprinning a solution of the polymers having a viscosity of more than 800 poise at 25‹ C. The filaments formed may have a recurring ring structure having the general formula wherein R 1 , R 2 , R 3 and R 4 are each as previously defined. #y/#x in this formula may be <7/3, the ring closing degree of X may be more than 50% and the tenacity of the filaments may be higher than 1.5 g/d.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4562468 | 1968-07-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1272316A true GB1272316A (en) | 1972-04-26 |
Family
ID=12724512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3323269A Expired GB1272316A (en) | 1968-07-02 | 1969-07-01 | Method for production of thermally stable polyimide fibres |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1933621A1 (en) |
| FR (1) | FR2012191A1 (en) |
| GB (1) | GB1272316A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115652474A (en) * | 2022-09-28 | 2023-01-31 | 清华大学 | Method for preparing fiber of imide copolymer from amic acid copolymer and fiber prepared thereby |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL39187A (en) * | 1971-04-28 | 1976-02-29 | Du Pont | Polyamide fibers and films and their preparation |
-
1969
- 1969-07-01 GB GB3323269A patent/GB1272316A/en not_active Expired
- 1969-07-02 DE DE19691933621 patent/DE1933621A1/en active Pending
- 1969-07-02 FR FR6922388A patent/FR2012191A1/fr not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115652474A (en) * | 2022-09-28 | 2023-01-31 | 清华大学 | Method for preparing fiber of imide copolymer from amic acid copolymer and fiber prepared thereby |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2012191A1 (en) | 1970-03-13 |
| DE1933621A1 (en) | 1970-02-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| CSNS | Application of which complete specification have been accepted and published, but patent is not sealed |