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    • 8. 发明专利
    • POLYMERIZATION METHOD
    • JP2000256443A
    • 2000-09-19
    • JP5837499
    • 1999-03-05
    • HITACHI CHEMICAL CO LTD
    • MARUYAMA KOJIKATOGI SHIGEKIYUSA MASAMI
    • C08G61/08
    • PROBLEM TO BE SOLVED: To temporarily restrain activity of a metathesis polymerization catalyst and to facilitate the handling of the catalyst during polymerization reaction by deactivating the metathesis polymerization catalyst by mixing a coordinative compound having a nitrogen atom with the catalyst and then mixing a metathesis-polymerizable compound with the catalyst to reactivate the catalyst for polymerization. SOLUTION: The metathesis polymerization catalyst represented by formula I and/or II is deactivated by being mixed with a coordnative compound having a nitrogen atom (wherein M is Ru or Os; R and R1 are each H, a 1-20C alkyl group, 2-20C alkenyl group, aryl group, 1-20C carboxylate group, 1-20C alkoxy group, 2-20C alkenylthioxy group, aryloxy group or the like; X and X1 are each an anionic coordinating group; and L and L1 are each a neutral electron donative group). The deactivated catalyst is mixed with a metathesis polymerizable compound and the liquid mixture is heated up to a temperature of not lower than 50 deg.C which is however not higher than a decomposition temperature of the catalyst in order to reactivate the catalyst for polymerizing the metathesis polymerizable compound.
    • 9. 发明专利
    • RING-OPENING POLYMER
    • JP2000103842A
    • 2000-04-11
    • JP27634098
    • 1998-09-30
    • HITACHI CHEMICAL CO LTD
    • YUSA MASAMIKATOGI SHIGEKIKIKUCHI NOBURU
    • C08G61/08
    • PROBLEM TO BE SOLVED: To provide a polymer of a norbornene type which has acid anhydride groups and a dispersity, defined by the ratio of wt, average mol.wt. to number average mol.wt., of a specified value and can be modified with a compd. reactive with an acid anhydride group. SOLUTION: This polymer has a dispersity of 1.5 or lower, is represented by formula I, and is obtd. by the ring-opening metathesis polymn. of exo-5- norbornene-2,3-dicarboxylic anhydride. A complex catalyst of formula II contg. a transition metal is used in the ring-opening metathesis polymn. In formula II, M is ruthenium or osmium; X and X1 are each an anionic ligand; L and L1 are each a neutral electron-donating group; and R and R1 are each H or an optionally substd. alkyl or arom. group. The catalyst is used usually in an amt. of 0.0001-20 wt.% of the monomer, The reaction temp. is usually -50 deg.C to 150 deg.C, This polymer can be reacted with a compd. having a photosensitive group to give a photosensitive resin or can be reacted with an epoxy resin to produce a three-dimensional structure.
    • 10. 发明专利
    • PRODUCTION OF CYCLO-OLEFIN POLYMER
    • JP2000072857A
    • 2000-03-07
    • JP24445898
    • 1998-08-31
    • HITACHI CHEMICAL CO LTD
    • YUSA MASAMIKATOGI SHIGEKIKIKUCHI NOBURU
    • C08G61/06
    • PROBLEM TO BE SOLVED: To obtain a cyclo-olefin polymer having a desired molecular weight that can reduce the amount of unreacting monomer, can control its molecular weight with a reduced amount of a catalyst by admixing a metathesis polymerization catalyst and a metathesis polymerizable cyclo-olefin to the reaction system and allowing them to react with each other. SOLUTION: The objective polymer is obtained by introducing (A) a metathesis catalyst, preferably represented by formula I [M is ruthenium or the like; X and X1 are each an anionic ligand; L and L1 are each a neutral electron donor; R and R1 are each H, a (substituted) alkyl or the like] (for example, ruthenium carbene catalyst of formula II), (B) a metathesis polymerizable cyclo- olefin, for example, 2-norbornene or the like and (C) a compound bearing one or more vinyl ester groups in its molecule (for example, vinyl acetate) into the reaction system and allowing them to react with each other in an organic solvent, for example, toluene or the like, preferably at 0-100 deg.C usually for 1 minute to 48 hours.