Kawasaki, Japan
Kawasaki, Japan

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A polymerizable compound has a practical low melting point, excellent solubility in a general-purpose solvent, and can produce an optical film at low cost, exhibits low reflected luminance, and achieves uniform conversion of polarized light over a wide wavelength band, an optically anisotropic article. A carbonyl compound is useful as a raw material for producing the polymerizable compound. (In the formula (I), Y^(1 )to Y^(8 )represent C(O)O, G^(1 )and G^(2 )represent a C_(1-20 )divalent linear aliphatic group, Z^(1 )and Z^(2 )represent a C_(2-10 )alkenyl group that is unsubstituted, or substituted with a halogen atom, A^(x )represents a C_(2-30 )organic group with at least one aromatic ring, A^(y )represents a hydrogen atom or C_(1-20 )alkyl group, A^(1 )represents a trivalent aromatic group, A^(2 )and A^(3 )represent a C_(3-30 )divalent alicyclic hydrocarbon group, A^(4 )and A^(5 )represent a C_(6-30 )divalent aromatic group or the like, and Q^(1 )represents a hydrogen atom.)


Patent
Zeon Corporation | Date: 2016-12-07

A composite gas barrier layered body for an organic electroluminescent light-emitting element, including: a gas barrier layered body (A) having a film (a) of an alicyclic polyolefin resin and one or more inorganic barrier layers (a) directly provided on at least one surface of the film (a); a film (b) formed of an alicyclic polyolefin resin having a thickness that is equal to or less than a thickness of the film (a); and a heat-melting layer that is interposed between the inorganic barrier layer (a) and the film (b) to bond the inorganic barrier layer (a) to the film (b), wherein a glass transition temperature of the heat-melting layer is lower than a glass transition temperature of the alicyclic polyolefin resin constituting the film (a) and the film (b) by 25C or more; and production method therefor.


A nitrile group-containing copolymer rubber which has a hydroxyl group, carboxyl group, or carbon-carbon double bond at an end carbon atom or on a carbon atom which bonds with the end carbon atom is provided. The nitrile group-containing copolymer rubber of the present invention is preferably obtained by a metathesis reaction. According to the present invention, a nitrile group-containing copolymer rubber which is excellent in cross-linkability can be provided.


Patent
Zeon Corporation | Date: 2016-05-25

The present invention is a method for 2-fluorobutane to obtain highly purified 2-fluorobutane through a process comprising a step for: bringing crude 2-fluorobutane that includes 5 to 50 wt% of butene into contact with a brominating agent that can form a bromonium ion in an aprotic polar solvent in the presence of water or an alcohol having up to 4 carbon atoms; converting the butene into compounds having a boiling point higher than that of 2-fluorobutane. then recovering 2-fluorbutane from the reaction solution; and purifying the recovered 2-fluorabutane by distillation.


Patent
Zeon Corporation | Date: 2016-12-07

The present invention is a transparent pressure-sensitive adhesive sheet comprising a film that is formed of a hydrogenated block copolymer [D], and a layer that is formed of a transparent pressure-sensitive adhesive [E], the layer being formed on each side of the film,the hydrogenated block copolymer [D] being obtained by hydrogenating 90% or more of unsaturated bonds of a block copolymer [C] that comprises at least two polymer blocks [A] and at least one polymer block [B], the polymer block [A] comprising a repeating unit derived from an aromatic vinyl compound, the polymer block [B] comprising a repeating unit derived from a linear conjugated diene compound. The present invention provides a transparent pressure-sensitive adhesive sheet (double-sided, transparent pressure-sensitive adhesive sheet) that is used to bond two optical members (adherends), and exhibits excellent optical properties (transparency and low birefringence), adhesion, and reworkability


[Problem] To provide a cyclopentene ring-opening copolymer used in a rubber composition for tires having excellent wet grip performance and low heat buildup; and a method for producing the cyclopentene ring-opening copolymer. To further provide a rubber composition obtained by using the cyclopentene ring-opening copolymer. [Solution] This cyclopentene ring-opening copolymer comprises cyclopentene and a cyclic olefin containing an aromatic ring; the content of the aromatic ring with respect to the total weight of the copolymer is 10 to 40 wt%; and the weight average molecular weight (Mw) is 200,000 to 1,000,000. The cyclopentene ring-opening copolymer alternatively comprises cyclopentene and a norbornene compound; the weight ratio of cyclopentene-derived structural units to all repeating structural units in the copolymer is 40 to 90 wt%, and the weight ratio of norbornene compound-derived structural units is 10 to 60 wt%; and the weight average molecular weight (Mw) is 200,000 to 1,000,000.


A cross-linkable rubber composition for a seal material which is used at an oilfield or gas well comprising a nitrile group-containing copolymer rubber which contains ,-ethylenically unsaturated nitrile monomer units 10 to 60 wt % and has an iodine value of 120 or less, an ,-ethylenically unsaturated carboxylic acid metal salt (B), and an organic peroxide cross-linking agent (C) is provided. According to the present invention, it is possible to provide a rubber composition which is excellent in shapeability, is high in durability against hydrogen sulfide and other corrosive gases, and is suitable for application as a seal material which is used at an oilfield or gas well.


Patent
Zeon Corporation | Date: 2016-07-06

A photovoltaic device includes two or more layers of organic photoelectric conversion module base plates that are stacked and connected, and that each include one or more photoelectric conversion elements. From 20% to 80% of area of each of the organic photoelectric conversion module base plates is occupied by a photoelectric conversion element section.


This polymerizable compound is represented by a formula (I), this polymerizable composition contains said polymerizable compound and a polymerization initiator, this polymer is obtained by polymerizing the polymerizable compound or polymerizable composition, and this optically anisotropic product is comprised from the polymer. In the formula, each of Y^(1) to Y^(8) represents -O-, -S-, -O-C(=O)-, -C(=O)-O-, etc., Y^(a) represents -O-, -S-, -O-C(=O)-, -C(=O)-O-, etc., each of G^(1) and G^(2) represents a divalent linear aliphatic group having 1 to 20 carbon atoms, etc., each of Z^(1) and Z^(2) represents an alkenyl group having 2 to 10 carbon atoms, etc., A^(x) represents an organic group having an aromatic ring and 2 to 30 carbon atoms, A^(1) represents a trivalent aromatic group, etc., each of A^(2) and A^(3) represents a divalent alicyclic hydrocarbon group having 3 to 30 carbon atoms, each of A^(4) and A^(5) represents a divalent aromatic group having 4 to 30 carbon atoms, etc., Q^(1) represents an alkyl group having 1 to 6 carbon atoms, etc., and each of m and n represents 0 or 1.


The present invention relates to: a polymerizable compound represented by a formula (I), wherein each of Y^(1) to Y^(8) independently represents -O-, -O-C(=O)-, -C(=O)-O- or the like; each of A^(2), A^(3), G^(1), and G^(2) independently represents a divalent linear aliphatic group having 1 to 20 carbon atoms or the like; each of Z^(1) and Z^(2) independently represents an alkenyl group having 2 to 10 carbon atoms or the like; A^(x) represents an organic group having 2 to 30 carbon atoms that includes at least one aromatic ring; A^(y) represents a hydrogen atom, an alkyl group having 1 to 20 carbon atoms or the like; A^(1) represents a trivalent aromatic group or the like; each of A^(4) and A^(5) independently represents a divalent aromatic group having 6 to 30 carbon atoms or the like; and Q^(1) represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or the like; and others. According to the present invention, it becomes possible to provide: a polymerizable compound that have a practical low melting point, exhibit excellent solubility in a general-purpose solvent, can be produced inexpensively, can be dried at a lower temperature, has excellent energy efficiency, and can produce an optical film that achieves uniform conversion of polarized light over a wide wavelength band; and others.

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