Patent US4058502A successfully refreshed from Google Patents.
US4058502A
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Stabilized compositions containing hindered hydroxyalkanoates
Assignee: Novartis Corp
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Filing: 1976-06-07
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Granted: 1977-11-15
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Expires: 1996-06-07
Abstract
Abstract The compounds are esters having the formula ##STR1## wherein R 1 is alkyl, cycloalkyl, alkylthioethyl or alkylpolyoxyalkylene, Z is oxygen or sulfur, R 2 is the group ##STR2## R 3 is hydrogen, alkyl, cycloalkyl, or α-methylbenzyl, R 4 is alkyl or cycloalkyl, R 5 is hydrogen or alkyl, provided when R 3 is hydrogen, R 5 is alkyl and R 4 is located on the carbon atom ortho to the hydroxyl group, and A is a covalent carbon bond or lower alkylene.
Inventors
- 👤 Martin Dexter
- 👤 David Herbert Steinberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:26
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07C; C07C323/00; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/134; C08K5/1345; C08K5/36; C08K5/37; C08K5/375; C09; C09K; C09K15/00; C09K15/04; C09K15/06; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/287; C10M2207/289; C10M2207/34; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/084; C10M2221/00; C10M2221/04; C10M2221/043; C10N; C10N2040/00; C10N2040/20; C10N2040/22; C10N2040/46
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
191 words
A composition of matter comprising an organic material subject to degradation and from 0.01 to 5% by weight of a stabilizing compound of the formula ##STR15## wherein R 1 is alkyl of 1 to 30 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, alkylthioethyl of 4 to 27 atoms in the chain or alkylpolyoxyalkylene of 4 to 27 atoms in the chain, Z is oxygen or sulfur, R 2 is the group ##STR16## R 3 is hydrogen, alkyl of 1 to 8 carbon atoms, cycloalkyl of 5 to 6 carbon atoms or α-methylbenzyl, R 4 is alkyl of 1 to 8 carbon atoms or cycloalkyl of 5 to 6 carbon atoms, R 5 is hydrogen or lower alkyl of 1 to 4 carbon atoms, or R 3 and R 5 together form a butylene chain which, together with the phenyl ring, form a tetrahydronaphthyl group, and provided when R 3 is hydrogen, R 5 is alkyl and R 4 is located on the carbon atom ortho to the hydroxyl group, and A is a covalent carbon bond or a straight or branched lower alkylene having 1 to 8 carbon atoms.
Claim 2
Dependent Claim
191 words
A composition of matter comprising an organic material subject to degradation and from 0.01 to 5% by weight of a stabilizing compound of the formula ##STR15## wherein R 1 is alkyl of 1 to 30 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, alkylthioethyl of 4 to 27 atoms in the chain or alkylpolyoxyalkylene of 4 to 27 atoms in the chain, Z is oxygen or sulfur, R 2 is the group ##STR16## R 3 is hydrogen, alkyl of 1 to 8 carbon atoms, cycloalkyl of 5 to 6 carbon atoms or α-methylbenzyl, R 4 is alkyl of 1 to 8 carbon atoms or cycloalkyl of 5 to 6 carbon atoms, R 5 is hydrogen or lower alkyl of 1 to 4 carbon atoms, or R 3 and R 5 together form a butylene chain which, together with the phenyl ring, form a tetrahydronaphthyl group, and provided when R 3 is hydrogen, R 5 is alkyl and R 4 is located on the carbon atom ortho to the hydroxyl group, and A is a covalent carbon bond or a straight or branched lower alkylene having 1 to 8 carbon atoms.
Claim 3
Dependent Claim
78 words
A composition according to claim 1 where in the stabilizing compound R 1 is alkyl of 1 to 18 carbon atoms, Z is oxygen or sulfur, R 2 is the group ##STR17## R 3 is alkyl of 1 to 4 carbon atoms, R 4 is branched alkyl of 3 to 8 carbon atoms, R 5 is hydrogen or alkyl of 1 to 3 carbon atoms, and A is a straight chain alkylene of 1 to 3 carbon atoms.
Claim 4
Dependent Claim
54 words
A composition according to claim 1 where in the stabilizing compound R 1 is alkyl of 8 to 18 carbon atoms, Z is oxygen or sulfur, R 2 is the group ##STR18## R 3 is methyl or tert-butyl, R 4 is tert-butyl, R 5 is hydrogen or methyl, and A is methylene or ethylene.
Claim 5
Dependent Claim
11 words
A composition of claim 1 wherein the stabilizing compound is 1-n-octadecyloxy-2,3-bis(3-methyl-5-tert-butyl-4-hydroxyhydrocinnamoyloxy)propane.
Claim 6
Dependent Claim
11 words
A composition of claim 1 wherein the stabilizing compound is 1-n-oxtadecylthio-2,3-bis(3-methyl-5-tert-butyl-4-hydroxyhydrocinnamoyloxy)propane.
Claim 7
Dependent Claim
11 words
A composition of claim 1 wherein the stabilizing compound is 1-n-octadecylthio-2,3-bis(3,5-di-tert-butyl-4-hydroxyhydrocinnamoyloxy)propane.
Claim 8
Dependent Claim
11 words
A composition of claim 1 wherein the stabilizing compound is 1-n-octadecyloxy-2,3-bis(3,5-di-tert-butyl-4-hydroxyhydrocinnamoyloxy)propane.
Claim 9
Dependent Claim
37 words
A composition of claim 1 containing additionally from 0 to 2% by weight of a thio co-stabilizer having the formula ##STR19## wherein R is alkyl of 6 to 24 carbon atoms and n is 1 to 6.
Claim 10
Dependent Claim
17 words
A composition of claim 1 containing additionally from 0 to 5% by weight of a light stabilizer.
Claim 11
Dependent Claim
11 words
A composition of claim 1 wherein the stabilizing compound is 1-n-dodecylthio-2,3-bis(3-methyl-5-tert-butyl-4-hydroxyhydrocinnamoyloxy)propane.
Claim 12
Dependent Claim
11 words
A composition of claim 1 wherein the organic material is polyolefin.
Claim 13
Dependent Claim
11 words
A composition of claim 11 wherein the organic material is polypropylene.
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) | 1980-11-14 | 1981-05-16 | 1981-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-14 | 1985-05-16 | 1985-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-14 | 1989-05-16 | 1989-11-15 | $7700.00 | Window Closed / Lapsed |