Claims
- 1. A composition of matter stabilized against ultraviolet deterioration which comprises a synthetic organic polymer normally subject to ultraviolet deterioration and from 0.01 to 2% by weight of the polymer of a stabilizing compound of the formula ##STR13## wherein R.sup.1 and R.sup.2 are independently of each other methyl or ethyl or together with the carbon to which they are bound form a cyclopentyl or cyclohexyl ring, which is unsubstituted or substituted with a methyl group;
- n is an integer of from 1 to 4; and
- each of R.sup.3 and R.sup.4 is the same or different (lower)alkyl group having from 1 to 8 carbon atoms, wherein at least one of said alkyl groups is branched on the .alpha. carbon atom.
- 2. A composition of claim 1 containing additionally from 0.01 to 2% by weight of the polymer of a hindered phenolic antioxidant.
- 3. A composition of claim 2 where the polymer is a polyolefin of alpha-olefin having to 3 carbons.
- 4. A composition of claim 3 where the stabilizing compound is of the formula ##STR14##
- 5. A composition according to claim 4 wherein R.sup.3 and R.sup.4 is tertiary butyl group.
- 6. A composition of claim 3 wherein R.sup.1 and R.sup.2 is methyl group; and R.sup.3 and R.sup.4 is a tertiary butyl group.
- 7. A composition of claim 3 where the stabilizer is 15-(3',5'-di-t-butyl-4'-hydroxybenzyl)-7,15-diazadispiro [5,1,5,3]hexadecane-14,16-dione.
- 8. A composition of claim 3 where the stabilizer is 15-(3'-methyl-5'-t-butyl-4'-hydroxybenzyl)-7,15-diazadispiro [5,1,5,3,]hexadecane-14,16-dione.
- 9. A composition of claim 3 where the stabilizer is 4(3',5'-di-t-butyl-4'-hydroxybenzyl)-2,2,6,6-tetramethyl-3,5-diketopiperazine.
- 10. A composition of claim 3 where the stabilizer is 15-{.beta.-(3',5'-di-t-butyl-'4-hydroxyphenyl)ethyl}7,15,diazodispiro [5,1,5,3]hexadecane-14,16-dione.
- 11. A composition of claim 3 where the hindered phenol antioxidant is selected from the group consisting of di-n-octadecyl .alpha.-(3-t-butyl-4-hydroxy-5-methylbenzyl)malonate, 2,4-bis-(n-octylthio)-6-(3,5-di-t-butyl-4-hydroxyanilino)-1,3,5-triazine, octadecyl 3-(3',5'-di-t-butyl-4'-hydroxyphenyl)propionate, pentaethylthritoltetrakis{3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate},-tris(3,5-di-t-butyl-4-hydroxybenzyl)isocyanurate, respectively.
RELATED APPLICATION
This is a Division of Ser. No. 622,553 filed Oct. 15, 1975 now U.S. Pat. No. 3,969,316 which was the Division of Ser. No. 378,472 filed July 12, 1973 now U.S. Pat. No. 3,919,234 which in turn was a Continuation-in-Part of Ser. No. 237,981 filed Mar. 24, 1972, now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3969316 |
Ramey et al. |
Jul 1976 |
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Divisions (2)
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Number |
Date |
Country |
Parent |
622553 |
Oct 1975 |
|
Parent |
378472 |
Jul 1973 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
237981 |
Mar 1972 |
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