Abstract:
PROBLEM TO BE SOLVED: To provide a cycloolefinic resin composition which is capable of forming a crosslink or a quasi-crosslink due to a carboxylic group generated in the molecule of a commercially producible cycloolefinic addition polymer under a specific condition. SOLUTION: The cycloolefinic resin composition contains component A which is a cycloolefinic addition polymer obtained by addition-polymerizing a cycloolefinic monomer having a -(CHR 2 ) k -C(O)OR 1 group (wherein, R 1 is a trialkylsilyl group containing at least one 1-15C alkyl group, cycloalkyl group or aryl group or 2-10C alkyl group; R 2 is a hydrogen atom, a 1-10C alkyl group, a cycloalkyl group or an aryl group; and k is an integer of 0-5) and a cycloolefinic monomer not having such a group and component B which is a thermo acid generator generating an acid at ≥50°C. The method of treatment of the molding comprises bringing the molding containing the resin composition into contact with water or steam with a temperature of ≥90°C. The film and the sheet are obtained by the method. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a cycloolefin copolymer in which a structural unit (a) derived from a specific cycloolefin compound having a methoxysilyl group and a structural unit (b) derived from another cycloolefin compound are randomly arranged in a uniform composition distribution, wherein the copolymer has good optical transparency and heat resistance and a small coefficient of linear expansion and is used as a suitable material for a sheet or film for an optical material, and to provide a crosslinked cycloolefin copolymer obtained by crosslinking the copolymer and methods for producing these copolymers. SOLUTION: The cycloolefin addition copolymer comprises 70-98 mol% of a structural unit (a) derived from bicyclo[2.2.1]hept-2-ene and 2-20 mol% of a structural unit (b) derived from a specific cycloolefin compound having a methoxysilyl group, wherein the copolymer has a number average molecular weight of 30,000-300,000 and is soluble in toluene and cyclohexane at 25°C. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To obtain an optically transparent material (transparent resin film) which has excellent optical transparency, heat resistance and is improved in problems such as dimensional stability, adhesiveness, solvent and chemical resistances, brittleness and easy breaking of the film. SOLUTION: The optically transparent material contains a cycloolefinic addition copolymer having a specific reactive silyl group represented by structural formulas (1) and (2), [in formula (1) A 1 to A 4 are each independently a hydrogen atom, halogen atom, 1-20C alkyl group, alkenyl group, cycloalkyl group, aryl group or reactive silyl group represented by formula (2) and at least one of the A 1 to A 4 is the reactive silyl group; X is -CH 2 - or -O-; m is 0 or 1]. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To obtain a cyclic olefin with a reactive silyl group which maintains adhesiveness and crosslinking performance as a crosslinking point in the reactive silyl group, prevents inhibiting polymerization in the polymerizing process, decomposing in the catalyst-removing process and producing a gelled polymer, and provides a polymer good in preservation stability as a polymer solution. SOLUTION: The cyclic olefin has the reactive silyl group represented by formula (1) [wherein, at least one of A to A is the reactive silyl group represented by formula (2)].
Abstract:
PROBLEM TO BE SOLVED: To provide a liquid crystal oriented film-formed substrate having good heat resistance, solvent resistance and dimensional stability and excellent in transparency, and to provide a liquid crystal display element using the same. SOLUTION: This liquid crystal oriented film-formed substrate comprises a cyclic olefin-based copolymer containing a recurring unit of cyclic olefin having alkoxysilyl group or its hydrolyzed/condensed residue (a), a recurring unit of other cyclic olefin than the above one (b) and, if necessary, a recurring unit represented by CH2 -CHR (c), wherein the cyclic olefin-based copolymer has 1,000-1,000,000 number-average molecular weight and comprises a crosslinked product crosslinked with siloxane bond. The liquid crystal display element is provided by using the substrate.
Abstract:
PROBLEM TO BE SOLVED: To provide a norbornene-based cyclic olefin addition polymer, modified in a molecular weight, and having an aromatic substituent at an end of a molecular chain. SOLUTION: When addition-polymerizing a cyclic olefin in a hydrocarbon solvent in the presence of (i) a compound component containing a transition metal of the 8-10 group in the periodic table, (ii) a strong Bronsted acid compound and/or a Lewis acid compound, and (iii) a polymerization catalyst containing an organoaluminium component, at least one kind of aromatic vinyl compound is added as a chain-transfer agent to produce the cyclic olefin addition polymer.
Abstract:
PROBLEM TO BE SOLVED: To obtain an imide group-containing cyclic olefin-based (co)polymer together having excellent optical transparency, heat resistance, and adhesiveness, and useful as an optical material, adhesive, and coating agent, and to obtain a composite material given by using the same. SOLUTION: The imide group-containing cyclic olefin-based (co)polymer contains a repeating unit (a) expressed by formula (1) and has a weight-average molecular weight of 5,000-1,000,000. The composite material contains the (co)polymer together with silica and/or alumina.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a norbornene type cyclic olefin addition polymer with the polymerization activity having a controlled molecular weight and a narrow molecular weight distribution. SOLUTION: One or more norbornene type cyclic olefins are subjected to addition polymerization in the presence of a polymerization catalyst comprising a component of a group VIII-X transition metal compound of the Periodic Table, wherein at least one type of a cyclic nonconjugated polyene is added to polymerize as a molecular weight regulator.
Abstract:
PROBLEM TO BE SOLVED: To obtain a heat-resistant resin composition having excellent thermal aging resistance and especially suitable as a liquid crystal substrate material, a semiconductor coating material and an adhesive for lens by compounding a cyclic olefin (co)polymer with a combination of specific antioxidants. SOLUTION: The heat-resistant resin composition contains (A) a specific cyclic olefin (co)polymer and (B) at least one kind of antioxidant selected from (b-1) a phenolic antioxidant, (b-2) a phosphorus-based antioxidant and (b-3) a thioether-based antioxidant.
Abstract:
PROBLEM TO BE SOLVED: To obtain a cycloolefin copolymer and an optical material both excellent in optical characteristics, heat resistance, adhesiveness, tightly contacting properties, and resistance to moisture absorption. SOLUTION: The cycloolefin copolymer contains repeating units represented by formula (1) and repeating units represented by formula (2) and has a number average mol.wt. (in terms of polystyrene) of 10,000-1,000,000.