Nissan Chemical Industries Limited

Fujikura Limited

Nippon Telegraph and Telephone Corporation

Hideo Suzuki

Takayuki Tamura

Isao Hashiba

Tsuyoshi Shimomichi

Keiji Oohashi

Atsuo Murata

Kenichi Tokunaga

Shinji Araki

Takahiro Noda

Takeshi Mita

Hisao Ikeda

Toshiaki Takeyama

Shuji Tsuchiya

Kazuhiro Yamagishi

Yasuyuki Sugawara

Masami Hanaue

Kazuhiko Akimoto

Masao Nishikubo

Norio Tanaka

Toyohiko Abe

Masatoshi Baba

Takayasu Nihira

Hideo Kawashita

Kazunaga Kobayashi

Kentaro Ohmori

Yoshinori Ochiai

Kazuya Ebara

Shinichiro Takigawa

Noriaki Koto

Masaki Nagai

Hiroyuki Sawano

Naoki Shamoto

Masami Adachi

Yoshikazu Ootsuka

Masaaki Kawase

Satoshi Yamazaki

Syuji Tsuchiya

Kanji Ohtsuka

Kanji Otsuka

Kazuo Osaki

Yasuo Katsumura

Masafumi Nomura

Motohito Shiratori

Hiromichi Shinohara

Nobuyasu Sato

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

To provide a polyimide precursor and/or polyimide which has an excellent solubility in various organic solvents, and with which a liquid crystal alignment film can be obtained which is excellent in a rubbing resistance and which is hardly deteriorated even by irradiation with backlight. A polyimide precursor having its terminal amino group modified with at least one alicyclic epoxydicarboxylic acid anhydride selected from the group consisting of compounds of the formulae [1] and [2], or a polyimide obtained by imidizing it: wherein Y is a Calkylene or an oxygen atom, and Ris a hydrogen atom or an organic group represented by &#x2014;X&#x2014;X&#x2014;X, wherein Xis a single bond or &#x2014;CH&#x2014;, Xis a single bond or &#x2014;O&#x2014;, and Xis a Calkyl group, a Chaloalkyl group or a Calkyl group containing a cyano group.

Polyimide precursor modified with dicarboxylic acid anhydride, imidized polyimide and liquid crystal aligning agent using it

A cage 1,2,3,4-cyclopentanetetracarboxylic acid (1,3:2,4)-dianhydride compound represented by formula [1], and a polyimide obtained by condensing the compound with a diamine. With the compound, it is possible to provide a polyimide which shows no absorption in the ultraviolet region and is highly transparent to light, has high insulating properties, has improved heat resistance and processability, and has excellent solubility in organic solvents. (In formula [1], Rand Reach independently represents a hydrogen atom, a halogen atom, or a Calkyl.)

Cage-shaped cyclopentanoic dianhydride, method for production thereof, and polyimide

There is provided a one-step process for producing a dihydroxy-substituted coumarin dimer compound by a photodimerization reaction of a hydroxy-substituted coumarin compound. The process comprises subjecting a hydroxy-substituted coumarin compound to a photodimerization reaction in a solvent selected from aliphatic ketones having 3 to 10 carbon atoms, aliphatic carboxylic acid esters having 2 to 10 carbon atoms, aliphatic alcohols having 1 to 10 carbon atoms, aliphatic nitriles having 2 to 10 carbon atoms, ethers having 4 to 10 carbon atoms, amides having 3 to 10 carbon atoms, and a mixture thereof to obtain a dihydroxy-substituted coumarin dimer compound.

Process for production of coumarin dimer compound

A polyamic acid comprising at least 10 mol % repeating units represented by the formula [1] or [2]; and a polyimide represented by the formula [3] or [4] which is obtained from the polyamic acid. A polyimide film having high heat resistance and satisfactory in light-transmitting properties and tensile strength is obtained from the polyamic acid. (In the formulae, Rand Reach independently represents hydrogen or Calkyl; Rand Reach independently represents hydrogen, halogeno, Calkyl, or phenyl or the Rand Ron adjoining carbon atoms are bonded to each other to form Ccycloalkyl or phenyl; Rrepresents a divalent organic group; and n is an integer of 2 or larger.)

Polyamic acid and polyimide

Disclosed are a polyamic acid containing not less than 10 mol % of a repeating unit represented by the formula [1] below, and a polyimide represented by the formula [2] below which is obtained from such a polyamic acid. The polyamic acid and polyimide have high heat resistance as shown by a thermal decomposition temperature of not less than 300&#xb0; C. In addition, the polyamic acid and polyimide have good workability because of their high solubility in solvents, while exhibiting good light transmission. (In the formula, Rand Rindependently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms; Rand Rindependently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 10 carbon atoms or a phenyl group, or alternatively Rand Ron adjacent carbon atoms may combine together to form a cycloalkyl group having 3 to 8 carbon atoms or a phenyl group; Rrepresents a divalent organic group; and n represents an integer of not less than 2.) 

A process which comprises reacting a 1,2,3,4-cyclobutanetetracarboxylic-1,2:3,4-dianhydride [1] with an alcohol [2] in the presence of an acid catalyst to obtain a compound [3], isomerizing the compound [3] with a base catalyst into a compound [4], reacting the compound [4] with an organic acid to obtain a compound [5], and reacting the compound [5] with a dehydrating agent to obtain a 1,2,3,4-cyclobutanetetracarboxylic-1,3:2,4-dianhydride: wherein Rand Rare each independently hydrogen, halogeno, alkyl of 1 to 10 carbon atoms, halogenated alkyl of 1 to 10 carbon atoms, cycloalkyl of 3 to 8 carbon atoms, phenyl, or cyano; and Ris alkyl of 1 to 10 carbon atoms. 

Cage-shaped cyclobutanoic dianhydrides and process for production thereof

A sulfoalkylthiophene compound of the following formula [1] and a hydroxyalkylthiophene compound of the following formula [2], from which a useful &#x3c0;-conjugated conductive polymer monomer capable of oxidation polymerization can be provided: (wherein R is a hydrogen atom, an alkali metal atom or an alkaline earth metal atom, and n is an integer of 1 to 3) (wherein n is as defined above).

Sulfoxyalkylthiophene and process for producing the same

The present invention relates to a process for preparing bromoisophthalic acid compounds, particularly 5-bromoisophthalic acid compounds and 4,5-dibromoisophthalic acid compounds comprising brominating an isophthalic acid compound of the general formula (1)wherein Rand Rindependently of one another are hydrogen atom or Calkyl, with bromine in a solvent containing sulfur trioxide. The object of the invention is to provide a process for preparing bromoisophthalic acid compounds, particularly 5-bromoisophthalic acid compounds and 4,5-dibromoisophthalic acid compounds in a highly selective manner by using bromine that is industrially inexpensive.

Process for the preparing bromoisophithalic acid compound

Alicyclic compound and curable resin composition

The invention relates to a process for preparation of 4,6-diaminoresorcinol or salts thereof by reducing 4,6-bis(substituted)phenylazoresorcinol expressed by the formula &lsqb;1&rsqb;

Process for preparation of 4,6-diaminoresorcinol or salts thereof

Processes for producing 4,6-bis (substituted)phenylazoresorcinols

A dialkyl dialkoxycarbonylphenylphosphonate which is useful as a resin modifier, a process for producing the same in high yield at a low cost, and a process for producing a dicarboxyphenylphosphonic acid in high yield at a low cost are described. The process for producing a dialkyl dialkoxycarbonylphenylphosphonate comprises heating and reacting a dialkoxycarbonylphenyl halide with a trialkyl phosphate in the presence of a catalyst comprising an element of group VIII of the periodic table (such as an alumina supported palladium catalyst) and hydrolyzing the obtained dialkyl dialkoxycarbonylphenylphosphonate in the presence of an acid or base to produce a dicarboxyphenylphosphonic acid.

Phenylphosphonic acid derivative and production process therefor

An oxime derivative represented by the general formula [1]: ##STR1## wherein A, B, Y and W represent each a specified group, and an optically active isomer thereof and a fungicide for agricultural and horticultural use for containing said derivative or an optically active isomer thereof as an active ingredient are disclosed.

Oxime derivative and fungicide for agricultural and horticultural use

Growing community of inventors

Funabashi, Japan

Hideo Suzuki