US4582870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dioxasilepin and dioxasilocin stabilizers
Assignee: BASF Corp
•
Filing: 1985-01-07
•
Granted: 1986-04-15
•
Expires: 2005-01-07
Abstract
Abstract Hindered silane compounds of the formula <IMAGE> are prepared by the reaction of the appropriate silane and phenol compounds, said hindered silanes being useful as stabilizers of organic polymers such as polyolefins, vinyl halide polymers, elastomers, polyesters and polycarbonates.
Inventors
- 👤 John d. Spivack
- 👤 Stephen D. Pastor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:39
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C07F7/04; C07F7/07; C08; C08K; C08K5/00; C08K5/54; C08K5/549
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
99 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 the formula ##STR7## wherein R 1 and R 2 independently are hydrogen, alkyl of 1 to 4 carbon atoms or phenyl; or R 1 and R 2 together form ##STR8## X is a direct bond, alkylidene of 1 to 7 carbon atoms or sulfur; Y is alkyl of 4 to 12 carbon atoms or alkaryl of 7 to 12 carbon atoms; and Z is hydrogen, alkyl from 1 to 12 carbon atoms or phenyl.
Claim 2
Dependent Claim
99 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 the formula ##STR7## wherein R 1 and R 2 independently are hydrogen, alkyl of 1 to 4 carbon atoms or phenyl; or R 1 and R 2 together form ##STR8## X is a direct bond, alkylidene of 1 to 7 carbon atoms or sulfur; Y is alkyl of 4 to 12 carbon atoms or alkaryl of 7 to 12 carbon atoms; and Z is hydrogen, alkyl from 1 to 12 carbon atoms or phenyl.
Claim 3
Dependent Claim
22 words
The composition of claim 1, wherein Y is in the ortho position to the silane oxygen in each of the phenyl rings.
Claim 4
Dependent Claim
15 words
The composition of claim 2, wherein Y is alkyl of 4 to 8 carbon atoms.
Claim 5
Dependent Claim
9 words
The composition of claim 3, wherein Y is tert-butyl.
Claim 6
Dependent Claim
31 words
The composition of claim 2, wherein Z is tert-alkyl of 4 to 8 carbon atoms and is in the para position to the silane oxygen in each of the phenyl rings.
Claim 7
Dependent Claim
17 words
The composition of claim 2, wherein X is alkylidene of 1 to 7 carbon atoms or sulfur.
Claim 8
Dependent Claim
41 words
The composition of claim 6, wherein X is alkylidene of the formula ##STR9## wherein R 3 and R 4 independently are hydrogen or alkyl of 1 to 4 carbon atoms, provided that the number of carbon atoms does not exceed 7.
Claim 9
Dependent Claim
13 words
A composition of claim 1, wherein the organic material is a synthetic polymer.
Claim 10
Dependent Claim
15 words
A composition of claim 8, wherein said synthetic polymer is a polyolefin homopolymer or copolymer.
Claim 11
Independent Claim
103 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 of the formula ##STR10## wherein R 1 and R 2 independently are hydrogen, alkyl of 1 to 4 carbon atoms or phenyl; or R 1 and R 2 together form ##STR11## X is a direct bond, alkylidene of 1 to 7 carbon atoms or sulfur; Y is alkyl of 4 to 12 carbon atoms or alkaryl of 7 to 12 carbon atoms; and Z is hydrogen, alkyl from 1 to 12 carbon atoms or phenyl.
Claim 12
Independent Claim
103 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 of the formula ##STR10## wherein R 1 and R 2 independently are hydrogen, alkyl of 1 to 4 carbon atoms or phenyl; or R 1 and R 2 together form ##STR11## X is a direct bond, alkylidene of 1 to 7 carbon atoms or sulfur; Y is alkyl of 4 to 12 carbon atoms or alkaryl of 7 to 12 carbon atoms; and Z is hydrogen, alkyl from 1 to 12 carbon atoms or phenyl.
References Cited (Backward Citations)
US3647749A
Cited
US4283505A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-14 | 1989-10-14 | 1990-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-14 | 1993-10-14 | 1994-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-14 | 1997-10-14 | 1998-04-15 | $7700.00 | Window Closed / Lapsed |