Showa Denko K.k.

Nippon Polytech Corp.

Kansai Paint Company, Ltd.

Showa Denko Kabushiki Kaisha

Kazuhiko Ooga

Hiroshi Uchida

Tsuneo Tajima

Kazufumi Kai

Shuichi Sugita

Masataka Takeuchi

Hirotoshi Kamata

Takeo Watanabe

Kai Suzuki

Naoki Murata

Koji Tokita

Jun Noguchi

Toshio Koshikawa

Ritsuko Azuma

Hideo Yashima

Atsushi Umino

Miyuki Ueda

Eri Tamura

Toshio Fujita

Shinji Tomita

Kazuya Kimura

Masanao Hara

Keisuke Ohta

Hajime Sukejima

Yasuzi Tanaka

Yoshifumi Asai

Yoshihiro Honda

Provided are a polyurethane and a curable composition capable of obtaining an overcoat film for a flexible wiring board that is excellent in low-warpage properties, flexibility, long-term insulation reliability, and wiring disconnection preventing properties. The polyurethane has: a structural unit of formula (1) (in formula (1), an n-number of Reach independently represents a 1,2-phenylene group or a 1,2-phenylene group having a substituent, an (n+1)-number of Reach independently represents a hydrocarbon group having 3-9 carbon atoms, and n represents an integer from 1 to 50); a structural unit of formula (2) (in formula (2). Rrepresents a divalent organic group having 6-14 carbon atoms); and a structural unit of formula (3) (in formula (3), Rrepresents a divalent organic group having 6-14 carbon atoms, and Rrepresents a methyl or ethyl group). 

Polyurethane, curable composition, overcoat film, and flexible wiring board and production method therefor

A curable composition for forming an overcoat film for flexible wiring boards, the curable composition being effective in improving adhesion to substrates, low warpage, flexibility, the property of inhibiting wire breakage, and long-term reliability. The curable composition according to the present invention comprises a polyurethane (component a) having carboxyl groups and an aromatic-ring concentration of 0.1-6.5 mmol/g and containing an organic residue derived from a polyisocyanate, a solvent (component b), and a compound (component c) having two or more epoxy groups in the molecule.

Curable composition, cured object, overcoat film, coated flexible wiring board, and process for producing same

An object of the invention is to provide carboxyl group-containing polyurethanes that have small curing warpage and can give cured products having excellent electrical insulating properties and flexibility, curable compositions that contain the carboxyl group-containing polyurethane and can give cured products having good electrical insulating properties, cured products obtained from the compositions, flexible circuit boards covered with the cured products, and processes for manufacturing flexible circuit boards. The carboxyl group-containing polyurethane is obtainable from materials including a (poly)carbonate polyol (a), a polyisocyanate (b) and a carboxyl group-containing polyol (c). The (poly) carbonate polyol includes an organic residue derived from a dimer diol and an organic residue derived from a polyol having a C10-20 alicyclic structure.

(Poly)carbonate polyol and carboxyl group-containing polyurethane obtained from the (poly)carbonate polyol

It is an object of the present invention to provide a curable composition which provides a cured product excellent in low warpage properties and long-term electrical insulation reliability and causes little bleeding during screen printing. The present invention is a curable composition comprising the following components (a) to (e): a component (a): polyurethane having a functional group capable of curing reaction and a carbonate bond, a component (b): &#x3b3;-butyrolactone, a component (c): diethylene glycol diethyl ether, a component (d): inorganic fine particles and/or organic fine particles, and a component (e): a compound having two or more epoxy groups in one molecule.

Curable composition

According to the present invention, a novel epoxy group-containing copolymer, including a production process thereof, and an epoxy (meth)acrylate copolymer starting from the epoxy group-containing copolymer, including a production process thereof are provided. The epoxy group-containing copolymer of the present invention contains a specific epoxy group-containing repeating unit and an olefin-based repeating unit. A novel epoxy (meth)acrylate copolymer of the present invention is produced by reacting the epoxy group-containing copolymer with (meth)acrylic acid.

Epoxy group-containing copolymer, epoxy (meth)acrylate copolymer using the same and their production processes

A polymerizable compound represented by formula (1): wherein each Rindependently represents at least one organic residue selected from the group consisting of alkylene groups, branched alkylene groups, cycloalkylene groups and arylene groups, Rrepresents an organic residue derived from an alcohol compound, a phenol compound or a carboxylic acid compound, n represents an integer of 0 to 20, a production process of the polymerizable composition, a composition using the polymerizable compound, a cured product obtained by curing the composition and a production process of the cured product. The polymerizable compound exhibits a good adhesive property to a substrate such as glass and is imparted with radical polymerizability to enable heat curing and/or active energy ray curing. 

Polymerizable compound, polymerizable composition and cured product containing the compound

A compound favored with low viscosity, capable of providing a cured product having high refractive index, and suitable for application to optical materials, including plastic lens material, radical polymerizable flame retardant and the like, as well as a process for producing the compound, a plastic lens composition using the compound, a plastic lens obtained by curing the composition and a process for producing the plastic lens. A novel aromatic ring-containing polyvalent (meth)allyl ester derived from a polyvalent carboxylic acid of trivalent or greater valent is employed.

POLYVALENT CARBOXYLIC ACID ESTER, PROCESS FOR PRODUCING THE CARBOXYLIC ACID ESTER, PLASTIC LENS COMPOSITION USING THE CARBOXYLIC ESTER, PLASTIC LENS OBTAINED BY CURING THE COMPOSITION AND PROCESS FOR PRODUCING THE PLASTIC LENS

An alicyclic (meth)allyl ester monomer obtained by a specific production process. An alicyclic (meth)allyl ester compound for plastic lenses, which can be obtained by a simple and easy production process and which can endure a long-term storage, is produced using the monomer, and a plastic lens is obtained using the compound.

PROCESS FOR PRODUCING ALICYCLIC (METH)ALLYI ESTER MONOMER, ALICYCLIC (METH)ALLYL ESTER COMPOUND, PRODUCTION PROCESS OF THE COMPOUND, PLASTIC LENS COMPOSITION CONTAINING THE COMPOUND, PLASTIC LENS OBTAINED BY CURING THE COMPOSITION, AND PRODUCTION PROCESS OF THE PLASTIC LENS

A plastic lens composition having a low viscosity, a plastic lens by curing the composition, and a method for producing the plastic lens are disclosed. The plastic lens composition contains a bromine-containing (meth)allyl ester-based compound and exhibits low viscosity and the cured composition has a high refractive index of or more and a low specific gravity of or less.

Plastic lens composition, plastic lens, and process for producing the plastic lens

A plastic lens material comprising a compound in which a part or all of 1,4-cyclohexane dicarboxylate structural units are a cis structure; a production process of the material; a plastic lens composition containing the material; a plastic lens obtained by curing the composition; and a production process of the plastic lens. A plastic lens material free of changing into a white and turbid material during storage for a long period of time is provided.

Plastic lens material, production process of the material, composition for plastic lens, plastic lens obtained by curing the composition, and production process of the plastic lens

An alicyclic (meth)allyl ester monomer obtained by a specific production process. An alicyclic (meth)allyl ester compound for plastic lenses, which can be obtained by a simple and easy production process and which can endure a long-term storages, is produced using the monomer, and a plastic lens is obtained using the compound.

Production of alicyclic (meth)allyl esters for plastic lens compositions

Photocurable composition

A photocurable composition comprising an ultraviolet radical polymerization initiator, a cationic dye with absorptions in the visible light region, a quaternary boron salt and optionally a polymerization accelerator, is irradiated with ultraviolet light and visible light either simultaneously or separately, to achieve adequate hardening in air of both the surface and the interior of the cured product, and to provide a cured product with an excellent appearance and without production of coloring substances derived from the polymerization initiator.

Photocurable composition and curing process therefor

A solid polymer electrolyte comprising a composite of (a) a polymeric component which comprises (i) a polymer obtained from at least one compound represented by general formula (IA), (IIA) and/or (IIIA) as described in the specification; or (ii) a polymer obtained from at least one compound having alcoholic hydroxyl groups wherein at least one hydrogen atom of said alcoholic hydroxyl groups is replaced by a unit represented by general formula (X) or (XI) as described in the specification, and (b) at least one electrolyte salt, which has a high ionic conductivity and can be made into a thin film. The present invention is also directed to an electrode comprising the solid polymer electrolyte and an electroactive substance or polarizable material; as well as a process for manufacturing the same. In addition, the present invention is directed to a primary an secondary battery having the solid polymer electrolyte, as well as a process for manufacturing the same. The battery of the present invention has a high capacity, high current density, and, in the case of a secondary battery, has good cyclability. Finally, the present invention is directed to a solid-state electric double layer capacitor comprising the solid polymer electrolyte, as well as a process for manufacturing the same. The electric double layer capacitor has a high output voltage and a large take-out current.

Solid polymer electrolyte, battery and solid-state electric double layer

A near infrared rays-curing putty composition containing (A) a polymerizable ethylenically unsaturated group-containing resin, (B) a polymerizable ethylenically unsaturated compound and (C) a near infrared rays polymerization initiator, said near infrared rays polymerization initiator (C) being a near infrared rays-absorbing cationic dye and a resin powder consisting of gelation polymer fine particles.

Growing community of inventors

Oita, Japan

Kazuhiko Ooga