537 results about "Oxetane" patented technology

Liquid radiation curable resin compositions for additive manufacturing comprising: from about 5 to about 30 wt % of an oxetane; a (meth)acrylate component; a cationic photoinitiator; a free-radical photoinitiator; and from about 50 to about 80 wt % of an epoxy, which further comprises a cycloaliphatic epoxy component, and an epoxy component having an aromatic glycidyl ether group, wherein the majority of the epoxy is the cycloaliphatic epoxy component are described and claimed. Also described and claimed is a process for using the liquid radiation curable resins for additive manufacturing to create molds for dental aligners, and the three-dimensional molds made from the liquid radiation curable resins for additive manufacturing.

An inkjet recording method includes using ink for inkjet recording containing a hydrodispersible colorant, a surfactant, water, and an organic solvent containing a polyol, an amide compound represented by the following Formula I, and an oxetane compound represented by the following Formula II; using a recording medium having a particular transfer amount of highly deionized water as measured by an automatic scanning absorptometer; and forming an image on the recording medium with the ink, wherein the ink has a particular wettability, where γ′ represents dynamic surface tension as measured by maximum bubble pressure technique and θ represents a contact angle,

A homeotropic alignment liquid crystal film is provided with a liquid crystalline substance containing a side chain liquid crystalline compound having an oxetanyl group, as a constituent, aligned homeotropically on an alignment substrate while being in a liquid crystal state and fixed in the homeotropic alignment by allowing the oxetanyl group to react. Thus, the homeotropic alignment liquid crystal film can be stably produced without necessitating a complicated step such as light irradiation under an inert gas atmosphere and is excellent in alignment retainability after being fixed in the homeotropic alignment and in mechanical strength.

There is provided a photosensitive composition excellent in photo-curability which comprises an epoxy compound having two or more epoxy groups, a polynuclear phenol compound having a specific structure and an energy beam-sensitive cationic polymerization initiator, and optionally a predetermined percentage of a hydroxyl group-containing compound having one or more hydroxyl groups and one or more of at least one of a vinyl ether group and an oxetanyl group in a molecule, and a cured product of the same whose film is excellent in adhesion to various substrates, water resistance and flexibility.

PURPOSE: To easily obtain the titled alcohol wherein one of both terminals is quantitatively capped, at a low cost, by polymerizing THF in the presence of an active hydrogen-containing compound using a Lewis acid and a cyclic ether as polymerization initiators. CONSTITUTION: A polyether monoalcohol is produced by polymerizing tetrahydrofuran in the presence of a compound containing one active hydrogen atom in one molecule using a Lewis acid and a 3-4-membered cyclic ether. The active hydrogen-containing compound is a compound having hydroxyl group, carboxyl group or thiol group, e.g. methanol, cyclohexanol, etc., and the ether is selected from epoxides or oxetanes.

The present invention provides an insulating sheet which is used for bonding a heat conductor having a thermal conductivity of 10 W/m·K or higher to an electrically conductive layer. The handleability of the insulating sheet is excellent when it is uncured, and a cured product of the insulating sheet has higher adhesion, heat resistance, dielectric breakdown characteristics, and thermal conductivity. The insulating sheet used for bonding a heat conductor having a thermal conductivity of 10 W/m·K or higher to an electrically conductive layer comprises: (A) a polymer having an aromatic skeleton and a weight average molecular weight of 10,000 or more; (B) at least one of an epoxy monomer (B1) having an aromatic skeleton and a weight average molecular weight of 600 or less and an oxetane monomer (B2) having an aromatic skeleton and a weight average molecular weight of 600 or less; (C) a curing agent composed of a phenol resin, an acid anhydride having an aromatic skeleton or an alicyclic skeleton, a hydrogenated product of the acid anhydride, or a modified product of the acid anhydride; and (D) a filler. When the insulating sheet is uncured, the insulating sheet has a glass transition temperature Tg of 25° C. or lower.

Oxetane compounds represented by general formula (1), which are excellent in radical polymerizability and cationic polymerizability and in compatibility and copolymerizability with other copolymerizable monomers; a process for producing the compounds; and an oxetane copolymer which is excellent in compatibility among the monomer units and has a low water absorption and excellent transparency.[In general formula (1), substituent R1 is hydrogen, alkyl, fluorine, fluoroalkyl, allyl, aryl, furyl, or thienyl; substituents R2, R3, and R4 each independently is hydrogen or C1-6 alkyl; and m and n each is an integer of 1 to 10 (provided that not all of R2, R3, and R4 are hydrogen)].

This invention relates to cationically curable sealants that provide low moisture permeability and good adhesive strength after cure. The composition consists essentially of an oxetane compound and a cationic initiator.

The invention discloses an oxetane compound applied to cationic photocuring systems. The oxetane compound is formed by a compound containing at least one hydroxyl group and at least one oxetane groupand halogenated hydrocarbon via nucleophilic substitution reaction, is not sensitive to humidity, and has the advantages of being high in reactivity, low in odor and viscosity, and strong in adhesion.

The invention discloses a method for preparing poly(monothiocarbonate). According to the method, carbon oxysulfide and oxygen-containing monomers are used as raw materials; a catalysis system consisting of initiators and Lewis acid is used; after the bulk polymerization or solution polymerization, poly(monothiocarbonate) is obtained; the oxygen-containing monomers are selected from at least one kind of materials of epoxy compounds, oxetane and 3-substituted oxetane; the initiators are selected from quaternary ammonium salt, quaternary phosphonium salts or organic alkali. The preparation method of synthesizing the poly(monothiocarbonate) through anion ring-opening polymerization by using a catalytic system formed by at least one kind of materials from quaternary ammonium salt, quaternary phosphonium salts or organic alkali, and the Lewis acid; the poly(monothiocarbonate) with the specific chain structures can be obtained through preparation. The catalysis system can be obtained only through compounding; the metal residue and color residue problems do not exist.

The invention discloses an epoxy adhesive for OLED frame encapsulation and a preparation method of the epoxy adhesive. The epoxy adhesive is prepared from the following components in parts by weight:50-80 parts of epoxy resin, 5-10 parts of epoxy diluents, 5-10 parts of flexibilizer, 20-40 parts of filler, 1-5 parts of photoinitiator, 0.1-1 part of antioxidant and 0.3-3 parts of additive. The epoxy resin is one or a mixture of more of cycloaliphatic epoxy resin and bisphenol F epoxy resin. The epoxy diluent is one or a mixture of more of oxetane and aliphatic glycidyl ether. The photoinitiator is a cationic photoinitiator which comprises an iron-arene photoinitiator and a hexafluorophosphate photoinitiator. The epoxy adhesive adopts a curing way that ultraviolet exposure and heating are conducted in sequence, has the advantages of less curing agent residue, less volatile component residue, low curing temperature, strong bonding force, boiling resistance, water vapor resistance, oxygenbarrier performance and the like, and reaches the halogen-free standard.

Novel radiation-curable or photopolymerizable compositions and methods of use thereof as cured coatings are disclosed. The invention pertains to radiation-curable compositions which contain, in addition to typical components of radiation-curable epoxide and oxetane compositions, a free radical photoinitiator.

The invention relates to a radiation curable composition comprising from about 50 wt % to about 70 wt % of a cycloaliphatic diepoxide, from about 5 wt % to about 15 wt % of a polyol, from about 5 wt % to about 15 wt % of an oxetane, from about 10 wt % to about 20 wt % of an aromatic diacrylate, a radical photoinitiator and a cationic photoinitiator. The invention further relates to a process for making a three dimensional article from the resin composition of the invention, to the three-dimensional article itself and to the use of the composition of the invention.

Provided are a liquid-crystal compound and a liquid-crystal composition containing the compound, of which the advantages are that they show nematic hybrid orientation on a rubbed TAC substrate, they are polymerizable in open air and they readily give a polymer having a high degree of polymerization even when exposed to a relatively small total quantity of light. The films formed by photopolymerizing them keep nematic hybrid orientation. The compound is represented by formula (1):

wherein R¹ is a hydrogen or an alkyl; R² is a hydrogen, —OCF₃, etc.; A¹ is a 1,4-phenylene, etc.; A² and A³ are independently a 1,4-cyclohexylene, a 1,4-phenylene, etc.; X¹ is a single bond, —O—, etc.; X² and X³ are independently a single bond, —COO—, —C≡C—, —CONH—, etc.; m is an integer of from 0 to 20; and n is 1 or 0.

An ink composition is provided that includes (A) a pigment other than titanium oxide, (B) a cationically polymerizable compound, and (C) a photo-acid generator, the pigment (A) having a content of 3.5 to 20 wt %, the cationically polymerizable compound (B) containing only an oxirane compound and/or an oxetane compound, the oxirane compound and/or the oxetane compound containing a low-viscosity compound having a viscosity at 25° C. of no greater than 12 mPa·s, and the low-viscosity compound having a total content of 65 to 100 wt % relative to the total weight of the cationically polymerizable compound (B). There is also provided an inkjet recording method that includes (a¹) a step of discharging the ink composition above onto a recording medium and (b¹) a step of curing the ink composition by irradiating the discharged ink composition with actinic radiation.

The present invention provides for a personal care composition suitable for treating hair comprising a composition comprising the reaction product of a) an oxirane or oxetane compound comprising at least two oxirane or oxetane groups; and b) an amino silane having the formula: N(H)(R¹)R²Si(OR³)_3-a-b-c(OR⁴)_a(R⁵Si(OR⁶)d(R⁷)_c)_bR⁸_c with R¹ is chosen from the group consisting of H or a monovalent hydrocarbon radical containing one to 20 carbon atoms; R² is selected from a group consisting of a divalent linear or branched hydrocarbon radical consisting of 1-60 carbons; R⁴ is a hydrocarbon radical that contains 3 to 200 carbon atoms; R⁵ is selected from a group consisting of oxygen or a divalent linear or branched hydrocarbon radical consisting of 1-60 carbons; R³, R⁶, R⁷, and R⁸ and are each independently selected from the group of monovalent linear or branched hydrocarbon radicals having from 1 to 200 carbon atoms; the subscript b is zero or a positive number and has a value ranging from 0 to 3; the subscripts a is zero or appositive number less than 3, the subscripts b and c are zero or positive and have a value ranging from 0 to 3 subject to the limitation that (a+b+c)<3; the subscripts d and e are zero or positive and have a value ranging from 0 to 3 subject to the limitation that (d+e)=3, wherein when hair is treated with said personal care composition said hair has a hydrophobic response to water.

A cationically curable composition for dental use containing a cationic polymerization initiator (I) and cationically polymerizable monomers (II), the cationically polymerizable monomers (II) containing an oxetane compound and an epoxy compound or an alkenyl ether compound at a ratio of amounts that satisfy the conditions expressed by the following formula,

(a×A):(b×B)=91:9 to 45:55

wherein A is a mol number of the oxetane compound, “a” is an average number of the oxetane functional group contained in one molecule of the oxetane compound, B is a mol number of the epoxy compound or the alkenyl ether compound, and “b” is an average number of the epoxy functional group contained in one molecule of the epoxy compound or an average number of the alkenyl ether functional group contained in one molecule of the alkenyl ether compound. The composition is not hindered by oxygen from being polymerized, cures quickly even without using a special polymerizable monomer or a particular polymerization initiator, little forms an unpolymerized layer on the surface even when polymerized and cured in a highly humid environment such as in the oral cavity, and is suited as a filling/restorative material for dental use.

A photosensitive inkjet ink is provided, which includes a photo-acid generating agent, pigment, and an organic dispersion medium containing at least two kinds of polymerizable compounds selected from the group consisting of an oxetane compound and a vinyl ether compound, at least one kind of the polymerizable compounds being a monofunctional compound at a concentration of 20 to 70% based on a total weight of the organic dispersion medium, and the vinyl ether compound at a concentration of 30% or more based on a total weight of the organic dispersion medium. The vinyl ether compound is selected from the following chemical formula.

The present invention provides a novel photocurable composition containing an organic polymer having an epoxy group and/or oxetane group-containing silicon group at an end and a cationic photoinitiator. For example, the photocurable composition contains an organic polymer (A) having an epoxy group and/or oxetane group-containing silicon group at an end, and a cationic photoinitiator (B), the organic polymer (A) being produced by addition reaction between an organic polymer terminated with an unsaturated group and a hydrosilane compound having an epoxy group and/or an oxetane group.

The present invention relates to a novel fluorine-containing cyclic compound that is derived from a norbornadiene and hexafluoroacetone and has an oxacyclopentane or oxacyclobutane structure. This compound may be represented by the following formula (1) or (2). Furthermore, the present invention relates to a fluorine-containing high-molecular compound prepared by a polymerization or copolymerization using this fluorine-containing cyclic compound or its derivative. By using such fluorine-containing high-molecular compound, it is possible to provide a superior resist material and a fine pattern forming process using the same.

The present invention provides a novel compound which is suitable as the starting material of a side-chain type liquid crystalline polymeric substance having a reactive group which is excellent in reactivity upon fixation of the liquid crystal orientation structure. The novel compound is a (meth)acrylic compound having an oxetanyl group represented by the formula

wherein R¹ is hydrogen or methyl, R² is hydrogen, methyl, or ethyl, “-L₁-M-L₂-” represents a mesogen portion, and n and m are each an integer of 0 to 10. The present invention also provides a liquid crystal film containing the side-chain type liquid crystalline polymeric substance and a liquid crystal display mounted with such a liquid crystal film.