For example , in some embodiments , the golf ball core may be formed primarily of rubber , such as a diene - containing composition , or metal locene catalyZed polyole ? n .
crosslinked or cured ( vulcanized ) .
In some embodiments , the golf ball core may be formed primarily of rubber , such as a diene - containing composition , or metal locene catalyZed polyole ? n .
crosslinked or cured ( vulcanized ) .