US4564655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycarbonate compositions
Assignee: General Electric Co
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Filing: 1984-12-10
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Granted: 1986-01-14
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Expires: 2004-12-10
Abstract
Abstract Polycarbonate composition exhibiting improved resistance to organic solvents comprised of, in admixture: (i) at least one high molecular weight thermoplastic aromatic polycarbonate resin; (ii) at least one selectively hydrogenated linear, sequential or radial teleblock copolymer resin of a vinyl aromatic compound (A) n and (A') n and an olefinic elastomer (B), of the A--B--A', A--(B--A--B) n , A(BA) n B, (A) 4 B, B(A) 4 or B((AB) n B) 4 type wherein n is an integer of from 1 to 10; and (iii) at least one olefin-rubbery diene terpolymer; components (ii) and (iii) being present in amounts effective to improve the organic solvent resistance of said composition. The instant composition is useful in the production of extruded sheets and films, and injection or blow molded articles.
Inventors
- 👤 Ping Y. Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:04
CPC Classifications
C; C08; C08L; C08L69/00; C08L69/005; Y; Y10; Y10S; Y10S525/00; Y10S525/901; Y10S525/94
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
123 words
A polycarbonate composition exhibiting improved resistance to organic solvents comprising, in admixture: (i) at least one high molecular weight aromatic polycarbonate resin; (ii) 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-methyl-styrene, vinyl toluene, vinyl xylene, or 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 (iii) at least one ethylene propylene diene terpolymer; components (ii) and (iii) being present in amounts at least effective to improve the solvent resistance of said polycarbonate resin.
Claim 2
Dependent Claim
123 words
A polycarbonate composition exhibiting improved resistance to organic solvents comprising, in admixture: (i) at least one high molecular weight aromatic polycarbonate resin; (ii) 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-methyl-styrene, vinyl toluene, vinyl xylene, or 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 (iii) at least one ethylene propylene diene terpolymer; components (ii) and (iii) being present in amounts at least effective to improve the solvent resistance of said polycarbonate resin.
Claim 3
Dependent Claim
45 words
The composition of claim 1 which contains from about 2 to about 30 weight percent of component (ii) and from about 1 to about 20 weight percent of component (iii), based on the total amounts of components (i), (ii) and (iii) present in the composition.
Claim 4
Dependent Claim
30 words
The composition of claim 2 which contains from about 4 to about 20 weight percent of component (ii) and from about 2 to about 15 weight percent of component (iii).
Claim 5
Dependent Claim
30 words
The composition of claim 3 which contains from about 5 to about 15 weight percent of component (ii) and from about 3 to about 10 weight percent of component (iii).
Claim 6
Dependent Claim
21 words
The composition of claim 1 wherein in said selectively hydrogenated block copolymer (B) is selected from butadiene, isoprene, 1,3-pentadiene, and 2,3-dimethyl-butadiene.
Claim 7
Dependent Claim
29 words
The composition of claim 5 wherein in said selectively hydrogenated block copolymer resin (A) is a styrene block, (B) is a diolefin block, and (A') is a styrene block.
Claim 8
Dependent Claim
48 words
The composition of claim 6 wherein in said selectively hydrogenated block copolymer resin terminal blocks (A) and (A') each have weight average molecular weights of from 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 9
Dependent Claim
10 words
The composition of claim 1 wherein said diene is norbornene.
Claim 10
Dependent Claim
11 words
The composition of claim 8 wherein said norbornene is ethylidene norbornene.
Claim 11
Dependent Claim
17 words
The composition of claim 1 which further contains a flame retardant amount of a flame retardant compound.
Claim 12
Dependent Claim
24 words
The composition of claim 10 wherein said flame retardant compound is selected from the alkali and alkaline earth metal salts of organic sulfonic acids.
Claim 13
Dependent Claim
17 words
The composition of claim 1 wherein said polycarbonate resin is derived from bisphenol-A and a carbonate precursor.
Claim 14
Dependent Claim
11 words
The composition of claim 12 wherein said carbonate precursor is phosgene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1989-01-13 | 1989-07-15 | 1990-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-13 | 1993-07-15 | 1994-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-13 | 1997-07-15 | 1998-01-14 | $7700.00 | Window Closed / Lapsed |