US4503183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycarbonate resin molding composition
Assignee: General Electric Co
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Filing: 1983-11-07
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Granted: 1985-03-05
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Expires: 2003-11-07
Abstract
Abstract This application discloses novel thermoplastic polycarbonate molding compositions which include a multiphase composite interpolymer; a copolymer of acrylonitrile, butadiene and an alkenyl aromatic compound; and an olefin-acrylate copolymer.
Inventors
- 👤 Ping Y. Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:42
CPC Classifications
C; C08; C08L; C08L69/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
122 words
A composition which comprises (a) a major quantity of a high molecular weight polycarbonate resin; (b) a multiphase composite interpolymer which comprises a C 1-5 acrylate and a C 1-5 methacrylate; (c) a copolymer of a C 2-5 olefin and a C 1-5 acrylate; and (d) a copolymer of acrylonitrile, butadiene and an alkenyl aromatic compound; the quantities of (b), (c) and (d) such that a high melt flow index is obtained and wherein as measured by the weight of (a), (b), (c) and (d) together, (a) is from about 55 to 95 weight percent, (b) is from 0.5 to 15 weight percent, (c) is from about 0.5 to 10 weight percent and (d) is from about 2 to 35 weight percent.
Claim 2
Dependent Claim
122 words
A composition which comprises (a) a major quantity of a high molecular weight polycarbonate resin; (b) a multiphase composite interpolymer which comprises a C 1-5 acrylate and a C 1-5 methacrylate; (c) a copolymer of a C 2-5 olefin and a C 1-5 acrylate; and (d) a copolymer of acrylonitrile, butadiene and an alkenyl aromatic compound; the quantities of (b), (c) and (d) such that a high melt flow index is obtained and wherein as measured by the weight of (a), (b), (c) and (d) together, (a) is from about 55 to 95 weight percent, (b) is from 0.5 to 15 weight percent, (c) is from about 0.5 to 10 weight percent and (d) is from about 2 to 35 weight percent.
Claim 3
Dependent Claim
20 words
A thermoplastic molding composition as defined in claim 1 wherein component (d) is a copolymer of acrylonitrile, butadiene and styrene.
Claim 4
Dependent Claim
29 words
A thermoplastic molding composition as defined in claim 2 wherein the polycarbonate resin is of the formula: ##STR3## wherein A is a divalent aromatic radical of a dihydric phenol.
Claim 5
Dependent Claim
36 words
A thermoplastic molding composition as defined in claim 3 wherein the polycarbonate resin is of the formula: ##STR4## wherein R 1 and R 2 are hydrogen, (lower) alkyl or phenyl and n is at least 100.
Claim 6
Dependent Claim
21 words
A thermoplastic molding composition as defined in claim 4 wherein the multiphase composite interpolymer comprises methyl methacrylate and comprises n-butyl acrylate.
Claim 7
Dependent Claim
17 words
A thermoplastic molding composition as defined in claim 5 wherein the polycarbonate resin is derived from 2,2-bis-(4-hydroxyphenyl)propane.
Claim 8
Dependent Claim
18 words
A thermoplastic molding composition as defined in claim 1 which includes a reinforcing amount of a reinforcing filler.
Claim 9
Dependent Claim
16 words
A thermoplastic molding composition as defined in claim 1 wherein the reinforcing filler is filamentous glass.
Claim 10
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 11
Dependent Claim
20 words
A thermoplastic molding composition as defined in claim 7 which includes a flame retardant amount of a flame retardant agent.
Claim 12
Dependent Claim
39 words
A composition in accordance with claim 1 wherein (b), (c) and (d) are in such quantities that impact strength of the compositions in thick section, compatibility as measured by double gate impact and melt flow index all remain high.
Claim 13
Dependent Claim
26 words
A composition in accordance with claim 11 wherein in (d) the weight ratio of acrylonitrile: butadiene:vinyl aromatic compound is from about 15-30: 20-40 : 30-65 respectively.
Claim 14
Dependent Claim
14 words
A composition in accordance with claim 12 wherein the vinyl aromatic compound is styrene.
Claim 15
Dependent Claim
23 words
A composition in accordance with claim 13 wherein the weight ratio of acrylonitrile:butadiene: styrene is from about 17-25 : 22-38 : 37-61, respectively.
Claim 16
Dependent Claim
43 words
A composition in accordance with claim 1 wherein (a) is from about 80-95 weight percent, (b) is from about 1 to 12 weight percent, (c) is from about 1 to 5 weight percent and (d) is from about 4 to 12 weight percent.
Claim 17
Dependent Claim
27 words
A composition in accordance with claim 15 wherein (a) is bisphenol-A polycarbonate, (b) comprises n-butyl acrylate and methylmethacrylate, (c) is ethylene ethyl acrylate and (d) is acrylonitrile-butadiene-styrene.
Claim 18
Dependent Claim
22 words
A composition in accordance with claim 15 wherein the weight ratio of acrylonitrile:butadiene: styrene are about 15-30 : 20-40 : 30-65 respectively.
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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) | 1988-03-04 | 1988-09-03 | 1989-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-04 | 1992-09-03 | 1993-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-04 | 1996-09-03 | 1997-03-05 | $7700.00 | Window Closed / Lapsed |