A high flash point cycloolefin composition, including at least 50% by weight dicyclopentadiene, the composition having a flash point of greater than 100.degree. F. and a viscosity of from about 3 cps to about 3000 cps at about 70.degree. F. and about 1 atmosphere pressure. The cycloolefin composition is used in a method of preparation of cycloolefin for polymerization by metathesis catalysis to form a substantially crosslinked thermoset polymer by: distilling the cycloolefin to form distilled cycloolefin, and contacting the distilled cycloolefin and an adsorbant.
                            一种高闪点环氧烯组合物,包括至少50%重量的二
环戊二烯,该组合物的闪点大于100华氏度,粘度约为3厘泊至3000厘泊,在大约70华氏度和大约1大气压下。环氧烯组合物用于通过交换催化聚合制备环氧烯的方法,以形成基本交联的热固性聚合物:蒸馏环氧烯以形成蒸馏的环氧烯,并与蒸馏的环氧烯和吸附剂接触。