Claims
- 1. A composition of matter stabilized against ultraviolet deterioration which comprises a synthetic organic polymer normally subject to ultraviolet deterioration containing from 0.01% to 2% by weight of the polymer of a stabilizing compound having the formula ##STR14## 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 3;
- when n is 1, R.sup.3 is alkyl of from 1 to 20 carbon atoms or a benzyl group; when n is 2, R.sup.3 is alkylene of from 1 to 20 carbon atoms, a p-xylylene group or an alkyl substituted p-xylylene group, of the formula ##STR15## wherein R.sup.4, R.sup.5, R.sup.6 and R.sup.7 are hydrogen or lower alkyl having from 1 to 5 carbon atoms;
- when n is 3, R.sup.3 is a 1,3,5-mesitylene group or a 2,4,6-alkyl substituted mesitylene group, of the formula ##STR16## wherein R.sup.8, R.sup.9, and R.sup.10 are hydrogen or lower alkyl, having from 1 to 5 carbon atoms.
- 2. A composition of matter according to claim 1 which additionally contains a stabilizing amount of a hindered phenolic compound.
- 3. The composition of claim 1 wherein said stabilizer has the formula ##STR17## wherein n is an integer of from 1 to 3;
- when n is 1, R.sup.3 is alkyl of from 1 to 20 carbon atoms or a benzyl group;
- when n is 2, R.sup.3 is alkylene of from 1 to 20 carbon atoms, a p-xylylene group or an alkyl substituted p-xylylene group, of the formula ##STR18## wherein R.sup.4, R.sup.5, R.sup.6, R.sup.7 is hydrogen or lower alkyl group having from 1 to 5 carbon atoms;
- when n is 3, R.sup.3 is a 1,3,5-mesitylene group or a 2,4,6-alkyl substituted mesitylene group, of the formula ##STR19## wherein R.sup.8, R.sup.9, and R.sup.10 are hydrogen or lower alkyl, having from 1 to 5 carbon atoms.
- 4. The composition of claim 1 wherein said stabilizer compound n is 1 or 2;
- when n is 1, R.sup.3 is alkyl having from 6 to 18 carbon atoms or benzyl;
- when n is 2, R.sup.3 is alkylene having from 2 to 12 carbon atoms or a p-xylylene group.
- 5. The composition of claim 1 wherein R.sup.1 and R.sup.2 in said stabilizer compound are independently of each other methyl or ethyl.
- 6. The composition according to claim 1 wherein the stabilizer composition R.sup.1 and R.sup.2 are a methyl group;
- n is 1 or 2;
- when n is 1, R.sup.3 is alkyl having from 6 to 18 carbon atoms or benzyl;
- when n is 2, R.sup.3 is alkylene having from 2 to 12 carbon atoms or a p-xylylene group.
- 7. The composition of claim 1 wherein said stabilizer compound is 15-n-octadecyl-7,15-diazadispiro[5,1,5,3]hexadecane-14,16-dione.
- 8. The composition of claim 1 wherein the stabilizer compound is 15-benzyl-7,15-diazadispiro[5,1,5,3]hexadecane-14,16-dione.
- 9. The composition of claim 1 wherein said stabilizer compound is 15,15'-(2",3",5",6"-tetramethyl p-xylilidenyl)bis(7,15-diazadispiro[5,1,5,3]hexadecane-14,16-dione.
- 10. The composition of claim 1 wherein said stabilizer compound is 15,15'-n-dodecamethylene bis(7,15-diazadispiro[5,1,5,3]-hexadecane-14,16-dione).
- 11. The composition of claim 1 wherein said stabilizer compound is 15,15'-n-octamethylene bis(7,15-diazadispiro[5,1,5,3]hexadecane-14,16-dione).
- 12. The composition of claim 1 wherein said stabilizer compound is 15,15',15"-(2,5,6-trimethyl-.alpha.,.alpha.',.alpha."-mesitylidene)tris(7,15-diazadispiro[5,1,5,3]hexadecane-14-16-dione).
- 13. The composition of claim 1 wherein said stabilizer compound is 15,15'-tetramethylene bis(7,15-diazadispiro[5,1,5,3]hexadecane-14,16-dione).
- 14. The composition of claim 1 wherein said stabilizer compound is 4-n-octadecyl-2,2,6,6-tetramethyl-3,5-diketopiperazine.
- 15. The composition of claim 1 wherein said stabilizer compound is 15-methyl-7,15-diazadispiro[5,1,5,3]hexadecane-14,16-dione.
- 16. The composition of claim 1 wherein said stabilizer compound is 15-n-octyl-7,15-diazadispiro[5,1,5,3]hexadecane-14,16-dione.
- 17. The composition of claim 1 wherein said stabilizer compound is 4-benzyl-2,2,6,6-tetramethyl-3,5-diketopiperazine.
- 18. The composition of claim 1 wherein said stabilizer compound is 4,4'-(n-dodecamethylene)bis(2,2,6,6-tetramethyl-3,5-diketopiperazine).
Related Application
This is a Divisional of application Ser. No. 633,202 filed on Nov. 19, 1975, now U.S. Pat. No. 4,051,137 which is a DIV. of Ser. No. 391,200, filed Aug. 24, 1973, now U.S. Pat. No. 3,928,357, which is a CIP of application Ser. No. 237,982, filed Mar. 24, 1972, now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3928357 |
Ramey et al. |
Dec 1975 |
|
4051137 |
Ramey et al. |
Sep 1977 |
|
Divisions (2)
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Number |
Date |
Country |
Parent |
633202 |
Nov 1975 |
|
Parent |
391200 |
Aug 1973 |
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Continuation in Parts (1)
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Number |
Date |
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Parent |
237982 |
Mar 1972 |
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