PROCESS FOR PRODUCING CYCLOOLEFIN ADDITION POLYMER

摘要

[MEANS FOR SOLVING PROBLEMS] There is provided a process for producing a cycloolefin addition polymer, characterized in that an addition polymerization of monomers containing a given cycloolefin compound is carried out in the presence of ethylene and a multicomponent catalyst, the multicomponent catalyst containing as essential components (a) palladium compound, (b) compound selected from among ionic boron compounds, ionic aluminum compounds and Lewis-acid aluminum and Lewis-acid boron compounds and (c) given phosphine compound or phosphonium salt thereof. [EFFECT] A cycloolefin addition polymer of a molecular weight range suitable for optical material sheets and films can be produced with the use of small amounts of molecular weight modifier and palladium catalyst by carrying out an addition polymerization of cycloolefin compound in the presence of given palladium catalyst and, as a molecular weight modifier, ethylene.