US3884874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diacyl-hydrazine stabilizers for polyolefins
Assignee: Novartis Corp
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Filing: 1972-11-16
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Granted: 1975-05-20
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Expires: 1992-11-16
Abstract
Abstract Disclosed are process for stabilising polyolefines with compounds of formula 1, use of compounds of formula 1 for stabilising polyolefines and stabilising compositions, comprising; A. A POLYOLEFINE; AND B. COMPOUNDS OF THE FORMULA
Inventors
- 👤 Siegfried Rosenberger
- 👤 Andreas Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:42
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/22; C08K5/24; C08K5/25
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
30 words
A COMPOSITION OF MATTER STABLISED AGAINST THERMOOXIDATIVE DEGRADATION AND DISCOLORATION WHICH COMPRISES A POLYOLEFIN AND A. FROM 0.01 TO 5 PERCENT BY WEIGHT OF A COMPOUND A OF THE FORMULA
Claim 2
Dependent Claim
30 words
A COMPOSITION OF MATTER STABLISED AGAINST THERMOOXIDATIVE DEGRADATION AND DISCOLORATION WHICH COMPRISES A POLYOLEFIN AND A. FROM 0.01 TO 5 PERCENT BY WEIGHT OF A COMPOUND A OF THE FORMULA
Claim 3
Dependent Claim
93 words
A composition according to claim 1 containing compound A wherein R1 and R2 independently of one another denote a phenyl group substituted by a hydroxyl group in the m- or p-position, by one or two alkoxy groups each with 1 to 18 carbon atoms, by an acylamino group with 2 to 7 carbon atoms or by an amino group in the o-position, or where R2 also denotes alkyl with 1 to 8 carbon atoms, benzyl or phenyl if R1 represents an acylaminophenyl group with 2 to 7 carbon atoms in the acyl radical.
Claim 4
Dependent Claim
85 words
A composition according to claim 1 containing compound A wherein R1 and R2 independently of one another denote a phenyl group substituted by a hydroxyl group in the m- or p-position, by one or two alkoxy groups each with 1 to 16 carbon atoms, by an acylamino group with 2 to 7 atoms or by an amino group in the o-position, or where R2 also denotes mEthyl or phenyl if R1 represents an acylaminophenyl group with 2 to 7 carbon atoms in the acyl radical.
Claim 5
Dependent Claim
23 words
A composition according to claim 1 in which compound A is present in a concentration of from 0.05 to 1.5 percent by weight.
Claim 6
Dependent Claim
23 words
A composition according to claim 1 in which compound A is present in a concentration of from 0.1 to 0.8 percent by weight.
Claim 7
Dependent Claim
12 words
A composition according to claim 1 in which the polyolefin is polypropylene.
Claim 8
Dependent Claim
11 words
A composition according to claim 1 in which compound A is
Claim 9
Dependent Claim
11 words
A composition according to claim 1 in which compound A is
Claim 10
Dependent Claim
11 words
A composition according to claim 1 in which compound A is
Claim 11
Dependent Claim
11 words
A composition according to claim 1 in which compouund A is
Claim 12
Dependent Claim
11 words
A composition according to claim 1 in which compound A is
Claim 13
Dependent Claim
19 words
A composition according to claim 1 containing additionally from 0 to 0.1 percent by weight of a phenolic antioxidant.
Claim 14
Dependent Claim
22 words
A composition according to claim 12 containing a phenolic antioxidant selected from the group consisting of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid octadecyl ester and 1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane.
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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |