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Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds
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Abstract
A process for the photochemically induced polymerization of a monomer or at least two different monomers in the presence of a metal compound as catalyst, the monomer(s) being selected from norbornene and norbornene derivatives, which is characterized in comprising: the photochemically ring opening displacement polymerization reaction being carried out in the presence of 0.001 to 20 mole fraction (based on the amount of monomer(s)) of at least a heat-stable ruthenium or osmium compound of the formula (II), in which ruthenium or osmium; L1 is a photolabile ligand selected from the group consisting of nitrogen; monocyclic, polycyclic and fused arenes having 6 to 24 C-atoms which are unsubstituted or substituted by substituents, from the group consisting of OH, C1-C4-alkyl, C1-C4-alkoxy, C6-C12-aryl or halogen; C1-C22- aliphatic, cycloaliphatic, aryl or aroaliphaticnitrile, which is substituted by C1-C4-alkoxy or halogen.
TW083106447A1993-09-101994-07-15Polymerization method of norbornene and norbornene derivatives and polymerized composition thereof
TW353075B
(en)
Transition metal complex, process for producing the same, olefin polymerization catalyst containing the transition metal complex and process for producing olefin polymers
Titanium catalyst component, process for its preparation, catalyst for producing ethylenic polymer containing said titanium catalyst component, and process for producing ethylenic polymer