Toagosei Company, Ltd.

Hiroshi Niizuma

Mamoru Takahashi

Xinlin Tu

Yuuichi Sumida

Madoka Furuta

Makoto Hirakawa

Masao Takei

A photosensitive resin composition which is excellent in storage stability required for one-part type compositions and in processability required for dry-film formation and gives a cured product suitable for FPC substrates or suspension substrates for hard-disc which each retains essential properties required for solder resists, such as heat resistance, water resistance, and electrical-insulation reliability, and has flexibility and low polluting property. The composition comprises: a compound which has a carbon-carbon double bond and carboxy group and is obtained by allowing a bisphenol type epoxy compound and an unsaturated monocarboxylic acid to react and then allowing a polybasic acid anhydride to undergo addition reaction with part or all of the secondary hydroxy groups of the reaction product; a urethane (meth)acrylate compound having a structure derived from a polycarbonate polyol structure; another polymerizable compound having a carbon-carbon double bond; and a photopolymerization initiator.

Photosensitive resin composition, composition for solder resist, and photosensitive dry film

The present invention relates to a process for producing a metal oxide catalyst which is suitable for production of acrylic acid or acrylonitrile in one stage by a catalytic oxidation reaction of propane in a high yield. The present invention is characterized by using a fine particle of metallic tellurium obtained by reducing a Te compound with a reductant as a raw material for producing an oxide catalyst including metal elements Mo&#x2014;V&#x2014;Nb&#x2014;Te. The fine particle of metallic tellurium is preferably one containing primary particles having a particle size of not more than 4.0 &#x3bc;m. By using a metal oxide obtained by the process of the present invention, acrylic acid can be produced from propane by a one-stage oxidation reaction in a higher yield not less than 40%.

Process for producing metal oxide catalyst

The invention relates to a process for producing a metal oxide catalyst capable of producing acrylic acid, acrylonitrile or the like in one stage by catalytic oxidation reaction of propane in a high yield. The invention is characterized by using one obtained by finely ground metallic Te or metallic Sb in water or an organic solvent as a raw material for the production of an oxide catalyst made of metal elements Mo&#x2014;V&#x2014;Nb&#x2014;Te or metal elements Mo&#x2014;V&#x2014;Nb&#x2014;Sb. The powder of the metallic Te or metallic Sb obtained by grinding preferably has a mode size of not more than 20 &#x3bc;m. By using the metal oxide obtained by the invention as a catalyst, it is possible to produce acrylic acid in a high yield of 35% or more from propane by a one-stage oxidation reaction.

A process for preparing a metal oxide catalyst for acrylic acid production which comprises calcining a metal compound mixture at 400&deg; C. or higher to prepare a metal oxide powder comprising Mo, V, Sb, and at least one element selected from the group consisting of Nb and Ta, and supporting a compound comprising at least one element selected from the group consisting of Sb, Tl, Se, As, Pb, Sn, Ag, Cu, Ru, and Rh on the metal oxide powder, and a process for producing acrylic acid by gas phase oxidation of propane using the catalyst.

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Nagoya, Japan

Hiroshi Niizuma