US4663390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methylmethacrylate/phenylmaleimide copolymer and styrene/maleic anhydride copolymer containing polymer alloys
Assignee: Lyondell Chemical Technology LP
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Filing: 1985-04-01
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Granted: 1987-05-05
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Expires: 2005-04-01
Abstract
Abstract Polymer alloys containing copolymers of methylmethacrylate/N-phenylmaleimide are disclosed. In one embodiment the polymer alloy is an alloy of methylmethacrylate/N-phenylmaleimide and styrene/maleic anhydride. In another embodiment, the polymer alloy is an alloy of methylmethacrylate/N-phenylmaleimide and styrene/maleic anhydride/N-phenylmaleimide.
Inventors
- 👤 Barry D. Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:04
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12; C08L35/00; C08L35/06; C08L51/00; C08L51/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
A polymer alloy comprising a first, second and graft third polymer wherein (a) the first polymer is a random copolymer consisting essentially of recurring units of methylmethacrylate and recurring units of N-phenylmaleimide, (b) the second polymer is selected from the group consisting essentially of a random copolymer of recurring units of styrene and from about 9.5 to about 12.5 weight percent recurring units of maleic anhydride and a random terpolymer of recurring units of styrene, from about 6 to about 9 weight percent recurring units of maleic anhydride and from about 3 to about 8 weight percent recurring units of N-phenylmaleimide, and (c) the grafted third polymer is selected from the group consisting essentially of a random copolymer of recurring units of styrene and recurring units of acrylonitrile and a random terpolymer of recurring units of styrene, recurring units of acrylonitrile and recurring units of N-phenylmaleimide; wherein said first polymer is present in an amount of at least 30 weight percent based on the polymer matrices and wherein said third polymer is chemically grafted to a rubber.
Claim 2
Dependent Claim
177 words
A polymer alloy comprising a first, second and graft third polymer wherein (a) the first polymer is a random copolymer consisting essentially of recurring units of methylmethacrylate and recurring units of N-phenylmaleimide, (b) the second polymer is selected from the group consisting essentially of a random copolymer of recurring units of styrene and from about 9.5 to about 12.5 weight percent recurring units of maleic anhydride and a random terpolymer of recurring units of styrene, from about 6 to about 9 weight percent recurring units of maleic anhydride and from about 3 to about 8 weight percent recurring units of N-phenylmaleimide, and (c) the grafted third polymer is selected from the group consisting essentially of a random copolymer of recurring units of styrene and recurring units of acrylonitrile and a random terpolymer of recurring units of styrene, recurring units of acrylonitrile and recurring units of N-phenylmaleimide; wherein said first polymer is present in an amount of at least 30 weight percent based on the polymer matrices and wherein said third polymer is chemically grafted to a rubber.
References Cited (Backward Citations)
JPS58129043A
Cited
US4514543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-04 | 1990-11-03 | 1991-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-04 | 1994-11-03 | 1995-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-04 | 1998-11-03 | 1999-05-05 | $7700.00 | Window Closed / Lapsed |