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Patent US4477614A successfully refreshed from Google Patents.
US4477614A
Expired / Lapsed
US
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2-[2-Hydroxy-3,5-di-tert-octylphenyl]-2H-benzotriazole stabilized compositions
Assignee: BASF Corp
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Filing: 1982-04-12
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Granted: 1984-10-16
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Expires: 2002-04-12
Abstract
Abstract 2-[2-Hydroxy-3,5-di-tert-octylphenyl]-2H-benzotriazole exhibits outstanding efficacy in protecting organic substrates from light induced deterioration as well as good resistance to loss by volatilization or exudation during the high temperature processing of stabilized compositions.
Inventors
- 👤 Martin Dexter
- 👤 Roland A. E. Winter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:51
CPC Classifications
C; C07; C07D; C07D249/00; C07D249/16; C07D249/18; C07D249/20; C07C; C07C245/00; C07C245/02; C07C245/06; C07C245/08; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3467; C08K5/3472; C08K5/3475
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
45 words
A stabilized composition which comprises (a) a dyed polyamide, which is nylon 6/6, nylon 6 or poly(m-phenylene isophthalamide), and (b) from 0.1 to 5% by weight of a compound of the formula ##STR4## wherein R 1 is hydrogen or chloro, and R 2 is tert-octyl.
Claim 2
Dependent Claim
45 words
A stabilized composition which comprises (a) a dyed polyamide, which is nylon 6/6, nylon 6 or poly(m-phenylene isophthalamide), and (b) from 0.1 to 5% by weight of a compound of the formula ##STR4## wherein R 1 is hydrogen or chloro, and R 2 is tert-octyl.
Claim 3
Dependent Claim
9 words
A composition according to claim 1 stabilized with 2-(2-hydroxy-3,5-di-tert-octylphenyl)-2H-benzotriazole.
Claim 4
Independent Claim
50 words
A method of stabilizing a dyed polyamide which comprises incorporating into said dyed polyamide, which is nylon 6/6, nylon 6 or poly(m-phenylene isophthalamide), from 0.1 to 5% by weight of said polyamide a compound of the formula ##STR5## wherein R 1 is hydrogen or chloro, and R 2 is tert-octyl.
Claim 5
Independent Claim
50 words
A method of stabilizing a dyed polyamide which comprises incorporating into said dyed polyamide, which is nylon 6/6, nylon 6 or poly(m-phenylene isophthalamide), from 0.1 to 5% by weight of said polyamide a compound of the formula ##STR5## wherein R 1 is hydrogen or chloro, and R 2 is tert-octyl.
Claim 6
Dependent Claim
14 words
A method according to claim 3 wherein the stabilizing compound being incorporated is 2-(2-hydroxy-3,5-di-tert-octylphenyl)-2H-benzotriazole.
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) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |