Dainippon Ink and Chemicals, Incorporated

Dic Corporation

Rainer Bruno Frings

Gerwald F Grahe

Haruyoshi Takatsu

Sadao Takehara

Cornelia Pithart

Shinji Ogawa

Makoto Negishi

Yutaka Nagashima

Hiroyuki Ohnishi

Shigeru Komazaki

Christine Fugger

Helmut Hartl

Toshihiro Ooki

Kiyofumi Takeuchi

Tetsuo Kusumoto

Naoki Obi

Yasuhiro Takada

Yoshitaka Saito

Koujirou Tanaka

Tatsuo Kawara

Shinichi Nonaka

Kouichi Yokota

Ou Shibata

Masaru Imai

Joji Kawamura

Carola Jaroszewski

Shin-ichi Nonaka

A hyperbranched polyether polyol obtained by a ring-opening reaction between a hydroxyalkyloxetane (a1) and a monofunctional epoxy compound (a2), wherein the polyether polyol includes a primary hydroxyl group (H1) and a secondary hydroxyl group (H2) in the molecular structure thereof, and has a number average molecular weight (Mn) of 1,000 to 4,000 and a hydroxyl value of 150 to 350 mg&#xb7;KOH/g.

Hyperbranched polyether polyol and urethane resin composition

The present invention provides a cation-polymerizable resin composition comprising (A) a multi-branched polyether polyol obtained from a ring-opening reaction of (a1) a hydroxyalkyloxetane and (a2) an epoxy compound having one epoxy group, (B) an alicyclic epoxy compound having at least two alicyclic epoxy groups, and (C) an acid generator, which may be used in various uses including, for example, an adhesive agent or tackiness agent for optical elements, various kinds of coating agents and the like.

Cation-polymerizable resin composition containing multi-branched polyether polyol, adhesive agent comprising the composition, and laminate and polarizing plate using the adhesive agent

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.

Fused ring compound

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.

Decahydronaphthalene derivative

The invention relates to: 4-methylene-1,3-dioxolanes of the general formula (I)wherein R1 denotes hydrogen, C-C-cycloalkyl or C-C-alkyl; m and n, which may be the same or different, denote 0 or 1, whereby m&#x2266;n, o denotes 2, 3 or 4 depending on the valency of the group X; and X denotes a C&#x2014;C single bond, straight-chain or branched C-C-alkylene, C-C-cycloalkylene, C-C-arylalkylene, &#x2014;CH(OCHCH)OCH&#x2014;, &#x2014;CH(OCH(CH)CH)OCH&#x2014;, wherein p is an integer from 0 to 100; a process for their production; and intermediate products used. Moreover, compositions capable of emission-free, photocationic cross-linking, which comprise 4-methylene-1,3-dioxolanes of the general formula (I) and their use for the production of solvent-resistant and transparent films.

4-methylene-1,3-dioxolanes as cross-linking agents

A one-step polymerization process, leading directly to highly branched polyesters with unsaturated, either acrylate or sorbate end groups is described, which is based on the Diels-Alder reaction of polyfunctional sorbic esters with acrylates in defined ratios. A preferred embodiment of the invention is the Diels-Alder polymerization in aqueous emulsion.

Method of producing highly branched polyesters with unsaturated end groups

New photocationic photoinitiator combinations are described that consist of 2,4,6-triarylpyrylium salts with non-nucleophilic anions and electron donors, that are able rapidly to crosslink unpigmented as well as pigmented mixtures based on cycloaliphatic epoxides to form colourless layers such as lacquers and printing inks without generating interfering and toxic emissions.

Photocationic initiator combinations

Compound having tetrahydronaphthalene skeleton and liquid crystal composition containing same

4-methylene-1,3-dioxolanes having functional groups

The production is described of unsaturated polyesters, which exclusively contain maleate groups in their main chain, by the ring-opening polymerization of epoxides, such as glycidyl ethers, glycidyl esters and olefine epoxides, with &agr;,&bgr;-unsaturated anhydrides, preferably such as maleic anhydride, both on their own and in admixture with other cyclic anydrides, in the presence of a Zn carboxylate. The polyesters which are thus produced are characterized by high molecular weights and a narrow molecular weight distribution. Polymerization can be effected between 50 and 120&deg; C., but is preferably effected between 60 and 90&deg; C., either in the melt or in a solvent. Unsaturated reactive thinners, which after the addition of suitable radical initiators react thermally or photochemically with the polyesters to form lacquers, cast parts or fiber-reinforced composite materials, can also be employed as solvents. The preferred crosslinking agents for the polyesters are mono- and polyfunctional acrylates, methacrylates, vinyl ethers and vinyl esters. The polyesters can also be completely or partially isomerized, either thermally or by catalysis, to form polyesters which comprised fumarate groups in their main chain.

Polyesters which contain maleate groups

The invention relates to bismaleimides comprising mesogenic groups which consist, corresponding to (I), of two reactive terminal maleimide groups which are linked via linear or singly alkyl-substituted alkylene chains A, which are linked to an aromatic mesogen M via ester, amide or ether groups,

Bismaleimides comprising mesogenic groups

An initiator composition for polymerizing unsaturated monomers, comprising a component (A) which is a mixture of

Initiator composition for polymerizing unsaturated monomers

The invention concerns a process for the production of block copolymers or aqueous dispersions and emulsions thereof, whereby azo macroinitiators are reacted with radical-polymerizable monomers or a mixture of several radical-polymerizable monomers. The azo macroinitiators are obtained by reacting simple reactive azo compounds with prepolymers with a molecular weight between 400 and 20000, which possess at least 2 functional groups, e.g. polyurethanes or polyesters. The aqueous block copolymer dispersions and emulsions produced according to the invention are suitable for use for the production of paints, adhesives etc.

Process for production of azo macroinitiators for the synthesis of block

Processes for production of azo macroinitiators for the synthesis of

A thermally curable mixture contains 10-70% by weight of reactive compounds, 0.05-2% by weight of at least one basic catalyst, and at least one solvent. The reactive compounds are consisting essentially of a first reactive compound and a second reactive compound at a molar ratio between 1:1 and 1:10. The first reactive compound is a formamide selected from the group consisting of hydroxyformamides, di-formamides and polyformamides, and the second reactive compound is at least one compound having an epoxy equivalent between 100 and 800 g KOH per mole epoxy group, selected from a group of aromatic di-glycidylethers and aromatic poly-glycidylethers. The basic catalyst is at least one chemical agent selected from the group consisting of tertiary ammonium salts, tertiary aromatic amines, and tertiary heterocyclic amines. The solvent is at least one chemical compound selected from the group consisting of aliphatic alcohols, ether alcohols, diether, and tertiary amides.

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Berlin, Germany

Rainer Bruno Frings