Abstract: A resist composition including a base resin component (A) and an acid-generator component (B) which generates acid upon exposure, the component (A) including a resin (A1) which has a structural unit (a0) represented by general formula (a-0) shown below: wherein R represents a hydrogen atom, a halogen atom, a lower alkyl group or a halogenated lower alkyl group; a represents an integer of 0 to 2; b represents an integer of 1 to 3; c represents an integer of 1 to 2; and a+b is an integer of 2 or more.

Abstract: A tetracarboxylic acid compound of formula (1) or (2) wherein A represents a divalent group; X1, X2 and X3 respectively represent a hydrogen atom or the like; R1, R2, R3 and R4 respectively represent a carboxyl group or an acid anhydride group; n represents 1 or 2; and B represents a cyclic group.

Abstract: A resist composition including a base resin component (A) and an acid-generator component (B) which generates acid upon exposure, the component (A) including a resin (A1) which has a structural unit (a0) represented by general formula (a-0) shown below: wherein R represents a hydrogen atom, a halogen atom, a lower alkyl group or a halogenated lower alkyl group; a represents an integer of 0 to 2; b represents an integer of 1 to 3; c represents an integer of 1 to 2; and a+b is an integer of 2 or more.

Abstract: Disclosed is a novel tetracarboxylic acid compound having excellent characteristics such as high transparency, low dielectric property, low water absorption, low thermal expansion, solvent solubility and etching characteristics, while exhibiting high heat resistance at the same time. This tetracarboxylic acid compound is useful as a raw material monomer for producing a polyesterimide or a polyamideimide. Specifically disclosed is a tetracarboxylic acid compound represented by the general formula (1) or (2) below. In the formulae, A represents a divalent group; X1, X2 and X3 respectively represent a hydrogen atom or the like; R1, R2, R3 and R4 respectively represent a carboxyl group or an acid anhydride group; n represents 1 or 2; and ring B represents a cyclic group.

Abstract: The present invention provides a (meth)acrylate containing a heterocyclic ring, which is a structure necessary for achieving physical properties required in many fields, and a hydrophilic group in the same monomer molecule and further provides a process for producing the same from industrially easily-available starting materials by industrially feasible reactions. A (meth)acryloyloxytetrahydrofuran having a structure represented by the following general formula (1): wherein R1 and R2 each is a hydrogen atom or a (meth)acryloyl group represented by the following general formula (2) and at least one of R1 and R2 is a (meth)acryloyl group represented by the general formula (2).

Abstract: An object of the present invention is to provide a process for purifying 2-methyladamantan-2-yl(meth)acrylate with high separation efficiency and an industrially advantageous preparation process of 2-methyladamantan-2-yl(meth)acrylate. The present invention pertains to a preparation process of 2-methyladamantan-2-yl(meth)acrylate which comprises reacting 2-methyleneadamantane and (meth)acrylic acid by an acid catalyst to obtain a reaction mixture, and then separating 2-methyleneadamantane from the reaction mixture to obtain 2-methyladamantan-2-yl(meth)acrylate, wherein the reaction mixture is distilled in the presence of an organic compound having a boiling point, under atmospheric pressure, of 150° C. or greater but not greater than 260° C.

Abstract: An organic metal complex having the formula (I): wherein X, M, X1-X10 and R1-R8 are as defined herein, having near infrared absorption with visible light transmittance.

Abstract: A process for producing an unsymmetrical chain carbonic acid ester is described, which comprises reacting a first symmetrical chain carbonic acid ester with a second symmetrical chain carbonic acid ester or a monohydric alcohol in the presence of a catalyst comprising as an active catalyst component an oxide of at least one element selected from the Group IIIB elements of the periodic table.

Abstract: The present invention relates to a method of producing an aromatic carbonate by reacting an aromatic hydroxy compound, carbon monoxide, and oxygen, wherein the reaction is carried out in the presence of a catalyst comprising:(A) at least one selected from palladium and palladium compounds;(B) at least one lead compound;(C) at least one cobalt compound; and,(D) at least one halide.According to this method an aromatic carbonate which produces only a small amount of impurities and has excellent selectivity can be produced.

Abstract: A process for producing 1,4-butanedial monoacetal by reacting acrolein acetal with a synthesis gas containing carbon monoxide and hydrogen, in the presence of a rhodium catalyst and an accelerator of formula (I) ##STR1## wherein R.sup.1 and R.sup.2 each, independently, denote a hydrogen atom, a C.sub.1 -C.sub.20 alkyl group or a C.sub.6 -C.sub.20 aryl group, or R.sup.1 and R.sup.2 together form a --(CH.sub.2).sub.n -- group, n is an integer of from 2 to 7, R.sup.3 and R.sup.4 each, independently, denote halogen or a trifluoromethyl group, and p and q are each, independently, an integer of from 0 to 3, which process can also be extended to the hydroformylation of other compounds which contain an olefin group in a terminal position.

Abstract: The present invention relates to a method of producing an aromatic carbonate by reacting an aromatic hydroxy compound, carbon monoxide and oxygen using a catalyst system for suppressing the production of aryl aromatic o-hydroxycarboxylate as a by-product. The catalyst system consists of the following compounds:(A) at least one selected from palladium and palladium compounds;(B) at least one selected from lead compounds; and(C) at least one halide selected from quaternary ammonium halides and quaternary phosphonium halides; and if required,(D) at least one selected from copper and copper compounds.The method of the present invention can increase the yield of an aromatic carbonate per palladium (the turnover number of palladium).

Abstract: A process for preparing 2-hexene-1,6-dial comprising dimerizing 2-propenal in the presence of an organometallic compound of the group VIII metal. The desired compound can be obtained under mild conditions with industrial advantages.