US4831103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wholly aromatic liquid-crystalline polycondensates
Assignee: BASF SE
•
Filing: 1986-12-04
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Granted: 1989-05-16
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Expires: 2006-12-04
Abstract
Abstract Wholly aromatic liquid-crystalline condensates which form a liquid-crystalline fiber-forming melt below 320° C. and are diphase within the range from the glass transition temperature Tg to the melting point and are composed of (a) not less than 10 mol % of repeat units of the formula I ##STR1## (b) from 5 to 30 mol % of repeat units of the formula II ##STR2## (c) from 0 to 20 mol % of one or more of the repeat units of the formulae III, IV or V ##STR3## (d) from 0 to 20 mol % of one or more of the repeat units of the formulae VI, VII, VIII or IX ##STR4## (e) a molar amount corresponding to the total amount of components (b), (c) and (d) of repeat units of the formula X ##STR5## the mole percentage of components (a), (b), (c), (d) and (e) adding up to 100 mol % in each case, the preparation thereof and filaments, fibers, films, moldings and surface coating prepared therefrom.
Inventors
- 👤 Hans-Jakob Kock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:58
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3804; C09K19/3809; C08; C08G; C08G63/00; C08G63/02; C08G63/60; C08G63/605; C08G69/00; C08G69/44
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
152 words
A wholly aromatic liquid-crystalline polycondensate which forms a liquid-crystalline fiber-forming melt below 320° C. and is diphase within the range from the glass transition temperature Tg to the melting point, composed of (a) not less than 10 mol % of repeat units of the formula I ##STR18## (b) from 5 to 30 mol % of repeat units of the formula II ##STR19## (c) from 0 to 20 mol % of one or more of the repeat units of the formulae III, IV or V ##STR20## (d) from 0 to 20 mol % of one or more of the repeat units of the formulae VI, VII, VIII or IX ##STR21## (e) a molar amount corresponding to the total amount of components (b), (c) and (d) of repeat units of the formula X ##STR22## the mole percentages of components (a), (b), (c), (d) and (e) adding up to 100 mol % in each case.
Claim 2
Dependent Claim
152 words
A wholly aromatic liquid-crystalline polycondensate which forms a liquid-crystalline fiber-forming melt below 320° C. and is diphase within the range from the glass transition temperature Tg to the melting point, composed of (a) not less than 10 mol % of repeat units of the formula I ##STR18## (b) from 5 to 30 mol % of repeat units of the formula II ##STR19## (c) from 0 to 20 mol % of one or more of the repeat units of the formulae III, IV or V ##STR20## (d) from 0 to 20 mol % of one or more of the repeat units of the formulae VI, VII, VIII or IX ##STR21## (e) a molar amount corresponding to the total amount of components (b), (c) and (d) of repeat units of the formula X ##STR22## the mole percentages of components (a), (b), (c), (d) and (e) adding up to 100 mol % in each case.
Claim 3
Dependent Claim
30 words
A wholly aromatic liquid-crystalline polycondensate as claimed in claim 1, wherein a portion of the component of the formula X is replaced by repeat units of the formula XI ##STR23##
Claim 4
Dependent Claim
38 words
A wholly aromatic liquid-crystalline polycondensate as claimed in claim 1, wherein a portion of the component of the formula I is replaced by one or more of the repeat units of the formulae XII, XIII or XIV ##STR24##
Claim 5
Dependent Claim
24 words
A wholly aromatic liquid-crystalline polycondensate as claimed in claim 1, wherein the partially crystalline phase has a melting point ≧240° C. and ≦290° C.
Claim 6
Dependent Claim
32 words
A wholly aromatic liquid-crystalline polycondensate as claimed in claim 1, which is partially crystalline after cooling down the melt at a rate of ≧300° C./min to below the glass transition temperature Tg.
Claim 7
Dependent Claim
13 words
A filament prepared from a wholly aromatic polycondensate as claimed in claim 1.
Claim 8
Dependent Claim
13 words
A fiber prepared from a wholly aromatic polycondensate as claimed in claim 1.
Claim 9
Dependent Claim
13 words
A film prepared from a wholly aromatic polycondensate as claimed in claim 1.
Claim 10
Dependent Claim
13 words
A molding prepared from a wholly aromatic polycondensate as claimed in claim 1.
Claim 11
Dependent Claim
14 words
A surface coating prepared from a wholly aromatic polycondensate as claimed in claim 1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |