Peroxide curable butyl formulations
View Patent ↗The present invention relates to a peroxide curable rubber compound comprising at least one elastomeric polymer comprising repeating units derived from at least one C 4 to C 7 isomonoolefin monomer, at least one C 4 to C 14 multiolefin monomer and at least one m- or p-alkylstyrene monomer.
1. A compound comprising:
a. at least one elastomeric polymer comprising repeating units derived from at least one C 4 to C 7 isomonoolefin monomer, at least one C 4 to C 14 multiolefin monomer, and at least one p-or m-alkylstyrene monomer,
b. a peroxide curing system.
2. A compound according to claim 1 , wherein the at least one C 4 to C 7 isomonoolefin monomer is selected from the group consisting of isobutylene, 2-methyl-1-butene, 3-methyl-1-butene, 2-methyl-2-butene and mixtures thereof.
3. A compound according to claim 1 , wherein the at least one C 4 to C 14 multiolefin monomer is selected from the group consisting of isoprene, butadiene, 2-methylbutadiene, 2,4-dimethylbutadiene, piperyline, 3-methyl-1,3-pentadiene, 2,4-hexadiene, 2-neopentylbutadiene, 2-methyl-1,5-hexadiene, 2,5-dimethyl-2,4-hexadiene, 2-methyl-1,4-pentadiene, 2-methyl-1,6-heptadiene, cyclopentadiene, methylcyclopentadiene, cyclohexadien and mixtures thereof.
4. A compound according to claim 1 , wherein the at least one alkylstyrene monomer is selected from the group consisting of p- or m-methylstyrene, p- or m-ethylstyrene and 4- or 3-n-propylstyrene.
5. A compound according to claim 1 , wherein the peroxide system is an organic peroxide.
6. A compound according to claim 1 further comprising at least one filler.
7. A shaped article comprising a compound according to claim 1 .
8. An article according to claim 7 in the form of a medical device or a condenser cap.
9. A medical device comprising an article comprising a compound according to claim 1 .
10. A fuel cell comprising an article according to claim 1 .
11. A compound comprising
a. at least one elastomeric polymer comprising repeating units derived from at least one C 4 to C 7 isomonoolefin monomer, at least one C 4 to C 14 multiolefin monomer, and at least one p- or m-alkylstyrene monomer,
b. a peroxide curing system, and
c. at least one filler, and
wherein the elastomeric polymer does not contain a vinyl aromatic or a polyfunctional monomer cross-linking agent.
12. A compound according to claim 11 wherein the at least one C 4 to C 7 isomonoolefin monomer is selected from the group consisting of isobutylene, 2-methyl-1-butene, 2-methyl-2-butene and mixtures thereof.
13. A compound according to claim 11 wherein the at least one C 4 to C 14 multiolefln monomer is selected from the group consisting of isoprene, butadiene, 2-methylbutadiene, 2,4-dimethylbutadiene, piperyline, 3-methyl-1,3-pentadiene, 2,4-hexadiene, 2-neopentylbutadiene, 2-methyl-1,5-hexadiene, 2 ,5-dimethyl-2,4-hexadiene, 2-methyl-1,4-pentadiefle, 2-methyl-1,6-heptadiene, cyclopentadiene, methylcylopentadiene, cyclohexadiefle and mixtures thereof.
14. A compound according to claim 11 wherein the at least one alkyistyrene monomer is selected from the group consisting of p- or m-methylstyrene, p- or m-ethylstyrene and 4- or 3-n-propylstyrene.
15. A compound according to claim 11 , wherein the peroxide system is an organic peroxide.
16. A shaped article comprising a compound according to claim 11 .
17. An article according to claim 16 in the form of a medical device or a condenser cap.
18. A medical device comprising an article comprising a compound according to claim 11 .
19. A fuel cell comprising an article according to claim 11 .