US4293662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamides containing oxidized polyethylene
Assignee: Bayer AG
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Filing: 1979-12-03
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Granted: 1981-10-06
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Expires: 1999-12-03
Abstract
Abstract High impact resistant polymer blends comprising 70-99% by weight of a polyamide and 1-30% by weight of a polyethylene having been oxidized by a special process.
Inventors
- 👤 Frieder Heydenreich
- 👤 Helmut Korber
- 👤 Peter Tacke
- 👤 Friedrich Fahnler
- 👤 Dieter Neuray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:23
CPC Classifications
C; C08; C08L; C08L77/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
112 words
A high-impact resistant polyamide moulding composition consisting of a mixture of (1) 70 to 99% by weight, based on the mixture as a whole, of at least one polyamide and (2) 1 to 30% by weight, based on the mixture as a whole, of oxidized polyethylene, the oxidised polyethylene having a number average molecular weight of from 15,000 to 25,000 and having been obtained by oxidising polyethylene in the melt with oxygen or an oxygen-containing gas, under intensive mixing and kneading under a pressure of from 1 to 150 bars, at a temperature in the range of from 100° to 300° C. and over a reaction time of at most 20 minutes.
Claim 2
Dependent Claim
112 words
A high-impact resistant polyamide moulding composition consisting of a mixture of (1) 70 to 99% by weight, based on the mixture as a whole, of at least one polyamide and (2) 1 to 30% by weight, based on the mixture as a whole, of oxidized polyethylene, the oxidised polyethylene having a number average molecular weight of from 15,000 to 25,000 and having been obtained by oxidising polyethylene in the melt with oxygen or an oxygen-containing gas, under intensive mixing and kneading under a pressure of from 1 to 150 bars, at a temperature in the range of from 100° to 300° C. and over a reaction time of at most 20 minutes.
Claim 3
Dependent Claim
30 words
A moulding composition as claimed in claim 1, consisting of a mixture of 80 to 99% by weight of component (1) and 1 to 20% by weight of component (2).
Claim 4
Dependent Claim
21 words
A moulding composition as claimed in claim 1, wherein the oxidised polyethylene contains from 1,000 to 10,000 ppm of active oxygen.
Claim 5
Dependent Claim
30 words
A moulding composition as claimed in claim 1, wherein the polyamide has a relative viscosity of at least 2.3 (measured as a 1% polyamide solution in m-cresol at 25° C.
Claim 6
Dependent Claim
17 words
A moulding composition as claimed in claim 1, wherein as polyamide component polyamide-6 or polyamide-6,6 is used.
Claim 7
Dependent Claim
11 words
Mouldings prepared from a moulding composition as claimed in claim 1.
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) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |