US4469850A
Expired / Lapsed
US
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Compositions
Assignee: General Electric Co
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Filing: 1982-11-05
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Granted: 1984-09-04
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Expires: 2002-11-05
Abstract
Abstract Good impact resistance is obtained with blends of polycarbonate and aromatic copolyester carbonate with preferred composition exhibiting a substantial ductile failure mode at break.
Inventors
- 👤 Edward L. Belfoure
- 👤 Kenneth F. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:56
CPC Classifications
C; C08; C08L; C08L69/00; C08L69/005
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
128 words
A composition comprising an intimate admixture of a. a halogen free, unbranched aromatic polycarbonate derived from a dihydric phenol and a carbonate precursor, having an intrinsic viscosity of at least about 0.60 dl/g in methylene chloride at 25° C., and b. a halogen free unbranched aromatic copolyester carbonate derived from a dihydric phenol, a carbonate precursor, and an aromatic dicarboxylic acid or reactive derivative thereof selected from the group consisting of terephthalic acid or a mixture of isophthalic and terephthalic acid; said aromatic polycarbonate and aromatic copolyester carbonate present in such quantities that the 1/4 inch notched Izod impact strength of the composition is higher than that of component a alone or component b alone and the 1/4 inch notched Izod impact test failure mode is substantially ductile.
Claim 2
Dependent Claim
128 words
A composition comprising an intimate admixture of a. a halogen free, unbranched aromatic polycarbonate derived from a dihydric phenol and a carbonate precursor, having an intrinsic viscosity of at least about 0.60 dl/g in methylene chloride at 25° C., and b. a halogen free unbranched aromatic copolyester carbonate derived from a dihydric phenol, a carbonate precursor, and an aromatic dicarboxylic acid or reactive derivative thereof selected from the group consisting of terephthalic acid or a mixture of isophthalic and terephthalic acid; said aromatic polycarbonate and aromatic copolyester carbonate present in such quantities that the 1/4 inch notched Izod impact strength of the composition is higher than that of component a alone or component b alone and the 1/4 inch notched Izod impact test failure mode is substantially ductile.
Claim 3
Dependent Claim
44 words
The composition in accordance with claim 1 wherein the aromatic polycarbonate is derived from a dihydric phenol of the formula ##STR2## wherein R 1 and R 2 are the same or different and are hydrogen or alkyl of one to six carbon atoms, inclusive.
Claim 4
Dependent Claim
14 words
The composition in accordance with claim 2 wherein the dihydric phenol is bisphenol A.
Claim 5
Dependent Claim
25 words
The composition in accordance with claim 2 wherein the aromatic copolyester carbonate is derived from a mixture of isophthalic acid chloride and terephthalic acid chloride.
Claim 6
Dependent Claim
25 words
The composition in accordance with claim 3 wherein the aromatic copolyester carbonate is derived from a mixture of isophthalic acid chloride and terephthalic acid chloride.
Claim 7
Dependent Claim
21 words
The composition in accordance with claim 2 wherein in the aromatic copolyester carbonate the dihydric phenol is derived from bisphenol A.
Claim 8
Dependent Claim
21 words
The composition in accordance with claim 5 wherein in the aromatic copolyester carbonate the dihydric phenol is derived from bisphenol A.
Claim 9
Dependent Claim
44 words
The composition in accordance with claim 2 wherein the weight percent of ester content is from about 18 to about 36 weight percent, the weight percent based on the total weight percent of the aromatic polycarbonate and aromatic copolyester carbonte present in the composition.
Claim 10
Dependent Claim
10 words
A shaped article molded from the composition of claim 1.
Claim 11
Dependent Claim
10 words
A shaped article molded from the composition of claim 3.
References Cited (Backward Citations)
US4297455A
Cited
US4226961A
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EP0004020A1
Cited
JPS55131048A
Cited
JPS55133445A
Cited
US4238596A
Cited
US4238597A
Cited
US4369303A
Cited
US4360648A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |