Abstract:
PROBLEM TO BE SOLVED: To provide a cycloolefinic copolymer which is crosslinkable and capable of giving excellent properties in heat resistance, transparency, chemical resistance, solvent resistance, bonding and adhesion, its composite material, these erosslinked materials and optical materials using them. SOLUTION: The cycloolefinic copolymer obtained by addition polymerization of a cycloolefin having specific crosslinkable functional groups and other cycloolefins, providing the weight average molecular weight of 3,000-1,500,000, the composite material prepared by compounding this copolymer with a specific metal oxide, these crosslinked materials and the optical materials using them are obtained.
Abstract:
PROBLEM TO BE SOLVED: To efficiently eliminate the catalyst from a cycloolefin addition (co)polymer prepared by the addition polymerization of a specific cycloolefin compound in the presence of an addition polymerization catalyst containing a nickel or cobalt compound. SOLUTION: A specific cycloolefin compound alone or together with an α-olefin monomer copolymerizable therewith is subjected to addition polymerization in the presence of an addition polymerization catalyst containing a nickel compound and/or a cobalt compound to give a cyeloolefin addition (co)polymer having a glass transition point higher than of 200 deg.C. A solution of the (co)polymer is treated with an organic acid and water and then, if necessary, with a 1-12C alcohol compound; then, the catalyst component is removed by transferring it from the solution to an aqueous solution (aqueous phase).
Abstract:
PROBLEM TO BE SOLVED: To provide a cyclic olefinic polymer or its composition having an alkoxysilane functional group, excellent in heat resistance, optical properties, solvent resistance, adhesive properties to metals and inorganic materials, and suitable as an optical material, a coating agent and a binder, and to provide a crosslinked object of the same obtained by forming a siloxane linkage. SOLUTION: The cyclic olefinic polymer composition is obtained by formulating a specific tin compound to a cyclic olefinic polymer having an alkoxysilane functional group or to a composition including the cyclic olefinic polymer. The crosslinked object and the method of producing the same comprise using the composition and crosslinking it by forming a siloxane linkage.
Abstract:
PROBLEM TO BE SOLVED: To provide a optically transparent, heat-resistant, adhesive and crosslinkable optical material having excellent solvent resistance and provide a liquid crystal display substrate material produced by using the optical material. SOLUTION: The optically transparent material contains a cycloolefin copolymer containing (a) a repeating unit derived from a specific cycloolefin and (b) a repeating unit having an alkoxysilyl group or aryloxysilyl group derived from specific other cycloolefin or hydrolyzed condensed residue of the above groups and the liquid crystal display substrate material contains the optically transparent material. Preferably, the repeating unit (a) contains a specific amount of a repeating unit having a norbornene substituted with a 3-8C alkyl group as a structural unit and/or a specific amount of a repeating unit containing ester group or imide group as at least one of the substituent group of the cycloolefin. The ratio of the repeating unit (a) to (b) is preferably within a specific range.
Abstract:
PROBLEM TO BE SOLVED: To provide a production method whereby high-melting-point crystalline 1,2-polybutadiene can be produced even at a high polymerization temperature. SOLUTION: In a method for producing crystalline 1,2-polybutadiene by conducting polymerization in the presence of a catalyst comprising a cobalt complex, an organoaluminumoxy compound, and an organoaluminum compound, the organoaluminumoxy compound is a modified one containing toluene- insolubles.
Abstract:
PROBLEM TO BE SOLVED: To provide an additive copolymer of norbornene (bicyclo[2.2.1]hept-2-ene) and a cyclic olefin-based compound, which is excellent in heat resistance, transparency, adhesion or close fitting property to other members, low in linear expansion coefficient related to dimensional stability, and uniformly soluble to a general solvent to form a transparent solution. SOLUTION: The cyclic olefin-based additive copolymer includes 70-98 mol% of a specific structural unit (a) derived from norbornene; and 2-20 mol% of a specific structural unit (b) derived from a cyclic olefin-based compound containing silicon atom, in the total structural unit, and has a number-average molecular weight of 30,000-300,000. When the copolymer is dissolved in toluene or cyclohexane at 10 wt.% concentration at 25°C, the insoluble content is 0.1 wt.% or less, and the transmittance at wavelength 400 nm of the toluene or cyclohexane solution is 85% or more based on measurement by a quartz cell with optical path length of 1 cm. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a crosslinked resin film having an optical transparency, heat resistance, liquid crystal resistance, dimensional stability and adhesion which can be used as a substitute of a substrate glass in a liquid crystal display device and EL display device or a polarization film, surface protective film, retardation film, transparent conductive film, light diffusion film, film for EL display device, antireflection film or the like in these devices. SOLUTION: The film is obtained by molding a composition which contains a cyclic olefin addition type copolymer having a specific reactive silyl group, and if necessary, the organosilanes and metal oxides or the like, and then crosslinking the film with siloxane bond. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a norbornene-based addition copolymer having excellent heat resistance, being excellent in transparency and toughness, melt-moldable and suitably used as an optical material; a process for producing the addition copolymer; and a film or sheet prepared by molding the addition copolymer. SOLUTION: The norbornene-based addition copolymer of the invention has a structural unit derived from bicyclo[2.2.1]hepta-2-ene and a structural unit derived from bicyclo[2.2.1]hepta-2-ene having a ≥6C alkyl substituent at a specific proportion. In a wide angle X-ray scattering (WAXS) pattern for the addition copolymer, 2θ of a lower angle peak of the measured two peaks is 10° or greater. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a cyclic olefin resin composition that retains desirable transparency, heat resistance and mechanical properties inherent in a specific cyclic olefin addition (co)polymer and exhibits excellent flame retardancy by compounding the cyclic olefin addition (co)polymer and a specific flame-retardant into a composite. SOLUTION: The cyclic olefin resin composition comprises 100 pts.wt. of the cyclic olefin addition (co)polymer [I] obtained by addition polymerization of a monomer containing the specific cyclic olefin compound and 2-40 pts.wt. of the specific condensed phosphate ester compound [II]. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a cycloolefin-based addition polymer, capable of producing at a high yield the cycloolefin-based addition polymer having little remaining catalyst amount in the polymer and weight-average molecular weight controlled in the range of 50,000-500,000, easy in molding a film or sheet by a solution casting method using an aromatic hydrocarbon solvent, excellent in heat resistance and optical properties. SOLUTION: The method for producing a cycloolefin-based addition polymer comprises addition polymerization of monomers comprising at least one cycloolefin-based compound to produce a cycloolefin-based addition polymer having 50,000-500,000 weight-average molecular weight in the presence of a multicomponent catalyst comprising a specific palladium compound, a phosphine compound and an ionic boron compound or ionic aluminium compound, and a compound having a cyclopentene ring. COPYRIGHT: (C)2007,JPO&INPIT