US4444817A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminar articles of polyolefin and a condensation polymer
Assignee: EIDP Inc
•
Filing: 1982-09-29
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Granted: 1984-04-24
•
Expires: 2002-09-29
Abstract
Abstract Laminar articles are disclosed comprising a heterogeneous melt of a polyolefin and a condensation polymer incompatible with the polyolefin along with an alkylcarboxyl-substituted polyolefin as a compatibilizing material.
Inventors
- 👤 Pallatheri M. Subramanian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:28
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; B; B29; B29C; B29C48/00; B29C48/022; B29C49/00; B29C49/22; C08J3/00; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; B29C2949/00; B29C2949/07; B29C2949/081; B29C2949/0811; B29C2949/0817; B29C2949/0819; B29C2949/0838; B29C48/03; B29C48/05; B29C48/07; B29C48/08; B29C48/09; B29C48/10; B29K; B29K2023/00; B29K2067/00; B29K2077/00; C08J2323/00; C08J2323/02; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1372; Y10T428/139; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/31504; Y10T428/31725; Y10T428/3175; Y10T428/31757; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31928
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
82 words
A laminar, shaped, article comprising a combination of polyolefin, a condensation polymer incompatible with the polyolefin, and an alkylcarboxyl-subsituted polyolefin wherein the polyolefin is present in the article as a continuous matrix phase and the condensation polymer is present in the article, as a discontinuous distributed phase in the form of a multitude of thin, substantially two-dimensional, parallel and overlapping layers of material embedded in the continuous phase and the alkylcarboxyl-substituted polyolefin is present between the layers and adheres the layers together.
Claim 2
Dependent Claim
82 words
A laminar, shaped, article comprising a combination of polyolefin, a condensation polymer incompatible with the polyolefin, and an alkylcarboxyl-subsituted polyolefin wherein the polyolefin is present in the article as a continuous matrix phase and the condensation polymer is present in the article, as a discontinuous distributed phase in the form of a multitude of thin, substantially two-dimensional, parallel and overlapping layers of material embedded in the continuous phase and the alkylcarboxyl-substituted polyolefin is present between the layers and adheres the layers together.
Claim 3
Dependent Claim
23 words
The article of claim 1 wherein the polyolefin is selected from the group consisting of polyethylene, polypropylene, polybutylene, and copolymers of those materials.
Claim 4
Dependent Claim
19 words
The article of claim 1 wherein the condensation polymer is selected from the group consisting of polyamides and polyesters.
Claim 5
Dependent Claim
33 words
The article of claim 1 wherein the alkylcarboxyl-substituted polyolefin is selected from the group consisting of polyolefins which have carboxylic moieties attached thereto, either on the polyolefin backbone itself or on side chains.
Claim 6
Dependent Claim
12 words
The article of claim 1 wherein the condensation polymer is a polyamide.
Claim 7
Dependent Claim
30 words
The article of claim 5 wherein the polyamide is a discontinuous phase and is present in layers of material more than about 0.5 and less than about 50 micrometers thick.
Claim 8
Dependent Claim
12 words
The article of claim 1 wherein the condensation polymer is a polyester.
Claim 9
Dependent Claim
30 words
The article of claim 7 wherein the polyester is a discontinuous phase and is present in layers of material more than about 0.5 and less than about 50 micrometers thick.
Claim 10
Dependent Claim
41 words
The article of claim 1 wherein the condensation polymer is present in about 5 to 40 weight percent, the polyolefin is about 60 to 95 weight percent, and the alkylcarboxyl-substituted polyolefin is about 0.5 to 5 weight percent, of the article.
Claim 11
Dependent Claim
11 words
The article of claim 1 in the shape of a film.
Claim 12
Dependent Claim
11 words
The article of claim 1 in the shape of a filament.
Claim 13
Dependent Claim
11 words
The article of claim 1 in the shape of a container.
Claim 14
Dependent Claim
10 words
The article of claim 1 in the shape of tubing.
Claim 15
Dependent Claim
11 words
The article of claim 1 in the shape of a sheet.
Claim 16
Dependent Claim
41 words
The article of claim 1 wherein the condensation polymer is present in about 10 to 30 weight percent, the polyolefin is about 70 to 90 weight percent, and the alkyl-carboxyl-substituted polyolefin is about 0.5 to 5 weight percent, of the article.
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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) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |