US4007230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antioxidant composition for stabilizing polyols
Assignee: Dow Chemical Co
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Filing: 1975-02-24
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Granted: 1977-02-08
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Expires: 1995-02-24
Abstract
Abstract Synergistic antioxidant compositions consisting of certain hindered phenols such as 2,4-dimethyl-6-octyl phenol and 4,4'-bis (α,α-dimethylbenzyl) diphenyl amine are useful to stabilize polyether polyols against oxidative degradation and prevent scorch in polyurethane foams prepared from the polyether polyols.
Inventors
- 👤 Kenneth J. Hinze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:41
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/16; C08K5/17; C08K5/18; C09; C09K; C09K15/00; C09K15/04; C09K15/20; C09K15/24; C08J2375/00; C08J2375/04; C08J2375/06; C08J2375/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
59 words
A polyether polyol or mixture of such polyols containing as a stabilizer against oxidative degradation from about 500 to about 100,000 ppm of an antioxidant composition containing: A. from about 15 to about 85 percent by weight of a phenolic antioxidant selected from the group consisting of 2,4-dimethyl-6-octyl phenol, 2,6-ditertiarybutyl-4-methyl phenol, 2,6-ditertiarybutyl-4-ethyl phenol, 2,6-ditertiarybutyl-4-n-butyl phenol, 2,2'-methylenebis (4-methyl-6-tertiarybutyl phenol), 2.
Claim 2
Dependent Claim
59 words
A polyether polyol or mixture of such polyols containing as a stabilizer against oxidative degradation from about 500 to about 100,000 ppm of an antioxidant composition containing: A. from about 15 to about 85 percent by weight of a phenolic antioxidant selected from the group consisting of 2,4-dimethyl-6-octyl phenol, 2,6-ditertiarybutyl-4-methyl phenol, 2,6-ditertiarybutyl-4-ethyl phenol, 2,6-ditertiarybutyl-4-n-butyl phenol, 2,2'-methylenebis (4-methyl-6-tertiarybutyl phenol), 2.
Claim 3
Dependent Claim
36 words
2'-methylenebis (4-ethyl-6-tertiarybutyl phenol), 2,4-dimethyl-6-tertiarybutyl phenol, 4-hydroxymethyl-2,6-ditertiarybutyl phenol, n-octadecyl-beta (3,5-ditertiarybutyl-4-hydroxyphenyl)propionate, and mixtures thereof; B. from about 85 to about 15 percent by weight of 4,4'-bis(α,α-dimethylbenzyl)diphenylamine; and wherein said polyether polyol contains from 2 to about 8 hydroxyl
Claim 4
Dependent Claim
36 words
2'-methylenebis (4-ethyl-6-tertiarybutyl phenol), 2,4-dimethyl-6-tertiarybutyl phenol, 4-hydroxymethyl-2,6-ditertiarybutyl phenol, n-octadecyl-beta (3,5-ditertiarybutyl-4-hydroxyphenyl)propionate, and mixtures thereof; B. from about 85 to about 15 percent by weight of 4,4'-bis(α,α-dimethylbenzyl)diphenylamine; and wherein said polyether polyol contains from 2 to about 8 hydroxyl
Claim 5
Dependent Claim
84 words
groups and has a molecular weight of from about 250 to about 10,000. 2. The polyether polyol of claim 1 wherein Component (A) is present in quantities of from about 25 to about 75 percent by weight and Component (B) is present in quantities of from about 75 to about 25 percent by weight; the antioxidant composition is present in quantities of from about 1500 to about 5000 ppm and said polyether polyols have a molecular weight of from about 2000 to about 8000.
Claim 6
Dependent Claim
33 words
The polyether polyol of claim 2 wherein Component A. is selected from the group consisting of 2,4-dimethyl-6-octyl phenol, 2,6-ditertiarybutyl-4-methyl phenol, 2,6-ditertiarybutyl-4-ethyl phenol, 2,6-ditertiarybutyl-4-n-butyl phenol, 2,2'-methylenebis (4-methyl-6-tertiarybutyl phenol), 2,2'-methylenebis (4-ethyl-6-tertiarybutyl phenol), and mixtures thereof.
Claim 7
Dependent Claim
19 words
The polyether polyol of claim 3 wherein the polyol has an average functionality of from 2 to about 4.
Claim 8
Dependent Claim
34 words
The polyether polyol of claim 4 wherein the polyol is a polyoxyalkylene derivative of a member selected from the group consisting of ethylene glycol, propylene glycol, glycerine, trimethylol propane, pentaerythritol, sucrose and mixtures thereof.
Claim 9
Dependent Claim
22 words
The polyether polyol of claim 5 wherein the oxyalkylene groups are selected from the group consisting of oxypropylene, oxyethylene and mixtures thereof.
Claim 10
Dependent Claim
12 words
The polyether polyol of claim 6 wherein said polyol is glycerine initiated.
Claim 11
Dependent Claim
18 words
The polyether polyol of claim 7 wherein the oxyalkylene groups are a mixture of oxyethylene and oxypropylene groups.
Claim 12
Dependent Claim
12 words
The polyether polyol of claim 8 wherein Component (A) is 2,6-ditertiarybutyl-4-methyl phenol.
References Cited (Backward Citations)
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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) | 1980-02-08 | 1980-08-09 | 1981-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-08 | 1984-08-09 | 1985-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-08 | 1988-08-09 | 1989-02-08 | $7700.00 | Window Closed / Lapsed |