Claims
- 1. A composition stabilized against oxidative or thermal degradation which comprises
- (a) an organic material subject to oxidative or thermal degradation, and
- (b) an effective stabilizing amount of a compound of formula I ##STR4## wherein R.sub.1 and R.sub.2 are independently alkyl of 1 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 9 carbon atoms or said phenylalkyl substituted on the phenyl ring by alkyl of 1 to 4 carbon atoms,
- n is an integer from 1 to 4,
- when n is 1, E is a direct bond, and T is a group of formula II, III, IV, V or VI ##STR5## where R.sub.3 is hydrogen or methyl,
- R.sub.4 is alkyl of 1 to 30 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 9 carbon atoms, phenyl or said phenylalkyl or said phenyl substituted on the phenyl ring by one or two alkyl of 1 to 4 carbon atoms,
- R.sub.5 is alkyl of 1 to 30 carbon atoms, cycloalkyl of 5 or 12 carbon atoms, phenylalkyl of 7 to 9 carbon atoms, phenyl or said phenylalkyl or said phenyl substituted on the phenyl ring by one or two alkyl of 1 to 4 carbon atoms,
- when n is 2-4; E is --CH.sub.2 CH(R.sub.3)COO-- where the oxygen atom is attached to T, and
- T is an n-valent radical of an alkanepolyol of 3 to 12 carbon atoms after removal of the OH groups.
- 2. A composition according to claim 1 wherein the organic material is a synthetic polymer or a lubricant.
- 3. A composition according to claim 2 wherein the synthetic polymer is a polyolefin or elastomer.
- 4. A composition according to claim 3 wherein the polyolefin is polypropylene.
- 5. A composition according to claim 2 wherein the lubricant is a motor oil.
- 6. A composition according to claim 5 wherein the motor oil is a gasoline engine motor oil.
- 7. A composition according to claim 1 wherein the compound of component (b) is
- octadecyl 3-(4-amino-3-tert-butyl-5-methylphenylthio)-propionate;
- N-octadecyl-2-(4-amino-3-tert-butyl-5-methylphenylthio)-succinimide;
- hexamethylene bis[3-(4-amino-3-tert-butyl-5-methylphenylthio)-propionate; or
- N-(4-amino-3-tert-butyl-5-methylphenylthio)methyl-N,N-diphenylamine.
Parent Case Info
This is a division of application Ser. No. 07/602,958, filed on Oct. 24, 1990, now U.S. Pat. No. 5,145,970, issued on Sep. 8, 1992.
US Referenced Citations (7)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1175002 |
Dec 1969 |
GBX |
Non-Patent Literature Citations (1)
Entry |
Chem. Abst. 60,10600d. |
Divisions (1)
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Number |
Date |
Country |
Parent |
602958 |
Oct 1990 |
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