Process and composition for inhibiting the polymerization of cyclopentadiene compounds
View Patent ↗A process for inhibiting the polymerization of cyclopentadiene compounds (B) by contacting the cyclopentadiene compound with a quinone methide compound (A) of structure (I), Compositions (AB) comprising (A) and (B) are also provided.
1. A composition (AB), comprising:
a cyclopentadiene compound (B), and
a compound (A) of structure (I):
wherein
R 1 and R 2 are each tert-butyl; and
R 3 is —CN, —O—R 10 , or —R 12 , where R 10 is methyl, ethyl, n-propyl, iso-propyl, n-butyl, n-pentyl, or n-hexyl and R 12 is 2-furyl, 3-furyl, or phenyl.
2. The composition (AB) according to claim 1 , wherein the cyclopentadiene compound (B) is at least one selected from the group consisting of cyclopentadiene, dicyclopentadiene, alkylated cyclopentadiene and alkylated dicyclopentadiene.
3. The composition (AB) according to claim 1 , wherein the cyclopentadiene compound (B) is at least one of cyclopentadiene and dicyclopentadiene.
4. The composition (AB) according to claim 1 , wherein a concentration of the compound (A) of structure (I) is between 10 ppb (m/m) and 100,000 ppm (m/m), based on a total weight of the cyclopentadiene compound (B).
5. The composition (AB) according to claim 1 , wherein, in the structure (I), R 3 is —O—R 10 , where R 10 is methyl.
6. The composition (AB) according to claim 1 , wherein, in the structure (I), R 3 is —O—R 10 , where R 10 is ethyl.
7. The composition (AB) according to claim 1 , wherein, in the structure (I), R 3 is —O—R 10 , where R 10 is n-propyl.
8. The composition (AB) according to claim 1 , wherein, in the structure (I), R 3 is —O—R 10 , where R 10 is iso-propyl.
9. The composition (AB) according to claim 1 , wherein, in the structure (I), R 3 is —O—R 10 , where R 10 is n-butyl.
10. The composition (AB) according to claim 1 , wherein, in the structure (I), R 3 is —O—R 10 , where R 10 is n-pentyl.
11. The composition (AB) according to claim 1 , wherein, in the structure (I), R 3 is —O—R 10 , where R 10 is n-hexyl.
12. The composition (AB) according to claim 1 , wherein, in the structure (I), R 3 is —R 12 , where R 12 is 2-furyl.
13. The composition (AB) according to claim 1 , wherein, in the structure (I), R 3 is —R 12 , where R 12 is 3-furyl.
14. The composition (AB) according to claim 1 , wherein, in the structure (I), R 3 is —R 12 , where R 12 is phenyl.
15. The composition (AB) according to claim 1 , wherein, in the structure (I), R 3 is —CN.