Abstract: A curable resin composition which exhibits excellent hardness of their curing products as well as storage stability is provided, and a simple method to obtain acrylated resins is provided. The composition comprises a curable oligomer which has an acryloyl group and a substituted methacrylate group represented by the following structure The process comprises a reaction step of reacting at least one monomeric multifunctional acrylate in the presence of a tertiary organic phosphine.

Abstract: A curable resin composition which exhibits excellent hardness of their curing products as well as storage stability is provided, and a simple method to obtain acrylated resins is provided. The composition comprises a curable oligomer which has an acryloyl group and a substituted methacrylate group represented by the following structure The process comprises a reaction step of reacting at least one monomeric multifunctional acrylate in the presence of a tertiary organic phosphine.

Abstract: The invention describes curable liquid acryloyl group containing compositions, which are produced by reacting monofunctional vinyl compounds and multifunctional acrylic esters with ?-dicarbonyl group containing compounds having two activated hydrogen atoms in its methylene position. These material can be polymerized or crosslinked by free radical polymerization, UV (ultraviolet) or electron-beam radiation. The curable liquid compositions are suitable for producing curable coatings, printing inks, adhesives, or moulding compositions.

Abstract: A novel compound represented by the general formula (I), and a nematic liquid crystal composition incorporating the same. A compound represented by the general formula (I) can be produced industrially extremely easily, as shown in the examples, displays superior compatibility with current general purpose host liquid crystals as a nematic phase, and also shows little crystal precipitation at low temperatures. Moreover, by addition of a small amount of such a compound to a host liquid crystal, the liquid crystal temperature range at low temperatures can be effectively widened without any significant worsening of the various characteristics of the liquid crystal material. Consequently, a compound of the present invention is an extremely useful liquid crystal material which is suitable for various liquid crystal display elements which require a broad operating temperature range.

Abstract: The invention relates to a curable composition which can be cured at low temperatures and which exhibits at the same time good storage stability at room temperature, comprising: (i) a compound (A) having at least two unsaturated groups which are activated for Michael addition, (ii) a compound (B) having at least two activated hydrogen atoms, (iii) a tertiary organic phosphine (C), and (iv) a carboxylic acid (D).

Abstract: A photoinitiator is provided which exhibits excellent photosensitivity, yields colorless products, and is usable in thick layer UV curable coating. A novel chemical compound is also provided which is usable for the photoinitator. Photocurable composition is also provided which has these properties. The photoinitiator consists essentially of a compound having a molecular weight of 1000 or less, and having a chemical structure represented by the following formula (1), wherein R3 and R4 independently denote a specific alkyl group, and R1 and R2 independently denote an electron attracting group or a specific alkyl group, and weight percentage of a chemical structure element represented by the following formula (2), which is expressed in formula (1) based on the total molecular weight of the compound, is 17% to 54% by mass.

Abstract: The present invention discloses a decahydronaphthalene derivative represented by general formula (I): a liquid crystal composition in which it is contained, and a liquid crystal device in which it is used. The novel decahydronaphthalene derivative of the present invention can be produced industrially extremely easily as shown in the examples, and by adding a small amount to a base liquid crystal, it is possible to have effects that expand the nematic phase temperature range, thereby improving its various characteristics as a nematic liquid crystal. Moreover, the novel decahydronaphthalene derivative of the present invention also has superior co-solubility with base liquid crystals generally used at present. Thus, it is suitable for various types of liquid crystal devices requiring a wide operating temperature range, and is extremely useful as a liquid crystal material.

Abstract: A curable resin composition which exhibits excellent hardness of their curing products as well as storage stability is provided, and a simple method to obtain acrylated resins is provided. The composition comprises a curable oligomer which has an acryloyl group and a substituted methacrylate group represented by the following structure The process comprises a reaction step of reacting at least one monomeric multifunctional acrylate in the presence of a tertiary organic phosphine.

Abstract: A catalyst suitable for crosslinking reaction of a compound containing ?,?-unsaturated carbonyl groups and a compound containing a CH-acidic methylene group is provided. A curable mixture comprises at least one compound containing at least two ?,?-unsaturated carbonyl groups and at least one compound containing at least one CH-acidic methylene group and at least one trialkylphosphine.

Abstract: A curable resin composition which exhibits no drawbacks such as yellowing and exhibits excellent hydrolysis sensitivity is provided, and a process for preparing curable oligomers and polymers which has foregoing properties is provided. The composition comprises a curable oligomer or polymer, wherein the oligomer or polymer has an acryloyl group, a ?-dicarbonyl group having a chemical structure part represented by any of the following structures, and a substituted methacrylate group represented by the following structure. The process comprises a reaction step of reacting at least one multifunctional monomeric acrylate with at least one compound having at least one ?-dicarbonyl group in the presence of a tertiary organic phosphine.

Abstract: A curable resin composition which exhibits no drawbacks such as yellowing and exhibits excellent hydrolysis sensitivity is provided, and a process for preparing curable oligomers and polymers which has foregoing properties is provided.

Abstract: A tetrahydronaphthalene derivative represented by the general formula (I) and a liquid crystal composition containing the same. A compound represented by the general formula (I) shows superior liquid crystallinity and co-solubility with conventional liquid crystal compounds and compositions. Furthermore, addition of such a compound enables the threshold voltage to be significantly reduced with almost no deleterious effect on the responsiveness. In addition, a compound of the present invention can also be easily produced industrially, is colorless, and is chemically stable. Consequently, liquid crystal compositions containing such a compound are extremely useful as liquid crystals, and are particularly suitable for liquid crystal displays requiring a wide operating temperature range, low voltage driving and a high response speed.

Abstract: A curable resin composition which exhibits no drawbacks such as yellowing and exhibits excellent hydrolysis sensitivity is provided, and a process for preparing curable oligomers and polymers which has foregoing properties is provided.

Abstract: A curable resin composition which exhibits excellent hardness of their curing products as well as storage stability is provided, and a simple method to obtain acrylated resins is provided.

Abstract: A catalyst suitable for crosslinking reaction of a compound containing &agr;,&bgr;-unsaturated carbonyl groups and a compound containing a CH-acidic methylene group is provided. A curable mixture comprises at least one compound containing at least two &agr;,&bgr;-unsaturated carbonyl groups and at least one compound containing at least one CH-acidic methylene group and at least one trialkylphosphine.

Abstract: Urea derivatives of formula 1 for the hardening of hydroxyl group-containing polymers, wherein each of R1-R7 is a hydrogen atom or a linear or branched C1-C4-alkyl group, preferably methyl, ethyl, n-propyl, isopropyl, n-butyl or isobutyl, R1-R7 being identical or different, and R8 is a linear or branched C1-C6-alkyl group, preferably methyl, ethyl, n-propyl, isopropyl, n-butyl or isobutyl. The compounds 1 are prepared by reacting a compound 2 wherein R9 is a member selected from the group consisting of —CHO, —CH(OH)—OR8 and —CH(OH)2 with a urea derivative 3 optionally followed by etherification of the reaction product with an alcohol X—OH, wherein X is a linear or branched C1-C4-alkyl group.

Abstract: Urea derivatives of formula 1 for the hardening of hydroxyl group-containing polymers.

Abstract: A process is described for the production of 3-alkyl-3-hydroxymethyloxetanes of the general formula (1), ##STR1## in which R.sup.1 denotes a linear or branched C.sub.1 -C.sub.12 alkyl group, which process comprises reacting a trimethylolalkane of the general formula (2),(HO--CH.sub.2).sub.3 C--R.sup.1 (2)in which R.sup.1 is defined as above, with a dialkyl carbonate of the general formula (3),R.sup.2 --O--(C.dbd.O)--O--R.sup.2 (3)in which R.sup.2 denotes a linear or branched C.sub.1 -C.sub.4 alkyl group, in the presence of a basic catalyst, wherein in a first stage the reaction mixture is stirred for at least 6 hours with refluxing at a temperature of 90-120.degree. C., in a second stage the alcohol formed R.sub.2 OH is distilled off at the same temperature and in a third stage the product formed is decarboxylated and deoligomerised at a temperature of 125-150.degree. C. and the desired 3-alkyl-3-hydroxymethyloxetane is simultaneously distilled off.