US4722993A
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: 1988-02-02
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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 3 to 30 mol % of repeat units of the formula ##STR1## (b) from 3 to 25 mol % of one or more of the repeat units of the formulae II, III and IV ##STR2## (c) a molar amount corresponding to the total amount of components (a) and (b) of repeat units of the formulae V and/or VI ##STR3## (d) repeat units of the formula VII ##STR4## (e) if desired from 5 to 25 mol % of repeat units of the formula VIII ##STR5## the mole percentages of components (a), (b), (c), (d) and (e) adding up to 100 mol % in each case, and the preparation and use thereof.
Inventors
- 👤 Bernd Hisgen
- 👤 Michael Portugall
- 👤 Hans-Josef Sterzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:17
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44; C08G69/02; C08G69/26; C08G69/32
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
126 words
A wholly aromatic mesomorphic polyestr amide which forms a liquid-crystalline fiber-forming melt below 320° C. and is composed of (a) from 3 to 30 mol % of repeat units of the formula I ##STR16## (b) from 3 to 25 mol % of one or more of the repeat units of the formulae II, III and IV ##STR17## (c) a molar amount corresponding to the total amount of components (a) and (b) of repeat units of the formulae V and/or VI ##STR18## (d) repeat units of the formula VII ##STR19## (e) if desired from 5 to 25 mol % of repeat units of the formula VIII ##STR20## the mole percentages of components (a), (b), (c), (d) and (e) adding up to 100 mol % in each case.
Claim 2
Dependent Claim
126 words
A wholly aromatic mesomorphic polyestr amide which forms a liquid-crystalline fiber-forming melt below 320° C. and is composed of (a) from 3 to 30 mol % of repeat units of the formula I ##STR16## (b) from 3 to 25 mol % of one or more of the repeat units of the formulae II, III and IV ##STR17## (c) a molar amount corresponding to the total amount of components (a) and (b) of repeat units of the formulae V and/or VI ##STR18## (d) repeat units of the formula VII ##STR19## (e) if desired from 5 to 25 mol % of repeat units of the formula VIII ##STR20## the mole percentages of components (a), (b), (c), (d) and (e) adding up to 100 mol % in each case.
Claim 3
Dependent Claim
85 words
A wholly aromatic mesomorphic polyester amide as claimed in claim 1, composed of (a) from 5 to 25 mol % of repeat units of the formula I, (b) from 5 to 20 mol % of one or more of the repeat units of formulae II, III and IV (c) a molar amount corresponding to the total amount of components (a) and (b) of repeat units of the formulae V and/or VI, (d) not less than 20 mol % of repeat units of the formula VII.
Claim 4
Dependent Claim
38 words
A wholly aromatic mesomorphic polyester amide as claimed in claim 1, composed of repeat units of the formulae I, II and/or III and repeat units of the formula V or VI and repeat units of the formula VII.
Claim 5
Dependent Claim
20 words
A wholly aromatic mesomorphic polyester amide as claimed in claim 1, which has a glass transition temperature Tg >140° C.
Claim 6
Dependent Claim
62 words
A process for preparing a wholly aromatic mesomorphic polyester amide as claimed in claim 1 by reacting the monomers in the form of underivatized hydroxyamino and carboxy compounds in a single-stage process and in the molar ratios described in the presence of excess fatty acid anhydride at elevated temperature and distilling fatty acid anhydride and fatty acid out of the reaction mixture.
Claim 7
Dependent Claim
28 words
A process as claimed in claim 5, wherein the wholly aromatic polyester amide, after the condensation in the melt, is postcondensed in the solid phase at 150°-250° C.
Claim 8
Dependent Claim
11 words
A fiber from a polyester amide as claimed in claim 1.
Claim 9
Dependent Claim
11 words
A film from a polyester amide as claimed in claim 1.
Claim 10
Dependent Claim
11 words
A molding from a polyester amide 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) | 1991-02-01 | 1991-08-03 | 1992-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-01 | 1995-08-03 | 1996-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-01 | 1999-08-03 | 2000-02-02 | $7700.00 | Window Closed / Lapsed |