US4226961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent compositions of bisphenol-A-polycarbonate, polyalkylene terephthalate and an aromatic polyester carbonate
Assignee: General Electric Co
•
Filing: 1979-08-10
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Granted: 1980-10-07
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Expires: 1999-08-10
Abstract
Abstract Novel thermoplastic molding compositions are disclosed which comprise (a) a polyalkylene terephthalate; (b) a bisphenol-A polycarbonate; and (c) an aromatic polyester carbonate.
Inventors
- 👤 Gary S. Motz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:26
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08L69/00; C08G; C08G2261/00; C08G2261/30; C08G2261/31; C08G2261/312
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
45 words
A thermoplastic molding composition, which after molding is transparent, said composition comprising (a) a polyalkylene terephthalate; (b) a bisphenol-A polycarbonate; and (c) an aromatic polyester carbonate, wherein the total amount of component (a) exceeds about 10 to 12 percent by weight of the total composition.
Claim 2
Dependent Claim
45 words
A thermoplastic molding composition, which after molding is transparent, said composition comprising (a) a polyalkylene terephthalate; (b) a bisphenol-A polycarbonate; and (c) an aromatic polyester carbonate, wherein the total amount of component (a) exceeds about 10 to 12 percent by weight of the total composition.
Claim 3
Dependent Claim
14 words
The thermoplastic molding composition of claim 1 wherein the polyalkylene terephthalate is polyethylene terephthalate.
Claim 4
Dependent Claim
14 words
The thermoplastic molding composition of claim 1 wherein the polyalkylene terephthalate is poly(1,4-butylene terephthalate).
Claim 5
Dependent Claim
21 words
The thermoplastic molding composition of claim 1 wherein the polyalkylene terephthalate component is a mixture of polyethylene terephthalate and poly(1,4-butylene terephthalate).
Claim 6
Dependent Claim
32 words
The thermoplastic molding composition of claim 1 wherein the polyester carbonate is a terpolymer resulting from the condensation of phosgene, terephthaloyl chloride, isophthaloyl chloride with bisphenol-A and a small amount of p-tertbutylphenol.
Claim 7
Dependent Claim
20 words
The thermoplastic molding composition of claim 1 wherein the bisphenol-A polycarbonate has from 100-400 recurring units of the formula: ##STR2##
Claim 8
Dependent Claim
20 words
A thermoplastic molding composition as defined in claim 1 which includes a flame retardant amount of a flame retardant agent.
Claim 9
Dependent Claim
49 words
A thermoplastic molding composition which after molding is transparent, which comprises (a) from 90 to 15 percent by weight of a bisphenol-A polycarbonate; (b) from 10 to 85 percent by weight of a polyalkylene terephthalate; and (c) from 5 to 50 percent by weight of an aromatic polyester carbonate.
Claim 10
Dependent Claim
49 words
A thermoplastic molding composition which after molding is transparent, which comprises (a) from 90 to 15 percent by weight of a bisphenol-A polycarbonate; (b) from 10 to 85 percent by weight of a polyalkylene terephthalate; and (c) from 5 to 50 percent by weight of an aromatic polyester carbonate.
Claim 11
Independent Claim
64 words
A method for producing a transparent molded article which comprises preparing (a) a polyalkylene terephthalate in admixture with (b) a bisphenol-A polycarbonate, wherein the total amount of the polyester component (a) exceeds about 10 to 12 percent by weight of the total composition, adding to said mixture an amount of (c) an aromatic polyester carbonate and subjecting the total composition to a molding operation.
Claim 12
Independent Claim
64 words
A method for producing a transparent molded article which comprises preparing (a) a polyalkylene terephthalate in admixture with (b) a bisphenol-A polycarbonate, wherein the total amount of the polyester component (a) exceeds about 10 to 12 percent by weight of the total composition, adding to said mixture an amount of (c) an aromatic polyester carbonate and subjecting the total composition to a molding operation.
Claim 13
Dependent Claim
14 words
A method according to claim 9 wherein the polyalkylene terephthalate component is polyethylene terephthalate.
Claim 14
Dependent Claim
14 words
A method according to claim 9 wherein the polyalkylene terephthalate component is poly(1,4-butylene terephthalate).
Claim 15
Dependent Claim
20 words
A method according to claim 9 wherein the polyalkylene terephthalate component is a mixture of polyethylene terephthalate and poly(1,4-butylene terephthalate).
Claim 16
Dependent Claim
33 words
A method according to claim 9 wherein the aromatic polyester carbonate (c) is a terpolymer resulting from the condensation of phosgene, terephthaloyl chloride, isophthaloyl chloride with bisphenol-A and a small amount of p-tertbutylphenol.
Claim 17
Dependent Claim
19 words
A method according to claim 9 wherein the bisphenol-A polycarbonate has from 100-400 recurring units of the formula: ##STR3##
Claim 18
Dependent Claim
62 words
A method according to claim 9 which comprises preparing (a) 90 to 15 percent by weight of a bisphenol-A polycarbonate in admixture with (b) from 10 to 85 percent by weight of a polyalkylene terephthalate, adding to said mixture (c) from 5 to 50 percent by weight of an aromatic polyester carbonate and subjecting the total composition to a conventional molding operation.
Claim 19
Dependent Claim
28 words
A method according to claim 9 wherein the molded article comprising the components (a), (b) and (c), also includes a flame retardant amount of a flame retardant agent.
Claim 20
Dependent Claim
47 words
A thermoplastic molding composition, which after molding is transparent, said composition consisting essentially of (a) a polyalkylene terephthalate; (b) a bisphenol-A polycarbonate; and (c) an aromatic polyester carbonate, wherein the total amount of component (a) exceeds about 10 to 12 percent by weight of the total composition.
Claim 21
Dependent Claim
47 words
A thermoplastic molding composition, which after molding is transparent, said composition consisting essentially of (a) a polyalkylene terephthalate; (b) a bisphenol-A polycarbonate; and (c) an aromatic polyester carbonate, wherein the total amount of component (a) exceeds about 10 to 12 percent by weight of the total composition.
Claim 22
Dependent Claim
14 words
The thermoplastic molding composition of claim 17 wherein the polyalkylene terephthalate is polyethylene terephthalate.
Claim 23
Dependent Claim
14 words
The thermoplastic molding composition of claim 17 wherein the polyalkylene terephthalate is poly(1,4-butylene terephthalate).
Claim 24
Dependent Claim
21 words
The thermoplastic molding composition of claim 17 wherein the polyalkylene terephthalate component is a mixture of polyethylene terephthalate and poly(1,4-butylene terephthalate).
Claim 25
Dependent Claim
32 words
The thermoplastic molding composition of claim 17 wherein the polyester carbonate is a terpolymer resulting from the condensation of phosgene, terephthaloyl chloride, isophthaloyl chloride with bisphenol-A and a small amount of p-tertbutylphenol.
Claim 26
Dependent Claim
20 words
The thermoplastic molding composition of claim 18 wherein the bisphenol-A polycarbonate has from 100-400 recurring units of the formula: ##STR4##
Claim 27
Dependent Claim
20 words
A thermoplastic molding composition as defined in claim 17 which includes a flame retardant amount of a flame retardant agent.
Claim 28
Dependent Claim
50 words
A thermoplastic molding composition, which after molding is transparent, consisting essentially of (a) from 90 to 15 percent by weight of a bisphenol-A polycarbonate; (b) from 10 to 85 percent by weight of a polyalkylene terephthalate; and (c) from 5 to 50 percent by weight of an aromatic polyester carbonate.
Claim 29
Dependent Claim
50 words
A thermoplastic molding composition, which after molding is transparent, consisting essentially of (a) from 90 to 15 percent by weight of a bisphenol-A polycarbonate; (b) from 10 to 85 percent by weight of a polyalkylene terephthalate; and (c) from 5 to 50 percent by weight of an aromatic polyester carbonate.
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) | 1983-10-07 | 1984-04-07 | 1984-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-07 | 1988-04-07 | 1988-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-07 | 1992-04-07 | 1992-10-07 | $7700.00 | Window Closed / Lapsed |