Thermoplastic dicyclopentadiene-base open-ring polymers prepared by the ring-opening polymerization of a monomer component comprising a dicyclopentadiene monomer, characterized in that the polycyclic repeating units account for at least 50 mole % of the total amount of the repeating units and are bonded with a cis configuration to the carbon-carbon double bonds of the main chain and that the content of low-molecular components having molecular weights of 2,000 or below is 10 wt.% or below based on the whole of the polymer; and hydrogenated derivatives thereof prepared by hydrogenating the carbon-carbon unsaturated bonds of the thermoplastic dicyclopentadiene-base open-ring polymers.

Thermoplastic dicyclopentadiene-base open-ring polymers, hydrogenated derivatives thereof, and processes for the preparation of both

Methods for synthesizing polyDCPD via ROMP of low grade DCPD starting materials using Ruthenium or Osmium carbene complex catalyst. Transparent or translucent polyDCPD materials. The Ruthenium or Osmium carbene complex catalysts having formula (I), where M may be Os or Ru; R and R1 may be the same or different and may be hydrogen or substituent group including C?2?-C20 alkenyl, C2-C20 alkynyl, C1-C20 alkyl, aryl, C1-C20 carboxylate, C1-C20 alkoxy, C2-C20 alkenyloxy, C2-C20 alkynyloxy, aryloxy, C2-C20 alkoxycarbonyl, C1-C20 alkylthio, C1-C20 alkylsulfonyl and C1-C20 alkylsulfinyl; X and X?1? may be the same or different and may be any anionic ligand; and L and L1 may be the same or different and may be neutral electron donor. The low grade DCPD starting materials containing less than about 97 % by weight of DCPD monomers.

Polymerization of low grade dcpd monomers using an olefin metathesis catalyst

A crosslinkable resin composition is disclosed which can be a forming material having excellent adhesion to metals and excellent heat resistance. The crosslinkable resin composition contains a cycloolefin resin (A) obtained through metathesis polymerization of a cycloolefin monomer in the presence of a compound having two or more vinyl groups in the molecule, and a radical initiator (B). A crosslinked resin formed body is obtained by crosslinking such a crosslinkable resin composition through heating.

Crosslinkable resin composition and resin formed body produced therefrom

The invention relates to a norbornene polymer containing repeating units formed from a norbornene monomer in its main chain and having a weight average molecular weight (Mw) ranging from 10,000 to 1,000,000 and a ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) ranging from 1.60 to 1.95, and a production process thereof.

Norbornene polymer and process for preparing the same

The invention provides polymerizable compositions capable of giving molded articles of crosslinked cycloolefin resins and crosslinked cycloolefin resin composite materials which are excellent in heat resistance; and molded articles produced by using the compositions, more specifically, a polymerizable composition comprising a cycloolefin mixture containing 01 to 50 % by mole of a cycloolefin bearing as the substituent a monovalent atomic group having an aliphatic carbon-carbon unsaturated bond, a metathesis polymerization catalyst, and a radical generator; and molded articles produced by using a polymerizable composition described above which preferably further contains a chain transfer agent and making the cycloolefin mixture undergo at least ring-opening polymerization

Polymerizable compositions and molded articles produced by using the same

PURPOSE: To delay pot life of a reaction solution and shorten curing time in a metallic mold by using respective specific metathetic catalyst system and pot life regulator in carrying out bulk ring opening polymerization of a norbornene-based monomer mixture. CONSTITUTION: A norbornene-based monomer mixture of tri- or polymers containing tricyclopentadiene is subjected to bulk ring opening polymerization in the presence of a molybdenum-based metathetic catalyst (e.g. tridodecylammonium molybdate) and a cocatalyst (e.g. an alkylaluminum halide) using 5-alkenyl-2-norbornenes (preferably 5-vinylbicyclo[2.2.1]hept-2-ene, etc.) as a pot life regulator of the reaction solution. Furthermore, the reaction is normally carried out in a metallic mold and the metallic mold temperature is preferably 50-120°C at that time. The mold clamping pressure may be normally 0.1-100kg/cm 2 . COPYRIGHT: (C)1991,JPO&Japio

Production of norbornene-based polymer

PURPOSE: To obtain the aimed high-purity substance capable of reaction injection molding, by purifying crude dicyclopentadiene through distillation in the presence of an antioxidant in the respective divided steps for removing low-boiling impurities and high-boiling impurities. CONSTITUTION: Crude dicyclopentadiene is purified by distillation. In the process, the distillation is carried out in the presence of an antioxidant in an amount of ≥200ppm, preferably 500W10,000ppm based on the amount of the fed raw material at ≤120°C in distillation columns in the respective divided steps of (A) a step for removing low-boiling impurities and (B) a step for removing high-boiling impurities. The step (A) is carried out at 80W120°C column bottom temperature under 20W150torr vacuum degree and the step (B) is conducted at 70W120°C under 10W100torr vacuum degree. Packed columns are preferred as the distillation columns. A sublimable antioxidant, e.g. 2,6-di-tert-butylphenol, etc., is preferred as the antioxidant and fed into the raw material or reflux liquid so as to be present in the whole columns. COPYRIGHT: (C)1988,JPO&Japio

Purification of dicyclopentadiene

Bulk polymerization reaction mixture

PURPOSE:To obtain the titled highly active monomer without purification on purpose, capable of giving thermosetting resins having high heat distortion temperature, etc. when subjected to reaction injection molding, by heat treatment of a dicyclopentadiene at specified temperatures. CONSTITUTION:A dicyclopentadiene is heat-treated, pref. in the presence of 100-1,000ppm of an antioxidant (e.g., 4,4-dioxydiphenyl), followed by, if required, mixing a norbornene monomer, thus obtaining the objective monomer.

Production of monomer for ring opening polymerization

PURPOSE:To obtain a thermosetting resin outstanding in flexural modulus etc with no decrease in heat distortion temperature, by incorporating a norbornene monomer with a specified amount of a dicyclopentadiene-based thermally polymerized resin followed by bulk polymerization in the presence of a metathesis catalytic system CONSTITUTION:The objective thermosetting resin can be obtained by incorporating, in a mold, (A) a norbornene monomer (B) in the presence of a metathesis catalytic system, with (C) 15-150ptswt per 100ptswt of the component A, of a dicyclopentadiene-based thermally polymerized resin (pref, dicyclopentadiene polymer) followed by bulk polymerization

Okumura Kinichi

Papers

Production of norbornene-based polymer

Purification of dicyclopentadiene

Bulk polymerization reaction mixture

Production of monomer for ring opening polymerization

Production of thermosetting resin