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US4499256A
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Anisotropic polyesteramide polymers having improved retention of physical properties at elevated temperatures and methods of manufacture thereof
Assignee: Imperial Chemical Industries Ltd
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Filing: 1982-11-03
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Granted: 1985-02-12
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Expires: 2002-11-03
Abstract
Abstract An anisotropic-melt-forming polymer having improved stiffness retention at elevated temperatures comprising residues selected from residues (A) of dihydric phenols, aromatic dicarboxylic acids, hydroxyaromatic acids, aromatic diamines, aminophenols and aminoaromatic acids wherein at least 40 mole % of the residues (A) have their chain extending bonds in either coaxial or parallel and oppositely directed relationship and sufficient of non-linear residues (B) selected from at least one of: <IMAGE> <IMAGE> <IMAGE> <IMAGE> to give a polymer having an improved retention of stiffness at elevated temperature compared with an otherwise similar polymer not containing said residues (B).
Inventors
- 👤 David J. Blundell
- 👤 Brian P. Griffin
- 👤 William A. MacDonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:50
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
104 words
An anisotropic-melt-forming polyesteramide having improved stiffness retention at elevated temperatures prepared by reacting together reactants selected from (a) dihydric phenols, aromatic dicarboxylic acids, hydroxyaromatic acids, aromatic diamines, aminophenols and aminoaromatic acids and their polyesteramide forming derivatives wherein at least 40 mole % of the reactants (A) have their chain extending bonds in either coaxial or parallel and oppositely directed relationship and sufficient of non-linear reactants (B) selected from reactants containing at least one radical of formula ##STR13## to give a polymer having an improved retention of stiffness at elevated temperatures compared with an otherwise similar polymer not prepared from reactants including said reactants (B).
Claim 2
Dependent Claim
104 words
An anisotropic-melt-forming polyesteramide having improved stiffness retention at elevated temperatures prepared by reacting together reactants selected from (a) dihydric phenols, aromatic dicarboxylic acids, hydroxyaromatic acids, aromatic diamines, aminophenols and aminoaromatic acids and their polyesteramide forming derivatives wherein at least 40 mole % of the reactants (A) have their chain extending bonds in either coaxial or parallel and oppositely directed relationship and sufficient of non-linear reactants (B) selected from reactants containing at least one radical of formula ##STR13## to give a polymer having an improved retention of stiffness at elevated temperatures compared with an otherwise similar polymer not prepared from reactants including said reactants (B).
Claim 3
Dependent Claim
21 words
An anisotropic-melt-forming polymer according to claim 1 wherein the concentration of non-linear reactants (B) is between 5 and 50 mole %.
Claim 4
Dependent Claim
21 words
An anisotropic-melt-forming polymer according to claim 2 wherein the concentration of non-linear reactants (B) is between 10 and 40 mole %.
Claim 5
Dependent Claim
49 words
An anisotropic-melt-forming polymer according to claims 1, 2 or 3 wherein the reactants other than the non-linear reactants are hydroxyaromatic acids and optionally, aromatic dicarboxylic acids and/or diphenols the reactants other than the non-linear reactants having their chain extending bonds in either coaxial or parallel and oppositely directed relationship.
Claim 6
Dependent Claim
24 words
An anisotropic-melt-forming polymer according to claims 1, 2 or 3 wherein the reactants other than the non-linear residues are aromatic dicarboxylic acids and diphenols.
Claim 7
Independent Claim
89 words
A method of producing an anisotropic-melt-forming polymer having improved stiffness retention at elevated temperatures comprising reacting at least 40 mole % of polyesteramide forming reactants selected from dihydric phenols, aromatic dicarboxylic acids, hydroxyaromatic acids, aromatic diamines, aminophenols and aminoaromatic acids having their chain extending bonds in either coaxial or parallel and oppositely directed relationship with sufficient non-linear reactants selected from those containing the divalent radicals: ##STR14## to give a polymer of improved retention of stiffness at elevated temperatures compared with an otherwise similar polymer not containing the non-linear reactants.
Claim 8
Independent Claim
89 words
A method of producing an anisotropic-melt-forming polymer having improved stiffness retention at elevated temperatures comprising reacting at least 40 mole % of polyesteramide forming reactants selected from dihydric phenols, aromatic dicarboxylic acids, hydroxyaromatic acids, aromatic diamines, aminophenols and aminoaromatic acids having their chain extending bonds in either coaxial or parallel and oppositely directed relationship with sufficient non-linear reactants selected from those containing the divalent radicals: ##STR14## to give a polymer of improved retention of stiffness at elevated temperatures compared with an otherwise similar polymer not containing the non-linear reactants.
Claim 9
Dependent Claim
134 words
A method according to claim 6 wherein the non-linear reactant containing the divalent radical: ##STR15## is selected from reactants of formula: HO--R.sub.1 --NH.sub.2, NH.sub.2 --R.sub.2 --NH.sub.2, and HOOC--R.sub.3 --NH.sub.2, and their polymerisable derivatives, where R 1 , R 2 and R 3 , which may be the same or different, are selected from: ##STR16## where X is a direct link or is selected from --O--, >CO, >CH 2 , >SO 2 , >C(CH 3 ) 2 or phenylene radicals, and an amino group is present in the meta position with respect to the other chain extending bond in the case of the single ring compounds and in the case of the multiple ring systems is in the meta position with respect to the outgoing bond linked to X or linked directly to the ring.
Claim 10
Dependent Claim
62 words
A method according to claim 6 wherein the non-linear --SO 2 -- containing reactants are selected from reactants of formula: ##STR17## where A and B may be the same or different and are selected from --OH, --NH 2 , --COOH, --Q--OH, --QNH 2 and --Q--COOH, where Q may be a phenylene radical or a radical of formula: ##STR18## and polymerisable derivatives thereof.
Claim 11
Independent Claim
33 words
A method according to claims 6, 7 or 8 wherein the reactants other than the non-linear reactants are selected from hydroxy aromatic acids, optionally in the presence of aromatic dicarboxylic acids and/or diphenols.
Claim 12
Independent Claim
25 words
A method according to claims 6, 7 or 8 wherein the reactants other than the non-linear reactants are selected from aromatic dicarboxylic acids and diphenols.
Claim 13
Dependent Claim
18 words
Shaped articles having improved stiffness retention at elevated temperatures when formed from a polymer according to 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) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |