Patent US4191320A successfully refreshed from Google Patents.
US4191320A
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Degradable article
Assignee: OI Glass Inc
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Filing: 1977-09-27
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Granted: 1980-03-04
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Expires: 1997-09-27
Abstract
Abstract There is disclosed a degradable article made from photodegradable polymeric or plastic compositions comprising at least one organic polymer or copolymer and at least two different aromatic carbonyl photosensitizers.
Inventors
- 👤 Lynn J. Taylor
- 👤 John W. Tobias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:47
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/06; C08J7/065; C08K; C08K5/00; C08K5/0008; C08K5/0033; Y; Y10; Y10S; Y10S220/00; Y10S220/30; Y10S260/00; Y10S260/43; Y10S522/00; Y10S522/913; Y10S526/00; Y10S526/914; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
78 words
As an article of manufacture, a photodegradable polymeric container package comprised of at least one thermoplastic organic polymer and at least two aromatic carbonyl photosensitizers present in amounts sufficient to accelerate the photodegradation of the resulting polymeric composition, at least one aromatic carbonyl photosensitizer having an ultraviolet absorption maximum in the range of 280 to 330 millimicrons and at least one other aromatic carbonyl photosensitizer having an ultraviolet absorption maximum in the range of 330 to 400 millimicrons.
Claim 2
Dependent Claim
78 words
As an article of manufacture, a photodegradable polymeric container package comprised of at least one thermoplastic organic polymer and at least two aromatic carbonyl photosensitizers present in amounts sufficient to accelerate the photodegradation of the resulting polymeric composition, at least one aromatic carbonyl photosensitizer having an ultraviolet absorption maximum in the range of 280 to 330 millimicrons and at least one other aromatic carbonyl photosensitizer having an ultraviolet absorption maximum in the range of 330 to 400 millimicrons.
Claim 3
Dependent Claim
24 words
The article of claim 1 wherein each of said aromatic carbonyl photosensitizers is present at a level of 0.01 to 2.0 percent by weight.
Claim 4
Dependent Claim
23 words
The article of claim 2 wherein the thermoplastic organic polymer is selected from the group consisting of polyethylene, polypropylene, poly(1-butene), and poly(vinyl chloride).
Claim 5
Dependent Claim
31 words
The article of claim 2 wherein each aromatic carbonyl photosensitizer is selected from the group consisting of aromatic ketones, aromatic diketones, aromatic aldehydes, and quinones possessing at least one aromatic ring.
Claim 6
Dependent Claim
56 words
The article of claim 4 wherein two aromatic carbonyl photosensitizers are employed, one being selected from the group consisting of acetophenone, anthraquinone, 2-tertbutylanthraquinone 1-chloroanthraquinone, 2-chloroanthraquinone, 2-ethylanthraquinone, 1-methylanthraquinone, 2-methylanthraquinone, benzalacetone, benzanthrone, butyrophenone, chalcone, p-chloroacetophenone, flavone, and alpha tetralone, and the other being selected from the group consisting of anthracene-9-carboxaldehyde, benzophenone, benzil, 4,4'-bis(dimethylamino)-benzophenone, p-dimethylaminoacetophenone, 2,5-dimethylbenzophenone, and di-o-tolyl ketone.
Claim 7
Dependent Claim
12 words
The article of claim 4 wherein two aromatic carbonyl photosensitizers are employed.
Claim 8
Dependent Claim
91 words
A process for preparing a degradable polymeric article of manufacture, which process comprises dispersing into a thermoplastic organic polymer at least two aromatic carbonyl photosensitizers in amounts sufficient to accelerate the photodegradation of the resulting polymeric composition, at least one aromatic carbonyl photosensitizer having an ultraviolet absorption maximum in the range of 280 to 330 millimicrons and at least one other aromatic carbonyl photosensitizer having an ultraviolet absorption maximum in the range of 330 to 400 millimicrons, and then shaping the polymer into an article of manufacture at an elevated temperature.
Claim 9
Dependent Claim
91 words
A process for preparing a degradable polymeric article of manufacture, which process comprises dispersing into a thermoplastic organic polymer at least two aromatic carbonyl photosensitizers in amounts sufficient to accelerate the photodegradation of the resulting polymeric composition, at least one aromatic carbonyl photosensitizer having an ultraviolet absorption maximum in the range of 280 to 330 millimicrons and at least one other aromatic carbonyl photosensitizer having an ultraviolet absorption maximum in the range of 330 to 400 millimicrons, and then shaping the polymer into an article of manufacture at an elevated temperature.
Claim 10
Dependent Claim
30 words
The process of claim 7 wherein the amount of each aromatic carbonyl photosensitizer dispersed in said thermoplastic organic polymer is in the range of 0.01 to 2.0 percent by weight.
Claim 11
Dependent Claim
23 words
The process of claim 8 wherein the thermoplastic organic polymer is selected from the group consisting of polyethylene, polypropylene, poly(1-butene), and poly(vinyl chloride).
Claim 12
Dependent Claim
31 words
The process of claim 8 wherein each aromatic carbonyl sensitizer is selected from the group consisting of aromatic ketones, aromatic diketones, aromatic aldehydes, and quinones possessing at least one aromatic ring.
Claim 13
Dependent Claim
56 words
The process of claim 10 wherein two aromatic carbonyl photosensitizers are employed, one being selected from the group consisting of acetophenone, anthraquinone, 2-tertbutylanthraquinone, 1-chloroanthraquinone, 2-chloroanthraquinone, 2-ethylanthraquinone, 1-methylanthraquinone, 2-methylanthraquinone, benzalacetone, benzanthrone, butyrophenone, chalcone, p-chloroacetophenone, flavone, and alpha tetralone, and the other being selected from the group consisting of anthracene-9-carboxaldehyde, benzophenone, benzil, 4,4'-bis(dimethylamine)-benzophenone, p-dimethylamineacetophenone, 2,5-dimethylbenzophenone, and di-o-tolyl ketone.
Claim 14
Dependent Claim
12 words
The process of claim 10 wherein two aromatic carbonyl photosensitizers are employed.
Claim 15
Dependent Claim
31 words
The process of claim 8 wherein the thermoplastic organic polymer is melted at a temperature below its decomposition temperature and the aromatic carbonyl photosensitizers are subsequently incorporated into the molten polymer.
Claim 16
Dependent Claim
25 words
The process of claim 8 wherein the polymer and the aromatic carbonyl photosensitizers are blended at ambient temperature and the resulting mixture is subsequently melted.
Claim 17
Dependent Claim
17 words
The process of claim 8 wherein the degradable composition is subsequently shaped by extrusion at elevated temperature.
Claim 18
Dependent Claim
17 words
The process of claim 8 wherein the degradable composition is subsequently shaped by molding at elevated temperature.
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) | 1983-03-04 | 1983-09-03 | 1984-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-04 | 1987-09-03 | 1988-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-04 | 1991-09-03 | 1992-03-04 | $7700.00 | Window Closed / Lapsed |