MX9702304A - Procedimiento para la preparacion de filamentos y fibras de polibenzazol. - Google Patents
Procedimiento para la preparacion de filamentos y fibras de polibenzazol.Info
- Publication number
- MX9702304A MX9702304A MX9702304A MX9702304A MX9702304A MX 9702304 A MX9702304 A MX 9702304A MX 9702304 A MX9702304 A MX 9702304A MX 9702304 A MX9702304 A MX 9702304A MX 9702304 A MX9702304 A MX 9702304A
- Authority
- MX
- Mexico
- Prior art keywords
- filament
- contacting
- dope
- polyphosphoric acid
- base
- Prior art date
Links
Classifications
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Artificial Filaments (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
Se describe un procedimiento continuo para remover ácido polifosforico de un filamento de material absorbente de polibenzazol, el cual comprende: a) poner en contacto el filamento de material absorbente con agua o una mezcla de agua y ácido polifosforico, bajo condiciones suficientes para reducir el contenido de fosforo del filamento a menos de 10,000 ppm en peso; y después, b) poner en contacto el filamento de material absorbente con una solucion acuosa de una base inorgánica, bajo condiciones suficientes para convertir por lo menos 50% de los grupos de ácido polifosforico presentes en el filamento a una sal de la base y el ácido. Se ha descubierto que poniendo en contacto el filamento de material absorbente con una solucion de una base, después de lavar el filamento para remover la mayor parte del fosforo residual, después de lavar el filamento para remover la mayor parte del fosforo residual, ventajosamente conduce a una mejora en la resistencia inicial a la tension del filamento, así como una retencion mejorada de la resistencia a la tension y/o el peso molecular (del polímero de polibenzazol) después de exponerse a la luz y/o a altas temperaturas.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US31626694A | 1994-09-30 | 1994-09-30 | |
US316266 | 1994-09-30 | ||
US08500651 | 1995-07-12 | ||
US08/500,651 US5525638A (en) | 1994-09-30 | 1995-07-12 | Process for the preparation of polybenzazole filaments and fibers |
PCT/US1995/011229 WO1996010661A1 (en) | 1994-09-30 | 1995-09-08 | Process for the preparation of polybenzazole filaments and fibres |
Publications (2)
Publication Number | Publication Date |
---|---|
MXPA97002304A MXPA97002304A (es) | 1997-06-01 |
MX9702304A true MX9702304A (es) | 1997-06-28 |
Family
ID=26980332
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MX9702304A MX9702304A (es) | 1994-09-30 | 1995-09-08 | Procedimiento para la preparacion de filamentos y fibras de polibenzazol. |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0783603B1 (es) |
CN (1) | CN1159836A (es) |
CA (1) | CA2199514A1 (es) |
DE (1) | DE69513844T2 (es) |
MX (1) | MX9702304A (es) |
WO (1) | WO1996010661A1 (es) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE364743T1 (de) * | 2000-04-28 | 2007-07-15 | Toyo Boseki | Polybenzazolfaser und ihre verwendung |
DE50215006D1 (de) * | 2001-11-23 | 2011-05-26 | Inventio Ag | Aufzug mit riemenartigem Übertragungsmittel, insbesondere mit Keilrippen-Riemen, als Tragmittel und/oder Treibmittel |
CA2490025A1 (en) * | 2002-06-26 | 2004-01-08 | Toyo Boseki Kabushiki Kaisha | Polybenzazole fiber and use thereof |
US7189346B2 (en) | 2004-07-22 | 2007-03-13 | E. I. Du Pont De Nemours And Company | Polybenzazole fibers and processes for their preparation |
DE602006019572D1 (de) * | 2005-03-28 | 2011-02-24 | Du Pont | Heisse oberflächen-hydrolyse von polyphosphorsäure in spun-garnen |
DE602006019573D1 (en) * | 2005-03-28 | 2011-02-24 | Du Pont | Fusionsfreie hydrolyse von polyphosphorsäure in multifilament-spun-garnen |
KR20080034830A (ko) * | 2005-03-28 | 2008-04-22 | 이 아이 듀폰 디 네모아 앤드 캄파니 | 측쇄 히드록실 기 및 양이온을 가진 폴리아렌아졸 중합체섬유 |
WO2006105226A1 (en) | 2005-03-28 | 2006-10-05 | E. I. Du Pont De Nemours And Company | Process for hydrolyzing polyphosphoric acid in a spun yarn |
JP4769290B2 (ja) * | 2005-03-28 | 2011-09-07 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | 繊維またはヤーンから燐を除去する方法 |
US7888457B2 (en) * | 2005-04-01 | 2011-02-15 | E. I. Du Pont De Nemours And Company | Process for removing phosphorous from a fiber or yarn |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5273703A (en) * | 1992-08-13 | 1993-12-28 | The Dow Chemical Company | Process for post-spin finishing of polybenzoxazole fibers |
US5292469A (en) * | 1993-01-05 | 1994-03-08 | The Dow Chemical Company | Process for coagulation, washing and leaching of shaped polybenzazole articles |
US5393478A (en) * | 1993-08-20 | 1995-02-28 | The Dow Chemical Company | Process for coagulation and washing of polybenzazole fibers |
-
1995
- 1995-09-08 MX MX9702304A patent/MX9702304A/es not_active Application Discontinuation
- 1995-09-08 CA CA 2199514 patent/CA2199514A1/en not_active Abandoned
- 1995-09-08 EP EP95931706A patent/EP0783603B1/en not_active Expired - Lifetime
- 1995-09-08 WO PCT/US1995/011229 patent/WO1996010661A1/en active IP Right Grant
- 1995-09-08 CN CN 95195398 patent/CN1159836A/zh active Pending
- 1995-09-08 DE DE69513844T patent/DE69513844T2/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CA2199514A1 (en) | 1996-04-11 |
CN1159836A (zh) | 1997-09-17 |
DE69513844T2 (de) | 2000-07-27 |
DE69513844D1 (de) | 2000-01-13 |
WO1996010661A1 (en) | 1996-04-11 |
EP0783603A1 (en) | 1997-07-16 |
EP0783603B1 (en) | 1999-12-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FA | Abandonment or withdrawal |