US4242224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color stabilization of amine antioxidant and antiozonant emulsions
Assignee: Goodyear Tire and Rubber Co
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Filing: 1979-08-17
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Granted: 1980-12-30
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Expires: 1999-08-17
Abstract
Abstract Pink discoloration in amine antioxidant and antiozonant emulsions utilized in the latex industry at high pH has been prevented or retarded by the addition of stabilizers selected from dialkylhydroxylamines or mercaptans. These stabilizers are added at a ratio of from 0.1 to 5 parts by weight per 100 parts by weight of the age resister. In addition, a reversal of discoloration in a liquid amine antioxidant has been achieved by mixing the same type of stabilizer directly with the antioxidant.
Inventors
- 👤 II Paul R. Dean
- 👤 Joseph A. Kuczkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:52
CPC Classifications
C; C09; C09K; C09K15/00; C09K15/04; C09K15/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
106 words
A color-stabilized composition comprising a combination of: 1. an amine age resister comprising an antioxidant or antiozonant selected from the group consisting of: a. p-styrenated diphenylamines having the formula: ##STR6## wherein R 4 is selected from phenyl and p-tolyl radicals, and R 5 is selected from H, and methyl; b. alkylated diphenylamine derivatives having the formula: ##STR7## wherein R 1 and R 2 are alkyl radicals (2-12C); c. N-phenyl, N'-alkyl-p-phenylenediamines having the following formula: ##STR8## wherein R 3 is an alkyl radical (2-8C); and d. dihydroquinolines having the formula ##STR9## wherein R 1 is an alkyl radical having 2 to 12 carbon atoms (2-12C): with: 2.
Claim 2
Dependent Claim
106 words
A color-stabilized composition comprising a combination of: 1. an amine age resister comprising an antioxidant or antiozonant selected from the group consisting of: a. p-styrenated diphenylamines having the formula: ##STR6## wherein R 4 is selected from phenyl and p-tolyl radicals, and R 5 is selected from H, and methyl; b. alkylated diphenylamine derivatives having the formula: ##STR7## wherein R 1 and R 2 are alkyl radicals (2-12C); c. N-phenyl, N'-alkyl-p-phenylenediamines having the following formula: ##STR8## wherein R 3 is an alkyl radical (2-8C); and d. dihydroquinolines having the formula ##STR9## wherein R 1 is an alkyl radical having 2 to 12 carbon atoms (2-12C): with: 2.
Claim 3
Dependent Claim
49 words
a reducing agent which is also a hydrogen donor selected from the group consisting of: a. dialkylhydroxylamines (2-12C), and b. mercaptans selected from the group consisting of alkyl, phenyl, and aralkyl mercaptans, 3. at a ratio of from 0.1 to 5 parts by weight reducing agent per 100 parts
Claim 4
Dependent Claim
49 words
a reducing agent which is also a hydrogen donor selected from the group consisting of: a. dialkylhydroxylamines (2-12C), and b. mercaptans selected from the group consisting of alkyl, phenyl, and aralkyl mercaptans, 3. at a ratio of from 0.1 to 5 parts by weight reducing agent per 100 parts
Claim 5
Dependent Claim
28 words
by weight amine age resister. 2. The color-stabilized combination as recited in claim 1 wherein the amine age resister is a liquid p-styrenated diphenylamine having the formula ##STR10##
Claim 6
Dependent Claim
21 words
The color-stabilized combination as recited in claim 2 wherein the reducing agent is a mercaptan having 12 or more carbon atoms.
Claim 7
Dependent Claim
11 words
The color-stabilized combination of claim 3 wherein mercaptan is lauryl mercaptan.
Claim 8
Dependent Claim
30 words
The color-stabilized combination as recited in claim 2 which is in the form of an emulsion comprising the liquid amine age resister, water, an emulsifying surfactant, and the reducing agent.
Claim 9
Dependent Claim
16 words
The color-stabilized combination as recited in claim 5 wherein the reducing agent is a dialkylhydroxylamine (2-12C).
Claim 10
Dependent Claim
14 words
The color-stabilized combination as recited in claim 6 wherein the reducing agent is diethylhydroxylamine.
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) | 1983-12-30 | 1984-06-30 | 1984-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-30 | 1988-06-30 | 1988-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-30 | 1992-06-30 | 1992-12-30 | $7700.00 | Window Closed / Lapsed |