US4287314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Maleimide-styrene copolymer blend with polyurethane
Assignee: Lyondell Chemical Technology LP
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Filing: 1980-09-05
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Granted: 1981-09-01
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Expires: 2000-09-05
Abstract
Abstract An advantageous blend suitable for compression molding, injection molding, or general molding of plastic articles is prepared by mechanically mixing at an elevated controlled temperature a polyurethane resin and a resin derived from copolymerization maleimide and styrene.
Inventors
- 👤 Ronald A. Fava
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:43
CPC Classifications
C; C08; C08L; C08L35/00; C08L35/06; C08L75/00; C08L75/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
47 words
A thermoplastic composition for molding of plastic articles consisting of a blend of A. polyurethane B. a resin containing 5 to 35% maleimide and 65 to 95% styrene each of components A and B being present in a weight concentration within a range from 40% to 60%.
Claim 2
Dependent Claim
47 words
A thermoplastic composition for molding of plastic articles consisting of a blend of A. polyurethane B. a resin containing 5 to 35% maleimide and 65 to 95% styrene each of components A and B being present in a weight concentration within a range from 40% to 60%.
Claim 3
Dependent Claim
15 words
The thermoplastic composition of claim 1 in which the resin contains 7 to 14% maleimide.
Claim 4
Dependent Claim
15 words
The thermoplastic composition of claim 1 in which the resin B contains about 8% maleimide.
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) | 1984-08-31 | 1985-03-02 | 1985-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-31 | 1989-03-02 | 1989-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-31 | 1993-03-02 | 1993-09-01 | $7700.00 | Window Closed / Lapsed |