Patent US4014849A successfully refreshed from Google Patents.
US4014849A
Expired / Lapsed
US
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Self-extinguishing reinforced polycarbonate molding compositions
Assignee: BASF SE
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Filing: 1974-11-04
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Granted: 1977-03-29
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Expires: 1994-11-04
Abstract
Abstract Self-extinguishing reinforced molding compositions based on aromatic polycarbonates and containing from 0.5 to 15% by weight, based on the weight of polycarbonate, of red phosphorus and a reinforcing agent such as glass fibers or glass spheres or a filler such as asbestos. The molding compositions are suitable for processing to shaped articles.
Inventors
- 👤 Peter Horn
- 👤 Cai VON Rumohr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:47
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K7/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
62 words
Self-extinguishing reinforced organic polycarbonate molding compositions comprising: a. an organic polycarbonate; b. from 0.5 to 15% by weight of particulate red phosphorus based on the weight of the polycarbonate, said red phosphorus having an average particle diameter of from 0.001 to 0.5 mm; and c. from 5 to 50% by weight of a reinforcing agent based on the weight of the polycarbonate.
Claim 2
Dependent Claim
62 words
Self-extinguishing reinforced organic polycarbonate molding compositions comprising: a. an organic polycarbonate; b. from 0.5 to 15% by weight of particulate red phosphorus based on the weight of the polycarbonate, said red phosphorus having an average particle diameter of from 0.001 to 0.5 mm; and c. from 5 to 50% by weight of a reinforcing agent based on the weight of the polycarbonate.
Claim 3
Dependent Claim
22 words
Self-extinguishing compositions as set forth in claim 1 wherein said red phosphorus has a particle diameter of from 0.01 to 0.15 mm.
Claim 4
Dependent Claim
17 words
Self-extinguishing reinforced molding compositions as set forth in claim 1, wherein the reinforcing agent comprises glass fibers.
Claim 5
Dependent Claim
27 words
Self-extinguishing reinforced molding compositions as set forth in claim 1, wherein the reinforcing agent comprises glass spheres having an average diameter of from 5 to 50 μm.
Claim 6
Dependent Claim
24 words
Self-extinguishing reinforced molding compositions as set forth in claim 1 and containing from 15 to 35% by weight of at least one reinforcing agent.
Claim 7
Dependent Claim
36 words
Self-extinguishing reinforced molding compositions as set forth in claim 3, wherein the glass fibers in the molding composition have a length of from 0.1 to 1 mm and a diameter of from 0.01 to 0.02 mm.
Claim 8
Dependent Claim
33 words
Self-extinguishing reinforced molding compositions as set forth in claim 1, wherein the aromatic polycarbonate is a polycarbonate based on aromatic dihydroxy compounds and phosgene, the phosgene being completely or partially replaced by bischlorocarboxylates.
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) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |