US4783495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
(Hydroxyphenyl) silane stabilizers
Assignee: BASF Corp
•
Filing: 1987-11-20
•
Granted: 1988-11-08
•
Expires: 2007-11-20
Abstract
Abstract ((Hydroxyphenyl)silane derivatives of the formula ##STR1## are effective in stabilizing organic materials against oxidative, thermal and actinic degradation, said derivatives being particularly effective as process stabilizers in organic materials containing phenolic antioxidants.
Inventors
- 👤 Stephen D. Pastor
- 👤 Edward T. Hessell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:53
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/54; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0803; C07F7/081; C07F7/0834; C07F7/0836; C07F7/0896; C07F7/12; C07F7/18; C07F7/1804; C09; C09K; C09K15/00; C09K15/04; C09K15/32; C09K15/328
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
99 words
A compound of the formula ##STR4## wherein n is an integer from 2-4; R 1 , R 2 and X are independently hydrogen, C 1 -C 18 alkyl, C 5 -C 12 cycloalkyl, phenyl, phenyl substituted by alkyl of 1 to 18 carbon atoms, C 7 -C 9 aralkyl or said aralkyl substituted by alkyl of 1 to 18 carbon atoms; and X is also halogen or hydroxy; and R 3 is hydrogen or --Si(R 4 )(R 5 )(R 6 ) with R 4 , R 5 and R 6 being independently C 1 -C 4 alkyl or phenyl.
Claim 2
Dependent Claim
99 words
A compound of the formula ##STR4## wherein n is an integer from 2-4; R 1 , R 2 and X are independently hydrogen, C 1 -C 18 alkyl, C 5 -C 12 cycloalkyl, phenyl, phenyl substituted by alkyl of 1 to 18 carbon atoms, C 7 -C 9 aralkyl or said aralkyl substituted by alkyl of 1 to 18 carbon atoms; and X is also halogen or hydroxy; and R 3 is hydrogen or --Si(R 4 )(R 5 )(R 6 ) with R 4 , R 5 and R 6 being independently C 1 -C 4 alkyl or phenyl.
Claim 3
Dependent Claim
20 words
The compound of claim 1, wherein R 1 and R 2 are alkyl of from 1 to 8 carbon atoms.
Claim 4
Dependent Claim
13 words
The compound of claim 2, wherein R 1 and R 2 are tert-butyl.
Claim 5
Dependent Claim
18 words
The compound of claim 1, wherein R 2 is in the ortho position to the OR 3 group.
Claim 6
Dependent Claim
19 words
The compound of claim 1, wherein n is 2 or 3 and X is hydrogen, hydroxy, methyl or phenyl.
Claim 7
Dependent Claim
12 words
The compound of claim 1, wherein R 3 is hydrogen or trimethylsilyl.
Claim 8
Dependent Claim
5 words
Dimethyl-bis[3,5-di-tert-butyl-4-trimethylsilyloxyphenyl]silane according to claim 1.
Claim 9
Dependent Claim
5 words
Dimethyl-bis(3,5-di-tert-butyl-4-hydroxyphenyl)silane according to claim 1.
Claim 10
Dependent Claim
5 words
Diphenyl-bis(3,5-di-tert-butyl-4-trimethylsilyloxyphenyl)silane according to claim 1.
Claim 11
Dependent Claim
5 words
Diphenyl-bis(3,5-di-tert-butyl-4-hydroxyphenyl)silane according to claim 1.
Claim 12
Dependent Claim
5 words
Methyl-bis(3,5-di-tert-butyl-4-trimethylsilyloxyphenyl)silane according to claim 1.
Claim 13
Dependent Claim
5 words
Methyl-bis(3,5-di-tert-butyl-4-hydroxyphenyl)silane according to claim 1.
Claim 14
Dependent Claim
5 words
Methyl-bis(3,5-di-tert-butyl-4-hydroxyphenyl)-fluorosilane according to claim 1.
Claim 15
Dependent Claim
5 words
Tris(3,5-di-tert-butyl-4-trimethylsilyloxyphenyl)hydroxysilane according to claim 1.
Claim 16
Dependent Claim
5 words
Tris(3,5-di-tert-butyl-4-hydroxyphenyl)hydroxysilane according to claim 1.
Claim 17
Dependent Claim
27 words
A composition of matter comprising an organic material subject to oxidative, thermal and actinic degradation stabilized with an effective stabilizing amount of a compound of claim 1.
Claim 18
Dependent Claim
13 words
The composition of claim 16, wherein the organic material is a synthetic polymer.
Claim 19
Dependent Claim
15 words
The composition of claim 17, wherein te synthetic polymer is a polyolefin homopolymer or copolymer.
Claim 20
Dependent Claim
11 words
The composition of claim 16 which also contains a phenolic antioxidant.
Claim 21
Dependent Claim
30 words
A method for stabilizing an organic material against oxidative, thermal and actinic degradation which comprises incorporating into said organic material an effective stabilizing amount of a compound of claim 1.
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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) | 1991-11-08 | 1992-05-09 | 1992-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-08 | 1996-05-09 | 1996-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-08 | 2000-05-09 | 2000-11-08 | $7700.00 | Window Closed / Lapsed |