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 2;
- when n is 1, R.sup.3 is alkyl of from 1 to 20 carbon atoms;
- when n is 2, R.sup.3 is alkylene of from 2 to 8 carbon atoms; and
- A is a straight or branched chained (lower) alkylene group having from 1 to 6 carbon atoms with the limitation that the terminals of said alkylene group bear only hydrogen or one (lower)alkyl group.
- 2. A composition of claim 1 which contains additionally 0.01 to 2% by weight of the polymer of a hindered phenolic antioxidant.
- 3. A composition of claim 1 wherein the stabilizer is of the formula ##STR14##wherein n is 1 or 2;
- when n is 1, R.sup.3 is alkyl of from 1 to 20 carbon atoms;
- when n is 2, R.sup.3 is alkylene of from 2 to 8 carbon atoms; and
- R.sup.4 is hydrogen or methyl.
- 4. A composition of claim 3 wherein the polymer is a polyolefin from an alpha-olefin of up to 3 carbons.
- 5. A composition of claim 3 wherein n is 1 and R.sup.3 is an alkyl of from 6 to 18 carbon atoms.
- 6. A composition of claim 3 wherein n is 2 and R.sup.3 is an alkylene of from 2 to 8 carbon atoms.
- 7. A composition of claim 1 wherein the polymer is a polyolefin from an alpha-olefin of up to 3 carbons.
- 8. A composition of claim 7 wherein R.sup.1 and R.sup.2 are independently of each other methyl or ethyl.
- 9. A composition of claim 7 wherein R.sup.1 and R.sup.2 are each methyl.
- 10. A composition of claim 7 where the stabilizer is n-dodecyl-.beta.-(15{7,15-diazadispiro[5,1,5,3]hexadecane-14,16-dione})propionate.
- 11. A composition of claim 7 where the stabilizer is n-tetramethylene bis-(.beta.-{15(7,15-diazadispiro[5,1,5,3]hexadecane-14,16-dione}propionate.
- 12. A composition of claim 7 where the stabilizer is n-octadecyl-.beta.-(15{7,15-diazadispiro[5,1,5,3]hexadecane-14,16-dione})propionate.
- 13. A composition of claim 2 wherein the phenolic antioxidant is selected from the group consisting of di-n-octadecyl .alpha.-(3-t-butyl-4-hydroxy-4-methylbenzyl)malonate, 2,4-bis(n-octylthio)-6-(3,5-di-t-butyl-4-hydroxyaniline)-1,3,5-triazine, octadecyl 3-(3', 5'-di-t-butyl-4'-hydroxyphenyl)propionate, pentaethylthritol-tetrakis[3-(3,5-di-t-butyl-4-hydroxyphenyl)]proionate, tris-(3,5-di-t-butyl-4-hydroxybenzyl)isocyanurate, respectively.
RELATED APPLICATION
This application is a Division of co-pending application Ser. No. 622,554 filed Oct. 15, 1975, now U.S. Pat. No. 3,968,078 which was a Divisional of Ser. No. 376,785, filed July 5, 1973, now U.S. Pat. No. 3,920,659, which is a continuation-in-part of co-pending application Ser. No. 239,795, filed Mar. 30, 1972 now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3968078 |
Ramey et al. |
Jul 1976 |
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Divisions (2)
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Number |
Date |
Country |
Parent |
622554 |
Oct 1975 |
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Parent |
376785 |
Jul 1973 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
239795 |
Mar 1972 |
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