Patent US4636573A successfully refreshed from Google Patents.
US4636573A
Expired / Lapsed
US
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Hindered silicon ester stabilizers
Assignee: Novartis Corp
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Filing: 1985-09-09
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Granted: 1987-01-13
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Expires: 2005-09-09
Abstract
Abstract Compounds of the formulae I and II ##STR1## wherein R 1 , R 2 , R 3 , R 4 and R 5 are independently hydrogen, alkyl of 1 to 18 carbon atoms, cycloalkyl of 5 to 8 carbon atoms, phenyl, phenyl substituted by alkyl of 1 to 18 carbon atoms, aralkyl of 7 to 9 carbon atoms or said aralkyl substituted by alkyl of 1 to 12 carbon atoms, R 6 and R 7 are independently alkyl having 1 to 30 carbon atoms, cycloalkyl of 5 to 8 carbon atoms, phenyl, phenyl substituted by alkyl of 1 to 18 carbon atoms, aralkyl of 7 to 9 carbon atoms or said aralkyl substituted by alkyl of 1 to 12 carbon atoms; A is a direct bond, a methylene or an ethylene radical, B is an alkanediyl radical of 2 to 10 carbon atoms, the radical of formula --CH 2 CH 2 --S--CH 2 CH 2 -- or of the formula III --CH.sub.2 CH.sub.2 --(O--CH.sub.2 CH.sub.2).sub.m -- (III), wherein m is an integer from 1 to 4, B also denotes a phenylene radical or a biphenylene radical interrupted by an oxygen or a sulfur atom or by the group of formula --C(CH 3 ) 2 --; and n is an integer from 2 to 100.
Inventors
- 👤 Stephen D. Pastor
- 👤 John d. Spivack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:27
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/54; C08K5/541; C08K5/5415; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C09; C09K; C09K15/00; C09K15/04; C09K15/32; C09K15/326
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
214 words
A compound of the formulae I and II ##STR15## wherein R 1 R 2 , R 3 , R 4 and R 5 are independently hydrogen, alkyl of 1 to 18 carbon atoms cycloalkyl of 5 to 8 carbon atoms, phenyl, phenyl substituted by alkyl of 1 to 18 carbon atoms, aralkyl of 7 to 9 carbon atoms or said aralkyl substituted by alkyl of 1 to 12 carbon atoms, R 6 and R 7 are independently alkyl having 1 to 30 carbon atoms, cycloalkyl of 5 to 8 carbon atoms, phenyl, phenyl substituted by alkyl of 1 to 18 carbon atoms, aralkyl of 7 to 9 carbon atoms or said aralkyl substituted by alkyl of 1 to 12 carbon atoms; A is a direct bond, a methylene or an ethylene radical, B is an alkanediyl radical of 2 to 10 carbon atoms, the radical of formula --CH 2 CH 2 --S--CH 2 CH 2 -- or of the formula III --CH.sub.2 CH.sub.2 --(O--CH.sub.2 CH.sub.2).sub.m -- (III), wherein m is an integer from 1 to 4, B also denotes a phenylene radical or a biphenylene radical interrupted by an oxygen or a sulfur atom or by the group of formula --C(CH 3 ) 2 --; and n is an integer from 2 to 100.
Claim 2
Dependent Claim
214 words
A compound of the formulae I and II ##STR15## wherein R 1 R 2 , R 3 , R 4 and R 5 are independently hydrogen, alkyl of 1 to 18 carbon atoms cycloalkyl of 5 to 8 carbon atoms, phenyl, phenyl substituted by alkyl of 1 to 18 carbon atoms, aralkyl of 7 to 9 carbon atoms or said aralkyl substituted by alkyl of 1 to 12 carbon atoms, R 6 and R 7 are independently alkyl having 1 to 30 carbon atoms, cycloalkyl of 5 to 8 carbon atoms, phenyl, phenyl substituted by alkyl of 1 to 18 carbon atoms, aralkyl of 7 to 9 carbon atoms or said aralkyl substituted by alkyl of 1 to 12 carbon atoms; A is a direct bond, a methylene or an ethylene radical, B is an alkanediyl radical of 2 to 10 carbon atoms, the radical of formula --CH 2 CH 2 --S--CH 2 CH 2 -- or of the formula III --CH.sub.2 CH.sub.2 --(O--CH.sub.2 CH.sub.2).sub.m -- (III), wherein m is an integer from 1 to 4, B also denotes a phenylene radical or a biphenylene radical interrupted by an oxygen or a sulfur atom or by the group of formula --C(CH 3 ) 2 --; and n is an integer from 2 to 100.
Claim 3
Dependent Claim
80 words
The compound of the formulae I and II, in which R 1 and R 2 are hydrogen or alkyl of 1 to 4 carbon atoms, R 3 and R 4 are hydrogen or alkyl of 1 to 6 carbon atoms, R 5 is hydrogen, R 6 and R 7 are alkyl of 1 to 18 carbon atoms, A is a direct bond or an ethylene radical, B is a hexamethylene radical and n is a number from 2 to 10.
Claim 4
Dependent Claim
80 words
The compound of the formulae I and II, in which R 1 and R 2 are hydrogen or alkyl of 1 to 4 carbon atoms, R 3 and R 4 are hydrogen or alkyl of 1 to 6 carbon atoms, R 5 is hydrogen, R 6 and R 7 are alkyl of 1 to 18 carbon atoms, A is a direct bond or an ethylene radical, B is a hexamethylene radical and n is a number from 2 to 10.
Claim 5
Dependent Claim
73 words
The compound of the formulae I and II, in which R 1 and R 2 are hydrogen or methyl, R 3 and R 4 are tert.-butyl and are in ortho position to the phenolic oxygen atom, R 5 is hydrogen, and R 6 and R 7 are alkyl of 10 to 18 carbon atoms, A is a direct bond, B is a hexamethylene radical and n is a number from 2 to 5.
Claim 6
Dependent Claim
73 words
The compound of the formulae I and II, in which R 1 and R 2 are hydrogen or methyl, R 3 and R 4 are tert.-butyl and are in ortho position to the phenolic oxygen atom, R 5 is hydrogen, and R 6 and R 7 are alkyl of 10 to 18 carbon atoms, A is a direct bond, B is a hexamethylene radical and n is a number from 2 to 5.
Claim 7
Dependent Claim
10 words
The compound of claim 1 which corresponds to formulae I.
Claim 8
Dependent Claim
6 words
Methyl-di-(4-n-dodecyloxycarbonyl-2,6-di-tert-butyl phenoxy)-silane according to claim 4.
Claim 9
Dependent Claim
6 words
Bis (2,6-di-tert-butyl-4-n-hexyloxycarbonylphenoxy)-dimethylsilane according to claim 4.
Claim 10
Dependent Claim
6 words
Bis (2,6-di-tert-butyl-4-n-dodecyloxycarbonylphenoxy)-dimethylsilane according to claim 4.
Claim 11
Dependent Claim
6 words
Bis (2,6-di-tert-butyl-4-methoxycarbonylphenoxy)-dimethylsilane according to claim 4.
Claim 12
Dependent Claim
6 words
Bis (2,6-di-tert-butyl-4-n-octadecyloxycarbonylphenoxy)-dimethylsilane according to claim 4.
Claim 13
Dependent Claim
6 words
Dimethyl-bis{2,6,-di-tert-butyl-4-[2-(methoxycarbonyl) ethyl]-phenoxy}silane according to claim 4.
Claim 14
Dependent Claim
6 words
Dimethyl-bis{2,6,-di-tert-butyl-4-[2-(octadecyloxycarbonyl) ethyl]-phenoxy}silane according to claim 4.
Claim 15
Dependent Claim
50 words
A composition of matter comprising an organic material subject to oxidative, thermal and actinic degradation selected from the group consisting of polyolefins, styrene polymers, isoprene, natural rubber, polyesters and lubricating oils stabilized with an effective stabilizing amount of a compound of the formula I and II according to claim 1.
Claim 16
Dependent Claim
52 words
A method for stabilizing an organic material against oxidative, thermal and actinic degradation selected from the group consisting of polyolefins, styrene polymers, isoprene, natural rubber, polyesters and lubricating oils which comprises incorporating into said organic material an effective stabilizing amount of a compound of formulae I and II according to claim 1.
References Cited (Backward Citations)
US3328350A
Cited
US4176124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-12 | 1990-07-14 | 1991-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-12 | 1994-07-14 | 1995-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-12 | 1998-07-14 | 1999-01-13 | $7700.00 | Window Closed / Lapsed |