Daicel Chemical Industries, Ltd.

Daicel Corporation

Mitsuru Ohno

Noritsugu Yamasaki

Tomohiro Hashizume

Tohru Shibata

Hiroyuki Matsumura

Shingo Oda

Hiroshi Koyama

Satoru Nose

Miho Kawauchi

Tomoichi Watabe

Tatsuya Nakano

Keizo Inoue

Hiroto Miyake

Takahiro Iwahama

Yoshinori Funaki

Masamichi Nishimura

Akira Eguchi

Tsukasa Yoshida

Shuichi Yamagiwa

Hirokazu Matsuda

Ryota Hamasaki

A cellulose ester, wherein, in a structural formula of the following general formula (I), a degree of substitution where X is an acyl group is from 2.91 to 3.0; the acyl group includes benzoyl group (A) optionally having a substituent, and benzoyl group (B) optionally having a substituent different from that of benzoyl group (A); and when the degree of substitution is 3.0, a degree of substitution of benzoyl group (A) is from 1.5 to 2.9, and a degree of substitution of benzoyl group (B) is from 0.1 to 1.5, wherein all or some of X represents an acyl group; when some of X represents an acyl group, the remainder represents a group selected from a hydrogen atom and an alkyl group; and n represents an integer of from 20 to 20,000.

Cellulose ester and molded article thereof

Provided is a semipermeable membrane having a high chlorine resistance. The semipermeable membrane is formed of a cellulose ester, the cellulose ester having an optionally substituted benzoyl group.

Semipermeable membrane

Provided is a polymer compound that has excellent sensitivity, high resolution, and small line edge roughness and is capable of forming a fine pattern precisely, and less causes post-develop defects. The polymer compound according to the present invention includes a monomer unit (a) and a monomer unit (b). The monomer unit (a) is represented by Formula (a), and the monomer unit (b) includes an alicyclic skeleton containing a polar group. The polar group of the monomer unit (b) is preferably at least one group selected from &#x2014;O&#x2014;, &#x2014;C(&#x2550;O)&#x2014;, &#x2014;C(&#x2550;O)&#x2014;O&#x2014;, &#x2014;O&#x2014;C(&#x2550;O)&#x2014;O&#x2014;, &#x2014;C(&#x2550;O)&#x2014;O&#x2014;C(&#x2550;O)&#x2014;, &#x2014;C(&#x2550;O)&#x2014;NH&#x2014;, &#x2014;S(&#x2550;O)&#x2014;O&#x2014;, &#x2014;S(&#x2550;O)&#x2014;O&#x2014;, &#x2014;OR, &#x2014;C(&#x2550;O)&#x2014;OR, and &#x2014;CN, where Rrepresents, independently in each occurrence, optionally substituted alkyl. 

Polymer compound, resin composition for photoresists, and method for producing semiconductor

Provided is a method for efficiently producing high-purity hydrogenated biphenol based on a simple method that can be industrially utilized using easily-available biphenol as a starting material. The method for producing hydrogenated biphenol according to the present invention is a method for producing hydrogenated biphenol by hydrogenating biphenol represented by the following formula (1): to obtain hydrogenated biphenol represented by the following formula (2): the method including: a reaction step of hydrogenating the biphenol represented by formula (1); and a purification step of washing or crystallizing a reaction product obtained from the reaction step using an aromatic hydrocarbon.

Method for producing hydrogenated biphenol

Disclosed is an oxetane-containing vinyl ether compound including one or more aromatic or non-aromatic carbocycles and/or two or more vinyl ether structures, such as a compound of Formula: wherein Ring Zis non-aromatic carbocycle; Ris vinyl group of Formula: wherein each of R, R, and Ris hydrogen or C1-C4 alkyl; Wis single bond or organic group having a valence of (m+1); Xis, for example, hydrocarbon; 'm' and 'q' are each 1 or 2; and &#x201c;p&#x201d; is 0 to 5. Also disclosed is an alicyclic epoxy-containing vinyl ether compound of Formula: wherein Ring Zis non-aromatic carbocycle; Ris vinyl group of Formula: wherein R, Rand Rare each hydrogen or C1-C4 alkyl; Wis single bond or organic group having a valence of (r+1); Rand Rare hydrogen or alkyl; and &#x201c;r&#x201d; and &#x201c;s&#x201d; are 1 or 2.

Vinyl ether compounds and polymerizable compositions

A method purifies 1-aminocyclopropanecarboxylic acid by subjecting a crude 1-aminocyclopropanecarboxylic acid to crystallization with a solvent mixture containing an organic acid having one to five carbon atoms and a poor solvent for 1-aminocyclopropanecarboxylic acid, which poor solvent is miscible with the organic acid. In the method, the solvent mixture may further contain water. Purification may be carried out by mixing the crude 1-aminocyclopropanecarboxylic acid with the organic acid having one to five carbon atoms, removing insoluble matter by filtration, and adding the poor solvent with or without water to the filtrate to thereby crystallize 1-aminocyclopropanecarboxylic acid.

Purification and production methods of 1-aminocyclopropanecarboxylic acid

A 6-aminocarbonylmethyl-4H-2,3-dioxin-4-one compounds can be produced by reacting a 6-halomethyl-4H-2,3-dioxin-4-one compound with a primary or secondary amine and carbon monoxide. The reaction may be carried out in the presence of a catalyst comprising a platinum group metal. 3-oxopentanedicarboxylic acid monoamides and 3-oxopentanedicarboxylic acid amide esters can be are produced by reacting 6-aminocarbonylmethyl-4H-2,3-dioxin-4-one compound with an alcohol or water. Using such intermediates, 6-aminocarbonylmethyl-4H-2,3-dioxin-4-one compound, 3-oxopentanedicarboxylic acid amide esters can provide in an easy and simple and efficient manner.

Amido compounds and process for producing the same

6-Alkoxycarbonylmethyl-4H-1,3-dioxin-4-one derivatives are produced by reacting a 6-halomethyl-4H-1,3-dioxin-4-one derivative with carbon monoxide and an alcohol or water, and 3-oxopentanedicarboxylic acid esters are further produced by reacting the above derivatives with an alcohol or water. Such a process can produce 3-oxopentanedicarboxylic acid esters in an easy and simple and efficient manner.

Ester and process for producing the same

Reacting a diol (1) with a carbonic ester (2) to produce a cyclic carbonic ester (3) using a salt of a weak acid with an alkaline metal or alkaline earth metal as a catalyst. The diol (1) contains diols having an asymmetric carbon atom. The reaction mixture is neutralized and distilled to obtain a cyclic carbonic ester. Cyclic carbonic esters are produced using an easily accessible and easy to handle reactant, with good yield and under mild and moderate conditions. ##STR1##

Process for producing cyclic carbonic esters

A method of producing a carbonic diester involves allowing an alcohol to react with carbon monoxide and oxygen in the presence of a supported catalyst wherein the support is an activated carbon obtained from a vegetable or polymeric raw material, a support having an aluminum content of up to 2% by weight, or a support having sulfur content of up to 1% by weight.

Catalyst and method for producing carbonic diesters

A catalyst for synthesizing a carbonic diester includes at least one copper compound selected from among copper oxides, copper hydroxides, a salt of copper with a weak acid consisting of the elements other than halogen such as copper borates, and complexes or complex salts consisting of the elements other than halogen and formed with copper or a copper compound a and ligand. The catalyst has a high activity, a high reaction selectivity and excellent stability with a minimal risk of corroding equipment. The catalyst can include, as a co-catalyst component, a platinum-group metal such as palladium or a halogen-free platinum-group metal compound such as palladium acetate. The catalyst component may be supported on a carrier, for example, an activated carbon. A carbonic diester is advantageously produced by allowing an alcohol to react with carbon monoxide and oxygen in the presence of the catalyst. The corrosion due to the catalyst is considerably inhibited so that a dimethyl carbonate can be produced with an excellent stability for a long duration.

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Himeji, Japan

Mitsuru Ohno