Birch, Stewart, Kolasch & Birch,LLP
Polymer containing a modified cyclic monomer unit
 Disclosed is a polymer containing a modified cyclic monomer unit, comprising a polymer chain represented by the following formula (I): ##STR1## wherein A to F are monomer units constituting a main chain of the polymer chain, in which monomer units A to F are arranged in any order, and l to q are, respectively, weight percentages of monomer units A to F, based on the total weight of monomer units A to F; A is selected from cyclic olefin monomer units, B is selected from cyclic conjugated diene monomer units, and C to F are monomer units copolymerizable with monomer units A and B, wherein each of S to X, which are modifying groups, is a functional group or an organic compound residue containing the functional group, with the functional group containing at least one member selected from oxygen, nitrogen, sulfur, silicon, phosphorus and halogen; and wherein s to x are, respectively, weight percentages of modifying groups S to X, based on the weight of the polymer, and wherein the polymer has a number average molecular weight of from 10,000 to 5,000,000. The modified polymer of the present invention has excellent thermal properties, and is also advantageous in that it can be provided in the form of a modified copolymer of a cyclic olefin monomer and/or a cyclic conjugated diene monomer with a comonomer copolymerizable with the cyclic monomer, wherein the content of comonomer and the configuration of the copolymer can be appropriately selected in accordance with desired thermal and mechanical properties. 
Asahi Kasei Kogyo Kabushiki Kaisha
C C C C C
C08F C08L C08F C08F C08F
inventional inventional inventional inventional inventional
Hideyuki Kimio Itaru Kiyoo
Yamagishi Imaizumi Natori Kato