US4532290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized polycarbonate-polyester compositions
Assignee: General Electric Co
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Filing: 1984-05-02
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Granted: 1985-07-30
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Expires: 2004-05-02
Abstract
Abstract Compositions comprising predominately a polycarbonate resin, e.g., poly(bisphenol A carbonate), and a polyester resin, e.g., poly(1,4-butylene terephthalate), alone, or in combination with one or more second resins, are melt stabilized with monosodium phosphate and/or monopotassium phosphate.
Inventors
- 👤 Donald B. G. Jaquiss
- 👤 Russell J. McCready
- 👤 John A. Tyrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:05
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/32
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
55 words
A thermoplastic composition comprising: (a) 100 parts by weight of an aromatic polycarbonate resin; (b) 5 to 95 parts by weight of at least one polyester resin prepared by reacting terephthalic acid or a reactive derivative thereof and an alkane diol; and (c) a melt-stabilizing amount of monosodium phosphate, monopotassium phosphate or a mixture thereof.
Claim 2
Dependent Claim
55 words
A thermoplastic composition comprising: (a) 100 parts by weight of an aromatic polycarbonate resin; (b) 5 to 95 parts by weight of at least one polyester resin prepared by reacting terephthalic acid or a reactive derivative thereof and an alkane diol; and (c) a melt-stabilizing amount of monosodium phosphate, monopotassium phosphate or a mixture thereof.
Claim 3
Dependent Claim
20 words
A composition as defined in claim 1 wherein said polyester resin component (b) comprises 10 to 70 parts by weight.
Claim 4
Dependent Claim
18 words
A composition as defined in claim 1 wherein said polyester has been polymerized with a titanium compound catalyst.
Claim 5
Dependent Claim
27 words
A composition as defined in claim 1 containing from about 0.01 to about 7.5 parts of said phosphate per 100 parts by weight of said polyester (b).
Claim 6
Dependent Claim
27 words
A composition as defined in claim 1 containing from about 0.1 to about 4.0 parts of said phosphate per 100 parts by weight of said polyester (b).
Claim 7
Dependent Claim
13 words
A composition as defined in claim 1 wherein component (c) is monosodium phosphate.
Claim 8
Dependent Claim
24 words
A composition as defined in claim 1 wherein said aromatic polycarbonate resin (a) is derived from a diphenol and phosgene or a phosgene precursor.
Claim 9
Dependent Claim
17 words
A composition as defined in claim 7 wherein said aromatic polycarbonate resin (a) is poly(bisphenol A carbonate).
Claim 10
Dependent Claim
15 words
A composition as defined in claim 1 wherein said polyester resin (b) comprises poly(1,4-butylene terephthalate).
Claim 11
Dependent Claim
15 words
A composition as defined in claim 1 wherein said polyester resin (b) comprises poly(ethylene terephthalate).
Claim 12
Dependent Claim
21 words
A composition as defined in claim 1 wherein said polyester resin (b) comprises an admixture of poly(1,4-butylene terephthalate) and poly(ethylene terephthalate).
Claim 13
Dependent Claim
24 words
A composition as defined in claim 1 wherein the polycarbonate resin (a) comprises poly(bisphenol A carbonate) and the polyester resin (b) comprises poly(1,4-butylene terephthalate).
Claim 14
Dependent Claim
15 words
A composition as defined in claim 1 which also includes (d) an impact modifier resin.
Claim 15
Dependent Claim
16 words
A composition as defined in claim 13 wherein the impact modifier resin comprises a polyacrylate resin.
Claim 16
Dependent Claim
23 words
A composition as defined in claim 1 which also includes a flame-retardant amount of a flame retardant additive or combination of such additives.
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) | 1988-07-29 | 1989-01-28 | 1989-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-29 | 1993-01-28 | 1993-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-29 | 1997-01-28 | 1997-07-30 | $7700.00 | Window Closed / Lapsed |