US4579903A
Expired / Lapsed
US
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Copolyester-carbonate composition
Assignee: General Electric Co
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Filing: 1984-12-19
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Granted: 1986-04-01
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Expires: 2004-12-19
Abstract
Abstract Copolyester-carbonate composition exhibiting improved resistance to organic solvents comprising, in admixture: (i) at least one aromatic copolyester-carbonate resin; (ii) at least one aromatic polycarbonate resin; (iii) at least one selectively hydrogenated block copolymer of a vinyl aromatic compound and an olefinic elastomer; and (iv) at least one polymer selected from an olefin acrylate copolymer, an olefin diene terpolymer, or mixtures thereof. The instant composition also exhibits improved impact properties and relatively high heat resistance.
Inventors
- 👤 Ping Y. Liu
- 👤 Edward L. Belfoure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:25
CPC Classifications
C; C08; C08L; C08L69/00; C08L69/005; Y; Y10; Y10S; Y10S525/00; Y10S525/901
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
171 words
Copolyester-carbonate composition exhibiting improved resistance to organic solvents and good thermal properties comprising, in admixture: (i) at least one high molecular weight thermoplastic aromatic copolyester-carbonate resin containing from about 25 to about 90 mole percent ester bonds; (ii) at least one high molecular weight thermoplastic aromatic polycarbonate resin; (iii) at least one selectively hydrogenated linear, sequential or radial teleblock copolymer of a vinyl aromatic compound (A) and (A') independently selected from styrene, alpha-methylstyrene, p-methylstyrene, vinyl toluene, vinyl xylene and vinyl naphthylene and an olefinic elastomer (B) of the type A-B-A', A-(B-A-B) n -A, A(BA) n B, (A) 4 B, B(A) 4 or B(AB) n B) 4 wherein n is an integer having a value of from 1 to 10 inclusive; and (iv) at least one polymer selected from an olefin acrylate copolymer, an ethylene propylene diene terpolymer, or mixtures thereof; components (ii)-(iv) being present in an amount at least effective to improve the resistance to organic solvents of said copolyester-carbonate resin but insufficient to substantially deleteriously affect the thermal properties thereof.
Claim 2
Dependent Claim
171 words
Copolyester-carbonate composition exhibiting improved resistance to organic solvents and good thermal properties comprising, in admixture: (i) at least one high molecular weight thermoplastic aromatic copolyester-carbonate resin containing from about 25 to about 90 mole percent ester bonds; (ii) at least one high molecular weight thermoplastic aromatic polycarbonate resin; (iii) at least one selectively hydrogenated linear, sequential or radial teleblock copolymer of a vinyl aromatic compound (A) and (A') independently selected from styrene, alpha-methylstyrene, p-methylstyrene, vinyl toluene, vinyl xylene and vinyl naphthylene and an olefinic elastomer (B) of the type A-B-A', A-(B-A-B) n -A, A(BA) n B, (A) 4 B, B(A) 4 or B(AB) n B) 4 wherein n is an integer having a value of from 1 to 10 inclusive; and (iv) at least one polymer selected from an olefin acrylate copolymer, an ethylene propylene diene terpolymer, or mixtures thereof; components (ii)-(iv) being present in an amount at least effective to improve the resistance to organic solvents of said copolyester-carbonate resin but insufficient to substantially deleteriously affect the thermal properties thereof.
Claim 3
Dependent Claim
38 words
The composition of claim 1 which contains from about 10 to about 75 weight percent of (ii), from about 2 to about 25 weight percent of (iii), and from about 1 to about 20 weight percent of (iv).
Claim 4
Dependent Claim
19 words
The composition of claim 2 which contains from about 20 to about 85 weight percent of said copolyester-carbonate resin.
Claim 5
Dependent Claim
41 words
The composition of claim 3 which contains from about 15 to about 70 weight percent of component (ii), from about 4 to about 20 weight percent of component (iii), and from about 2 to about 15 weight percent of component (iv).
Claim 6
Dependent Claim
19 words
The composition of claim 4 which contains from about 25 to about 80 weight percent of said copolyester-carbonate resin.
Claim 7
Dependent Claim
41 words
The composition of claim 5 which contains from about 20 to about 60 weight percent of component (ii), from about 5 to about 15 weight percent of component (iii), and from about 3 to about 10 weight percent of component (iv).
Claim 8
Dependent Claim
19 words
The composition of claim 6 which contains from about 30 to about 70 weight percent of said copolyester-carbonate resin.
Claim 9
Dependent Claim
12 words
The composition of claim 1 wherein (iv) is an olefin acrylate copolymer.
Claim 10
Dependent Claim
42 words
The composition of claim 8 wherein said olefin acrylate copolymer is a copolymer of an olefin and at least one of a C 1 -C 6 alkyl acrylate, a C 1 -C 6 alkyl methacrylate, acrylic acid, methacrylic acid, or mixtures thereof.
Claim 11
Dependent Claim
24 words
The composition of claim 9 wherein said olefin acrylate copolymer is a copolymer of an olefin and a C 1 -C 6 alkyl acrylate.
Claim 12
Dependent Claim
12 words
The composition of claim 10 wherein said alkyl acrylate is ethyl acrylate.
Claim 13
Dependent Claim
10 words
The composition of claim 11 wherein said olefin is ethylene.
Claim 14
Dependent Claim
13 words
The composition of claim 12 wherein said olefin acrylate is ethylene ethyl acrylate.
Claim 15
Dependent Claim
13 words
The composition of claim 1 wherein (iv) is an ethylene propylene diene terpolymer.
Claim 16
Dependent Claim
16 words
The composition of claim 14 wherein said ethylene propylene diene terpolymer is ethylene propylene norbornene terpolymer.
Claim 17
Dependent Claim
17 words
The composition of claim 15 wherein said ethylene propylene norbornene terpolymer is ethylene propylene ethylidene norbornene terpolymer.
Claim 18
Dependent Claim
22 words
The composition of claim 1 wherein in said selectively hydrogenated block copolymer (iii) (B) is selected from butadiene, isoprene, 1,3-pentadiene, and 2,3-dimethyl-butadiene.
Claim 19
Dependent Claim
29 words
The composition of claim 17 wherein in said selectively hydrogenated block copolymer (iii) (A) is a styrene block, (B) is a diolefin block, and (A') is a styrene block.
Claim 20
Dependent Claim
48 words
The composition of claim 18 wherein in said selectively hydrogenated block copolymer (iii) terminal blocks (A) and (A') each have a weight average molecular weight of about 2,000 to about 60,000, and center block (B) has a weight average molecular weight of from about 20,000 to about 450,000.
Claim 21
Dependent Claim
22 words
The composition of claim 1 wherein said polycarbonate resin (ii) is derived from at least one dihydric phenol and a carbonate precursor.
Claim 22
Dependent Claim
11 words
The composition of claim 20 wherein said carbonate precursor is phosgene.
Claim 23
Dependent Claim
11 words
The composition of claim 21 wherein said dihydric phenol is bisphenol-A.
Claim 24
Dependent Claim
27 words
The composition of claim 1 wherein said copolyester-carbonate resin (i) is derived from at least one dihydric phenol, a carbonate precursor, and at least one ester precursor.
Claim 25
Dependent Claim
22 words
The composition of claim 23 wherein said copolyester-carbonate resin has an ester content of from about 70 to about 80 mole percent.
Claim 26
Dependent Claim
11 words
The composition of claim 24 wherein said dihydric phenol is bisphenol-A.
Claim 27
Dependent Claim
19 words
The composition of claim 25 wherein said ester precursor is selected from isophthaloyl dichloride, terephthaloyl dichloride, and mixtures thereof.
Claim 28
Dependent Claim
41 words
The composition of claim 26 wherein said ester content is comprised of from about 1 to about 10 mole percent of the residue of terephthaloyl dichloride and from about 90 to about 99 mole percent of the residue of isophthaloyl dichloride.
Claim 29
Dependent Claim
11 words
The composition of claim 27 wherein said carbonate precursor is phosgene.
Claim 30
Dependent Claim
17 words
The composition of claim 1 which further contains a flame retardant amount of a flame retardant compound.
Claim 31
Dependent Claim
24 words
The composition of claim 29 wherein said flame retardant compound is selected from the alkali and alkaline earth metal salts of organic sulfonic acids.
References Cited (Backward Citations)
US4481331A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |