Mitsubishi Rayon Company, Limited

Mitsubishi Chemical Corporation

Hymo Corporation

Ryuichi Ansai

Junichi Nakamura

Satoshi Sakuma

Yoshihiro Kamon

Kuniyoshi Ogura

Hiroyuki Nogami

Kazuaki Mukai

Takeru Jo

Tadayuki Fujiwara

Yasuharu Mori

Hikaru Momose

Atsushi Yasuda

Tadahiro Ozawa

Shinichi Maeda

Atsushi Ootake

Kana Taniguchi

Masaru Sugiura

Sho Katsumata

Hideaki Kuwano

Takafumi Asai

Masatoshi Ura

Fumi Oono

Akihiro Ishii

Keisuke Kato

Fumiaki Satou

Provided is a polymer including a constituent unit (1) based on a monomer represented by Formula (1), in which a content of a constituent unit based on a monomer having a polycyclic structure is 35 mol % or less. In Formula (1), Rrepresents a hydrogen atom or a methyl group, Arepresents a linking group including an ester bond, or a single bond, where Ahas no tertiary carbon atom, and Zrepresents an atomic group forming a sulfur-containing cyclic hydrocarbon group having 3 to 6 carbon atoms, which includes a carbon atom bonded to A, and —SO—.

Polymer, resist composition, method for manufacturing substrate having pattern formed therein, and (meth)acrylic ester and production method therefor

Polymer, resist composition, method for manufacturing substrate having pattern formed therein, and (meth) acrylic ester and production method therefor

Provided are a method for recovering gold, in which gold is recovered from a solution containing a gold cyano complex using a crosslinked resin containing a vinyl amine unit, by which gold can be efficiently recovered from the solution not only in a case (A) where a concentration of the gold cyano complex in the solution is low but also in a case (B) where another metal is dissolved in the solution; a method for recovering gold, in which the crosslinked resin and the solution are brought into contact with each other to separate the crosslinked resin and the solution from each other, by which gold can be efficiently recovered from the solution not only in the case (A) but also in the case (B); and a gold recovery facility comprising: a container inside which the crosslinked resin is accommodated in a flowable manner; and a device which feeds the solution to the container, by which gold can be efficiently recovered from the solution not only in the case (A) but also in the case (B).

Method for recovering gold and gold recovery facility

The present invention relates to a polyester resin which comprises a constituent unit represented by general formula (1), a constituent unit derived from a compound having a bisphenol skeleton and a constituent unit derived from a polyvalent carboxylic acid, and wherein the constituent unit derived from a compound having a bisphenol skeleton is contained in an amount of 20 parts by mole or more per 100 parts by mole of the constituent unit derived from a polyvalent carboxylic acid. The present invention is able to provide a polyester resin which has excellent solubility in a solvent and excellent pulverization properties, and which provides a toner having excellent storage stability. 

Polyester resin, method for producing same, and toner

Provided is a resist copolymer which has favorable sensitivity, enables a resist pattern to be formed to have a favorable shape, has favorable dry etching resistance when a dry etching is carried out using the resist pattern as a mask, and suppresses the surface roughness of a pattern formed by carrying out a dry etching process to a substrate. A resist copolymer including a constituent unit (1) based on a (meth)acrylic acid ester derivative having a cyclic hydrocarbon group such as an adamantane ring and two or more cyano groups bonded to the cyclic hydrocarbon group, a constituent unit (2) having a lactone backbone and a cross-linking cyclic structure, and a constituent unit (3) having an acid leaving group.

Resist copolymer and resist composition

Disclosed is a method for producing a (meth)acrylate ester wherein a high purity (meth)acrylate ester is obtained with a high yield, with a reduced loss of (meth)acrylic acid anhydride. In the method, (meth)acrylic acid is recovered with a high yield, and the (meth)acrylate ester is purified easily. Specifically disclosed is a method for producing a (meth)acrylate ester which comprises: (1) a step of producing (meth)acrylic acid anhydride by reacting a specific fatty acid anhydride and (meth)acrylic acid, while removing a by-produced fatty acid; (2) a step of obtaining a (meth)acrylate ester by reacting an alcohol and unpurified (meth)acrylic acid anhydride obtained in step (1) preferably at a temperature not less than 90&#xb0; C.; and (3) a step of recovering (meth)acrylic acid by distillation preferably at a temperature not less than 90&#xb0; C. The method may also comprise a step of heating or distilling the reaction liquid obtained in step (2) at a temperature not less than 90&#xb0; C.

Method for producing a (meth)acrylate

It is an object of the present invention to provide a method for producing (meth)acrylic anhydride that provides high yield and high efficiency and can suppress side reactions, in a method for reacting (meth)acrylic acid with a fatty acid anhydride to produce (meth)acrylic anhydride. The method for producing (meth)acrylic anhydride according to the present invention is a method for producing (meth)acrylic anhydride, including reacting a fatty acid anhydride with (meth)acrylic acid to produce (meth)acrylic anhydride, while extracting a fatty acid produced as a by-product, wherein the reaction is performed, while adjustment is performed so that a molar ratio of the (meth)acrylic acid to the (meth)acrylic anhydride in a reaction liquid is 0.3 or more.

Method for producing (meth)acrylic anhydride, method for storing (meth)acrylic anhydride, and method for producing (meth)acrylate

A 5-methylene-1,3-dioxolan-4-one derivative and a monomer and copolymer thereof and a resist composition containing the polymer or copolymer where the 5-methylene-1,3 -dioxolan-4-one derivative is of formula (1): wherein Rrepresents a bridged cyclic hydrocarbon group containing 4 to 16 carbon atoms, or a linear or branched alkyl group containing 1 to 6 carbon atoms which has a bridged cyclic hydrocarbon group containing 4 to 16 carbon atoms as a substituent; Rrepresents a hydrogen atom, or a linear or branched alkyl group containing 1 to 6 carbon atoms; or Rand Rrepresent a bridged cyclic hydrocarbon group containing 4 to 16 carbon atoms together with the carbon atom to which they are bound, provided that the alkyl group and the bridged cyclic hydrocarbon group may have at least one substituent selected from a group consisting of a linear or branched alkyl group containing 1 to 6 carbon atoms which may be optionally substituted, a hydroxy group, a carboxy group, an acyl group containing 2 to 6 carbon atoms, an alkoxy group containing 1 to 6 carbon atoms, and a carboxy group esterified with an alcohol containing 1 to 6 carbon atoms.

5-methylene-1,3-dioxolan-4-one derivatives, process for their production, polymers of the derivatives, resist compositions, and pattern formation process

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Yokohama, Japan

Ryuichi Ansai