US4048133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass fiber-reinforced thermoplastic polycarbonate molding compositions with improved tough-elastic properties
Assignee: Bayer AG
•
Filing: 1976-07-06
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Granted: 1977-09-13
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Expires: 1996-07-06
Abstract
Abstract The present invention relates to glass fiber reinforced thermoplastic polycarbonate molding compositions whose toughness and elastic properties have been improved by the incorporation of 1 to 5 wt.% of poly-(2,6-dialkyl-1,4-phenyleneoxide). These compositions contain between 10 and 30 wt.% glass fibers and display improved properties even after extended times at high humidity. The polyphenylene oxides preferably have M w between 2,000 and 100,000, most preferably 20,000 and 60,000. A particularly suitable additive is poly-(2,6-dimethyl-1,4-phenylene oxide).
Inventors
- 👤 Siegfried Adelmann
- 👤 Dieter Margotte
- 👤 Josef Merten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:08
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/14; C08G; C08G64/00; C08G64/04; C08G64/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
42 words
Polycarbonate molding compositions based on high molecular thermoplastic aromatic polycarbonates containing 10-30% by weight of glass fibers (relative to the total weight of polycarbonate + glass fibers) and containing 1-5% by weight of poly-(256-dialkyl-1,4-phenylene oxide) (relative to the weight of glass fibers).
Claim 2
Dependent Claim
42 words
Polycarbonate molding compositions based on high molecular thermoplastic aromatic polycarbonates containing 10-30% by weight of glass fibers (relative to the total weight of polycarbonate + glass fibers) and containing 1-5% by weight of poly-(256-dialkyl-1,4-phenylene oxide) (relative to the weight of glass fibers).
Claim 3
Dependent Claim
12 words
Polycarbonate molding compositions according to claim 1, wherein they contain poly-(2,6-dimethyl-1,4-phenylene oxide).
Claim 4
Dependent Claim
19 words
Polycarbonate molding compositions according to claim 1, wherein poly-(2,6-dialkyl-1,4-phenylene oxides) with M w between 2000 and 100,000 are employed.
Claim 5
Dependent Claim
28 words
Polycarbonate molding compositions according to claim 3 wherein the poly-(2,6-dialkyl-1,4-phenylene oxides) have M w between 20,000 and 60,000 and the polycarbonate have M w between 10,000 and 100,000.
Claim 6
Dependent Claim
41 words
Polycarbonate molding compositions according to claim 4 wherein the glass fibers are low alkali aluminum-borosilicate glass having a maximum alkali metal content of 0.8 wt.%, a diameter of 8-15μ and a length of either 150 to 300μ or 3600 to 6000μ.
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) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |