Mitsui Toatsu Chemicals, Incorporated

Mitsui Chemicals, Inc.

Sun Medical Co., Ltd.

Shofu Inc.

Mitsubishi Paper Mills Limited

Yoshimitsu Tanabe

Akihiro Yamaguchi

Keizaburo Yamaguchi

Kenichi Sugimoto

Kiyoharu Hasegawa

Masakatsu Nakatsuka

Tatsuhiro Urakami

Masahiro Ohta

Norimasa Yamaya

Yukihiro Yoshikawa

Midori Yamazaki

Atsuo Otsuji

Kazuyoshi Kikkawa

Shoji Tamai

Makoto Asano

Teruyuki Nagata

Saburo Kawashima

Masaru Wada

Masami Arata

Takeshi Nishimura

Hiroshi Naruse

Osamu Kohgo

Kazuhiko Yoshinaga

Shunsuke Miyata

Tatsuya Ori

Shinsuke Kinoshita

Takenori Mitamura

Masataka Miyasato

Toshihiro Motoshima

Hiroki Murai

Hideyuki Ueki

Masuji Tsuchikawa

Sayaka Miyamori

Yoshiaki Katsura

Takeshi Yokoyama

Yoshihisa Kamimoto

Chidzuru Inami

Hirohisa Shimizu

Yuki Kobayashi

Jotaro Kida

Masayuki Furuya

Masatoshi Takagi

Fumio Okumura

Naomasa Koike

Hiroyuki Akahori

Takayuki Kubo

Koichi Machida

Nobuhiro Takizawa

Mikio Kitahara

Motoyuki Torikai

Koutarou Asahina

Tomoko Kamashita

Tatshuiro Urakami

A dental adhesive curable composition containing a polymerizable monomer including a polymerizable monomer represented by formula (1') and defined amounts of an acidic group-containing polymerizable monomer, a polymerization initiator containing a peroxide and a photopolymerization initiator, and a reductant containing a sulfinic acid compound and/or a salt thereof, and a filler: wherein the R groups, n and m are defined. A dental adhesive curable kit and a mobile tooth fixing material are also provided.

Dental polymerizable monomers, compositions, adhesive dental materials and kits

The present invention provides polymerizable monomers represented by the following general formula (1) that are useful as dental materials.  In the general formula (1), Ris a divalent Caromatic hydrocarbon group or a divalent Coptionally bridged cyclic hydrocarbon group, Rand Rare each a hydrogen atom or a Calkyl group, R, R, Rand Rare each a hydrogen atom or a hydrocarbon group, Rand Rare each a hydrogen atom or a methyl group, m and n are each independently 0 to 4, and Rand Rare each independently a Clinear alkylene or Clinear oxyalkylene group optionally substituted with a Calkyl group or a (meth)acryloyloxymethylene group in place of a hydrogen atom.

The present invention provides a dental material, a dental material composition and a dental restorative material that exhibit small polymerization shrinkage particularly during curing and are producible at low cost on the industrial scale. The dental material of the present invention includes a specific urethane (meth)acrylic compound represented by Formula (1) described below. 

Dental material, dental material composition, dental restorative material, and cured product

The present invention provides a novel compound and a composition including the compound that exhibit small polymerization shrinkage particularly during curing and are producible at low cost on the industrial scale. The compound of the present invention is represented by Formula (1): 

Compound, composition comprising the compound and cured product

A color developer composition comprising (A) a color developer containing a polyvalent metal salt of a salicylic acid derivative, and (B) a polyester polyol having in the molecule skeleton at least one carbonate bond or ester bond, and a derivative thereof, an aqueous dispersion and a color developing ink using this color developer composition, and a recording sheet having a layer containing this color developer composition on a base material.

Color developer composition, aqueous dispersion, recording sheet and color developing ink

Provided are a color-developing agent comprising a multivalent metal salt of a salicylic acid derivative and a sulfonated phenol and/or a metal salt thereof and having excellent initial and ultimate color-developing capacities and improved waterproofness; and a color-developing sheet making use of the color-developing agent.

Color-developing agents and color-developing sheets

A process for preparing a polyvalent metal salt of a salicylic acid resin which comprises the steps of reacting salicylic acid or its derivative with styrene or its derivative at a temperature of -20.degree. C. or higher but lower than 40.degree. C. in the presence of sulfuric acid, and then reacting the resulting reaction product with a polyvalent metal compound; an aqueous dispersion in which the polyvalent metal salt of the resin is dispersed in water; and a developing sheet in which the polyvalent metal salt of the salicylic acid resin is used.

Polyvalent metal salt of salicyclic acid resin and process for preparing

Disclosed is an aromatic diamine compound represented by the formula (I) ##STR1## wherein R is H or CH.sub.3. Also disclosed is a bismaleimide compound represented by the formula (IV) ##STR2## wherein R is H or CH.sub.3, A resin forming composition comprising these compounds is also disclosed. The compounds are useful as raw materials for resins, and the resin forming composition and the resin can provide excellent heat resistance and impact resistance and low hygroscopicity.

Bismaleimide compounds

The heat-sensitive recording material disclosed comprises a colorless or pale colored dyestuff precursor, one or more salicylic acid derivative of the formula (1) or metal salt of the derivative and an aliphatic amide compound having 18.about.60 carbon atoms in molecular structure, and is excellent in thermal response and preservation stability of white portions and images. ##STR1## wherein X.sub.1 and X.sub.2 are a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an aralkyl group or an aryl group, Y.sub.1 and Y.sub.2 are an oxygen atom or a sulfur atom, R.sub.1 is a hydrogen atom, an alkyl group, an aralkyl group or an aryl group, and R.sub.2 is an alkyl group, an alkenyl group, an aralkyl group or an aryl group.

Salicylic acid derivatives

A color-developing composition comprises a multi-valent-metal-modified salicylic acid resin (Resin A) and a polycondensation resin (resin B) at a weight ratio of 90-30 to 10-70. Resin A is composed of 5-35 mole % of a structural unit (I) and 65-95 mole % of at least one structural unit (II) or 65-95 mole % of a coupled structural unit of at least one unit (II) and at least one unit (III) and has a weight-average molecular weight of 350-5,000. Resin B is composed of the unit (II) and/or the unit (III) and has a weight-average molecular weight of 350-5,000. ##STR1## wherein Z represents M/m, M being a metal ion of m valence and m being an integer; R.sub.1 and R.sub.2 represent H or a C.sub.1-12 alkyl, aralkyl, aryl or cycloalkyl group; R.sub.3 and R.sub.6 represent H or a C.sub.1-4 alkyl group; and R.sub.4 and R.sub.5 represent H or CH.sub.3.

Color-developing compositions and their use

Heat-sensitive recording materials contain an electron-donating chromogenic compound and an electron-attracting compound. The recording materials also contain at least one compound represented by the following formula: ##STR1## wherein R.sub.1 and R.sub.3 mean a hydrogen atom or an alkyl, aralkyl or aryl group, R.sub.2 and R.sub.4 denote an alkyl, alkenyl, aralkyl or aryl group, X.sub.1, X.sub.2, Y.sub.1 and Y.sub.2 stand for an oxygen or a sulfur atom, and --Z.sub.1 -- and --Z.sub.2 -- are a specific aromatic group. Also provided are phenol compounds represented by the following formula: ##STR2## wherein R.sub.1, R.sub.2, X.sub.1 and Y.sub.1 have the same meanings as defined above; R.sub.5 and R.sub.6 are a hydrogen or halogen atom or an alkyl, alkoxy, aralkyl, aryl or hydroxyl group; p and q stand for an integer of 1-4; R.sub.5 and R.sub.6 may be either the same or different when p and q represent an integer of 2 or greater; and --Z.sub.3 -- means a specific divalent group.

Heat-sensitive recording materials and phenol compounds

Aromatic diamine compounds, bismalemide compounds, thermosetting resin

A color-developing sheet using, as a color developer, polyvalent-metal-modified products of salicylic acid compounds composed mainly of a 3,5-di(.alpha.-methylbenzyl)salicylic acid derivative obtained by reacting a salicylic acid ester with an .alpha.-methylbenzyl halide in the presence of an acid catalyst and hydrolyzing the reaction product. Said color-developing sheet has excellent color developability at low temperatures and gives a color of excellent water resistance.

Process for producing 3,5-di(.alpha.-methylbenzyl)salicylic acid

A heat-sensitive recording material comprising a color forming, electron donating compound and a salicylic acid derivative represented by the formula (1): ##STR1## wherein X.sub.1 and X.sub.2 are a hydrogen atom, an alkyl group, an alkoxy group, an aralkyl group, an aryl group or a halogen atom, Y.sub.1 and Y.sub.2 are an oxygen atom or a sulfur atom, R.sub.1 is a hydrogen atom, an alkyl group, an aralkyl group or an aryl group , and R.sub.2 is an alkyl group, an alkenyl group, an aralkyl group or an aryl group, and/or a metal salt of the salicylic acid derivative as an electron accepting compound, is disclosed.

Salicylic acid derivatives, the process for preparing the same and the

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Yokohama, Japan

Yoshimitsu Tanabe