US3994869A
Expired / Lapsed
US
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Photodegradable polyolefins containing aryl-substituted 1,3-diones
Assignee: Zeneca Inc
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Filing: 1975-02-18
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Granted: 1976-11-30
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Expires: 1995-02-18
Abstract
Abstract Aryl substituted 1,3-diones have been found to be useful as accelerators for the photodegradation of polyolefins.
Inventors
- 👤 John A. Gontarz
- 👤 Charles H. Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:45
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0033; C07; C07C; C07C45/00; C07C45/45; C07C45/455; C08K5/04; C08K5/07; Y; Y10; Y10S; Y10S260/00; Y10S260/43; Y10S526/00; Y10S526/914
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
114 words
A photodegradable composition comprising: a. a polyolefin, and b. an aryl substituted 1,3-dione having the following formula: ##SPC9## wherein R is selected from the group consisting of hydrogen, halogen, C 1 to C 9 alkyl, and C 1 to C 9 alkoxy, and R' is selected from the group consisting of C 1 to C 17 alkyl, cycloalkyl containing from 4 to 7 carbon atoms, and substituents represented by the following formula: ##SPC10## wherein m is an integer equal to from 1 to about 8 and R is as defined above wherein the amount of dione is equal to from about .05 to 1.0% by weight based on the total weight of said composition.
Claim 2
Dependent Claim
114 words
A photodegradable composition comprising: a. a polyolefin, and b. an aryl substituted 1,3-dione having the following formula: ##SPC9## wherein R is selected from the group consisting of hydrogen, halogen, C 1 to C 9 alkyl, and C 1 to C 9 alkoxy, and R' is selected from the group consisting of C 1 to C 17 alkyl, cycloalkyl containing from 4 to 7 carbon atoms, and substituents represented by the following formula: ##SPC10## wherein m is an integer equal to from 1 to about 8 and R is as defined above wherein the amount of dione is equal to from about .05 to 1.0% by weight based on the total weight of said composition.
Claim 3
Dependent Claim
12 words
A composition, as claimed in claim 1, wherein the polyolefin is polyethylene.
Claim 4
Dependent Claim
15 words
A composition, as claimed in claim 1, wherein the dione has the following formula: ##SPC11##
Claim 5
Dependent Claim
9 words
A film prepared from the composition of claim 1.
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) | 1979-11-30 | 1980-05-31 | 1980-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-30 | 1984-05-31 | 1984-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-30 | 1988-05-31 | 1988-11-30 | $7700.00 | Window Closed / Lapsed |