Patent US4169866A successfully refreshed from Google Patents.
US4169866A
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Polymer systems containing polycarbodiimides and thermoplastic polymer
Assignee: Bayer AG
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Filing: 1977-04-04
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Granted: 1979-10-02
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Expires: 1997-04-04
Abstract
Abstract Thermoplastically processible polymer systems containing a polycarbodiimide as a polymer component.
Inventors
- 👤 Wulf von Bonin
- 👤 Wolfgang Oberkirch
- 👤 Ulrich VON Gizycki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:54
CPC Classifications
C; C08; C08L; C08L79/00; C08L101/00; C08L27/00; C08L29/00; C08L35/00; C08L39/00; Y; Y10; Y10S; Y10S525/00; Y10S525/907
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
101 words
A thermoplastic processible polymer system comprising a homogeneous mixture of (A) from 0.5 to 95% by weight of a polycarbodiimide obtained by the catalyzed intermolecular elimination of CO 2 from an isocyanate prepolymer having a molecular weight of from 500 to 10,000 and obtained by reacting a polyisocyanate with at least one member selected from the group consisting of polyesters and polyethers and (B) 99.5 to 5% by weight of a thermoplastic polymer selected from the group consisting of copolymers of styrene and acrylonitrile, ABS-polymers, polyacrylates, polymethacrylates, polyphenylene ethers, polystyrene, polyacetals, polycarbonates, polyurethanes, polyamides, polyolefins and copolymers of ethylene and vinylacetate.
Claim 2
Dependent Claim
101 words
A thermoplastic processible polymer system comprising a homogeneous mixture of (A) from 0.5 to 95% by weight of a polycarbodiimide obtained by the catalyzed intermolecular elimination of CO 2 from an isocyanate prepolymer having a molecular weight of from 500 to 10,000 and obtained by reacting a polyisocyanate with at least one member selected from the group consisting of polyesters and polyethers and (B) 99.5 to 5% by weight of a thermoplastic polymer selected from the group consisting of copolymers of styrene and acrylonitrile, ABS-polymers, polyacrylates, polymethacrylates, polyphenylene ethers, polystyrene, polyacetals, polycarbonates, polyurethanes, polyamides, polyolefins and copolymers of ethylene and vinylacetate.
Claim 3
Dependent Claim
16 words
The polymer system of claim 1 wherein (A) has a glass transition temperature below 0° C.
References Cited (Backward Citations)
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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) | 1982-10-01 | 1983-04-02 | 1983-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-01 | 1987-04-02 | 1987-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-01 | 1991-04-02 | 1991-10-02 | $7700.00 | Window Closed / Lapsed |