EP0240302A2
Expired / Lapsed
EP
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Aromatic polybenzimidazole and aromatic polyimide compositions and processes of manufacture
Assignee: Celanese Corp
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Filing: 1987-03-31
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Granted: —
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Expires: 2007-03-31
Abstract
Abstract A solvent-free homogenous blended composition comprising 25-40 weight percent polybenzimidazole having an IV in the range of 0.7 to 1.2 and a plugging value greater than 5 and correspondingly 75-60 weight percent polyimide, said composition having a high resistance to solvent.
Inventors
- 👤 Edward C. Chenevey
- 👤 Edward J. Powers
- 👤 Bennett C. Ward
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 12:38
CPC Classifications
C; C08; C08L; C08L79/00; C08L79/04; C08L79/08
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
41 words
A solvent-free homogenous blended composition comprising 25-40 weight percent polybenzimidazole having an IV in the range of 0.7 to 1.2 and a plugging value greater than 5 and correspondingly 75-60 weight percent polyimide, said composition having a high resistance to solvent.
Claim 2
Dependent Claim
41 words
A solvent-free homogenous blended composition comprising 25-40 weight percent polybenzimidazole having an IV in the range of 0.7 to 1.2 and a plugging value greater than 5 and correspondingly 75-60 weight percent polyimide, said composition having a high resistance to solvent.
Claim 3
Dependent Claim
10 words
The composition of claim 1 wherein said polyimide is polyetherimide.
Claim 4
Dependent Claim
15 words
The composition of claim 2 having a single glass transition temperature of at least 270°C.
Claim 5
Dependent Claim
8 words
A fiber having the composition of claim 1.
Claim 6
Dependent Claim
44 words
The fiber of claim 4 having a tenacity of at least 3.5 grams per denier at 25°C, an elongation of at least 25%, and a modulus of at least 65 grams per denier at 25°C, and a glass transition temperature of at least 270°C.
Claim 7
Dependent Claim
8 words
A film having the composition of claim 1.
Claim 8
Dependent Claim
10 words
The film of claim 6 wherein said polyimide is polyetherimide.
Claim 9
Dependent Claim
28 words
The film of claim 7 having a tensile strength of at least 12,000 psi, an elongation of at least 40%, and a modulus of at least 300,000 psi.
Claim 10
Dependent Claim
8 words
A fibrid having the composition of claim 1.
Claim 11
Dependent Claim
97 words
A process which comprises forming a solution of polybenzimidazole and polyimide polymers, and polybenzimidazole having an IV in the range of 0.7 to 1.2 and a plugging value greater than 5 and the concentration of said polybenzimidazole being in the range of 25-40 weight percent of the total polymer concentration in said solution, passing said solution through a spinneret and into a quench zone, withdrawing fibers from said quench zone, and washing the solvent from said fibers so as to obtain fibers highly resistant to solvent and having a concentration of solvent less than 0.1 weight percent.
Claim 12
Dependent Claim
97 words
A process which comprises forming a solution of polybenzimidazole and polyimide polymers, and polybenzimidazole having an IV in the range of 0.7 to 1.2 and a plugging value greater than 5 and the concentration of said polybenzimidazole being in the range of 25-40 weight percent of the total polymer concentration in said solution, passing said solution through a spinneret and into a quench zone, withdrawing fibers from said quench zone, and washing the solvent from said fibers so as to obtain fibers highly resistant to solvent and having a concentration of solvent less than 0.1 weight percent.
Claim 13
Dependent Claim
18 words
The process of claim 10 wherein said washing comprises a multi-stage countercurrent water washing at an elevated temperature.
Claim 14
Dependent Claim
22 words
The process of claim 10 wherein said washing includes contacting the fiber with an acid solution and subsequently with an alkaline solution.
Claim 15
Dependent Claim
109 words
A process which comprises forming a solution of polybenzimidazole and polyimide polymers, the polybenzimidazole having an IV in the range of 0.7 to 1.2 and a plugging value greater than 5 and the concentration of said polybenzimidazole being in the range of 25-40 weight percent of the total polymer concentration in said solution, passing the solution into a stirred non-solvent for the polybenzimidazole and polyimide, recovering a polymer blend in particulate form from said non-solvent, and washing said particles so as to obtain a uniform polymer blend of polybenzimidazole and polyimide in particulate form highly resistant to solvent and having a solvent concentration of less than 0.1 weight percent.
Claim 16
Dependent Claim
109 words
A process which comprises forming a solution of polybenzimidazole and polyimide polymers, the polybenzimidazole having an IV in the range of 0.7 to 1.2 and a plugging value greater than 5 and the concentration of said polybenzimidazole being in the range of 25-40 weight percent of the total polymer concentration in said solution, passing the solution into a stirred non-solvent for the polybenzimidazole and polyimide, recovering a polymer blend in particulate form from said non-solvent, and washing said particles so as to obtain a uniform polymer blend of polybenzimidazole and polyimide in particulate form highly resistant to solvent and having a solvent concentration of less than 0.1 weight percent.
Claim 17
Dependent Claim
98 words
A process which comprises forming a solution of polybenzimidazole and polyimide polymers, and polybenzimidazole having an IV in the range of 0.7 to 1.2 and a plugging value greater than 5 and the concentration of said polybenzimidazole being in the range of 25-40 weight percent of the total polymer concentration in said solution, passing said solution under air pressure through a nozzle into water, recovering polymer fibrids from said water, and washing said fibrids so as to obtain polybenzimidazole and polyimide blended fibrids highly resistant to solvent and having a solvent concentration of less than 0.1 weight percent.
Claim 18
Dependent Claim
98 words
A process which comprises forming a solution of polybenzimidazole and polyimide polymers, and polybenzimidazole having an IV in the range of 0.7 to 1.2 and a plugging value greater than 5 and the concentration of said polybenzimidazole being in the range of 25-40 weight percent of the total polymer concentration in said solution, passing said solution under air pressure through a nozzle into water, recovering polymer fibrids from said water, and washing said fibrids so as to obtain polybenzimidazole and polyimide blended fibrids highly resistant to solvent and having a solvent concentration of less than 0.1 weight percent.
Claim 19
Dependent Claim
86 words
A process which comprises forming a solution of polybenzimidazole and polyimide polymers, the polybenzimidazole having an IV in the range of 0.7 to 1.2 and a plugging value greater than 5 and the concentration of said polybenzimidazole being in the range of 25-40 weight percent of the total polymer concentration in said solution, casting a film from said solution, and water washing the formed film so as to obtain a film highly resistant to solvent and having a solvent concentration of less than 0.1 weight percent.
Claim 20
Dependent Claim
86 words
A process which comprises forming a solution of polybenzimidazole and polyimide polymers, the polybenzimidazole having an IV in the range of 0.7 to 1.2 and a plugging value greater than 5 and the concentration of said polybenzimidazole being in the range of 25-40 weight percent of the total polymer concentration in said solution, casting a film from said solution, and water washing the formed film so as to obtain a film highly resistant to solvent and having a solvent concentration of less than 0.1 weight percent.
Claim 21
Dependent Claim
18 words
The process of claim 15 wherein said washing comprises a multi-stage countercurrent water washing at an elevated temperature.
Claim 22
Dependent Claim
22 words
The process of claim 15 wherein said washing includes contacting the film with an acid solution and subsequently with an alkaline solution.
References Cited (Backward Citations)
No citation records indexed.
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