US4267289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blend of wholly aromatic polyesters
Assignee: Celanese Corp
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Filing: 1980-07-03
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Granted: 1981-05-12
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Expires: 2000-07-03
Abstract
Abstract A polymer blend which is capable of exhibiting an anisotropic melt phase and which is capable of forming shaped articles which exhibit satisfactory mechanical properties is provided. The polymer blend comprises approximately 5 to approximately 95 percent by weight, based upon the total weight of the blend, of a first melt processable wholly aromatic polyester which is capable of forming an anisotropic melt phase apart from the blend and which comprises not less than approximately 10 mole percent of recurring units which include a naphthalene moiety, and approximately 5 to approximately 95 percent by weight, based upon the total weight of the blend, of a second melt processable wholly aromatic polyester which is capable of forming an anisotropic melt phase apart from the blend (as defined).
Inventors
- 👤 Michael F. Froix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:34
CPC Classifications
C; C08; C08L; C08L67/00
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
214 words
A polymer blend which is capable of exhibiting an anisotropic melt phase and which is capable of forming shaped articles which exhibit satisfactory mechanical properties comprising: (a) approximately 5 to approximately 95 percent by weight, based upon the total weight of components (a) and (b), of a first melt processable wholly aromatic polyester which is capable of forming an anisotropic melt phase apart from said blend and comprises not less than approximately 10 mole percent of recurring units which include a naphthalene moiety, and (b) approximately 5 to approximately 95 percent by weight, based upon the total weight of components (a) and (b), of a second melt processable wholly aromatic polyester which is capable of forming an anisotropic melt phase at a temperature no higher than approximately 320° C. apart from said blend and which consists essentially of the recurring moieties I, II, III, and IV wherein: ##STR9## where R is methyl, chloro, bromo, or mixtures thereof, and is substituted for a hydrogen atom present upon the aromatic ring, and wherein said second wholly aromatic polyester comprises approximately 20 to 60 mole percent of moiety I, approximately 5 to 18 mole percent of moiety II, approximately 5 to 35 mole percent of moiety III, and approximately 20 to 30 mole percent of moiety IV.
Claim 2
Dependent Claim
214 words
A polymer blend which is capable of exhibiting an anisotropic melt phase and which is capable of forming shaped articles which exhibit satisfactory mechanical properties comprising: (a) approximately 5 to approximately 95 percent by weight, based upon the total weight of components (a) and (b), of a first melt processable wholly aromatic polyester which is capable of forming an anisotropic melt phase apart from said blend and comprises not less than approximately 10 mole percent of recurring units which include a naphthalene moiety, and (b) approximately 5 to approximately 95 percent by weight, based upon the total weight of components (a) and (b), of a second melt processable wholly aromatic polyester which is capable of forming an anisotropic melt phase at a temperature no higher than approximately 320° C. apart from said blend and which consists essentially of the recurring moieties I, II, III, and IV wherein: ##STR9## where R is methyl, chloro, bromo, or mixtures thereof, and is substituted for a hydrogen atom present upon the aromatic ring, and wherein said second wholly aromatic polyester comprises approximately 20 to 60 mole percent of moiety I, approximately 5 to 18 mole percent of moiety II, approximately 5 to 35 mole percent of moiety III, and approximately 20 to 30 mole percent of moiety IV.
Claim 3
Dependent Claim
24 words
A polymer blend according to claim 1 wherein said R group of moiety IV of said second wholly aromatic polyester is a methyl group.
Claim 4
Dependent Claim
27 words
A polymer blend according to claim 1 which is capable of undergoing melt processing at a temperature within the range of approximately 260° C. to 350° C.
Claim 5
Dependent Claim
27 words
A polymer blend according to claim 1 which is capable of undergoing melt processing at a temperature within the range of approximately 280° C. to 300° C.
Claim 6
Dependent Claim
41 words
A polymer blend according to claim 1 wherein said first wholly aromatic polyester apart from said blend exhibits an inherent viscosity of at least 2.0 dl./g. when dissolved in a concentration of 0.1 percent by weight in pentafluorophenol at 60° C.
Claim 7
Dependent Claim
40 words
A polymer blend according to claim 1 wherein said second wholly aromatic polyester apart from said blend exhibits an inherent viscosity of at least 2.0 dl./g. when dissolved in a concentration of 0.3 weight/volume percent in pentafluorophenol at 60° C.
Claim 8
Dependent Claim
31 words
A polymer blend according to claim 1 wherein said naphthalene moiety of said first wholly aromatic polyester is selected from the group consisting of 6-oxy-2-naphthoyl moiety, 2,6-dioxynaphthalene moiety, and 2,6-dicarboxynaphthalene moiety.
Claim 9
Dependent Claim
32 words
A polymer blend according to claim 1 wherein said first wholly aromatic polyester apart from said blend is capable of forming an anisotropic melt phase at a temperature below approximately 400° C.
Claim 10
Dependent Claim
66 words
A polymer blend according to claim 1 wherein said first wholly aromatic polyester comprises a melt processable wholly aromatic polyester which is capable of forming an anisotropic melt phase apart from said blend at a temperature below approximately 325° C. and consists essentially of the recurring moieties I, II, and III wherein: ##STR10## wherein said polyester comprises approximately 30 to 70 mole percent of moiety I.
Claim 11
Dependent Claim
75 words
A polymer blend according to claim 1 wherein said first wholly aromatic polyester comprises a melt processable wholly aromatic polyester which is capable of forming an anisotropic melt phase apart from said blend at a temperature below approximately 350° C. and consists essentially of the recurring moieties I and II wherein: ##STR11## wherein said polyester comprises approximately 10 to 90 mole percent of moiety I, and approximately 10 to 90 mole percent of moiety II.
Claim 12
Dependent Claim
151 words
A polymer blend according to claim 1 wherein said first wholly aromatic polyester comprises a melt processable wholly aromatic polyester which is capable of forming an anisotropic melt phase apart from said blend at a temperature below approximately 320° C. and consists essentially of the recurring moieties I, II, III, and IV wherein: ##STR12## III is a dioxy aryl moiety of the formula --O--Ar--O-- where Ar is a divalent radical comprising at least one aromatic ring, and IV is a dicarboxy aryl moiety of the formula ##STR13## where Ar' is a divalent radical comprising at least one aromatic ring, wherein said polyester comprises approximately 20 to 40 mole percent of moiety I, in excess of 10 up to about 50 mole percent of moiety II, in excess of 5 up to about 30 mole percent of moiety III, and in excess of 5 up to 30 mole percent of moiety IV.
Claim 13
Dependent Claim
130 words
A polymer blend according to claim 1 wherein said first wholly aromatic polyester comprises a melt processable wholly aromatic polyester which is capable of forming an anisotropic melt phase apart from said blend at a temperature below approximately 400° C. and consists essentially of the recurring moieties I, II, and III wherein: ##STR14## II is a dioxy aryl moiety of the formula --O--Ar--O-- where Ar is a divalent radical comprising at least one aromatic ring, and III is a dicarboxyl aryl moiety of the formula ##STR15## where Ar' is a divalent radical comprising at least one aromatic ring, wherein said polyester comprises approximately 10 to 90 mole percent of moiety I, approximately 5 to 45 mole percent of moiety II, and approximately 5 to 45 mole percent of moiety III.
Claim 14
Dependent Claim
36 words
A molding compound comprising the polymer blend of claim 1 which incorporates approximately 1 to approximately 50 percent by weight, based upon the total weight of said molding compound, of a solid filler and/or reinforcing agent.
Claim 15
Dependent Claim
33 words
A molding compound according to claim 13 which incorporates approximately 10 to approximately 30 percent by weight, based upon the total weight of said molding compound, of a solid filler and/or reinforcing agent.
Claim 16
Dependent Claim
9 words
A molded article comprising the blend of claim 1.
Claim 17
Dependent Claim
14 words
A fiber which has been melt spun from the polymer blend of claim 1.
Claim 18
Dependent Claim
14 words
A film which has been melt extruded from the polymer blend of claim 1.
Claim 19
Dependent Claim
36 words
A shaped article comprising the polymer blend according to claim 1 which has been subjected to heat treatment in a non-oxidizing atmosphere for approximately 10° C. to 30° C. below the melting point of said blend.
Claim 20
Dependent Claim
44 words
A shaped article comprising the polymer blend according to claim 1 which has been subjected to heat treatment in a nitrogen atmosphere for approximately 48 to 72 hours at a temperature approximately 10° C. to 30° C. below the melting point of said blend.
Claim 21
Dependent Claim
24 words
A polymer blend according to claim 1 which is capable of being satisfactorily molded while employing a mold temperature less than approximately 100° C.
Claim 22
Dependent Claim
202 words
A polymer blend which is capable of exhibiting an anisotropic melt phase and which is capable of forming shaped articles which exhibit satisfactory mechanical properties comprising: (a) approximately 5 to approximately 95 percent by weight, based upon the total weight of components (a) and (b), of a first melt processable wholly aromatic polyester which is capable of forming an anisotropic melt phase at a temperature below approximately 325° C. apart from said blend and consists essentially of the recurring moieties I, II, and III wherein: ##STR16## wherein said polyester comprises approximately 30 to 70 mole percent of moiety I, and (b) approximately 5 to approximately 95 percent by weight, based upon the total weight of components (a) and (b), of a second melt processable polyester which is capable of forming an anisotropic melt phase at a temperature no higher than approximately 320° C. apart from said blend and consists essentially of the recurring moieties I, II, III, and IV wherein: ##STR17## wherein said polyester comprises approximately 20 to 60 mole percent of moiety I, approximately 5 to 18 mole percent of moiety II, approximately 5 to 35 mole percent of moiety III, and approximately 20 to 40 mole percent of moiety IV.
Claim 23
Dependent Claim
202 words
A polymer blend which is capable of exhibiting an anisotropic melt phase and which is capable of forming shaped articles which exhibit satisfactory mechanical properties comprising: (a) approximately 5 to approximately 95 percent by weight, based upon the total weight of components (a) and (b), of a first melt processable wholly aromatic polyester which is capable of forming an anisotropic melt phase at a temperature below approximately 325° C. apart from said blend and consists essentially of the recurring moieties I, II, and III wherein: ##STR16## wherein said polyester comprises approximately 30 to 70 mole percent of moiety I, and (b) approximately 5 to approximately 95 percent by weight, based upon the total weight of components (a) and (b), of a second melt processable polyester which is capable of forming an anisotropic melt phase at a temperature no higher than approximately 320° C. apart from said blend and consists essentially of the recurring moieties I, II, III, and IV wherein: ##STR17## wherein said polyester comprises approximately 20 to 60 mole percent of moiety I, approximately 5 to 18 mole percent of moiety II, approximately 5 to 35 mole percent of moiety III, and approximately 20 to 40 mole percent of moiety IV.
Claim 24
Dependent Claim
44 words
A polymer blend according to claim 21 wherein said first melt processable wholly aromatic polyester comprises approximately 40 to 60 mole percent of moiety I, approximately 20 to 30 mole percent of moiety II, and approximately 20 to 30 mole percent of moiety III.
Claim 25
Dependent Claim
76 words
A polymer blend according to claim 21 wherein said second melt processable wholly aromatic polyester consists essentially of approximately 35 to 45 mole percent of moiety I, approximately 10 to 15 mole percent of moiety II, approximately 15 to 25 mole percent of moiety III, and approximately 25 to 35 mole percent of moiety IV, with the proviso that the total molar concentration of moieties II and III is substantially identical to that of moiety IV.
Claim 26
Dependent Claim
27 words
A polymer blend according to claim 21 which is capable of undergoing melt processing at a temperature within the range of approximately 280° C. to 300° C.
Claim 27
Dependent Claim
37 words
A polymer blend according to claim 21 wherein said first wholly aromatic polyester exhibits an inherent viscosity of at least 2.0 dl./g. when dissolved in a concentration of 0.1 percent by weight in pentafluorophenol at 60° C.
Claim 28
Dependent Claim
38 words
A polymer blend according to claim 21 wherein said first wholly aromatic polyester exhibits an inherent viscosity of approximately 2.0 to 8.0 dl./g. when dissolved in a concentration of 0.1 percent by weight in pentafluorophenol at 60° C.
Claim 29
Dependent Claim
36 words
A polymer blend according to claim 21 wherein said second wholly aromatic polyester exhibits an inherent viscosity of at least 2.0 dl./g. when dissolved in a concentration of 0.3 weight/volume percent in pentafluorophenol at 60° C.
Claim 30
Dependent Claim
42 words
A molding compound comprising the blend of claim 21 which incorporates approximately 1 to approximately 50 percent by weight, based upon the total weight of said molding compound, selected from the group consisting of a solid filler, reinforcing agent and mixtures thereof.
Claim 31
Dependent Claim
40 words
A molding compound according to claim 28 which incorporates approximately 10 to approximately 30 percent by weight, based upon the total weight of said molding compound, selected from the group consisting of a solid filler, reinforcing agent and mixtures thereof.
Claim 32
Dependent Claim
9 words
A molded article comprising the blend of claim 21.
Claim 33
Dependent Claim
14 words
A fiber which has been melt spun from the polymer blend of claim 21.
Claim 34
Dependent Claim
14 words
A film which has been melt extruded from the polymer blend of claim 21.
Claim 35
Dependent Claim
44 words
A shaped article comprising the polymer blend according to claim 21 which has been subjected to heat treatment in a non-oxidizing atmosphere for approximately 0.5 to 200 hours at a temperature approximately 10° C. to 30° C. below the melting point of said blend.
Claim 36
Dependent Claim
44 words
A shaped article comprising the polymer blend according to claim 21 which has been subjected to heat treatment in a nitrogen atmosphere for approximately 48 to 72 hours at a temperature approximately 10° C. to 30° C. below the melting point of said blend.
Claim 37
Dependent Claim
57 words
A polymer blend according to claim 21 comprising approximately 5 to approximately 70 percent by weight, based upon the total weight of components (a) and (b), of said first wholly aromatic polyester and approximately 30 to approximately 95 percent by weight, based upon the total weight of components (a) and (b), of said second wholly aromatic polyester.
Claim 38
Dependent Claim
9 words
A molded article comprising the blend of claim 35.
Claim 39
Dependent Claim
20 words
A molded article according to claim 36 which exhibits tensile and flexural strengths of no less than approximately 21,000 p.s.i.
Claim 40
Dependent Claim
14 words
A fiber which has been melt spun from the polymer blend of claim 35.
Claim 41
Dependent Claim
14 words
A film which has been melt extruded from the polymer blend of claim 35.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-11 | 1984-11-10 | 1985-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-11 | 1988-11-10 | 1989-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-11 | 1992-11-10 | 1993-05-12 | $7700.00 | Window Closed / Lapsed |