US4383950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphite stabilizers
Assignee: BASF Corp
•
Filing: 1981-10-14
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Granted: 1983-05-17
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Expires: 2001-10-14
Abstract
Abstract Compounds of the general formula (I) ##STR1## in which R 1 is an α-branched alkyl group having 3 to 12 carbon atoms, cyclohexyl, phenyl or α,α-dimethylbenzyl and R 2 is methyl, isopropyl, tert.-butyl, tert.-pentyl, 1,1,3,3-tetramethylbutyl, nonyl, 1,1,3,3,5,5-hexamethylhexyl or α,α-dimethylbenzyl, only one of R 1 and R 2 being 1,1,3,3-tetramethylbutyl and at least one of R 1 and R 2 possessing at least 8 carbon atoms, and R 3 is hydrogen or methyl, or R 3 together with R 2 is 1,1,3,3-tetramethyl-1,3-propylene, are suitable as stabilizers for organic material to protect it against thermo-oxidative and light-induced degradation.
Inventors
- 👤 Michael Rasberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:35
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/524; C08K5/526; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/141; C07F9/145
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
37 words
A compound of formula I ##STR4## wherein R 1 is 1,1,3,3-tetramethylbutyl, R 2 is methyl, isopropyl, tert-butyl, tert-amyl, nonyl or 1,1,3,3,5,5-hexamethylhexyl, and R 3 is hydrogen or methyl, or R 3 together with R 2 is 1,1,3,3-tetramethyl-1,3-propylene.
Claim 2
Dependent Claim
37 words
A compound of formula I ##STR4## wherein R 1 is 1,1,3,3-tetramethylbutyl, R 2 is methyl, isopropyl, tert-butyl, tert-amyl, nonyl or 1,1,3,3,5,5-hexamethylhexyl, and R 3 is hydrogen or methyl, or R 3 together with R 2 is 1,1,3,3-tetramethyl-1,3-propylene.
Claim 3
Dependent Claim
22 words
A compound according to claim 1, of formula I, wherein R 2 is tert-butyl, tert-amyl or 1,1,3,3,5,5-hexamethylhexyl, and R 3 is hydrogen.
Claim 4
Dependent Claim
13 words
A compound according to claim 1 which is tris-[2-(1,1,3,3-tetramethylbutyl)-4-tert-butylphenyl]phosphite, tris-[2-(1,1,3,3-tetramethylbutyl)-4-methylphenyl]phosphite, tris-[2-(1,1,3,3-tetramethylbutyl)-4-nonylphenyl]phosphite or tris-[1,1,3,3-tetramethyl-5-(1,1,3,3-tetramethylbutyl)-indan-6-yl]phosphite.
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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) | 1986-05-16 | 1986-11-15 | 1987-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-16 | 1990-11-15 | 1991-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-16 | 1994-11-15 | 1995-05-17 | $7700.00 | Window Closed / Lapsed |