Nissan Chemical Industries Limited

Nissan Chemical Corporation

Kazuya Ebara

Rikimaru Sakamoto

Hideo Suzuki

Tokio Nishita

Takayuki Tamura

Hikaru Imamura

BangChing Ho

Kazuya Shindo

Provided is a composition for forming release layers which comprises (A) a polyurea including a repeating unit represented by formula (1), (B) an acid compound or a salt thereof, (C) a crosslinking agent selected from among compounds having a nitrogen atom substituted by a hydroxyalkyl group and/or an alkoxymethyl group, (D) a polymeric additive including a repeating unit represented by formula (a1), a repeating unit represented by formula (b), and a repeating unit represented by formula (c), and (E) a solvent, wherein the polymeric additive (D) is contained in an amount of 5-100 parts by mass per 100 parts by mass of the polyurea (A). (In the formulae, the Rmoieties each are independently a hydrogen atom or a methyl group; Ris a branched Calkyl group in which at least one hydrogen atom has been replaced with a fluorine atom; Ris a Chydroxyalkyl group; and Ris a Cpolycycloalkyl group or Caryl group.)

Composition for forming release layer, and release layer

A method for manufacturing a polyhydroxyamide resin (A) containing no chloride includes reacting a coumarin dimer component of Formula (19), where R, R, R, R, Rand Rindependently represent an alkyl group having 1 to 10 carbon atom(s), a halogen atom, a nitro group, an amino group, a cyano group, a carboxy group, an alkoxycarbonyl group having 1 to 10 carbon atom(s), a halogenated alkyl group having 1 to 10 carbon atom(s) or a hydroxy group, and a dimamine in a polar solvent.

Positive photosensitive resin composition and polyhydroxyamide resin

There is provided a novel material used for solar cells that can contribute to the improvement in maximum output of solar cells. A film-forming material for forming a light-collecting film on a transparent electrode of a solar cell, including an aromatic group-containing organic polymer compound (A), wherein the film-forming material exhibits an index of refraction of 1.5 to 2.0 at a wavelength of 633 nm and a transmittance of 95% or more with respect to light having a wavelength of 400 nm, and a solar cell obtained by coating a cured film made from the film-forming material on a surface of a transparent electrode.

Film-forming material

There is provided a novel material used for solar cells that can contribute to the improvement in maximum output of solar cells without using the conventional MPPT system. A film-forming material for forming a light-collecting film on a transparent electrode of a solar cell, including an aromatic group-containing organic polymer compound (A) and a cross-linker (B), wherein the film-forming material exhibits an index of refraction of 1.5 to 2.0 at a wavelength of 633 nm and a transmittance of 95% or more with respect to light having a wavelength of 400 nm, and a solar cell obtained by coating a cured film made from the film-forming material on a surface of a transparent electrode.

There is provided a simple production method of a polyhydroxyimide. A production method of a polyhydroxyimide, characterized by comprising adding to a polyhydroxyimide precursor containing a repeating structure of Formula (1): in which X is a tetravalent aliphatic group or aromatic group, Y is an organic group containing an aromatic group substituted with at least one OH group, and n is an integer of 1 or more, at least a compound of Formula (2) or Formula (3): in which Rto Ror Rto Rare independently a hydrogen atom or a monovalent organic group, and m is a natural number, and heating the resultant reaction mixture at a temperature of 50&#xb0; C. or more to obtain a polyimide having a weight average molecular weight measured by gel permeation chromatography (GPC) in terms of polystyrene of 5,000 to 100,000.

Production method of polyhydroxyimide

There is provided a simple production method of polyhydroxyimide and a positive photosensitive resin composition containing the polyhydroxyimide. A production method of a polyhydroxyimide comprising: adding an acid component that is at least one type of carboxylic acid having a pKa of 0 to 5 to a polyhydroxyimide precursor of Formula (1): (where X is a tetravalent aliphatic or aromatic group, Y is an organic group containing an aromatic group substituted with at least one OH group, and n is an integer of 1 or more); and heating the resultant mixture to a temperature of 50 to 100&#xb0; C. to prepare a poly imide of Formula (2): (where X, Y and n are the same as those defined above) having a weight average molecular weight of 3,000 to 100,000.

Growing community of inventors

Funabashi, Japan

Kazuya Ebara