US4562222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycarbonate resin mixtures
Assignee: General Electric Co
•
Filing: 1984-12-19
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Granted: 1985-12-31
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Expires: 2004-12-19
Abstract
Abstract A resin mixture comprising: (a) an aromatic polycarbonate resin preferably having no more than about 20% of the structural units of the formula ##STR1## wherein R is the same or different and is alkyl of one to four carbon atoms, inclusive and X is C 1 -C 5 alkylene or alkylidene, and (b) a modifier combination therefor comprising (i) a coupled resinous block copolymer having blocks comprising polymerized vinyl aromatic units connected to blocks comprising polymerized diene units; and (ii) 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 a mixture of any of the foregoing, said modifier being present in said mixture in an amount of at least sufficient to impart to said mixture a resistance to environmental stress crazing and cracking greater than that possessed by said polycarbonate resin.
Inventors
- 👤 Ping Y. Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:52
CPC Classifications
C; C08; C08L; C08L69/00
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
159 words
A resin mixture comprising: (a) an aromatic polycarbonate resin and (b) a modifier combination therefor comprising (i) a coupled resinous block copolymer having blocks comprising polymerized vinyl aromatic units connected to blocks comprising polymerized diene units; and (ii) 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 a mixture of any of the foregoing, said modifier being present in said mixture in an amount of at least sufficient to impart to said mixture a resistance to environmental stress crazing and cracking greater than that possessed by said polycarbonate resin wherein component (a) comprises from about 50 to about 96 parts by weight; component (b)(i) comprises from about 2 to about 25 parts by weight; and component (b)(ii) comprises from about 2 to about 25 parts by weight, per 100 parts by weight of components (a), (b)(i) and (b)(ii) combined.
Claim 2
Dependent Claim
159 words
A resin mixture comprising: (a) an aromatic polycarbonate resin and (b) a modifier combination therefor comprising (i) a coupled resinous block copolymer having blocks comprising polymerized vinyl aromatic units connected to blocks comprising polymerized diene units; and (ii) 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 a mixture of any of the foregoing, said modifier being present in said mixture in an amount of at least sufficient to impart to said mixture a resistance to environmental stress crazing and cracking greater than that possessed by said polycarbonate resin wherein component (a) comprises from about 50 to about 96 parts by weight; component (b)(i) comprises from about 2 to about 25 parts by weight; and component (b)(ii) comprises from about 2 to about 25 parts by weight, per 100 parts by weight of components (a), (b)(i) and (b)(ii) combined.
Claim 3
Dependent Claim
33 words
A resin mixture a defined in claim 1 wherein in the aromatic carbonate polymer comprises recurring structural units of the formula: ##STR4## wherein A is a divalent aromatic radical of a dihydric phenol.
Claim 4
Dependent Claim
19 words
A resin mixture as defined in claim 2 wherein in said formula, A is derived from a 4,4'-dihydroxy-di(mononuclear aryl)alkane.
Claim 5
Dependent Claim
15 words
A resin mixture as defined in claim 1 wherein said aromatic polycarbonate (a) comprises poly(2,2-dyhydroxydiphenylpropane)carbonate.
Claim 6
Dependent Claim
21 words
A resin mixture as defined in claim 1 wherein said copolymer resin (b)(i) comprises polymerized styrene units and polymerized diene units.
Claim 7
Dependent Claim
21 words
A resin mixture as defined in claim 1 wherein said copolymer component (b)(ii) comprises a copolymer of ethylene and ethyl acrylate.
Claim 8
Dependent Claim
168 words
A resin mixture comprising (a) an aromatic polycarbonate resin as defined in claim 1, and (b) a modifier combination therefor comprising (i) a coupled resinous block copolymer having blocks comprising polymerized vinyl aromatic units connected to blocks comprising polymerized diene units; (ii) 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 or methacrylic acid; and (iii) a polyolefin resin, said modifier being present in an amount sufficient to impart to said mixture a resistance to environmental stress crazing and cracking greater than that possessed by said polycarbonate resin wherein component (a) comprises from about 60 to about 89 parts by weight, component (b)(i) comprises from about 5 to about 20 parts by weight, component (b)(ii) comprises from about 5 to about 20 parts by weight, and component (b)(iii) comprises from about 1 to about 10 parts by weight, per 100 parts by weight of components (a), (b)(i), (b)(ii) and (b)(iii) combined.
Claim 9
Dependent Claim
32 words
A resin mixture as defined in claim 7 wherein the aromatic carbonate polymer comprises recurring structural units of the formula: ##STR5## wherein A is a divalent aromatic radical of a dihydric phenol.
Claim 10
Dependent Claim
19 words
A resin mixture as defined in claim 8 wherein in said formula, A is derived from a 4,4'-dihydroxydi(mononuclear aryl)alkane.
Claim 11
Dependent Claim
15 words
A resin mixture as defined in claim 7 wherein said aromatic polycarbonate (a) comprises poly(2,2-dihydroxydiphenylpropane)carbonate.
Claim 12
Dependent Claim
21 words
A resin mixture as defined in claim 7 wherein said copolymer resin (b)(i) comprises polymerized styrene units and polymerized butadiene units.
Claim 13
Dependent Claim
21 words
A resin mixture as defined in claim 7 wherein said copolymer component (b)(ii) comprises a copolymer of ethylene and ethyl acrylate.
Claim 14
Dependent Claim
27 words
A resin mixture as defined in claim 7 wherein said polyolefin resin (b)(iii) is selected from a polyethylene resin, a polypropylene resin or an ethylene-propylene copolymer resin.
Claim 15
Dependent Claim
20 words
A resin mixture as defined in claim 7 wherein said polyolefin resin (b)(iii) is a linear low density polyolefin resin.
Claim 16
Dependent Claim
22 words
A resin mixture as defined in claim 13 wherein said linear low density polyolefin resin is a linear low density polyethylene resin.
Claim 17
Dependent Claim
22 words
A resin mixture as defined in claim 15 wherein said linear low density polyethylene resin is a copolymer of ethylene and butene-1.
Claim 18
Dependent Claim
18 words
A resin mixture as defined in claim 1 or 7 including a reinforcing amount of a reinforcing agent.
Claim 19
Dependent Claim
16 words
A resin mixture as defined in claim 17 wherein said reinforcing agent is chopped glass filaments.
Claim 20
Dependent Claim
9 words
An article molded from the composition of claim 1.
Claim 21
Dependent Claim
9 words
An article molded from the composition of claim 7.
Claim 22
Dependent Claim
180 words
A resin mixture comprising: (a) an aromatic polycarbonate resin having no more than about 20% of the structural units of the formula ##STR6## wherein R is the same or different and is alkyl of one to four carbon atoms, inclusive and X is C 1 -C 5 alkylene or alkylidene, and (b) a modifier combination therefor comprising (i) a coupled resinous block copolymer having blocks comprising polymerized vinyl aromatic units connected to blocks comprising polymerized diene units; and (ii) 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 a mixture of any of the foregoing, said modifier being present in said mixture in an amount of at least sufficient to impart to said mixture a resistance to environmental stress crazing and cracking greater than that possessed by said polycarbonate resin wherein the amount of modifier combination (b) ranges from about 4.0 to about 50 parts by weight per 100 parts by weight of resin (a) and modifier combination (b) together.
Claim 23
Dependent Claim
180 words
A resin mixture comprising: (a) an aromatic polycarbonate resin having no more than about 20% of the structural units of the formula ##STR6## wherein R is the same or different and is alkyl of one to four carbon atoms, inclusive and X is C 1 -C 5 alkylene or alkylidene, and (b) a modifier combination therefor comprising (i) a coupled resinous block copolymer having blocks comprising polymerized vinyl aromatic units connected to blocks comprising polymerized diene units; and (ii) 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 a mixture of any of the foregoing, said modifier being present in said mixture in an amount of at least sufficient to impart to said mixture a resistance to environmental stress crazing and cracking greater than that possessed by said polycarbonate resin wherein the amount of modifier combination (b) ranges from about 4.0 to about 50 parts by weight per 100 parts by weight of resin (a) and modifier combination (b) together.
Claim 24
Dependent Claim
135 words
A resin mixture comprising (a) an aromatic polycarbonate resin as defined in claim 1, and (b) a modifier combination therefor comprising (i) a coupled resinous block copolymer having blocking comprising polymerized vinyl aromatic units connected to blocks comprising polymerized diene units; (ii) 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 or methacrylic acid; and (iii) a polyolefin resin, said modifier being present in an amount sufficient to impart to said mixture a resistance to environmental stress crazing and cracking greater than that possessed by said polycarbonate resin wherein the amount of modifier combination (b) ranges from about 4.0 to about 50 parts by weight per 100 parts by weight of resin (a) and modifier combination (b) together.
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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) | 1988-12-30 | 1989-07-01 | 1989-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-30 | 1993-07-01 | 1993-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-30 | 1997-07-01 | 1997-12-31 | $7700.00 | Window Closed / Lapsed |