US4537930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition of a polycarbonate resin and a selectively hydrogenated copolymer of a vinyl aromatic compound and an olefinic elastomer
Assignee: General Electric Co
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Filing: 1982-12-29
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Granted: 1985-08-27
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Expires: 2002-12-29
Abstract
Abstract There are provided compositions having superior impact resistance and improved solvent resistance comprising (a) an aromatic polycarbonate resin and (b) a minor amount of a selectively hydrogenated elastomeric block copolymer. The use of component (b) also provides remarkable improvements in the melt flow characteristics, in resistance to brittle failure, and in the resistance to environmental stress crazing and cracking of the polycarbonate resin component (a).
Inventors
- 👤 Jan Bussink
- 👤 Johannes W. J. DeMunck
- 👤 Petrus C. A. Marie van Abeelen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:09
CPC Classifications
C; C08; C08L; C08L69/00; C08L69/005
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
86 words
A thermoplastic composition having superior resistance to impact fracture in thick-walled molded articles and improved environmental solvent resistance comprising an intimate blend of: (a) an aromatic polycarbonate resin; and (b) up to 3.5 parts by weight, based on 100 parts by weight of components (a) and (b) combined, of a selectively hydrogenated linear copolymer of a vinyl aromatic compound (A) n and (A 1 ) n and an olefinic elastomer (B), of the type A-B-A 1 , wherein n is an integer from 1 to 10.
Claim 2
Dependent Claim
86 words
A thermoplastic composition having superior resistance to impact fracture in thick-walled molded articles and improved environmental solvent resistance comprising an intimate blend of: (a) an aromatic polycarbonate resin; and (b) up to 3.5 parts by weight, based on 100 parts by weight of components (a) and (b) combined, of a selectively hydrogenated linear copolymer of a vinyl aromatic compound (A) n and (A 1 ) n and an olefinic elastomer (B), of the type A-B-A 1 , wherein n is an integer from 1 to 10.
Claim 3
Dependent Claim
39 words
A composition as defined in claim 1, wherein component (a) comprises from 99.5 to 96.5 parts by weight and component (b) comprises from 0.5 to 3.5 parts by weight, based on the total weight of components (a) and (b).
Claim 4
Dependent Claim
41 words
A composition as defined in claim 1, wherein component (a) comprises from 99.5 to about 97 parts by weight and component (b) comprises from 0.5 to about 3 parts by weight, based on the total weight of components (a) and (b).
Claim 5
Dependent Claim
22 words
A composition as defined in claim 1, wherein component (a) is an aromatic polycarbonate of a dihydric phenol and a carbonate precursor.
Claim 6
Dependent Claim
16 words
A composition as defined in claim 4, wherein said aromatic polycarbonate is a polycarbonate of bisphenol-A.
Claim 7
Dependent Claim
47 words
A composition as defined in claim 1, wherein, in component (b), (A) and (A 1 ) are selected from the group consisting of styrene, α-methyl styrene, vinyl toluene, vinyl xylene, and vinyl naphthalene and (B) is selected from the group consisting of butadiene, isoprene, 1,3-pentadiene, and 2,3-dimethylbutadiene.
Claim 8
Dependent Claim
29 words
A composition as defined in claim 6, wherein, in component (b), (A) is a styrene block, (B) is an olefin block, and (A 1 ) is a styrene block.
Claim 9
Dependent Claim
39 words
A composition as defined in claim 7, wherein in component (b), terminal blocks (A) and (A 1 ) have molecular weight of 2,000 to 100,000, respectively, and center block (B) has a molecular weight of from 25,000 to 1,000,000.
Claim 10
Dependent Claim
16 words
A reinforced composition as defined in claim 1 including a reinforcing amount of a reinforcing filler.
Claim 11
Dependent Claim
14 words
A composition as defined in claim 9, wherein said reinforcing agent comprises glass fibers.
Claim 12
Dependent Claim
12 words
A composition as defined in claim 9 which contains a flame retardant.
Claim 13
Dependent Claim
12 words
A composition as defined in claim 1 which contains a flame retardant.
Claim 14
Dependent Claim
18 words
A composition as defined in claim 1 which also includes a minor, effective amount of a foaming agent.
Claim 15
Dependent Claim
18 words
A composition as defined in claim 9 which also includes a minor, effective amount of a foaming agent.
Claim 16
Dependent Claim
17 words
A composition as defined in claim 1 which also includes a small, effective amount of a pigment.
Claim 17
Dependent Claim
13 words
A composition as defined in claim 15, wherein said pigment is titanium dioxide.
Claim 18
Dependent Claim
27 words
A thermoplastic composition comprising an intimate blend of: (a) 97 parts by weight of poly-(2,2-diphenylpropane carbonate); and (b) 3 parts by weight of hydrogenated styrene-butadiene-styrene block copolymer.
Claim 19
Dependent Claim
27 words
A thermoplastic composition comprising an intimate blend of: (a) 97 parts by weight of poly-(2,2-diphenylpropane carbonate); and (b) 3 parts by weight of hydrogenated styrene-butadiene-styrene block copolymer.
Claim 20
Dependent Claim
31 words
A thermoplastic composition comprising an intimate blend of: (a) 95 parts by weight of poly-(2,2-diphenylpropane carbonate); (b) 3 parts by weight of hydrogenated styrene-butadiene-styrene block copolymer; and (c) titanium dioxide pigment.
Claim 21
Dependent Claim
31 words
A thermoplastic composition comprising an intimate blend of: (a) 95 parts by weight of poly-(2,2-diphenylpropane carbonate); (b) 3 parts by weight of hydrogenated styrene-butadiene-styrene block copolymer; and (c) titanium dioxide pigment.
Claim 22
Dependent Claim
87 words
A thermoplastic composition having superior resistance to impact fracture in thick-walled molded articles and improved environmental solvent resistance comprising an intimate blend of: (a) an aromatic polycarbonate resin; and (b) up to about 3.0 parts by weight, based on 100 parts by weight of components (a) and (b) combined, of a selectivity hydrogenated linear copolymer of a vinyl aromatic compound (A) n and (A 1 ) n and an olefinic elastomer (B), of the type A-B-A 1 , wherein n is an integer from 1 to 10.
Claim 23
Dependent Claim
87 words
A thermoplastic composition having superior resistance to impact fracture in thick-walled molded articles and improved environmental solvent resistance comprising an intimate blend of: (a) an aromatic polycarbonate resin; and (b) up to about 3.0 parts by weight, based on 100 parts by weight of components (a) and (b) combined, of a selectivity hydrogenated linear copolymer of a vinyl aromatic compound (A) n and (A 1 ) n and an olefinic elastomer (B), of the type A-B-A 1 , wherein n is an integer from 1 to 10.
Claim 24
Dependent Claim
41 words
A composition as defined in claim 19, wherein component (a) comprises from 99.5 to about 97 parts by weight and component (b) comprises from 0.5 to about 3 parts by weight, based on the total weight of components (a) and (b).
Claim 25
Dependent Claim
11 words
An article molded to shape from the composition of claim 1.
Claim 26
Dependent Claim
11 words
An article molded to shape from the composition of claim 9.
Claim 27
Dependent Claim
11 words
An article molded to shape from the composition of claim 12.
Claim 28
Dependent Claim
11 words
An article molded to shape from the composition of claim 13.
Claim 29
Dependent Claim
11 words
An article molded to shape from the composition of claim 15.
Claim 30
Dependent Claim
11 words
An article molded to shape from the composition of claim 19.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-26 | 1989-02-25 | 1989-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-26 | 1993-02-25 | 1993-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-26 | 1997-02-25 | 1997-08-27 | $7700.00 | Window Closed / Lapsed |