US3676400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic blends of high-amine-end poly-amides and acid-containing olefin polymers
Assignee: EIDP Inc
•
Filing: 1970-11-13
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Granted: 1972-07-11
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Expires: 1990-11-13
Abstract
Abstract The strength properties of blends of 50 to 90 percent by weight polyamide having a molecular weight of at least 10,000 with 10 to 50 percent by weight of an olefin copolymer containing from 0.1 to 10 mole percent of groups derived from an Alpha , Beta unsaturated carboxylic acid, are improved by having at least 60 percent of the polyamide end groups being amine end groups.
Inventors
- 👤 Melvin I Kohan
- 👤 Wayne H Martin
- 👤 Chester K Rosenbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:24
CPC Classifications
C; C08; C08L; C08L53/00; C08L77/00; C08L77/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
23 words
The composition of claim 1 wherein the excess number of amine end groups in the polyamide is from 25 to 60 as defined.
Claim 2
Dependent Claim
29 words
The composition of claim 1 wherein said olefin copolymer is a copolymer of ethylene and from 0.1 to 10 mole percent of an Alpha , Beta -unsaturated carboxylic acid.
Claim 3
Dependent Claim
16 words
The composition of claim 3 wherein the said Alpha , Beta -unsaturated acid is methacrylic acid.
Claim 4
Dependent Claim
24 words
The composition of claim 1 containing from 0.05 to 2.0 percent each of thermal stabilizer and antioxidant, based on the weight of said polyamide.
Claim 5
Dependent Claim
17 words
The composition of claim 5 wherein said thermal stabilizer is sodium hypophosphite and said antioxidant is 4,4''-butylidene-bis-6-t-butyl-m-cresol.
Claim 6
Dependent Claim
16 words
The composition of claim 1 wherein said excess is 33 gram equivalents of amine end groups.
References Cited (Backward Citations)
US3274289A
Cited
FR1386563A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |