Mitsubishi Paper Mills Limited

Showa Denko K.k.

Sanyo Denki Co., Ltd.

Tokyo Printing Ink Mfg. Co., Ltd.

Haruhiko Ikeda

Hideo Miyata

Shigetoshi Hiraishi

Yotaro Hattori

Katsumi Murofushi

Masahiro Higuchi

Hirokazu Ohkura

Katsuro Urakawa

Katsutoshi Ohno

Masahiro Miyauchi

Hirokazu Tsukahara

Fumio Okumura

Akinori Okada

Koji Suematsu

Kazuhiro Handa

Hisashi Wakasugi

Satoshi Atou

Fujio Takasaki

Hitoshi Mikami

Disclosed are a scratch color-developable ink comprising an electron-donating colorless or light-color dye precursor, an electron-accepting color developer and a varnish, wherein a solid particle component contained therein has an average particle diameter of 0.3 to 25 &#x3bc;m, a scratch color-developable ink comprising an electron-donating colorless or light-color dye precursor, an electron-accepting color developer and a varnish, wherein an azaphthalide compound is contained as the electron-donating colorless or light-color dye precursor, and an invisible information printed sheet obtained by printing invisible information on a support with the above scratch color-developable ink. The above scratch color-developable ink makes invisible information visible easily by scratching with a finger nail although the color of an invisible information printed portion is hard to develop by frictional contact during usual handling, gives a high developed color intensity and is free from the occurrence of dust during the visualization of invisible information.

Scratch color-developable ink and invisible information printed sheet

It is an object of the present invention to provide a photopolymerization initiator composition having high sensitivity and excellent storage properties, a photosensitive composition containing the photopolymerization initiator composition, and a thiourethane compound preferable for the photopolymerization initiator composition. The thiourethane compound of the present invention has 2 to 6 units each of which contains a moiety represented by the following formula (i) and a moiety represented by the following formula (ii). wherein Ris a hydrogen atom or a methyl group, and Ris &#x2014;CO&#x2014;, &#x2014;COO&#x2014; or &#x2014;COOR&#x2014; (wherein Ris an alkylene group of 2 to 6 carbon atoms).

Thiourethane compound and photosensitive resin composition

Curable compositions have high sensitivity and excellent developability, and further have good storage properties as required. The compositions include a hydroxythiol compound represented by Formula (1) below and a compound with an ethylenically unsaturated double bond:  wherein Rand Rare each independently a hydrogen atom, a C1-10 alkyl group or an aromatic ring; X is an aliphatic group, an aromatic ring-containing group or a heterocyclic ring-containing group; Y is an ester bond; k and l are each an integer ranging from 1 to 20; m is an integer of 0, 1 or 2; and n is 0 or 1.

Curable compositions containing hydroxythiol compound, and cured products thereof

The present invention provides an industrially advantageous process for preparing nucleus-halogenated methylbenzyl alcohol which is a useful substance as a raw material, an intermediate for manufacturing medicines, agricultural chemicals, etc. The process of the present invention for preparing nucleus-halogenated methylbenzyl alcohol represented by the following formula (II) includes hydrogenating nucleus-halogenated benzene dicarbaldehyde represented by the following formula (I); wherein m is an integer of 0 to 3, and n is an integer of 1 to 4, with the proviso that m+n is an integer of 1 to 4, wherein m and n are the same as those in the formula (I). 

Production process of nucleus-halogenated methylbenzyl alcohol

The present invention relates to a curable composition having high adhesiveness and transparency, comprising a thiol compound containing two or more groups represented by formula (1): wherein the symbols in the formula have the meanings as described in the specification; andan urethane compound containing an ethylenically unsaturated double bond represented by formula (2): wherein the symbols in the formula have the meanings as described in the specification.

Curable composition containing thiol compound

A process for preparing tetrafluorobenzene carbaldehyde alkyl acetal represented by the following formula (II), comprising reducing tetrafluorocyanobenzene represented by the following formula (I) with a metal catalyst containing a platinum group metal in the presence of an alkyl alcohol represented by R&#x2014;OH (R is an alkyl group of 1 to 4 carbon atoms) and an acid; (I) wherein m is 1 or 2, n is 0 or 1, and m+n is 2, (II) wherein m and n are the same as those in the formula (I), and R is an alkyl group of 1 to 4 carbon atoms. 

Process for preparing tetrafluorobenzene carbaldehyde alkyl acetal

A power failure-free power supply apparatus capable of minimizing time required for parallel operation of a power rectifier and a power rectifier/inverter, to thereby minimize a deterioration in operational reliability. The power rectifier converts an output of an AC power supply into DC power. A power inverter converts DC power into AC one. The power rectifier/inverter carries out rectifying/inverting operation. An output of the power rectifier and an AC output of the power rectifier/inverter are fed through a change-over unit to a load. Operation of switches is controlled depending on a detection signal of a current detector for detecting a charging current of a storage battery. A control unit permits parallel operation of the power rectifier and power rectifier/inverter when a residual capacity of the storage battery is at an increased level and permits the storage battery to be charged when the residual capacity is at a reduced level. An increase in charging current during the parallel operation minimizes time required for the parallel operation.

Power failure-free power supply apparatus

A heat sensitive recording material is provided which can be simply prevented from falsification and is excellent in contrast between fixed portion and image portion, and a recording method using it is further provided. Moreover, there is provided a heat sensitive recording material capable of carrying out multicolor recording which is excellent in contrast of the image portions, density of the image portions, and image storage stability. That is, the present invention provides a heat sensitive recording material comprising a support and, provided thereon, one or a plurality of heat sensitive recording layers which contains at least one water-insoluble resin selected from the group consisting of an aromatic resin, a resin having a low or no acid value and a resin having a carbonyl group and an alicyclic unit, a heat sensitive recording material in which substantially no crystallized color developer is contained in a mixed melt obtained by mixing a given amount of the resin and a given amount the color developer, heating and melting the mixture and, then, leaving the melt to cool, and a recording method which carries out simultaneously the formation of an image portion by applying a low energy and the formation of a fixed portion by applying a high energy by a heating means on the above heat sensitive recording material by a thermal head.

Heat sensitive recording material and recording method using the same

A heat-sensitive recording material containing a special sensitizer in a heat-sensitive recording layer is excellent in thermal response properties and sensitivity.

Heat-sensitive recording material

A heat-sensitive recording material containing a special sensitizer in a heat-sensitive recording layer formed on a support is excellent in thermal response.

A heat-sensitive recording material containing a special sensitizer in a heat-sensitive recording layer is excellent in thermal response and sensitivity.

Disclosed is a colorless dye for use in recording materials comprising a compound represented by the general formula: ##STR1## Said recording materials are of the types which utilize a color developing reaction between an electron-donating colorless dye and an electron-accepting color developer, such as, carbonless pressure-sensitive recording materials, thermosensitive recording materials, etc.

Colorless carbazole dyes for recording materials

Heat-sensitive recording materials comprising a colorless or light-colored dye precursor and a color developer capable of developing a color of the dye precursor, upon reaction with said dye precursor with heating, further contain as sensitizers specific styryl-containing compounds. By incorporating these specific sensitizers, the heat-sensitive recording materials provide excellent thermal response and high sensitivity.

Heat sensitive recording material

A highly sensitive thermal recording material excellent in response to heat is obtained by incorporating as a sensitizer at least one compound into a thermal printing material comprising a usually colorless or light-colored dye precursor and a developer which reacts with each other to develop color on heating, said compound being selected from the following compounds represented by the following general formulas (I), (II) and (III): ##STR1##

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Kawasaki, Japan

Haruhiko Ikeda