Showa Denko K.k.

Mina Onishi

Hirotoshi Kamata

Yoshimitsu Ishihara

Katsumi Murofushi

Yukihiko Azuma

Hirofumi Inoue

Tsuyoshi Katoh

Tomokazu Sugawara

Fumiaki Naka

There is provided an active energy ray-curable composition having excellent storage stability. The active energy ray-curable composition includes: active energy ray-curable compound (A) having an unsaturated ethylenic double bond; thiol compound (B) having two or more mercapto groups in one molecule; reaction inhibitor (C) configured to inhibit a reaction between the unsaturated ethylenic double bond and the mercapto groups; radical polymerization inhibitor (D); and water (E), wherein the content of water (E) is 0.05 ppm by mass or more and less than 1% by mass. When the total content of active energy ray-curable compound (A) and thiol compound (B) is 100 parts by mass, the content of reaction inhibitor (C) is 0.005 parts by mass or more and 10 parts by mass or less, and the content of radical polymerization inhibitor (D) is 0.005 parts by mass or more and 5 parts by mass or less.

Active energy ray-curable composition and cured product thereof

The present invention provides an electrostatic discharge protector capable of protecting electronic circuit boards having various designs from electrostatic discharge freely, simply and easily. The electrostatic discharge protector of the present invention comprises at least three conductive members containing one pair of electrodes and the conductive members other than the electrodes, the conductive members are each disposed in such a way that the gap between one conductive member and the other conductive member has a width of 0.1 to 10 &#x3bc;m, an insulating member is disposed and embedded in at least one of gaps having a width of 0.1 to 10 &#x3bc;m which are adjacent to each conductive member and one electrode is connected to the other electrode paired with the one electrode through the insulating member and the conductive members other than electrodes.

Electrostatic discharge protector

A discharge gap filling composition which includes metal powders (A) and a binder component (B), wherein surfaces of primary particles of the metal powders (A) are coated with a film composed of a metal oxide, and the primary particles of the metal powders (A) have a flake form. An electrostatic discharge protector is obtained using the composition.

Discharge gap filling composition and electrostatic discharge protector

The present invention provides an electrostatic discharge protector capable of taking measures for electrostatic discharge against electronic wiring boards having various designs freely, simply and easily, having excellent accuracy of regulating an operating voltage and capable of being downsized and decreased on its cost, and also provides a resin composition for a discharge gap capable of preparing the electrostatic discharge protector. The resin composition for filling a discharge gap of an electrostatic discharge protector comprises a resin having a urethane structure represented by the formula (1): wherein plural R's are each independently an alkylene group of 1 to 18 carbon atoms, X is a bivalent organic group and m and n are each independently an integer of 1 to 20. The electrostatic discharge protector is obtainable by filling the discharge gap with the resin composition. The discharge gap has a width of 2 to 10 &#x3bc;m.

Resin composition for filling discharge gap and electrostatic discharge protector

The present invention relates to a thiol compound represented by formula (1): wherein R, Rand n have the same meanings as in the specification, method for producing the compound, and to a photosensitive composition and a black matrix resist composition using the same which have high sensitivity and excellent property of retaining a line width in fine line patterns at the time of alkaline development, that is, being excellent in development latitude. 

Thiol compound and photosensitive composition using the same

A photopolymerization initiator composition containing a thiol compound having a mercapto group-containing group that has at least one substituent on the carbon atoms on carbon atom(s) at the &#x3b1;- and/or &#x3b2;-position with respect to the mercapto group and a photopolymerization initiator; a photosensitive composition containing the composition; and a novel thiol compound for use in these compositions. The photosensitive composition containing the photopolymerizazion initiator composition of the present invention has high sensitivity and excellent storage stability and enables reduction in cost due by increasing productivity.

Growing community of inventors

Tokyo, Japan

Mina Onishi