Patent US4857572A successfully refreshed from Google Patents.
US4857572A
Expired / Lapsed
US
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Substituted phenols as stabilizers
Assignee: BASF Corp
•
Filing: 1988-02-10
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Granted: 1989-08-15
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Expires: 2008-02-10
Abstract
Abstract Novel compositions are described which contain an elastomer or a tackifying resin and at least one compound of formula I ##STR1## The symbols R 1 is alkyl or cycloalkyl, R 2 is alkyl, hydroxyalkyl, phenyl or benzyl, and R 3 is hydrogen or methyl with the proviso that, when R 1 is other than methyl, R 3 is methyl.
Inventors
- 👤 Hans-Rudolf Meier
- 👤 Gerrit Knobloch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:54
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C07; C07C; C07C323/00; C08K5/36; C08K5/37; C08K5/375; C10; C10M; C10M135/00; C10M135/20; C10M135/22; C10M135/24; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/084
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
93 words
A stabilized composition which comprises (a) an elastomer or a tackifying resin, and (b) a stabilizing amount of at least one compound of formula I ##STR9## wherein R 1 is C 1 -C 4 -alkyl, R 2 , each independently of the other, are C 1 -C 18 -alkyl, --CH 2 COOR 5 with R 5 being C 1 -C 20 -alkyl, --CH 2 CH 2 OH, phenyl or benzyl, and R 3 is hydrogen or methyl, with the proviso that, when R 1 is other than methyl, then R 3 is methyl.
Claim 2
Dependent Claim
93 words
A stabilized composition which comprises (a) an elastomer or a tackifying resin, and (b) a stabilizing amount of at least one compound of formula I ##STR9## wherein R 1 is C 1 -C 4 -alkyl, R 2 , each independently of the other, are C 1 -C 18 -alkyl, --CH 2 COOR 5 with R 5 being C 1 -C 20 -alkyl, --CH 2 CH 2 OH, phenyl or benzyl, and R 3 is hydrogen or methyl, with the proviso that, when R 1 is other than methyl, then R 3 is methyl.
Claim 3
Dependent Claim
12 words
A composition according to claim 1 wherein component (a) is an elastomer.
Claim 4
Dependent Claim
24 words
A composition according to claim 1 wherein R 2 , each independently of the other, are C 2 -C 18 -alkyl, phenyl or benzyl.
Claim 5
Dependent Claim
13 words
A composition according to claim 2 wherein R 1 is methyl or tert-butyl.
Claim 6
Dependent Claim
18 words
A composition according to claim 1 wherein R 2 is C 4 -C 18 -alkyl, phenyl or benzyl.
Claim 7
Dependent Claim
15 words
A composition according to claim 5 wherein R 2 is C 4 -C 18 -alkyl.
Claim 8
Dependent Claim
18 words
A composition according to claim 1 wherein the elastomer is a polydiene, a halogen-containing polymer or a polyurethane.
Claim 9
Dependent Claim
26 words
A composition according to claim 1 which contains 0.05 to 5.0% by weight of component (b), based on the elastomer or tackifying resin of component (a).
Claim 10
Dependent Claim
24 words
A compound of formula II ##STR10## wherein R 7 , each independently of the other, are C 8 -C 18 -alkyl, phenyl or benzyl.
Claim 11
Dependent Claim
24 words
A compound of formula II ##STR10## wherein R 7 , each independently of the other, are C 8 -C 18 -alkyl, phenyl or benzyl.
Claim 12
Dependent Claim
21 words
A compound according to claim 9 wherein R 7 , each independently of the other, are C 8 -C 18 -alkyl.
Claim 13
Dependent Claim
44 words
A compound of formula II ##STR11## wherein the radicals R 7 , each independently of the other, are C 8 -C 18 -alkyl --CH 2 COOR 5 with R 5 being C 1 -C 20 -alkyl, --CH 2 CH 2 OH, phenyl or benzyl.
Claim 14
Dependent Claim
44 words
A compound of formula II ##STR11## wherein the radicals R 7 , each independently of the other, are C 8 -C 18 -alkyl --CH 2 COOR 5 with R 5 being C 1 -C 20 -alkyl, --CH 2 CH 2 OH, phenyl or benzyl.
Claim 15
Dependent Claim
28 words
A method of stabilizing lubricants against the action of oxygen, heat and energy-rich radiation, which comprises incorporating therein a stabilizing amount of a compound according to claim 11.
Claim 16
Dependent Claim
22 words
A stabilized composition which comprises (a) a lubricant, and (b) a stabilizing amount of at least one compound according to claim 11.
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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) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |