US4350799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic ternary molding composition of polyurethane polyphosphonates and polycarbonate resins
Assignee: Bayer Corp
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Filing: 1981-09-16
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Granted: 1982-09-21
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Expires: 2001-09-16
Abstract
Abstract The invention is directed to a molding composition comprising an intimate, well dispersed blend of thermoplastic polyurethane, thermoplastic polyphosphonate and thermoplastic polycarbonate which composition is characterized by an improved level of flame resistance. A process for the preparation of said composition is also disclosed.
Inventors
- 👤 Hans G. Schmelzer
- 👤 Manfred Schmidt
- 👤 Robert P. Yeater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:22
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
12 words
A well dispersed thermoplastic ternary molding composition comprising polyurethane, polycarbonate and polyphosphonate.
Claim 2
Dependent Claim
12 words
A well dispersed thermoplastic ternary molding composition comprising polyurethane, polycarbonate and polyphosphonate.
Claim 3
Dependent Claim
58 words
The molding composition of claim 1, wherein said polyphosphonate is characterized by the molecular structure comprising ##STR8## wherein X denotes an aromatic radical and R 1 denotes C 1 -C 12 alkyl, C 2 -C 12 alkenyl, C 6 -C 30 cycloalkyl, C 6 -C 30 cycloalkenyl, C 7 -C 30 arylalkyl or C 8 -C 30 arylalkenyl.
Claim 4
Dependent Claim
24 words
The molding composition of claim 1 wherein said polycarbonate constitutes from about 0.5 to about 80 percent relative to the weight of said composition.
Claim 5
Dependent Claim
24 words
The molding composition of claim 1 wherein said polyphosphonate constitute from about 0.5 to about 80 percent relative to the weight of said composition.
Claim 6
Dependent Claim
21 words
The molding composition of claim 1 or 4 wherein said polyphosphonate is selected from the group consisting of polymethylphosphonate and polyethylphosphonate.
Claim 7
Dependent Claim
38 words
A process for the preparation of a well-dispersed thermoplastic ternary molding composition comprising (i) blending upon comelting of polyphosphonate and polycarbonate resins to obtain a binary composition (ii) blending upon comelting of said binary composition with thermoplastic urethane.
Claim 8
Dependent Claim
38 words
A process for the preparation of a well-dispersed thermoplastic ternary molding composition comprising (i) blending upon comelting of polyphosphonate and polycarbonate resins to obtain a binary composition (ii) blending upon comelting of said binary composition with thermoplastic urethane.
Claim 9
Dependent Claim
15 words
The process of claim 6 wherein said blending upon comelting is carried out by extrusion.
Claim 10
Dependent Claim
58 words
The process of claim 6 wherein said polyphosphonate is characterized by the molecular structure comprising ##STR9## wherein X denotes an aromatic radical and R 1 denotes C 1 -C 12 alkyl, C 2 -C 12 alkenyl, C 6 -C 30 cycloalkyl and C 6 -C 30 cycloalkenyl, C 7 -C 30 arylalkyl, and C 8 -C 30 arylalkenyl.
Claim 11
Dependent Claim
17 words
The process of claim 6 wherein said polycarbonate constitutes at least 10 percent of said binary composition.
Claim 12
Dependent Claim
18 words
The process of claim 6 wherein said polyphosphonate is selected from the group consisting of polymethylphosphonate and polyethylphosphonate.
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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) | 1985-09-20 | 1986-03-22 | 1986-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-20 | 1990-03-22 | 1990-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-20 | 1994-03-22 | 1994-09-21 | $7700.00 | Window Closed / Lapsed |