US4749746A
Expired / Lapsed
US
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Polymer composition containing polycarbonate, a styrenic/maleimide/cyclic anhydride terpolymer and a terpolymer grafted to a polymer matrix
Assignee: Lyondell Chemical Technology LP
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Filing: 1987-01-15
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Granted: 1988-06-07
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Expires: 2007-01-15
Abstract
Abstract A polymer composition which contains a polycarbonate resin, a styrenic/maleimide/cyclic anhydride terpolymer, and an ethylene/propylene/nonconjugated diene terpolymer chemically grafted with either styrene/acrylonitrile copolymer, methylmethacrylate/N-phenylmaleimide copolymer or polymethylmethacrylate is disclosed. The composition exhibits excellent impact strength properties upon molding.
Inventors
- 👤 Barry D. Dean
- 👤 Bi Le-Khac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:40
CPC Classifications
C; C08; C08L; C08L35/00; C08L35/06; C08L69/00; C08L51/00; C08L51/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A polymer composition comprising: (A) from about 1 to about 99 weight percent of a thermoplastic polycarbonate resin based on bis-(hydroxyaryl)alkanes, (B) from about 99 to about 1 weight percent of a random terpolymer containing from about 70 to about 90 weight percent recurring units of a monovinyl aromatic monomer, from about 2 to about 24 weight percent recurring units of a maleimide monomer, and from about 2 to about 24 weight percent recurring units of an α, β ethylenically unsaturated cyclic anhydride monomer; and (C) from about 1 to about 20 parts per 100 parts by weight of (A)+(B) of from about 20 to about 80 weight percent of an ethylene/propylene/non-conjugated diene terpolymer grafted with from about 20 to about 80 weight percent styrene/acrylonitrile copolymer containing from about 22 to about 35 percent by weight acrylonitrile, said styrene/acrylonitrile copolymer being thermodynamically miscible with at least one of (A) and (B).
Claim 2
Dependent Claim
151 words
A polymer composition comprising: (A) from about 1 to about 99 weight percent of a thermoplastic polycarbonate resin based on bis-(hydroxyaryl)alkanes, (B) from about 99 to about 1 weight percent of a random terpolymer containing from about 70 to about 90 weight percent recurring units of a monovinyl aromatic monomer, from about 2 to about 24 weight percent recurring units of a maleimide monomer, and from about 2 to about 24 weight percent recurring units of an α, β ethylenically unsaturated cyclic anhydride monomer; and (C) from about 1 to about 20 parts per 100 parts by weight of (A)+(B) of from about 20 to about 80 weight percent of an ethylene/propylene/non-conjugated diene terpolymer grafted with from about 20 to about 80 weight percent styrene/acrylonitrile copolymer containing from about 22 to about 35 percent by weight acrylonitrile, said styrene/acrylonitrile copolymer being thermodynamically miscible with at least one of (A) and (B).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-07 | 1991-12-07 | 1992-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-07 | 1995-12-07 | 1996-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-07 | 1999-12-07 | 2000-06-07 | $7700.00 | Window Closed / Lapsed |