Mitsubishi Gas Chemical Company, Inc.

Yohei Abiko

Shuya Suenaga

Shinji Sekiguchi

Aoi Daito

Teruhisa Matsumaru

Takashi Yamamoto

Daisuke Ohno

Kazuaki Mukasa

Ryuichiro Kawai

Saeko Sato

Hiroaki Oka

Tomohiro Hariu

Takafumi Takada

A polyimide resin includes structural unit A derived from tetracarboxylic dianhydride and structural unit B derived from diamine, wherein unit A includes at least one unit selected from the group consisting of unit (A-1) derived from a compound represented by Formula (a-1) and unit (A-2) derived from a compound represented by Formula (a-2), and unit B includes unit (B-1) derived from a compound represented by Formula (b-1) and includes unit (B-2) derived from a compound represented by Formula (b-2).

Polyimide resin, varnish, and polyimide film

A method for controlling a polyimide backbone structure, including: in preparation of a polyimide through reaction of a diamine component and (1S,2R,4S,5R)-cyclohexanetetracarboxylic dianhydride in an organic solvent containing an aprotic amide solvent and a lactone solvent, adjusting one or more of reaction conditions of a mass ratio of the aprotic amide solvent and the lactone solvent, a reaction temperature, a reaction time, and an amount of the aprotic amide solvent, so as to convert a cis-structure derived from the (1S,2R,4S,5R)-cyclohexanetetracarboxylic dianhydride in the formed polyimide to a trans-structure derived from (1R,2S,4S,5R)-cyclohexanetetracarboxylic dianhydride corresponding to the reaction conditions, thereby controlling a proportion of the trans-structure.

Method for controlling polyimide backbone structure and method for producing polyimide

The present invention is directed to a polyimide resin comprising a structural unit A derived from a tetracarboxylic dianhydride and a structural unit B derived from a diamine, wherein the structural unit A contains a structural unit (A-1) derived from 4,4'-(hexafluoroisopropylidene)diphthalic anhydride, and the structural unit B contains a structural unit derived from an aliphatic diamine, a polyimide resin composition comprising the polyimide resin and inorganic nanoparticles, and a polyimide film comprising the polyimide resin or the polyimide resin composition. Provided are a polyimide resin and a polyimide resin composition, each of which can form a film having not only a heat resistance, and colorlessness and transparency but also low water absorption properties, and a polyimide film.

Polyimide resin, polyimide resin composition, and polyimide film

Disclosed are a polyimide resin containing a structural unit represented by the following formula (1-1), and a polyimide film containing a structural unit represented by the following formula (1-2) and having a thickness of 10 to 50 &#x3bc;m. Rand Rin the formula (1-1) each independently represent any group of the following formulae (i) to (iv), Rand Rin the formula (1-2) each independently represent a group of the following formula (i) or formula (ii), and in these formulae, * bonds to the carbon with * in the formula (1-1) and the formula (1-2) and ** bonds to the carbon with ** in the formula (1-1) and the formula (1-2). A polyimide resin capable of forming a polyimide film excellent in transparency and having a low coefficient of linear thermal expansion, and a polyimide film having a lower coefficient of linear thermal expansion are provided. 

Polyimide resin and polyimide film

Provided is a polyimide resin composition and a production method thereof, wherein the polyimide resin composition contains an alicyclic polyimide resin having a structural unit represented by the following general formula (1) and inorganic particles of at least one selected from the group consisting of titanium dioxide, barium titanate, and zirconium oxide, wherein the alicyclic polyimide resin has a glass transition temperature of 260&#xb0; C. or higher, 

Polyimide resin composition, method for producing same, and polyimide film

A polyimide resin including a structural unit A derived from a tetracarboxylic dianhydride and a structural unit B derived from a diamine compound, wherein the structural unit A includes a structural unit (A-1) derived from a compound represented by the following formula (a-1), and the structural unit B includes a structural unit (B-1) derived from a compound represented by the following formula (b-1):  wherein m and n in the formula (b-1) each independently are an integer of 0 or 1.

Polyimide resin and polyimide resin composition

An asymmetric membrane including a crosslinked polyimide resin, the crosslinked polyimide resin being formed by crosslinking a polyimide resin by a crosslinking agent; the polyimide resin including a structural unit (A) derived from tetracarboxylic dianhydride and a structural unit (B) derived from diamine; the structural unit (A) including a structural unit (A-1) derived from a compound represented by Formula (a-1); the structural unit (B) including a structural unit (B-1) derived from Formula (b-1), and a proportion of the structural unit (B-1) per 100 mol % of the structural unit (B) being from 0.1 to 50 mol %; and the crosslinking agent being a compound having not less than two functional groups that bond with carboxy groups.  In Formula (b-1), Qand Qare each independently a group including an aromatic group, an aliphatic hydrocarbon group, and/or an alicyclic hydrocarbon group; X is a single bond or a particular group.

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Kanagawa, Japan

Yohei Abiko