US4668723A
Expired / Lapsed
US
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Polyphenylene ether compositions containing polyfunctional compounds
Assignee: General Electric Co
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Filing: 1985-10-11
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Granted: 1987-05-26
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Expires: 2005-10-11
Abstract
Abstract The sensitivity to stresses and the melt strength of thermoplastic polymer mixtures which comprise a polyphenylene ether and a polyvinyl aromatic compound can be improved by the addition of a polyfunctional dienophilic compound, for example, a bismaleimide or of a polyfunctional conjugated diene compound, for example, divinyl benzene.
Inventors
- 👤 Jan Bussink
- 👤 Roelof van der Meer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:28
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/06; C08F283/08; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
49 words
A polymer mixture comprising the following constituents: (A) a polyphenylene ether; (B) a polyvinyl aromatic compound, and (C) a polyfunctional dienophilic compound is 0.01-4% by weight calculated with respect to the sum of the parts by weight of the A plus the B and said mixture is thermoplastically deformable.
Claim 2
Dependent Claim
49 words
A polymer mixture comprising the following constituents: (A) a polyphenylene ether; (B) a polyvinyl aromatic compound, and (C) a polyfunctional dienophilic compound is 0.01-4% by weight calculated with respect to the sum of the parts by weight of the A plus the B and said mixture is thermoplastically deformable.
Claim 3
Dependent Claim
28 words
A polymer mixture as claimed in claim 1, characterized in that the polymer mixture has been prepared by mixing the constituents A, B, and C in the melt.
Claim 4
Dependent Claim
46 words
A polymer mixture as claimed in claim 1, characterized in that the polymer mixture comprises 5-95% by weight of A, 5-95% by weight of B, and 0.01-4% by weight of C calculated with respect to the sum of the parts by weight of A and B.
Claim 5
Dependent Claim
20 words
A polymer mixture as claimed claim 1, characterized in that the polymer mixture comprises a high-impact polystyrene as constituent B.
Claim 6
Dependent Claim
34 words
A polymer mixture as claimed in claim 1, characterized in that the polymer mixture comprises as constituent C more than 0.01% by weight, but less than 1% by weight, of the polyfunctional dienophilic compound.
Claim 7
Dependent Claim
20 words
A polymer mixture as claimed in claim 5, characterized in that the polymer mixture comprises a bismaleimide as constituent C.
Claim 8
Dependent Claim
42 words
A polymer mixture as claimed in claim 1, characterized in that the polymer mixture comprises one or more of the following constituents: an agent to improve the tensile strength, a filler, glass fibres, carbon fibres, antistatics, stabilizers, plasticizer, flame retarding agents, dyes.
Claim 9
Dependent Claim
11 words
A polymer mixture as in claim 1, further comprising a polyolefin.
References Cited (Backward Citations)
US3383435A
Cited
US4389516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |