US4207221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Degradable plastic composition containing unsaturated wax
Assignee: Graham Packaging Plastic Products Inc
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Filing: 1977-12-27
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Granted: 1980-06-10
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Expires: 1997-12-27
Abstract
Abstract There is disclosed an environmentally degradable plastic composition comprising an organic polymeric material having dispersed therein at least one unsaturated wax as a readily autoxidizable organic substance.
Inventors
- 👤 John W. Tobias
- 👤 Lynn J. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:09
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L57/00; C08L91/00; C08L91/06; C08L2207/00; C08L2207/06; C08L2207/066; Y; Y10; Y10S; Y10S260/00; Y10S260/43; Y10S525/00; Y10S525/938
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
28 words
As a composition of matter, an environmentally degradable plastic composition comprising a polyolefin having dispersed therein at least one unsaturated wax material as a readily autoxidizable organic substance.
Claim 2
Dependent Claim
28 words
As a composition of matter, an environmentally degradable plastic composition comprising a polyolefin having dispersed therein at least one unsaturated wax material as a readily autoxidizable organic substance.
Claim 3
Dependent Claim
31 words
The invention of claim 1 wherein the degradable plastic composition comprises 50 to 99.9% by weight of the polyolefin and 50 to 0.1% by weight of the autoxidizable unsaturated wax material.
Claim 4
Dependent Claim
26 words
The invention of claim 1 wherein the degradable plastic composition comprises 99 to 95% by weight low-density polyethylene and 1 to 5% by weight candelilla wax.
Claim 5
Dependent Claim
24 words
The invention of claim 1 wherein the plastic composition also contains 0.001 to 0.05% by weight antioxidant based on the weight of the polyolefin.
Claim 6
Dependent Claim
24 words
The invention of claim 3 wherein the plastic composition also contains 0.001 to 0.05% by weight antioxidant based on the weight of the polyethylene.
Claim 7
Dependent Claim
10 words
The invention of claim 5 wherein the antioxidant is tetrakis[methylene(3,5-di-tert-butyl-4-hydroxyhydrocinnamate)]methane.
Claim 8
Dependent Claim
15 words
The invention of claim 1 wherein the degradable plastic composition also contains a blowing agent.
Claim 9
Dependent Claim
12 words
The invention of claim 1 wherein the polyolefin is a hydrocarbon polymer.
Claim 10
Dependent Claim
17 words
The invention of claim 8 wherein the hydrocarbon polymer is selected from polyethylene, polypropylene, poly(4-methyl-1-pentene) and polystyrene.
Claim 11
Dependent Claim
20 words
As an article of manufacture, a plastic body of predetermined form and comprising the composition of matter of claim 1.
Claim 12
Dependent Claim
28 words
The invention of claim 10 wherrein the plastic body comprises 50 to 99.9% by weight of the polyolefin and 50 to 0.1% by weight of the unsaturated wax.
Claim 13
Dependent Claim
25 words
The invention of claim 10 wherein the plastic body comprises 99 to 95% by weight low-density polyethylene and 1 to 5% by weight candelilla wax.
Claim 14
Dependent Claim
17 words
The invention of claim 10 wherein the article is a plastic secondary wrap for a container package.
Claim 15
Dependent Claim
16 words
The invention of claim 10 wherein the article is of a foamed or cellular plastic body.
Claim 16
Dependent Claim
12 words
The invention of claim 10 wherein the polyolefin is a hydrocarbon polymer.
Claim 17
Dependent Claim
17 words
The invention of claim 10 wherein the hydrocarbon polymer is selected from polyethylene, polypropylene, poly(4-methyl-1-pentene), and polystyrene.
Claim 18
Dependent Claim
51 words
A process for preparing an environmentally degradable plastic composition which comprises preparing a composition comprising a polyolefin having dispersed therein at least one unsaturated wax as a readily autoxidizable material and subsequently subjecting the prepared composition in the form of an article to an oxidizing environment to partially oxidize said composition.
Claim 19
Dependent Claim
51 words
A process for preparing an environmentally degradable plastic composition which comprises preparing a composition comprising a polyolefin having dispersed therein at least one unsaturated wax as a readily autoxidizable material and subsequently subjecting the prepared composition in the form of an article to an oxidizing environment to partially oxidize said composition.
Claim 20
Dependent Claim
24 words
The invention of claim 17 wherein 50 to 0.1% by weight of said autoxidizable unsaturated is dispersed in 50 to 99.9% of said polyolefin.
Claim 21
Dependent Claim
24 words
The invention of claim 17 wherein 1 to 5% by weight candelilla wax is dispersed in 99 to 95% by weight of low-density polyethylene.
Claim 22
Dependent Claim
24 words
The invention of claim 17 wherein 0.001 to 0.05% by weight antioxidant based on the weight of said polyolefin is incorporated in said composition.
Claim 23
Dependent Claim
25 words
The invention of claim 19 wherein 0.001 to 0.05% by weight antioxidant based on the weight of said low-density polyethylene is incorporated in said composition.
Claim 24
Dependent Claim
10 words
The invention of claim 21 wherein said antioxidant is tetrakis[methylene(3,5-di-tert-butyl-4-hydroxyhydrocinnamate)]methane.
Claim 25
Dependent Claim
14 words
The invention of claim 17 wherein a blowing agent is incorporated in said composition.
Claim 26
Dependent Claim
21 words
The invention of claim 17 wherein said hydrocarbon polymer is selected from the group consisting of polyethylene, polypropylene, poly(4-methyl-1-petene) and polystyrene.
Claim 27
Dependent Claim
41 words
A process for accelerating environmental degradation of an organic polymeric material comprising dispersing at least one unsaturated wax as a readily autoxidizable material in said organic polymeric material to form a composition and subsequently exposing said composition to the natural environment.
Claim 28
Dependent Claim
41 words
A process for accelerating environmental degradation of an organic polymeric material comprising dispersing at least one unsaturated wax as a readily autoxidizable material in said organic polymeric material to form a composition and subsequently exposing said composition to the natural environment.
Claim 29
Dependent Claim
13 words
The invention of claim 25 wherein said organic polymeric material is a polyolefin.
Claim 30
Dependent Claim
40 words
The invention of claim 26 comprising the further steps of forming said composition into an article of predetermined form and partially oxidizing said composition of said article in an oxidizing environment prior to exposing said composition to the natural environment.
Claim 31
Dependent Claim
24 words
The invention of claim 26 wherein 50 to 0.1% of said unsaturated wax is dispersed in 50 to 99.9% by weight of said polyolefin.
Claim 32
Dependent Claim
25 words
The invention of claim 26 wherein 1 to 5% by weight of candelilla wax is dispersed in 99 to 95% by weight of low-density polyethylene.
Claim 33
Dependent Claim
24 words
The invention of claim 26 wherein 0.001 to 0.05% by weight antioxidant based on the weight of said polyolefin is incorporated in said composition.
Claim 34
Dependent Claim
25 words
The invention of claim 29 wherein 0.001 to 0.05% by weight antioxidant based on the weight of said low-density polyethylene is incorporated in said composition.
Claim 35
Dependent Claim
10 words
The invention of claim 31 wherein said antioxidant is tetrakis[methane(3,5-di-tert-butyl-4-hydroxyhydrocinnamate)]methane.
Claim 36
Dependent Claim
20 words
The invention of claim 26 wherein said polyolefin is selected from the group consisting of polyethylene, polypropylene, poly(4-methyl-1-pentene) and polystyrene.
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) | 1983-06-10 | 1983-12-10 | 1984-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-10 | 1987-12-10 | 1988-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-10 | 1991-12-10 | 1992-06-10 | $7700.00 | Window Closed / Lapsed |