2,6,6-Trimethylbicyclo(3.1.1)hept-2-ene, polymer with 6,6-dimethyl-2-methylenebicyclo(3.1.1)heptane 31393-98-3 Bicyclo(3.1.1)hept-2-ene, 2,6,6-trimethyl-, polymer with 6,6-dimethyl-2-methylenebicyclo(3.1.1)heptane