US4727131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wholly aromatic mesomorphic polyester amides and the preparation thereof
Assignee: BASF SE
•
Filing: 1986-12-04
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Granted: 1988-02-23
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Expires: 2006-12-04
Abstract
Abstract Wholly aromatic mesomorphic polyester amides which form a liquid-crystalline fiber-forming melt below 320° C. and are composed of (a) from 5 to 35 mol % of repeat units of the formula I ##STR1## (b) from 5 to 15 mol % of repeat units of the formula II ##STR2## (c) a molar amount corresponding to the total amount of components (a) and (b), and, when (e) signifies repeat units of the formula VI or VII, (e) of repeat units of the formula III ##STR3## (d) not less than 10 mol % of repeat units of the formula IV ##STR4## (e) from 2 to 15 mol % of repeat units of the formula V ##STR5## or of the formula VI ##STR6## the repeat units of the formula VI being replaceable in part by repeat units of the formula VII ##STR7## with the proviso that the molar proportions of components (a), (b), (c), (d) and (e) add up to 100 mol % in each case, the preparation thereof and fibers, films, molding and surface coating materials prepared therefrom.
Inventors
- 👤 Hans-Jakob Kock
- 👤 Bernd Hisgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:34
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
163 words
A wholly aromatic mesomorphic polyester amide which forms a liquid-crystalline fiber-forming melt below 320° C. and is composed of (a) from 5 to 35 mol % of repeat units of the formula I ##STR17## (b) from 5 to 15 mol % of repeat units of the formula II ##STR18## (c) a molar amount corresponding to the total amount of components (a) and (b), and, when (e) signifies repeat units of the formula VI or VII, (e) of repeat units of the formula III ##STR19## (d) not less than 10 mol % of repeat units of the formula IV ##STR20## (e) from 2 to 15 mol % of repeat units of the formula V ##STR21## or of the formula VI ##STR22## the repeat units of the formula VI being replaceable in part by repeat units of the formula VII ##STR23## with the proviso that the molar proportions of components (a), (b), (c), (d) and (e) add up to 100 mol % in each case.
Claim 2
Dependent Claim
163 words
A wholly aromatic mesomorphic polyester amide which forms a liquid-crystalline fiber-forming melt below 320° C. and is composed of (a) from 5 to 35 mol % of repeat units of the formula I ##STR17## (b) from 5 to 15 mol % of repeat units of the formula II ##STR18## (c) a molar amount corresponding to the total amount of components (a) and (b), and, when (e) signifies repeat units of the formula VI or VII, (e) of repeat units of the formula III ##STR19## (d) not less than 10 mol % of repeat units of the formula IV ##STR20## (e) from 2 to 15 mol % of repeat units of the formula V ##STR21## or of the formula VI ##STR22## the repeat units of the formula VI being replaceable in part by repeat units of the formula VII ##STR23## with the proviso that the molar proportions of components (a), (b), (c), (d) and (e) add up to 100 mol % in each case.
Claim 3
Dependent Claim
32 words
A wholly aromatic mesomorphic polyester amide as claimed in claim 1, wherein some of the units of the formula I are replaced by repeat units of the formulae VIII and/or IX ##STR24##
Claim 4
Dependent Claim
28 words
A wholly aromatic mesomorphic polyester amide as claimed in claim 1, which contains from 3 to 12 mol % of repeat units of the formula VIII or IX.
Claim 5
Dependent Claim
52 words
A wholly aromatic mesomorphic polyester amide as claimed in claim 1, wherein some of the units of the formula I are replaced by repeat units of the formula X ##STR25## where R is halogen, alkyl of up to 4 carbon atoms (except t-butyl) or phenyl, and n is 1, 2 or 3.
Claim 6
Dependent Claim
26 words
A wholly aromatic mesomorphic polyester amide as claimed in claim 1, which contains from 5 to 15 mol % of repeat units of the formula X.
Claim 7
Dependent Claim
19 words
A wholly aromatic mesomorphic polyester amide as claimed in claim 1, which has a glass transition temperature >150° C.
Claim 8
Dependent Claim
64 words
A process for preparing a wholly aromatic mesomorphic polyester amide as claimed in claim 1 by reacting the monomers in the form of the underivatized hydroxy, amino and carboxy compounds in a single-stage process and in the molar ratios described in the presence of excess fatty acid anhydride at elevated temperatures and distilling fatty acid anhydride and fatty acid out of the reaction mixture.
Claim 9
Dependent Claim
28 words
A process as claimed in claim 7, wherein the wholly aromatic polyester amide, after the condensation in the melt, is postcondensed in the solid phase at 150°-250° C.
Claim 10
Dependent Claim
14 words
A filament prepared from a wholly aromatic polyester amide as claimed in claim 1.
Claim 11
Dependent Claim
14 words
A fiber prepared from a wholly aromatic polyester amide as claimed in claim 1.
Claim 12
Dependent Claim
14 words
A molding prepared from a wholly aromatic polyester amide as claimed in claim 1.
Claim 13
Dependent Claim
14 words
A film prepared from a wholly aromatic polyester amide as claimed in claim 1.
Claim 14
Dependent Claim
16 words
A surface coating material prepared from a wholly aromatic polyester amide as claimed in claim 1.
References Cited (Backward Citations)
GB1507207A
Cited
US4118372A
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US4330457A
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US4414381A
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US4351917A
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US4351918A
Cited
EP0081900A1
Cited
US4499256A
Cited
US4375530A
Cited
US4564669A
Cited
US4567247A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-22 | 1991-08-24 | 1992-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-22 | 1995-08-24 | 1996-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-22 | 1999-08-24 | 2000-02-23 | $7700.00 | Window Closed / Lapsed |