US3933735A
Expired / Lapsed
US
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4-Piperidone derivatives, their preparation and their use as stabilizers
Assignee: Sankyo Co Ltd
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Filing: 1974-05-15
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Granted: 1976-01-20
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Expires: 1994-05-15
Abstract
Abstract 4-Piperidone derivatives having the formulae ##SPC1## Wherein R represents a phenyl or naphthyl group which may be substituted with nitro, lower alkyl, halogen, hydroxyl, lower alkyl hydroxy, hydroxy lower alkyl or formyl or a 5- or 6-membered heterocyclic group having as a hetero atom at least one of oxygen atom, sulfur atom and nitrogen atom and R 1 represents hydrogen atom or an alkyl group of 1 to 4 carbon atoms. They are useful as stabilizers for various synthetic polymers against their photo- and thermal-deteriorations and the 4-piperidone derivatives (II) are prepared from the corresponding 2,2,6,6-tetramethyl-4-oxopiperidine derivatives by reaction with an aldehyde and the 4-piperidone derivatives (I) are prepared from the 4-piperidone derivatives (II) through dehydration.
Inventors
- 👤 Keisuke Murayama
- 👤 Susumu Higashida
- 👤 Katsuaki Matsui
- 👤 Tomoyuki Kurumada
- 👤 Noriyuki Ohta
- 👤 Hisayu Ohsawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:32
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
104 words
A synthetic polymer composition stabilized against photo- and thermal-deterioration wherein there is incorporated, in a sufficient amount to prevent said deterioration, a compound selected from the group consisting of the 4-piperidone derivatives having the formulae ##SPC4## ##SPC5## wherein R represents a phenyl or naphthyl group which may be substituted with nitro, lower alkyl, halogen, hydroxy, lower alkyl hydroxy, hydroxy lower alkyl or formyl or a 5-- or 6-- membered heterocyclic group having as a hetero atom a member selected from the group consisting of oxygen, sulfur and nitrogen and R 1 represents hydrogen atom or an alkyl group of 1 to 4 carbon atoms.
Claim 2
Dependent Claim
104 words
A synthetic polymer composition stabilized against photo- and thermal-deterioration wherein there is incorporated, in a sufficient amount to prevent said deterioration, a compound selected from the group consisting of the 4-piperidone derivatives having the formulae ##SPC4## ##SPC5## wherein R represents a phenyl or naphthyl group which may be substituted with nitro, lower alkyl, halogen, hydroxy, lower alkyl hydroxy, hydroxy lower alkyl or formyl or a 5-- or 6-- membered heterocyclic group having as a hetero atom a member selected from the group consisting of oxygen, sulfur and nitrogen and R 1 represents hydrogen atom or an alkyl group of 1 to 4 carbon atoms.
Claim 3
Dependent Claim
31 words
The synthetic polymer composition according to claim 1 wherein said 4-piperidone derivative is incorporated in an amount of 0.01 - 5.0% by weight, based upon the amount of the synthetic polymer.
Claim 4
Dependent Claim
14 words
The synethic polymer composition according to claim 1 wherein said polymer is a polyolefin.
Claim 5
Dependent Claim
15 words
The synthetic polymer composition according to claim 1 wherein said polymer is a polyvinyl chloride.
Claim 6
Dependent Claim
14 words
The synthetic polymer composition according to claim 1 wherein said polymer is a polyurethane.
Claim 7
Dependent Claim
14 words
The synthetic polymer composition according to claim 1 wherein said polymer is a polyamide.
Claim 8
Dependent Claim
24 words
The synthetic polymer composition according to claim 1 wherein said 4-piperidone derivative is selected from 3-(α-hydroxybenzyl)-2,2,6,6-tetramethyl-4-oxopiperidine, 3-(α-hydroxyfurfuryl)-2,2,6,6-tetramethyl-4-oxopiperidine, 3-(α-hydroxy-p-methylbenzyl)-2,2,6,6-tetramethyl-4-oxopiperidine, 3-Z-benzylidene-2,2,6,6-tetramethyl-4-oxopiperidine, 3-E-benzylidene-2,2,6,6-tetramethyl-4-oxopiperidine, 3-Z-furfurylidene-2,2,6,6-tetramethyl-4-oxopiperidine, 3-E-furfurylidene-2,2,6,6-tetramethyl-4-oxopiperidine and 2,2,6,6-tetramethyl-3-Z-(p-methylbenzylidene)-4-oxo-piperidine.
References Cited (Backward Citations)
US2739969A
Cited
US3513170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |