US4514543A
Expired / Lapsed
US
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Methylmethacrylate/phenylmaleimide copolymer and styrene/maleic anhydride copolymer
Assignee: Lyondell Chemical Technology LP
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Filing: 1983-10-03
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Granted: 1985-04-30
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Expires: 2003-10-03
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
2026-11-07 07:43
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: 15
Claim 1
Independent Claim
101 words
A polymer alloy comprising a first and a second polymer wherein, (a) the first polymer is a random copolymer consisting essentially of recurring units of methylmethacrylate and recurring units of N-phenylmaleimide; and (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.
Claim 2
Dependent Claim
101 words
A polymer alloy comprising a first and a second polymer wherein, (a) the first polymer is a random copolymer consisting essentially of recurring units of methylmethacrylate and recurring units of N-phenylmaleimide; and (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.
Claim 3
Dependent Claim
18 words
The polymer alloy of claim 1 in which said second polymer is a random copolymer of styrene/maleic anhydride.
Claim 4
Dependent Claim
18 words
A polymer alloy of claim 1 in which said second polymer is a random terpolymer of styrene/maleic anhydride/N-phenylmaleimide.
Claim 5
Dependent Claim
32 words
The polymer alloy of claim 1 in which said first polymer is present in an amount within the range of from about 1 to 99 weight percent based on the polymer matrices.
Claim 6
Dependent Claim
32 words
The polymer alloy of claim 1 in which said second polymer is present in an amount within the range of from about 1 to 99 weight percent based on the polymer matrices.
Claim 7
Dependent Claim
22 words
The polymer alloy of claim 1, in which in said first polymer N-phenylmaleimide is from about 1 to about 50 weight percent.
Claim 8
Dependent Claim
22 words
The polymer alloy of claim 1 in which in said first polymer methylmethacrylate is from about 99 to about 50 weight percent.
Claim 9
Dependent Claim
32 words
The polymer alloy of claim 2 in which said second polymer is from about 9.5 to about 12.5 weight percent maleic anhydride and from about 90.5 to about 87.5 weight percent styrene.
Claim 10
Dependent Claim
41 words
The polymer alloy of claim 3 in which said second polymer is from about 91 to about 84 weight percent styrene, from about 6 to about 9 weight percent maleic anhydride and from about 3 to about 8 weight percent N-phenylmaleimide.
Claim 11
Dependent Claim
25 words
The polymer alloy of claim 1 comprising a styrene/acrylonitrile copolymer and containing at least 30 weight percent of said first copolymer of the total polymers.
Claim 12
Dependent Claim
10 words
The polymer alloy of claim 1 comprising a styrene/acrylonitrile/N-phenylmaleimide terpolymer.
Claim 13
Dependent Claim
13 words
The polymer alloy of claim 1 in the form of a molded article.
Claim 14
Independent Claim
122 words
A method of producing a molded article which comprises: (a) preparing a polymer alloy comprising a first and a second polymer wherein, (i) the first polymer is a random copolymer consisting essentially of recurring units of recurring units of methylmethacrylate and recurring units of N-phenylmaleimide; and (ii) 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 (b) molding the resulting polymer alloy.
Claim 15
Independent Claim
122 words
A method of producing a molded article which comprises: (a) preparing a polymer alloy comprising a first and a second polymer wherein, (i) the first polymer is a random copolymer consisting essentially of recurring units of recurring units of methylmethacrylate and recurring units of N-phenylmaleimide; and (ii) 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 (b) molding the resulting polymer alloy.
References Cited (Backward Citations)
US3676404A
Cited
US4381373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-29 | 1988-10-29 | 1989-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-29 | 1992-10-29 | 1993-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-29 | 1996-10-29 | 1997-04-30 | $7700.00 | Window Closed / Lapsed |