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US3893972A
Expired / Lapsed
US
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Acyl hydrazones of 2,2,6,6-tetramethylpiperidine-4-ones
Assignee: Novartis Corp
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Filing: 1974-01-25
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Granted: 1975-07-08
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Expires: 1994-01-25
Abstract
Abstract Acyl hydrazone derivatives of 2,2,6,6-tetramethylpiperidine-4one are stabilizers of organic materials. They are prepared by reacting a corresponding acid hydrazide with triacetonamine.
Inventors
- 👤 Brian Holt
- 👤 Donald Richard Randell
- 👤 James Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:03
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
19 words
A COMPOSITION COMPRISING AN ORGANIC MATERIAL AND FROM 0.01 TO 5% BY WEIGHT OF A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
19 words
A COMPOSITION COMPRISING AN ORGANIC MATERIAL AND FROM 0.01 TO 5% BY WEIGHT OF A COMPOUND HAVING THE FORMULA
Claim 3
Dependent Claim
14 words
A composition as claimed in claim 1, wherein the organic material is a polyolefine.
Claim 4
Dependent Claim
17 words
A composition as claimed in claim 2, wherein the polyolefine is low- or high-density polyethylene or polypropylene.
Claim 5
Dependent Claim
12 words
A composition as claimed in claim 2, wherein the polyolefine is polystyrene.
Claim 6
Dependent Claim
29 words
A composition of claim 2 wherein R is alkyl of 1 to 12 carbon atoms and the alkyl chain is uninterrupted or interrupted by one or more sulphur atom.
Claim 7
Dependent Claim
8 words
A composition of claim 2 wherein R is
Claim 8
Dependent Claim
13 words
A composition of claim 1 wherein the stabilizer is di-(2,2,6, 6-tetramethylpiperidinyl-4) thiopropionyl di-hydrazone.
Claim 9
Dependent Claim
11 words
A composition of claim 1 wherein the stabilizer is 2,2,6,6-tetramethyl-4-heptanoyl hydrazone.
Claim 10
Dependent Claim
11 words
A composition of claim 1 wherein the stabilizer is 2,2,6,6-tetramethylpiperidinyl-4-lauroyl hydrazone.
Claim 11
Dependent Claim
13 words
A composition of claim 1 wherein the stabilizer is di-(2,2, 6,6-tetramethylpiperidinyl-4) sebacoyl di-hydrazone.
Claim 12
Dependent Claim
11 words
A composition of claim 1 wherein the stabilizer is di-(2,2, 6,6-tetramethylpiperidinyl-4)adipoyl-di-hydrazone.
Claim 13
Dependent Claim
35 words
A composition as claimed in claim 1, wherein the proportion of the compound of formula I is within the range of from 0.01% to 5% by weight based on the weight of untreated organic material.
Claim 14
Dependent Claim
35 words
A composition as claimed in claim 12, wherein the proportion of the compound of formula I is within the range of from 0.1% to 2% by weight based on the weight of untreated organic material.
Claim 15
Dependent Claim
35 words
A composition as claimed in claim 1, wherein an antioxidant, a further light stabiliser, a metal complexant/deactivator, a pigment, an anti-slipping or anti-static agent, a filler, a dye or glass or other fibres are present.
References Cited (Backward Citations)
US3745163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |