Patent US4942206A successfully refreshed from Google Patents.
US4942206A
Expired / Lapsed
US
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Blends and copolymers of polyetherimide and functionalized polyphenylene ether
Assignee: SABIC Global Technologies BV
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Filing: 1988-06-21
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Granted: 1990-07-17
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Expires: 2008-06-21
Abstract
Abstract Polymer blends and copolymers made therefrom, of anhydride-functionalized polyphenylene ether and polyetherimide. The components of the blends have improved compatibility, resulting in more homogeneous blends. The blends exhibit good mechanical properties and are suitable for forming films, molded products and other useful articles of manufacture. The copolymers have utility as compatibilizers for blends of polyphenylene ether and polyetherimide.
Inventors
- 👤 Dwain M. White
- 👤 Laura A. Socha
- 👤 Roelof van der Meer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:17
CPC Classifications
C; C08; C08L; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/126; C08L79/00; C08L79/04; C08L79/08; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
11 words
A polyphenylene oxide-polyetherimide copolymer comprising anhydride-functionalized polyphenylene oxide and amine-terminated polyetherimide.
Claim 2
Dependent Claim
11 words
A polyphenylene oxide-polyetherimide copolymer comprising anhydride-functionalized polyphenylene oxide and amine-terminated polyetherimide.
Claim 3
Dependent Claim
20 words
A copolymer according to claim 1, wherein the copolymer comprises about 2 to 50% by weight of anhydride-functionalized polyphenylene oxide.
Claim 4
Dependent Claim
19 words
A copolymer according to claim 1, wherein the copolymer comprises about 2 to 50% by weight of amine-terminated polyetherimide.
Claim 5
Dependent Claim
15 words
A copolymer according to claim 1, wherein the anhydride-functionalized polyphenylene oxide is anhydride-functionalized poly(2,6-dimethyl-1,4-phenylene oxide).
Claim 6
Dependent Claim
22 words
A copolymer according to claim 1, wherein the anhydride-functionalized polyphenylene oxide comprises the reaction product of poly(2,6-dimethyl-4-phenylene-oxide) and trimellitic anhydride acid chloride.
Claim 7
Dependent Claim
22 words
A copolymer according to claim 1, wherein the anhydride-functionalized polyphenylene oxide comprises the reaction product of poly(2,6-dimethyl-1,4-phenylene oxide) and maleic acid anhydride.
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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) | 1993-07-16 | 1994-01-15 | 1994-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-16 | 1998-01-15 | 1998-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-16 | 2002-01-15 | 2002-07-17 | $7700.00 | Window Closed / Lapsed |