US4066619A
Expired / Lapsed
US
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4-hydroxydiphenyl sulfoxide compositions
Assignee: Goodrich Corp
•
Filing: 1976-11-02
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Granted: 1978-01-03
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Expires: 1996-11-02
Abstract
Abstract Polyolefins are stabilized against heat and light degradation by including in said polyolefins an unsymmetrical 4-hydroxydiphenyl sulfoxide.
Inventors
- 👤 Dwight William Chasar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:20
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/41
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
78 words
A polyolefin containing a stabilizing amount of a 4-hydroxydiphenyl sulfoxide of the formula ##STR8## wherein R 1 is hydrogen, R 2 is a lower alkyl or halogen, wherein R 3 is hydrogen or a lower alkyl from one to 6 carbon atoms, R 4 is hydrogen or lower alkyl, R 6 is hydrogen, lower alkyl or alkoxy containing from 1 to 6 carbon atoms and R 7 is hydrogen or lower alkyl from 1 to 6 carbon atoms.
Claim 2
Dependent Claim
78 words
A polyolefin containing a stabilizing amount of a 4-hydroxydiphenyl sulfoxide of the formula ##STR8## wherein R 1 is hydrogen, R 2 is a lower alkyl or halogen, wherein R 3 is hydrogen or a lower alkyl from one to 6 carbon atoms, R 4 is hydrogen or lower alkyl, R 6 is hydrogen, lower alkyl or alkoxy containing from 1 to 6 carbon atoms and R 7 is hydrogen or lower alkyl from 1 to 6 carbon atoms.
Claim 3
Dependent Claim
26 words
A polyolefin of claim 1 wherein the 4-hydroxydiphenyl sulfoxide is present in amounts of about 0.1 to 10 weight parts per 100 weight parts of polyolefin.
Claim 4
Dependent Claim
10 words
A composition of claim 2 wherein said polyolefin is polypropylene.
Claim 5
Dependent Claim
11 words
A composition of claim 3 wherein said sulfoxide is 4-hydroxydiphenyl sulfoxide.
Claim 6
Dependent Claim
11 words
A composition of claim 3 wherein said sulfoxide is 3,5-di-5-butyl-4-hydroxydiphenyl sulfoxide.
Claim 7
Dependent Claim
11 words
A composition of claim 3 wherein said sulfoxide is 4-hydroxy-4'-t-butyldiphenyl sulfoxide.
Claim 8
Dependent Claim
11 words
A composition of claim 3 wherein said sulfoxide is 4-hydroxy-2-methoxy-4'-t-butyldiphenyl sulfoxide.
Claim 9
Dependent Claim
11 words
A composition of claim 3 wherein said sulfoxide is 2-methoxy-4-hydroxydiphenyl sulfoxide.
Claim 10
Dependent Claim
11 words
A composition of claim 3 wherein said sulfoxide is 4-hydroxy-2-methoxy-4'-chlorodiphenyl sulfoxide.
Claim 11
Dependent Claim
11 words
A composition of claim 3 wherein said sulfoxide is 4-hydroxy-4'-chlorodiphenyl sulfoxide.
References Cited (Backward Citations)
US3282887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |