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US4012360A
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Bis-salicyloyl-dicarboxylic acid dihydrazides as stabilizers for polyolefines
Assignee: Novartis Corp
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Filing: 1975-08-06
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Granted: 1977-03-15
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Expires: 1995-08-06
Abstract
Abstract New bis-salicyloyl-dicarboxylic acid dihydrazides are stabilizers for polyolefines. They are prepared by reacting a salicylic acid hydrazide with a dicarboxylic acid chloride or a dicarboxylic acid diester.
Inventors
- 👤 Kurt Schwarzenbach
- 👤 Helmut Mueller
- 👤 Siegfried Rosenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:42
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/22; C08K5/24; C08K5/25; C07; C07C; C07C243/00; C07C243/24; C07C243/38
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
93 words
A compound of the formula ##STR29##wherein X denotes a direct bond, alkylene of 1 to 8 carbon atoms, m-phenylene or p-phenylene; n denotes 0 or 1; and the rings A are each unsubstituted, or one or both rings A are substituted with an hydroxyl, a chlorine atom, an α-methylbenzyl, an alkanoyloxy of 2 to 18 carbon atoms or an alkanoylamino of 2 to 18 carbon atoms; or with one or two alkyl groups each of 1 to 8 carbon atoms, or one or two alkoxy groups each of 1 to 18 carbon atoms.
Claim 2
Dependent Claim
93 words
A compound of the formula ##STR29##wherein X denotes a direct bond, alkylene of 1 to 8 carbon atoms, m-phenylene or p-phenylene; n denotes 0 or 1; and the rings A are each unsubstituted, or one or both rings A are substituted with an hydroxyl, a chlorine atom, an α-methylbenzyl, an alkanoyloxy of 2 to 18 carbon atoms or an alkanoylamino of 2 to 18 carbon atoms; or with one or two alkyl groups each of 1 to 8 carbon atoms, or one or two alkoxy groups each of 1 to 18 carbon atoms.
Claim 3
Dependent Claim
63 words
A compound according to claim 1, characterised in that X denotes a direct bond, alkylene with 3 to 8 carbon atoms, m-phenylene or p-phenylene; n denotes 0 or 1; and the rings A are unsubstituted or are each substituted by 1 or 2 alkyl groups with 1 to 8 carbon atoms, an alkoxy with 1 to 18 carbon atoms or a chlorine atom.
Claim 4
Dependent Claim
29 words
A compound according to claim 1, characterised in that X denotes alkylene with 3 to 8 carbon atoms; n denotes 0 or 1; and the rings A are unsubstituted.
Claim 5
Dependent Claim
45 words
A compound according to claim 1 characterised in that X denotes a direct bond; n denotes 1; and the rings A are each substituted by 1 or 2 alkyl groups with 1 to 8 carbon atoms or an alkoxy with 1 to 8 carbon atoms.
Claim 6
Dependent Claim
55 words
A compound according to claim 1, characterised in that X denotes a direct bond, alkylene with 3 to 8 carbon atoms, m-phenylene or p-phenylene; n denotes 1; and the rings A are each substituted by 1 or 2 alkyl groups with 4 to 8 carbon atoms or an alkoxy with 1 to 18 carbon atoms.
Claim 7
Dependent Claim
22 words
A composition comprising a polyolefin and from 0.01 to 5% by weight of the polyolefin of a stabilizing compound of claim 1.
Claim 8
Dependent Claim
15 words
A composition comprising a polyolefin of an α-olefin polymer and a compound of claim 1.
Claim 9
Dependent Claim
10 words
A composition comprising polyethylene and a compound of claim 1.
Claim 10
Dependent Claim
10 words
A composition comprising polypropylene and a compound of claim 1.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |