US3755250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenolic phosphate and phosphite antioxidants
Assignee: Ethyl Corp
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Filing: 1972-04-20
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Granted: 1973-08-28
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Expires: 1992-04-20
Abstract
Abstract Organic material, especially polypropylene, is stabilized by the addition of mono- or di- (dihydrocarbyl-hydroxyphenyl) alkyl phosphates, phosphites, thiophosphates or thiophosphites, such as 3,5-di-tert-butyl-4-hydroxyphenyl di-n-octadecyl phosphate. Effectiveness is synergistically improved by inclusion of a dialkyl thiodialkanoate such as dilaurylthiodipropionate.
Inventors
- 👤 J Wollensak
- 👤 E Zaweski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:22
CPC Classifications
C; C10; C10M; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C10M137/105; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/12; C07F9/16; C07F9/165; C07F9/18; C07F9/201; C07F9/205; C08; C08K; C08K5/00; C08K5/49; C08K5/5398; C09; C09K; C09K15/00; C09K15/04; C09K15/32; C09K15/322; C09K15/324; C10M2205/00; C10M2205/02; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/027; C10M2207/028; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/284; C10M2207/285; C10M2207/286; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2219/00; C10M2219/02; C10M2219/024; C10M2219/04; C10M2219/044; C10M2219/046; C10M2219/08; C10M2219/082; C10M2219/085; C10M2219/087; C10M2219/088; C10M2219/089; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/045; C10M2223/047; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2010/00; C10N2010/04; C10N2010/06; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/08; C10N2040/135; C10N2050/00; C10N2050/10; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
19 words
The composition of claim 1 wherein said organic material is selected from homopolymers and copolymers of ethylenically unsaturated monomers.
Claim 2
Dependent Claim
11 words
The composition of claim 2 wherein said organic material is polypropylene.
Claim 3
Dependent Claim
111 words
The composition of claim 3 wherein said compound has the formula: v,40/9 where m is an integer selected from 0 and 1, n is an integer selected from 1 and 2, R1 is selected from the group consisting of alpha-branched alkyl radicals containing three to 20 carbon atoms, alphabranched aralkyl radicals containing eight to 20 carbon atoms and cyclohexyl and cyclooctyl radicals; R2 is selected from the group consisting of alkyl radicals containing one to 20 carbon atoms, aralkyl radicals containing seven to 20 carbon atoms and cyclohexyl and cyclooctyl radicals; R3 is an alkyl radical containing one to 50 carbon atoms, and X is independently selected from oxygen and sulfur.
Claim 4
Dependent Claim
48 words
The composition of claim 1 containing a synergistic amount of a synergist having the formula: S (R5-COOR6)2 wherein R5 is a lower aliphatic hydrocarbon divalent radical containing from one to four carbon atoms, and R6 is an aliphatic hydrocarbon radical containing from about six to 50 carbon atoms.
Claim 5
Dependent Claim
11 words
The composition of claim 5 wherein said organic material is polypropylene.
Claim 6
Dependent Claim
11 words
The composition of claim 5 wherein said compound has the formula:
Claim 7
Dependent Claim
12 words
The composition of claim 4 wherein said compound is S,S-di-(3,5-di-tert-butyl-4-hydroxyphenyl) O-n-octadecyl dithiophosphate.
Claim 8
Dependent Claim
12 words
The composition of claim 4 wherein saId compound is S,S-di-(3,5-di-tert-butyl-4-hydroxyphenyl) O,O-di-n-octadecyl thiophosphate.
Claim 9
Dependent Claim
12 words
The composition of claim 4 wherein said compound is S-(3,5-di-tert-butyl-4-hydroxyphenyl) O,O-di-n-octadecyl thiophosphate.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |