Nitto-Denko Corporation

Sadahiro Nakanishi

Tadayuki Kameyama

Shoichi Matsuda

Amane Mochizuki

Toru Umemoto

Shusaku Nakano

Mitsuru Ueda

Shunsuke Shuto

Minoru Miyatake

Takashi Kamijo

Hisanari Onouchi

Satoshi Hirata

Yoshihiro Uetani

Ikuo Kawamoto

Shunsuke Noumi

Keisuke Kii

Miyuki Kurogi

Kyoko Ishii

Hiroyoshi Take

Junzo Miyazaki

Kinkou Sho

A method for manufacturing a water resistant optically anisotropic film capable of suppressing the generation of a defect such as a crack or separation is provided. The method for manufacturing the water resistant optically anisotropic of the present invention includes a water resistant treatment step of bringing an optically anisotropic film containing an organic dye having an anionic group into contact with a water resistant treatment liquid containing a multivalent cationic compound and a monovalent cationic compound, and the mass ratio of the multivalent cationic compound and the monovalent cationic compound contained in the water resistant treatment liquid, monovalent cationic compound/multivalent cationic compound, is 0.01 to 2.

Method for manufacturing water resistant optically anisotropic film, and water resistant optically anisotropic film

The present invention provides a polarizing film having a high dichroic ratio. The polarizing film contains a disazo compound represented by the following general formula (1). In the general formula (1), Qrepresents a phenyl group having at least one &#x2014;SOM group; Qrepresents a naphthylene group having at least one &#x2014;SOM group; X represents an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a thioalkyl group having 1 to 4 carbon atoms, a halogeno group, or a polar group; subscript k denotes the number of substitutions of X and represents an integer of 0 to 5; and M represents a counter ion, where when k is an integer of 2 or more, Xs are the same or different. 

Polarizing film, image display device, and method for producing polarizing film

It is possible to obtain a polarizing film having a high dichroic ratio by using a liquid-crystalline coating solution in which a small quantity of a second lyotropic liquid-crystalline low-molecular compound is mixed with a first lyotropic liquid-crystalline low-molecular compound. The second lyotropic liquid-crystalline low-molecular compound has a mole number smaller than the first lyotropic liquid-crystalline low-molecular compound. The molecular size of the second lyotropic liquid-crystalline low-molecular compound is smaller than that of the first lyotropic liquid-crystalline low-molecular compound.

Liquid-crystalline coating solution and polarizing film

There is provided a method for producing a polarizing film having far superior water resistance to conventional polarizing films by contacting a liquid containing cationic polymers with a surface of a polarizing film.

Method for producing water-resistant polarizing film

A liquid-crystalline coating fluid which comprises: an azo compound represented by the following general formula (1); and a solvent to dissolve the azo compound: wherein R is an amino group, a cyano group, a hydroxyl group, a nitro group, a halogen group or a hydrogen atom; and M is a counterion.

Liquid-crystalline coating fluid and polarizing film

The invention provides a battery separator comprising a porous resin film and a crosslinked polymer supported thereon and having iminodiacetic acid groups in side chains of the polymer chains. The iminodiacetic acid group is preferably represented by the formula wherein Mand Mare each independently a hydrogen atom, a lithium atom, a potassium atom, a sodium atom, or triethylamine. It is preferred that the layer of the crosslinked polymer is substantially nonporous or solid, and ion conductive, and that the crosslinked polymer has in the molecule oxetanyl groups which are capable of cation polymerization.

Battery separator and nonaqueous lithium ion secondary battery having the same

The polarizing film of the present invention contains the azo compound represented by the following general formula (I).  In the general formula (I), Q represents a substituted or unsubstituted aryl group, X represents a cationic group, a nitro group, a cyano group, or a hydroxyl group, and M represents a counter ion.

Polarizing film, coating liquid, and image display

There is provided a water-resistant polarizing film including an organic dye having at least two anionic groups, and an alicyclic structure-containing compound having at least two nitrogen atoms in a molecule. Examples of the organic dye typically include an azo compound represented by the following general formula (2): 

Water-resistant polarizing film, and process for producing the same

Provided is a polyfunctional compound which can be used as an optical recording material in which a large quantity of information data can be recorded optically at a high density, which can be used as an optical waveguide material using a refractive index difference occurring between a light-irradiated part and a part not irradiated with light, and which is capable of forming a film and can be used as a photo-alignment film material having excellent photosensitivity.

Polyfunctional compound, optical recording material, optical recording medium, optical recording/reproducing apparatus, optical waveguide material, and photo-alignment film material

Provided is an easy method for production of a high-performance polyfunctional compound which can be used as an optical recording material, an optical waveguide material, a photo-alignment film material, or the like, in a simple manner. The method for production of a polyfunctional compound includes conducting a Michael addition of a compound (A) having a hydrogen atom of pKa&#x2266;15 to a (meth)acrylate or a (meth)acrylamide (B), in which at least one of the compounds (A) and (B) has a photoisomerization group and/or a liquid-crystalline group.

Method for production of polyfunctional compound

The present invention provides a polarizing film containing an azo compound represented by the following formula (1): in which X is a hydrogen atom, a halogen atom, a nitro group, a cyano group, an alkyl group having 1 to 3 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and M is a counter ion.

Polarizing film

An optical film which comprises (i) a substrate without a vertical alignment layer and (ii) a homeotropic alignment liquid crystal film layer formed on the substrate. The homeotropic alignment liquid crystal film layer comprises a homeotropically aligned liquid crystal polymer.

Homeotropic alignment liquid crystal film

An optical film in which at least one layer of a cholesteric liquid crystal layer () and a retardation layer () are laminated, wherein an in-plane retardation of the retardation layer (): (nx&#x2212;ny)&#xd7;Dre is 5 nm or less, and a virtual thickness direction retardation: RZch, and a thickness direction retardation: RZre have a relationship of RZre/(&#x2212;RZch)=0.05 through 0.35, can be used as a brightness enhancement film, and further that provides an excellent visibility satisfactory also when observed not only from a front direction but from an oblique direction in image viewing displays, such as liquid crystal displays.

Optical film, and lighting device and image viewing display using the same

A homeotropic alignment liquid crystal film used for an optical film of a visual display etc. is manufactured by a method in which a side chain type liquid crystal polymer comprising a monomer unit (a) containing a liquid crystalline fragment side chain and a monomer unit (b) containing a non-liquid crystalline fragment side chain is coated on a substrate on which a vertical alignment film is not prepared, and the liquid crystal polymer is fixed while maintaining an alignment state after the liquid crystal polymer is homeotropically aligned in liquid crystal state.

Growing community of inventors

Ibaraki, Japan

Sadahiro Nakanishi