US4468427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blends of polyamide and ethylene vinyl alcohol copolymers
Assignee: Honeywell International Inc
•
Filing: 1983-10-11
•
Granted: 1984-08-28
•
Expires: 2003-10-11
Abstract
Abstract A composition of matter comprising a polyamide, preferably polyepsiloncaprolactam, and from 1 to 65 percent of an ethylene vinyl alcohol copolymer. The composition is useful for making moldings, films, and fibers.
Inventors
- 👤 Alfieri Degrassi
- 👤 William Sacks
- 👤 John P. Sibilia
- 👤 Abraham M. Kotliar
- 👤 Charles D. Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:16
CPC Classifications
C; C08; C08L; C08L29/00; C08L29/02; C08L29/04; C08L77/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31746; Y10T428/3175; Y10T428/31757; Y10T428/31855; Y10T428/31935; Y10T428/31938
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
97 words
A laminate structure comprising a layer of an ethylene vinyl alcohol copolymer; and at least one adjacent layer of a heterogeneous melt blended composition consisting essentially of: a polyamide; and from 1 to 65% by weight of an ethylene vinyl alcohol copolymer having 15 to 65 mol percent ethylene, in the absence of plasticizer, wherein there are regions of ethylene vinyl alcohol copolymer having an average diameter of less than 500 angstroms in the polyamide, said composition having been processed at a temperature of from about 225° C. to 252° C. and being substantially free from crosslinking.
Claim 2
Dependent Claim
97 words
A laminate structure comprising a layer of an ethylene vinyl alcohol copolymer; and at least one adjacent layer of a heterogeneous melt blended composition consisting essentially of: a polyamide; and from 1 to 65% by weight of an ethylene vinyl alcohol copolymer having 15 to 65 mol percent ethylene, in the absence of plasticizer, wherein there are regions of ethylene vinyl alcohol copolymer having an average diameter of less than 500 angstroms in the polyamide, said composition having been processed at a temperature of from about 225° C. to 252° C. and being substantially free from crosslinking.
Claim 3
Dependent Claim
12 words
The laminate as recited in claim 1 wherein the polyamide is polyepsiloncaprolactam.
Claim 4
Dependent Claim
24 words
The laminate as recited in claim 2 wherein there is from 10 to 30 percent ethylene vinyl alcohol copolymer in the layer containing polyepsiloncaprolactam.
Claim 5
Dependent Claim
25 words
The laminate as recited in claim 1 wherein there is from 1 to 50 percent ethylene vinyl alcohol copolymer in the layer containing the polyamide.
Claim 6
Dependent Claim
94 words
A film having a thickness of from about 0.5 mils to about 5 mils made from a heterogeneous melt blended composition consisting essentially of: a polyamide; and from 1 to 65% by weight of an ethylene vinyl alcohol copolymer haing 15 to 65 mol percent ethylene, in the absence of plasticizer, wherein there are regions of ethylene vinyl alcohol copolymer having an average diameter of less than 500 angstroms in the polyamide, said composition having been processed at a temperature of from about 225° C. to 252° C. and being substantially free from crosslinking.
Claim 7
Dependent Claim
94 words
A film having a thickness of from about 0.5 mils to about 5 mils made from a heterogeneous melt blended composition consisting essentially of: a polyamide; and from 1 to 65% by weight of an ethylene vinyl alcohol copolymer haing 15 to 65 mol percent ethylene, in the absence of plasticizer, wherein there are regions of ethylene vinyl alcohol copolymer having an average diameter of less than 500 angstroms in the polyamide, said composition having been processed at a temperature of from about 225° C. to 252° C. and being substantially free from crosslinking.
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) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |