US3717610A
Expired / Lapsed
US
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Stabilization of polyolefins and rubbers with a phenolic phosphate
Assignee: Ethyl Corp
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Filing: 1969-03-17
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Granted: 1973-02-20
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Expires: 1989-03-17
Abstract
Abstract Organic material is stabilized by the addition of a tris(3,5dihydrocarbyl-4-hydroxyphenyl)phosphate, either alone or in combination with a dialkylthiodialkanoate.
Inventors
- 👤 B Meltsner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:09
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/521
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
110 words
Natural and synthetic rubber, polyolefins normally susceptible to deterioration due to the effects of oxygen containing a stabilizing quantity of a compound having the formula: wherein R1 is selected from the group consisting of alpha-branched alkyl radicals containing from three to 18 carbon atoms, alpha-branched aralkyl radicals containing from eight to 18 carbon atoms and cycloalkyl radicals containing from six to 18 carbon atoms; and R2 is selected from the group consisting of alkyl radicals containing from one to 18 carbon atoms, aralkyl radicals containing from seven to 18 carbon atoms, aryl radicals containing from six to 18 carbon atoms and cycloalkyl radicals containing from six to 18 carbon atoms.
Claim 2
Dependent Claim
110 words
Natural and synthetic rubber, polyolefins normally susceptible to deterioration due to the effects of oxygen containing a stabilizing quantity of a compound having the formula: wherein R1 is selected from the group consisting of alpha-branched alkyl radicals containing from three to 18 carbon atoms, alpha-branched aralkyl radicals containing from eight to 18 carbon atoms and cycloalkyl radicals containing from six to 18 carbon atoms; and R2 is selected from the group consisting of alkyl radicals containing from one to 18 carbon atoms, aralkyl radicals containing from seven to 18 carbon atoms, aryl radicals containing from six to 18 carbon atoms and cycloalkyl radicals containing from six to 18 carbon atoms.
Claim 3
Dependent Claim
10 words
The composition of claim 1 wherein said compound is tris(3,5-di-tert-butyl-4-hydroxyphenyl)phosphate.
Claim 4
Dependent Claim
12 words
The composition of claim 1 wherein said organic material is a polyolefin.
Claim 5
Dependent Claim
10 words
The composition of claim 3 wherein said compound is tris(3,5-di-tert-butyl-4-hydroxyphenyl)phosphate.
Claim 6
Dependent Claim
11 words
The composition of claim 3 wherein said polyolefin is a polyethylene.
Claim 7
Dependent Claim
11 words
The composition of claim 3 wherein said polyolefin is a polypropylene.
Claim 8
Dependent Claim
10 words
The composition of claim 6 wherein said compound is tris(3,5-di-tert-butyl-4-hydroxyphenyl)phosphate.
Claim 9
Dependent Claim
74 words
The organic material of claim 1 containing additionally a synergistic amount of a synergist having the formula: S -(CH2)n-COOR3)2 wherein n is an integer from 1 to 5, and R3 is selected from the group consisting of alkyl radicals containing from one to 20 carbon atoms, aryl radicals containing from six to 20 carbon atoms, aralkyl radicals containing from seven to 20 carbon atoms and cycloalkyl radicals containing from six to 20 carbon atoms.
Claim 10
Dependent Claim
12 words
The composition of claim 8 wherein said organic material is a polyolefin.
Claim 11
Dependent Claim
11 words
The composition of claim 9 wherein said polyolefin is a polyethylene.
Claim 12
Dependent Claim
11 words
The composition of claim 9 wherein said polyolefin is a polypropylene.
Claim 13
Dependent Claim
10 words
The composition of claim 11 wherein said synergist is dilaurylthiodipropionate.
Claim 14
Dependent Claim
11 words
The composition of claim 12 wherein said compound is tris(3, 5-di-tert-butyl-4-hydroxyphenyl)phosphate.
Claim 15
Dependent Claim
10 words
The composition of claim 8 wherein said synergist is dilaurylthiodipropionate.
Claim 16
Dependent Claim
11 words
The composition of claim 14 wherein said compound is tris(3, 5-di-tert-butyl-4-hydroxyphenyl)phosphate.
Claim 17
Dependent Claim
22 words
The composition of claim 3 wherein said polyolefin is a polymer of an olefin monomer containing from two to four carbon atoms.
Claim 18
Dependent Claim
11 words
The composition of claim 16 wherein said compound is tris(3, 5-di-tert-butyl-4-hydroxyphenyl)phosphate.
Claim 19
Dependent Claim
22 words
The composition of claiM 9 wherein said polyolefin is a polymer of an olefin monomer containing from two to four carbon atoms.
Claim 20
Dependent Claim
11 words
The composition of claim 18 wherein said compound is tris(3, 5-di-tert-butyl-4-hydroxyphenyl)phosphate.
Claim 21
Dependent Claim
10 words
The composition of claim 19 wherein said synergist is dilaurylthiodipropionate.
Claim 22
Dependent Claim
87 words
A stabilizing composition comprising from 1 to 99 weight percent of a compound of claim 1 and from 1 to 99 weight percent of a synergistic compound having the formula: S -(CH2)n-COOR3)2 wherein n is an integer from 1 to 5, and R3 is selected from the group consisting of alkyl radicals containing from one to 20 carbon atoms, aryl radicals containing from six to 20 carbon atoms, aralkyl radicals containing from seven to 20 carbon atoms and cycloalkyl radicals containing from six to 20 carbon atoms.
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) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |