98 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-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 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 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 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.

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 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 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.

The present application relates to the technical field of new high-end polyolefin, in particular to a kind of cycloolefin copolymer and its preparation method, the use in optical material.The cycloolefin copolymer has the structure shown in formula I: The present application introduces high polarizability sulfur-containing group in polymer molecular structure, so that the prepared cycloolefin copolymer realizes high refractive index of 1.62~1.66, while having abbe number of 22~25, and exhibits excellent optical performance.The light transmittance of the material is more than 90%, the moisture absorption is lower, and has glass transition temperature of 130 DEG C~175 DEG C, and shows good thermal stability.With these excellent properties, the material has wide application prospect in high refractive index optical element, optical coating and high-end optical equipment.

The invention discloses a hydrogel based on a cycloolefin copolymer and a preparation method thereof, and belongs to the technical field of high polymer materials. The method for preparing the hydrogel based on the cycloolefin copolymer comprises the following steps: (1) dispersing the cycloolefin copolymer in an acid mixed solution, and carrying out acid treatment; after acid treatment, filtering, washing and drying to obtain an acid-treated cycloolefin copolymer; (2) dispersing the cycloolefin copolymer subjected to acid treatment in a solvent, mixing with an amination reagent under a stirring condition, and heating to react; after the reaction is finished, washing and drying to obtain an amino-modified cycloolefin copolymer; (3) preparing an amino gelatin solution, adjusting the pH value, adding the amino-modified cycloolefin copolymer prepared in the step (2), and carrying out ultrasonic treatment; and adding an oxidized hyaluronic acid solution, uniformly mixing, standing and cross-linking to obtain the hydrogel based on the cycloolefin copolymer. The hydrogel disclosed by the invention has high biocompatibility and mechanical strength.

Provided is a resin composition that has a low in-plane birefringence (ΔNxy) within a certain range and can be used to form optical components with excellent transparency. [Solution] A resin composition containing a cycloolefin-based resin and particles of a composite carbonate represented by the following chemical formula (1), blended in an amount of 0.1 to 1.0 parts by mass per 100 parts by mass of the cycloolefin-based resin. Ca z Sr 1-z CO3(0.1≦z<0.5) (1)

The application provides a method for separating and purifying cycloolefin resin material, which comprises maintaining recycled plastics in a solvent at a certain temperature and time, the temperature and time satisfying the following defined relationship, so that the cycloolefin resin material in the recycled plastics is sufficiently dissolved in the solvent; n >= 0; wherein T0 and T n are a certain specific temperature and the next increased temperature respectively; t0 and t n are the residence time corresponding to the specific temperature T0 and T n , T0 is 60 DEG C, and t0 is 40 min. The scheme of the application can separate and purify COC and COP plastics in recycled plastics, the solvent used does not contain carcinogenic solvents such as toluene and benzene, has good green environmental protection, and the regenerated COC and COP products have excellent transparency without adding additional additives, have high application value, and can be used in high-end fields such as food packaging and medical packaging. In addition, the application can simultaneously satisfy the separation and purification of COC or COP material, and improve the added value of the recycled cycloolefin resin material.

The invention discloses a modified material of an antibacterial high-temperature-resistant PP (polypropylene) paper box and a preparation method of the modified material, and the modified material comprises the following components in parts by weight: 100 parts of polypropylene resin; 15 to 30 parts of multifunctional toughening compatible master batch; 3 to 8 parts of controllable degradation master batch; the multifunctional toughening compatible master batch comprises matrix resin, core-shell hybrid particles dispersed in the matrix resin and a polypropylene grafted maleic anhydride compatibilizer, the matrix resin is a copolymer of ethylene and 1-octylene, the core-shell hybrid particles take a metal organic framework material as a core and take a cycloolefin copolymer grafted and modified by maleic anhydride and 1-octylene as a shell, and the polypropylene grafted maleic anhydride compatibilizer is a polypropylene grafted maleic anhydride compatibilizer. According to the invention, by constructing hybrid particles which take a metal organic framework material as a core and a modified cycloolefin copolymer as a shell, the problem of compatibility between a polar antibacterial / nucleation functional unit and a non-polar polypropylene matrix is creatively solved.

Provided is a resin that can simultaneously achieve a high refractive index, high heat resistance, and low birefringence. A hydrogenated cycloolefin copolymer is obtained through hydrogenation of a cycloolefin copolymer that includes a structural unit derived from 1-naphthylnorbornene and a structural unit derived from 2-naphthylnorbornene, wherein an average endo isomer ratio of the 1-naphthylnorbornene and the 2-naphthylnorbornene is 50 mol % or more. The hydrogenated cycloolefin copolymer is suitable for use as a material of an optical element such as an optical lens.

The invention discloses a hydrogenated cycloolefin copolymer, a preparation method of the hydrogenated cycloolefin copolymer, a hydrogenated cycloolefin resin composition and application of the hydrogenated cycloolefin resin composition. The hydrogenated cycloolefin copolymer comprises a structural chain segment as shown in a formula I, a structural chain segment as shown in a formula II and a structural chain segment as shown in a formula III. By controlling the microstructure and composition of the hydrogenated cycloolefin copolymer, the molecular weight of the obtained hydrogenated cycloolefin resin composition is graded, and the formula (1) is 0 < = HLM1 < = 5%, the formula (2) is 0 < = HHM1 < = 10%, and the formula (3) is 1.0 < = G1 < = 1.5; the hydrogenated cycloolefin resin composition provided by the invention not only has the characteristics of high light transmittance, low birefringence and low haze, but also has excellent heat resistance, yellowing resistance, tear resistance and high water and oxygen barrier property, and is applied to the fields of medical packaging materials, high-end optical lenses, optical film materials and the like.

The invention discloses a metallocene compound as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The metallocene compound has a structure as shown in a formula I, wherein L is a closed carborane group; r1 and R2 are respectively and independently selected from one of an unsubstituted or substituted cyclopentadienyl group, an unsubstituted or substituted fluorenyl group and an unsubstituted or substituted indenyl group; m is selected from one of IVB group metal elements; x is selected from one of halogens. The metallocene compound disclosed by the invention is a carborane group bridged metallocene compound, can be applied to cycloolefin polymerization reaction as a main catalyst, shows relatively good high temperature resistance and catalytic activity, and can reduce the dosage of a cocatalyst.

The invention belongs to the technical field of high-performance polyolefin catalysis, and discloses an IVB metal complex containing imidazoline (alkyl)-2-imino, a catalyst system and a method for preparing a polymer from the IVB metal complex, the structural formula of the metal complex is shown in the specification, and in the formula, R1-R6 are the same or different substituent groups; the application comprises the following steps: preparing a catalyst system from the metal complex and the cocatalyst, and then carrying out polymerization reaction on ethylene and a large-volume olefin monomer in an inert solvent under the action of gas protection and the catalyst system, the ethylene / large-volume olefin monomer copolymer (or ethylene is subjected to a polymerization reaction in an inert solvent to obtain an ethylene homopolymer, or cycloolefin is subjected to a polymerization reaction in an inert solvent to obtain a cycloolefin homopolymer). The metal complex disclosed by the invention is excellent in temperature resistance, and shows excellent polymerization activity and relatively high insertion rate of a large-volume olefin monomer in a copolymerization reaction system.

The application provides a bimodal molecular weight distribution ethylene-cycloolefin copolymer and a preparation method thereof. The method comprises the following steps: activating a same metallocene compound by using two kinds of cocatalysts, i.e., alkyl aluminum, in a first activation reactor and a second activation reactor respectively to obtain a first metallocene catalyst and a second metallocene catalyst respectively; pre-dissolving a cycloolefin monomer and ethylene respectively to obtain a cycloolefin monomer solution and an ethylene solution respectively; inputting the cycloolefin monomer solution and the ethylene solution into a polymerization reactor respectively; inputting the first metallocene catalyst and the second metallocene catalyst into the polymerization reactor respectively; performing polymerization reaction; sending materials discharged from the polymerization reactor into a reaction termination device to terminate the reaction and obtain a crude polymerization product; and separating to obtain the bimodal molecular weight distribution ethylene-cycloolefin copolymer. The application provides a method for synthesizing a bimodal molecular weight distribution cycloolefin copolymer at low cost.

The present invention provides a production process and system for epoxy cycloalkane. The process comprises an oxidation procedure, a first refining procedure, a hydrogenation procedure, and a second refining procedure. The oxidation procedure is carried out in N reaction kettles connected in series, and a discharge port of the previous reaction kettle is connected to a feed port of the next reaction kettle. A starting material cycloolefin and a solvent are fed into a feed port of the first reaction kettle, while an oxidant hydrogen peroxide is divided into N-1 portions and respectively added to the first reaction kettle to the (N-1)th reaction kettle. A first material obtained after an oxidation reaction is discharged from a discharge port of the last reaction kettle. Unreacted cycloolefin separated out in the first refining procedure is returned to the oxidation procedure. The molar ratio of the cycloolefin to the hydrogen peroxide is (2-7):1. According to the present invention, a plurality of synergistic technical features are provided to improve the effective utilization rate of hydrogen peroxide, improve the product yield, and promote the complete reaction of hydrogen peroxide. The production process is a safe and high-yield process suitable for large-scale industrial production.