Cyclic ketone peroxide composition
View Patent ↗A composition comprising at least two trimeric cyclic ketone peroxides: a trimeric cyclic methyl ethyl ketone peroxide (3MEK-cp) of formula (I) and at least one peroxide satisfying formula (II) wherein R 1 through R 3 are independently selected from alkyl and alkoxyalkyl groups, said groups having 2 to 5 carbon atoms, the total number of carbon plus oxygen atoms of R 1 −R 2 +R 3 is in the range 7-15, and the molar ratio of 3MEK-cp to the total amount of peroxides satisfying formula (II) being in the range of from 10:90 to 80:20.
1. A composition comprising at least two trimeric cyclic ketone peroxides: a trimeric cyclic methyl ethyl ketone peroxide (3MEK-cp) of formula (I)
and at least one peroxide satisfying formula (II)
wherein R 1 through R 3 are independently selected from alkyl and alkoxyalkyl groups, said groups having 2 to 5 carbon atoms, the total number of carbon plus oxygen atoms of R 1 +R 2 +R 3 is in the range 7-15, and the molar ratio of 3MEK-cp to the total amount of peroxides satisfying formula (II) being in the range of from 10:90 to 80:20.
2. The composition according to claim 1 wherein R 1 through R 3 are alkyl groups having 2 to 5 carbon atoms, the total number of carbon atoms of R 1 +R 2 +R 3 is in the range 7-15.
3. The composition according to claim 2 wherein the alkyl groups are linear alkyl groups.
4. The composition according to claim 1 wherein the molar ratio of 3MEK-cp to the total amount of peroxides satisfying formula (II) is in the range of from 40:60 to 80:20.
5. The composition according to claim 1 wherein the composition further comprises a diluent in an amount of 45-85 wt %, based on the weight of the composition.
6. The composition according to claim 1 wherein the total amount of trimeric cyclic ketone peroxides according to formulae (I) and (II) is in the range 15-55 wt %, based on the weight of the composition.
7. The composition according to claim 1 wherein at least one of the peroxides satisfying formula (II) is 3,6-diethyl-3,6,9-trimethyl-9-(n-propyl)-1,2,4,5,7,8-hexaoxonane.
8. The composition according to claim 1 wherein at least one of the peroxides satisfying formula (II) is 3-ethyl-3,6,9-trimethyl-6,9-di(n-propyl)-1,2,4,5,7,8-hexaoxonane.
9. The composition according to claim 1 wherein at least one of the peroxides satisfying formula (II) is 3,6,9-tri(n-propyl)-3,6,9-trimethyl-1,2,4,5,7,8-hexaoxonane.
10. A process for preparing a cyclic ketone peroxide composition, the method comprising reacting, in the presence of acid, hydrogen peroxide with a mixture of ketones comprising methyl ethyl ketone (MEK) and at least one ketone of formula CH 3 —C(═O)—R wherein R is an alkyl group with 3 to 5 carbon atoms or an alkoxyalkyl group with 2 to 5 carbon atoms, the molar ratio of MEK to the total amount of ketones of formula CH 3 —C(═O)—R being in the range 25:75 to 95:5.
11. The process according to claim 10 , wherein R is an alkyl group.
12. The process according to claim 11 , wherein R is n-propyl.
13. The process according to claim 10 , wherein the molar ratio of MEK to the total amount of ketones of formula CH 3 —C(═O)—R is in the range of from 50:50 to 70:30.
14. A peroxide composition obtained by the process of claim 10 .
15. The process of claim 13 wherein R is an alkyl group with 3 to 5 carbon atoms.
16. The process of claim 13 wherein R is n-propyl.
17. The peroxide composition of claim 14 wherein R is an alkyl group with 3 to 5 carbon atoms.
18. The peroxide composition of claim 14 wherein R is n-propyl.
19. The peroxide composition of claim 14 wherein the molar ratio of MEK to the total amount of ketones of formula CH 3 —C(═O)—R is in the range of from 50:50 to 70:30.