EP0044175A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Blend of polycarbonate and wholly aromatic polyester
Assignee: Celanese Corp
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Filing: 1981-07-02
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Granted: —
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Expires: 2001-07-02
Abstract
Abstract A polymer blend which is capable of exhibiting an anisotropic melt phase and the ability to form shaped articles having improved mechanical properties is provided. The polymer blend comprises approximately 5 to approximately 75 percent by weight, based upon the total weight of the blend, of a polycarbonate and approximately 25 to approximately 95 percent by weight, based upon the total weight of the blend, of a melt processable wholly aromatic polyester which is capable of forming an anisotropic melt phase apart from the blend.
Inventors
- 👤 Michael F. Froix
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 23:45
CPC Classifications
C; C08; C08L; C08L67/00; C08L69/00
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
79 words
A polymer blend which is capable of exhibiting an anisotropic melt phase and the ability to form shaped articles having improved mechanical properties comprising: (a) 5 to 75 percent by weight, based upon the total weight of components (a) and (b), of a polycarbonate, and (b) 25 to 95 percent by weight, based upon the total weight of components (a) and (b), of a melt processable wholly aromatic polyester which is itself capable of forming an anisotropic melt phase.
Claim 2
Dependent Claim
79 words
A polymer blend which is capable of exhibiting an anisotropic melt phase and the ability to form shaped articles having improved mechanical properties comprising: (a) 5 to 75 percent by weight, based upon the total weight of components (a) and (b), of a polycarbonate, and (b) 25 to 95 percent by weight, based upon the total weight of components (a) and (b), of a melt processable wholly aromatic polyester which is itself capable of forming an anisotropic melt phase.
Claim 3
Dependent Claim
22 words
A polymer blend according to claim 1 which is capable of undergoing melt processing at a temperature within-the range 260°C. to 350°C.
Claim 4
Dependent Claim
23 words
A polymer blend according to claim 2 which is capable of undergoing melt processing at a temperature within the range 280°C. to 300°C.
Claim 5
Dependent Claim
21 words
A polymer blend according to any of claims 1 - 3 wherein the said polycarbonate has repeating units of the formula:
Claim 6
Dependent Claim
30 words
A polymer blend according to any of claims 1 - 4 wherein the said polyester (component (6))is itself capable of forming an anisotropic melt phase at a temperature below 350°C.
Claim 7
Dependent Claim
40 words
A polymer blend according to any of claims 1 - 5 wherein the said polyester (component (b)) has an inherent viscosity of at least 2.0 dl./g. when dissolved at a concentration of 0.1 percent by weight in pentafluorophenol at 60°C.
Claim 8
Dependent Claim
117 words
A polymer blend according to any of claims 1 - 6 wherein the said polyester (component (b.)) is itself capable of forming an anisotropic melt phase at a temperature no higher than 320°C and consists essentially of the recurring moieties I, II, III and IV wherein: I is II is III is and IV is (R being methyl, chloro, bromo, or a combination of any thereof, and being substituted for a hydrogen atom present upon the aromatic ring) and wherein the said polyester comprises 20 to 60 mole percent of moiety I, 5 to 18 mole percent of moiety II, 5 to 35 mole percent of moiety III and 20 to 40 mole percent of moiety IV.
Claim 9
Dependent Claim
11 words
A polymer blend according to claim 7, wherein R is methyl.
Claim 10
Dependent Claim
69 words
A polymer blend according to claim 7 or 8 wherein the said polyestercohsists essentially of 35 to 45 mole percent of moiety I, 10 to 15 mole percent of moiety II, 15 to 25 mole percent of moiety III and 25 to 35 mole percent of moiety IV, with the proviso that the total molar concentration of moieties II and III is substantially equal to that of moiety IV.
Claim 11
Dependent Claim
37 words
A polymer blend according to any of claims 7 - 9 wherein the said polyester has 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 12
Dependent Claim
32 words
A polymer blend according to claim 10 wherein the said polyester has an inherent viscosity of 2.0 to 8.0 when dissolved in a concentration of 0.3 weight/volume percent in pentafluorophenol at 60°C.
Claim 13
Dependent Claim
62 words
A polymer blend according to any of claims 1 - 6 wherein the said polyester (component (b)) is itself capable of forming an anisotropic melt phase at a temperature below 325°C. and consists essentially of the recurring moieties I, V.and III wherein: I is V. is and III is and-wherein the said polyester comprises 30 to 70 mole percent of moiety I.
Claim 14
Dependent Claim
52 words
A polymer blend according to any of claims 1 - 12 comprising 5 to 40 percent by weight, based upon the total weight of components (a) and (b), of the polycarbonate and 60 to 95 percent by weight, based upon the total weight of components (a) and (b), of the said polyester.
Claim 15
Dependent Claim
27 words
A polymer blend according to any of claims 1 - 13 .which is capable of being satisfactorily moulded while employing a mould temperature less than approximately 100°C.
Claim 16
Dependent Claim
38 words
A moulding compound comprising a polymer blend according to any of claims 1 - 13 and 1 to 50 percent by weight, based upon the total weight of the moulding compound, of a solid filler and/or reinforcing agent.
Claim 17
Dependent Claim
31 words
A moulding compound according to claim 14 which incorporates 10 to 30 percent by weight, based upon the total weight of the moulding compound, of the solid filler and/or reinforcing agent.
Claim 18
Dependent Claim
23 words
A moulded article comprising the polymer blend of any of claims 1 - 14 or the moulding compound of claim 15 or 16.
Claim 19
Dependent Claim
26 words
A moulded article according to claim 17 which exhibits a tensile strength of at least 25,000 p.s.i. and a flexural strength of at least 19,000 p.s.i.
Claim 20
Dependent Claim
18 words
A fibre which has been melt spun from the polymer blend of any of claims 1 - 13.
Claim 21
Dependent Claim
18 words
A film which has been melt extruded from the polymer blend of any of claims 1 - 13..
References Cited (Backward Citations)
GB1538632A
Cited
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