US3976621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photodegradable copolymers of ethylene and vinyl alcohol containing ketoether groups
Assignee: Anic SpA
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Filing: 1974-10-24
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Granted: 1976-08-24
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Expires: 1994-10-24
Abstract
Abstract A copolymer of ethylene and vinyl alcohol which contains ketoether groups and is photodegradable under the direct action of sunlight is prepared by reacting an ethylene-vinyl alcohol copolymer with alpha-diazoacetophenone in the presence of an organic solvent and a catalyst consisting of a Lewis acid.
Inventors
- 👤 Nicola Palladino
- 👤 Marcello Mazzei
- 👤 Paolo Bacchin
- 👤 Walter Marconi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:14
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; Y; Y10; Y10S; Y10S260/00; Y10S260/43; Y10S526/00; Y10S526/914
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
51 words
A process of rendering a copolymer of ethylene and vinyl alcohol degradable under the direct action of sunlight which consists in reacting said ethylene-vinyl alcohol copolymer with alpha-diazoacetophenone or para-chloro-alpha-diazoacetophenone in the presence of an organic solvent and a catalyst consisting of a Lewis acid in the temperature range of 20°-90°C.
Claim 2
Dependent Claim
51 words
A process of rendering a copolymer of ethylene and vinyl alcohol degradable under the direct action of sunlight which consists in reacting said ethylene-vinyl alcohol copolymer with alpha-diazoacetophenone or para-chloro-alpha-diazoacetophenone in the presence of an organic solvent and a catalyst consisting of a Lewis acid in the temperature range of 20°-90°C.
Claim 3
Dependent Claim
9 words
The product produced by the process of claim 1.
Claim 4
Dependent Claim
34 words
A process of rendering degradable under the action of sunlight a polymer of ethylene or propylene which is adapted for use in packaging, which comprises blending with said polymer the product of claim 2.
Claim 5
Dependent Claim
30 words
Polymeric material adapted for use in packaging and degradable under the action of sunlight comprising a blend of a polymer of ethylene or propylene and the product of claim 2.
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) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |