168 results about "Cycloalkene" patented technology

The invention discloses a hydrogenated cycloolefin copolymer, a hydrogenated cycloolefin resin composition and a preparation method thereof. Under the condition that the monomer composition and molecular weight of the hydrogenated cycloolefin copolymer are certain, the hydrogenated cycloolefin copolymer with more excellent performance can be obtained by controlling the hydrogenation reaction conditions of the hydrogenated cycloolefin copolymer. The hydrogenated cycloolefin resin composition provided by the invention not only has the characteristics of high refractive index, low haze and aging and yellowing resistance, but also obviously improves the separation efficiency of a catalyst, has excellent processability, and has outstanding application prospects in the fields of medical packaging materials, high-end photoelectric materials and the like.

The invention relates to a low-smoke flame-retardant ethylene propylene diene monomer composite material and a preparation method thereof, and belongs to the technical field of polymer composite materials. The composite material comprises the following components: 100 parts of raw ethylene propylene diene monomer rubber, 5-8 parts of a cycloolefin copolymer, 20-25 parts of a modified aluminum hydroxide-magnesium hydroxide flame retardant, 15-20 parts of a phosphorus-nitrogen intumescent flame retardant, 2-5 parts of a melamine modified graphene-layered bimetal hydroxide composite flame retardant and 3-10 parts of a vulcanization system, the vulcanization system comprises 3-5 parts of zinc oxide, 1-2 parts of stearic acid, 1-2 parts of an accelerant, 0.5-1.5 parts of sulfur and 1-5 parts of a processing aid. According to the invention, the raw rubber of the ethylene propylene diene monomer is compounded with a small amount of cycloolefin copolymer, so that the smoke formation tendency is reduced from the matrix level, and a ternary synergistic flame-retardant system consisting of the inorganic flame retardant, the phosphorus-nitrogen intumescent flame retardant and the nano composite flame retardant is matched, so that the composite material keeps good mechanical properties at the same time.

The invention discloses a high-temperature-resistant thin-wall flame-retardant glass fiber reinforced polycarbonate / COC alloy composition as well as a preparation method and application thereof. The polycarbonate / COC alloy composition is prepared from the following components in parts by weight: 10 to 64 parts of polycarbonate; 5 to 50 parts of COC; 10 to 30 parts of glass fiber; 0.5 to 2.0 parts of a compatilizer; 5-15 parts of a phosphorus-based flame retardant; and 0.3-1 part of a flame retardant synergist. The polycarbonate / olefin cycloolefin copolymer alloy composition disclosed by the invention is excellent in flame retardant property and mechanical property, good appearance and toughness of the material can be maintained while high heat resistance and high rigidity are maintained, and the polycarbonate / olefin cycloolefin copolymer alloy composition is more in line with the development trend of electronic products.

The invention discloses a processing method of a high-precision cycloolefin copolymer free-form surface lens, the free-form surface lens comprises an upper end surface and a lower end surface, the upper end surface of the free-form surface lens comprises a free-form surface contour A surface and an outer circumferential surface a annularly arranged outside the free-form surface contour A surface; the lower end face of the free-form surface lens comprises a free-form surface contour surface B and an outer circumferential surface b annularly arranged outside the free-form surface contour surface B. The machining method comprises the steps of S1, tool rough machining, S2, lens blank rough machining, S3, inputting a digital-analog point cloud data file into ultra-precision equipment, S4, tool fine trimming, S5, lens blank plane fine trimming and S6, side wall vertical plane machining. S7, rough turning of the upper end face of the lens blank, S8, finish turning of the transition free-form surface outline A face, S9, turnover clamping, S10, rough turning of the lower end face of the lens blank and S11, finish turning of the transition free-form surface outline B face are conducted, and when ultra-precision equipment is used for machining in the steps S4, S5, S7, S8, S10 and S11, liquefied carbon dioxide is used for cooling.

The invention discloses a high-refractive-index-difference bottle brush block polymer and a synthetic method of a degradable structural color material, and belongs to the technical field of organic polymers. The end group of the high-refractive-index degradable macromonomer is a cycloolefin derivative capable of performing sequential ring-opening metathesis polymerization reaction (ROMP), and the main chain is a degradable polymer prepared by performing ring-opening copolymerization reaction on styrene oxide (SO) and a comonomer. A series of novel degradable cycloolefin macromonomers are designed and synthesized to replace polystyrene and other non-degradable high-refractive-index polymers commonly used in the field, and the macromonomers and a block copolymer brush are synthesized through ring-opening polymerization and ring-opening metathesis polymerization. And an environment-friendly structural color material capable of covering a full visible light wave band is further prepared by utilizing a phase separation mechanism.

The invention belongs to the technical field of chemical materials, and particularly relates to an anti-aging treatment process for a cycloolefin-based high polymer material. The cellulose crystal, the ethylene-butyl acrylate copolymer, the antioxidant 1010 and the antioxidant DLTP are specifically combined, so that the thermal decomposition speed of the polymer at high temperature is reduced, and the oxidation reaction of the cycloolefin polymer in the processing and using processes is inhibited; all the raw materials have a synergistic effect, the oxidation performance of the cycloolefin polymer is inhibited, and the anti-aging performance is improved. Therefore, the anti-aging agent provided by the invention can improve the anti-aging performance of the cycloolefin-based high polymer material, and can be used for preparing anti-aging products of the cycloolefin-based high polymer material.

The present invention relates to the field of quantum dot reflective film technology, disclosing a high-stability quantum dot reflective film for display and its preparation method. The film comprises a three-layer structure, A / B / A. The raw materials for layer A include a matrix resin and an antistatic agent; the raw materials for layer B include a matrix resin and fluorescent quantum dot composite microspheres. The fluorescent quantum dot composite microspheres comprise fluorescent quantum dots whose surfaces have been passivated with tert-dodecyl mercaptan and a cycloolefin polymer coating the surfaces. The method first passivates surface defects of the fluorescent quantum dot material with alkyl mercaptan, then uses a cycloolefin polymer as a secondary shell material. The composite particles are mixed with the matrix resin. The resulting quantum dot reflective film exhibits high fluorescence efficiency and wide color gamut display capabilities, while also exhibiting superhydrophobicity and anti-oxidative chemical stability.

The invention provides a bidentate imine vanadium metal complex as well as a preparation method, a catalyst composition and application thereof, and the bidentate imine vanadium metal complex has the following structural formula: the bidentate imine vanadium metal complex disclosed by the invention has higher catalytic activity on copolymerization reaction of ethylene and cycloolefin as a catalyst; the insertion rate of the comonomer in the polymer is high; the bidentate imine vanadium metal complex disclosed by the invention, as a catalyst, also has relatively high catalytic activity on a copolymerization reaction of ethylene and a hydroxyl-containing polar monomer, and a functionalized polyolefin product can be obtained.

The invention relates to the technical field of thin-film capacitors, in particular to a standardized and modularized thin-film direct-current support capacitor which can reduce design complexity and cost budget, is convenient to combine and expand, can operate in a high-temperature environment and is high in applicability, and the standardized and modularized thin-film direct-current support capacitor comprises a capacitor unit and a busbar. Each capacitor unit comprises a capacitor shell and a core arranged in the capacitor shell, clamping groove structures matched with each other are arranged on two sides of the outer wall of the capacitor shell, a positioning groove is formed in the inner wall of the capacitor shell, and a lead-out pin of the capacitor unit penetrates through the positioning groove; the film base film of the core is formed by mixing and co-extruding 70%-80% of polypropylene and 20%-30% of cycloolefin copolymer.

The present invention relates to an unsymmetrical squaraine dye of formula (I) and process for the preparation thereof. The process includes dissolving a 3-cycloalkene-1,2-dione compound in acetone and aqueous HCl to afford a semisquaraine compound. The process includes refluxing the semisquaraine compound and phenyl carboxylic acid dissolved in solvent to afford the unsymmetrical squaraine dye. Further, the present invention relates to an electronic device with an enhanced device efficiency containing a dye of formula (I) co-sensitized with a squaraine dye.

The invention provides a method for preparing an epoxy compound from cycloolefin. The invention specifically provides a preparation method of a compound as shown in a formula II, which comprises the following step: in an organic solvent, under the action of hexafluoroacetone, carrying out oxidation reaction on a cycloolefin compound as shown in a formula I and hydrogen peroxide to obtain the compound as shown in the formula II. The method provided by the invention is mild in condition and good in selectivity, and has a relatively good application prospect.

The present invention relates to a method for producing unsubstituted or at least monosubstituted α,ω-dicarboxylic acids or ketocarboxylic acids and unsubstituted or at least monosubstituted cycloalkanones by electrochemically oxidizing unsubstituted or at least monosubstituted mono- or polyunsaturated cycloalkenes and unsubstituted or at least monosubstituted saturated alicyclic hydrocarbons in an electrolytic cell in the presence of inorganic or organic nitrates in a reaction medium in the presence of oxygen.

The present invention relates to the field of fine chemical technology, particularly to the field of IPC C07C303. More specifically, it relates to a cycloaliphatic ethoxylated sodium bisphenol sulfonate and a preparation method thereof. The general structural formula is shown in Formula 1: wherein X comprises one of O, CH2, and (CH3)2C, and R comprises an unsaturated ring. The preparation method comprises the following steps: S1, an etherification reaction: adding a cycloolefin, an ethoxylated bisphenol compound, and an acidic catalyst to a reaction solvent, heating the reaction, and removing the solvent, catalyst, and excess cycloolefin to obtain an alicyclic ethoxylated bisphenol intermediate; S2, a sulfonation neutralization reaction: cooling the intermediate, adding a sulfonating reagent dropwise for reaction, and post-treating the intermediate to obtain the product. The preparation method is simple and mild, and the product has good water solubility and surface activity.

The application provides a high-refraction cycloolefin copolymer and a preparation method thereof, and has a structure of formula I. The cycloolefin copolymer can obtain a cycloolefin copolymer resin with high thermal stability due to high steric hindrance of the cycloolefin monomer. The refractive index of the cycloolefin copolymer resin is greatly improved due to R3 and R4 on the cycloolefin monomer, and is first broken through to above 1.70, while maintaining high light transmittance of 91.0-96.0%, extremely low water absorption (<0.01%), and a glass transition temperature of 219 DEG C. The application prepares the cycloolefin copolymer resin with high activity, adjustable molecular weight and glass transition temperature by adjusting the reaction conditions. The copolymer resin has high refractive index, high light transmittance, heat resistance, low birefringence and moisture absorption, excellent fluidity, moldability and dimensional stability.

The present application relates to high refractive index material preparation technical field, particularly to a kind of high refractive index, colorless transparent titanium dioxide / cycloolefin copolymer composite preparation method.The preparation method includes the following steps: under the condition of anhydrous oxygen-free, monomer HBM is dissolved with the functional reaction site-containing norbornene derivative in solvent, catalyst is added to carry out reaction, and termination reaction is obtained cycloolefin copolymer;Cycloolefin copolymer is dissolved in solvent, and hydrolysis condensation reaction is carried out by adding tetrabutyl titanate, and titanium dioxide / cycloolefin copolymer composite material is obtained;The structural formula of monomer HBM is as shown below:;The structural formula of functional reaction site-containing norbornene derivative is at least one of the following structural formula M1~M4:。The refractive index of the titanium dioxide / cycloolefin copolymer composite material is between 1.578~1.701, excellent light transmittance is shown at 589 nm and has high glass transition temperature.

The application discloses an antioxidant cycloolefin copolymer and a preparation method thereof. The cycloolefin copolymer has the structure shown in the figure, wherein the ethylene unit of the x structure accounts for 50-90% of the total moles of all structural units, the cycloolefin unit of the y structure accounts for 10-45% of the total moles of all structural units, and the cycloolefin monomer containing an antioxidant functional group of the z structure accounts for 0.1-20% of the total moles of all structural units. Compared with a traditional ethylene and cycloolefin binary copolymer, the cycloolefin monomer containing an antioxidant functional group of the application makes the copolymer have thermal oxygen and photo oxygen stability; compared with directly adding an antioxidant in a finished product, the method is simple and easy to implement, and the shortcomings of poor compatibility and poor migration resistance of the antioxidant are avoided.

The invention discloses a multifunctional vinyl aromatic compound which is prepared by compounding the following components in parts by weight: 20-30 parts of a monomer A, 5-20 parts of a monomer B, 5-20 parts of a monomer C, 0.1-1 part of a first initiator and 80-120 parts of a first solvent.The multifunctional vinyl aromatic compound prepared by the invention has a non-polar cycloalkene skeleton and a symmetric aromatic ring structure; non-polar cycloalkene and a symmetrical methyl structure are introduced, dipole polarization loss is effectively reduced, and controllable free radical polymerization reaction is adopted for preparation, so that the proportion of monomers can be adjusted, the molecular weight and narrow molecular weight distribution are controlled, a three-dimensional network is constructed, molecular chain segment relaxation is effectively inhibited, and the molecular weight distribution is reduced. A low dielectric constant and ultralow dielectric loss are maintained; and a siloxane chain segment is embedded into the copolymer, so that the interface is optimized, and the adhesion between the resin and the copper foil is improved.

Provided is a resin sheet for a semiconductor manufacturing process, comprising a cycloolefin resin having a glass transition temperature of 115°C or higher.

The present invention provides an adhesive film for a cycloolefin film, which has high adhesive force on both surfaces and does not decrease in adhesive force to a cycloolefin film even when a release film having a low residual adhesion rate is used. In this adhesive film (10) for cycloolefin films, release films (12, 13) are bonded to both surfaces of an adhesive layer (11) obtained by cross-linking an adhesive composition containing a (meth) acrylic polymer and a cross-linking agent, the residual adhesion rate of a peeling-treated surface (12a) of one release film (12) is 70-90%, and the residual adhesion rate of a peeling-treated surface (13a) of the other release film (13) is 90-110%. The adhesive force of the surface (11a) of the adhesive layer (11) to which one release film (12) is attached to the cycloolefin film is 10 N / 25 mm or more, and the adhesive force of the surface (11b) of the adhesive layer (11) to which the other release film (13) is attached to the cycloolefin film is 90% or more.

The invention provides a high-light-transmittance LED diffusion plate and a preparation process thereof, and belongs to the technical field of light diffusion materials.The preparation process comprises the following steps that cerium nitrate hexahydrate, absolute ethyl alcohol and triethanolamine are mixed and stirred, centrifugation is conducted to remove supernatant, water, methyl methacrylate, potassium persulfate, vinyl trimethoxy silane and 3-mercaptopropyltrimethoxysilane are added, heating and stirring are conducted, and the high-light-transmittance LED diffusion plate is obtained; filtering and drying in vacuum to obtain light diffusion particles; the preparation method comprises the following steps: immersing nanocellulose in a zinc chloride aqueous solution, soaking in absolute ethyl alcohol, washing, and drying to obtain pretreated nanocellulose; adding the pretreated nanocellulose into the cycloolefin copolymer solution, and performing ultrasonic treatment to obtain a mixed solution; polycarbonate and light diffusion particles are subjected to melt blending, extrusion, strip drawing, cooling forming, cutting, mixed solution dropwise adding, spin coating and drying, and the high-light-transmittance LED diffusion plate is obtained. The light diffusion effect and the high light transmittance can be achieved, and meanwhile certain haze is achieved.

A process for the preparation of a cycloolefin copolymer is provided, enabling the efficient production of a cycloolefin copolymer consisting of a cycloolefin monomer and an α-olefin with a carbon number of 3 to 20, exhibiting excellent toughness. It is produced in a process comprising a first polymerization, in which a cycloolefin monomer and an α-olefin are polymerized in a polymerization vessel in the presence of a titanocene catalyst, an alkylaluminum compound, and a borate compound; the second polymerization involves adding the monomer and the alkylaluminum compound to the polymerization vessel; and the second polymerization, in which the polymerization of the monomer is continued after the addition of the monomer and the alkylaluminum compound.

The invention relates to the technical field of composite materials, and belongs to a multi-layer impact-resistant plastic plate and a preparation method thereof.The plate adopts three master batches as raw materials, specifically, the first master batch takes block polypropylene as the main component, and a plate layer A is prepared; the second type of master batch takes linear low-density polyethylene and low-density polyethylene as main components to prepare a plate B layer; and preparing a plate C layer by taking a cycloolefin copolymer or a special cycloolefin copolymer as a main component of the third master batch. The impact-resistant plastic plate with a multi-layer structure is obtained by accurately controlling the compounding proportion and characteristics of different layers of materials and carrying out in-situ hot-pressing compounding by utilizing a screw extruder. The plate not only has excellent impact resistance and bending property, but also has good surface strength and gloss. By reasonably designing the combination and compounding process of all layers of materials, the board has high attractiveness while meeting the high-strength protection requirement.

The invention relates to the technical field of preparation of cycloolefin copolymer monomers, and discloses a method for preparing norbornene with low energy consumption and a short process and application thereof. The method provided by the invention is suitable for synthesizing the norbornene synthetic liquid by a solvent method and purifying the norbornene synthetic liquid, and the norbornene solution which can be directly used in polymerization is obtained through two-step purification. The method can obtain the norbornene solution suitable for COC synthesis at a high yield, and has the advantages of short process flow, high resource utilization rate, reliable process, easiness in management, easiness in industrial popularization and the like.

The application discloses a method for constructing a cycloalkene-quinolinone axial chiral compound through a Heck reaction. The method uses a quinolinone compound containing central chirality as a substrate, uses palladium acetate (Pd(OAc)2) and 4,5-bisdiphenylphosphine-9,9-dimethylxanthene (Xantphos) as a catalyst, uses silver phosphate (Ag3PO4) as an alkali, and uses toluene as a solvent to prepare a cycloalkene-quinolinone axial chiral compound. The compound can be reacted with diisobutylaluminum hydride to realize conversion of a functional group. The method has mild reaction conditions, raw materials are easy to obtain, the product has excellent enantioselectivity, and has excellent yield, and thus provides a new method for synthesizing a cycloalkene-quinolinone axial chiral compound.

The invention discloses a half adder based on a vanadium dioxide and gallium arsenide metasurface, and belongs to the technical field of terahertz communication modulation. The multi-layer structure is composed of a gold substrate, a cycloolefin copolymer dielectric layer and a gold-gallium arsenide-vanadium dioxide top layer pattern. Based on the principle of a metamaterial absorber, the metasurface designed by the invention has the function of a half adder, and a new thought is provided for the design of a terahertz multifunctional logic device in the future.

A cycloolefin ring-opened copolymer includes a structural unit derived from a norbornene compound that includes a heteroelement-containing hydrocarbon group and a structural unit derived from a norbornene compound that includes a heteroelement-free hydrocarbon group. In this copolymer, the structural unit derived from the norbornene compound that includes the heteroelement-containing hydrocarbon group has a proportional content of not less than 0.01 mol % and not more than 15.00 mol % when all structural units included in the copolymer are taken to be 100 mol %.

To improve chemical stability of a material containing a metal organic structure.SOLUTION: A composite material includes a metal organic structure, and a silicon-containing polymer. The metal organic structure includes a zeolite-like imidazolate structure. The silicon-containing polymer includes a principal chain having at least one selected from a group comprising a styrene unit, a butadiene unit, an ethylene unit, a cycloolefin unit, and a fluorine-containing olefin unit. The silicon-containing polymer has a functional group shown as -SiR3-n(OX)n, for example. n represents an integer from 1-3, and X represents a binding site with a hydrogen atom, a 1-10C hydrocarbon group, and the metal organic structure, or a binding site with a silicon atom other than the silicon atom in the functional group. At least one X is the binding site with the metal organic structure. R represents a 1-10C hydrocarbon group.SELECTED DRAWING: Figure 1

The invention provides a silane coupling agent containing a cycloolefin structure and a preparation method and application thereof, the silane coupling agent containing the cycloolefin structure has a structure as shown in a formula I. One end of the silane coupling agent containing the cycloolefin structure is alkoxy silicon which can be hydrolyzed into silicon hydroxyl; and a cycloolefin group containing at least one double bond is arranged at the other end, and cycloolefin can be subjected to ROMP reaction with the ring double bond in the DCPD molecule to form a new C-C bond so as to realize chemical crosslinking. In addition, the silane coupling agent containing the cycloolefin structure and the DCPD resin have groups with similar structures, and can be better dissolved in a resin system. The glass fiber composite material obtained by utilizing the silane coupling agent containing the cycloolefin structure has a better compounding effect.

A process produces unsubstituted or at least monosubstituted α,ω-dicarboxylic acids or ketocarboxylic acids and unsubstituted or at least monosubstituted cycloalkanones by electrochemical oxidation of unsubstituted or at least monosubstituted, monounsaturated or poly unsaturated cycloalkenes and unsubstituted or at least monosubstituted, saturated cycloaliphatic hydrocarbons in the presence of an inorganic or organic nitrate salt in an electrolysis cell in a reaction medium in the presence of oxygen.

The invention discloses a composition and a preparation method thereof, a photoelectric device and a display device, and relates to the technical field of display. The composition comprises a P-type semiconductor material and a supramolecular compound, the supramolecular compound comprises a host molecule and a guest molecule, the host molecule comprises one or more of cycloxene and cycloxene derivatives, and the guest molecule comprises one or more of fullerene and fullerene derivatives. The composition provided by the invention has relatively high hole migration performance.