237 results about "Cycloalkene" patented technology

A process produces unsubstituted or at least monosubstituted α,ω-dicarboxylic acids and ketocarboxylic acids by electrochemical oxidation of unsubstituted or at least monosubstituted, monounsaturated or polyunsaturated cycloalkenes by electrochemical oxidation 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 relates to the technical field of novel high-end polyolefin, in particular to a high-refractive-index transparent cycloolefin copolymer and a preparation method thereof. The cycloolefin copolymer has a structure as shown in a formula I: # imgabs0 #. The cycloolefin copolymer prepared by the invention has a refractive index of 1.63-1.70 and an Abbe number of 14-23, the light transmittance of the material exceeds 90%, and low hygroscopicity is maintained at the same time. The glass transition temperature of the material is 161-185 DEG C, the 5% thermal weight loss is 415 DEG C or above, and the material shows excellent thermal stability. In addition, a commercial catalyst is adopted, the monomer conversion rate can reach 99% or above, and side reactions such as cross-linking do not exist. The excellent performance shows that the material has a wide application prospect in the optical field.

The present invention provides a polypropylene resin composition, a high-temperature resistant polymer film containing the same, and a preparation method and application thereof. By mass percentage, the polypropylene resin composition includes 79.7-98.9% of polypropylene resin, 1-20% of cycloolefin copolymer, and 0.1-0.3% of radiation crosslinking agent; the glass transition temperature of the cycloolefin copolymer is 120-160 °C; in the present invention, the film including the polypropylene resin composition has a high heat distortion temperature and a low thermal shrinkage rate, good high-temperature resistance, does not affect the dielectric properties of the film capacitor, has a small dielectric loss, can be biaxially stretched at a high draw ratio, and has a low cost.

The invention discloses a cycloolefin copolymer / carbon nanotube hybrid material modified oil-water separation sponge, relates to the field of high polymer materials, and provides a novel cycloolefin block copolymer which can be obtained by ring-opening metathesis polymerization of cycloolefin and 5-norbornene-2-carboxylic acid methyl ester under the catalysis of a third-generation Grubbs catalyst. The method is simple in process, and the length of the 5-norbornene-2-carboxylic acid methyl ester block can be accurately regulated, so that the nano shish-kebab structure and the surface performance of the nano shish-kebab structure can be regulated. The process for preparing the nano-hybrid shish-kebab from the cycloolefin block copolymer and the carbon nanotubes is simple in technology, the surface of a rough surface material such as polyurethane sponge can be uniformly covered with the nano-hybrid shish-kebab to form a thin film, super-hydrophobicity can be achieved, and meanwhile the nano-hybrid shish-kebab has oleophylic performance; and the oil-water separator has high separation efficiency and good wear resistance in the oil-water separation process.

The invention relates to a cycloolefin copolymer composite material as well as a preparation method and application thereof. The cycloolefin copolymer composite material is prepared from the following raw materials: a cycloolefin copolymer, a thermoplastic elastomer, a nucleating agent and a flow promoter, the total mass of the cycloolefin copolymer and the thermoplastic elastomer is 100%, and the content of the thermoplastic elastomer is 0.5-4%. The cycloolefin copolymer composite material disclosed by the invention has better impact resistance and drop resistance, eliminates microcracks after high-temperature moist heat sterilization, is high in material transparency and excellent in light transmittance, and can be well applied to medicine packaging and medical equipment.

The invention discloses a method for synthesizing degradable polyethylene through copolymerization of conjugated lactone and cycloolefin. The preparation method comprises the following steps: catalyzing ring-opening metathesis polymerization of alpha, beta-unsaturated lactone and a cycloolefin monomer by using a Grubbs catalyst, hydrogenating the obtained copolymer to prepare a series of polyethylene-like materials with different densities introduced into ester groups in a main chain, and simultaneously retaining the thermal and mechanical properties of high-density polyethylene; after the polyethylene material is degraded and recycled through alcoholysis, polyethylene-like with high molecular weight and excellent performance can be obtained again through a polycondensation method, and the problem that an existing polyethylene material is difficult to recycle is solved. The synthesis method is simple and convenient to operate, the polymer obtained by copolymerization of conjugated lactone and cyclooctene is high in molecular weight, and ester groups in a main chain are uniformly distributed. Regioselectivity of conjugated lactone polymerization is good, and an AB type monomer obtained after alcoholysis is beneficial to polycondensation to obtain a high-molecular-weight polymer. The hydrogenated product is pure white solid powder, has few metal catalyst residues, and is expected to replace a bulk polyethylene material.

The invention provides a cycloolefin polymer, a cycloolefin polymerization process and application. The cycloolefin polymerization process comprises a raw material preparation process, a polymerization process, a hydrogenation reaction process, a devolatilization process and a devolatilization extrusion granulation process. According to the process, cycloolefin is subjected to a polymerization reaction in a polymerization kettle to generate a polymer; the process comprises the following steps: feeding a material from a polymerization kettle into a hydrogenation reaction kettle, and carrying out hydrogenation reaction to generate a cycloolefin polymer; the process comprises the following steps: feeding a material from a hydrogenation reaction kettle into a devolatilization kettle to remove volatile matters; according to the process, the cycloolefin polymer discharged from a devolatilization kettle enters a screw extruder, the space between a feed port and an outlet of the screw extruder is at least divided into 2-3 sections, exhaust ports are formed in the at least 1-2 sections from the feed port and used for vacuumizing, volatile matter is further removed, and the cycloolefin polymer with the low volatile matter content is obtained. The cycloolefin polymer is not crosslinked, has stable structure and performance, does not turn yellow, and is easy to process.

The invention discloses a cycloolefin block copolymer oil-water separation film, relates to the field of high polymer materials, and provides a method for preparing a cycloolefin block copolymer through ring-opening metathesis polymerization of cycloolefin and 5-norbornene-2-carboxylic acid methyl ester under the catalysis of a third-generation Grubbs catalyst. And the hybrid shish-kebab is prepared by using the polymer, so that an oleophylic and hydrophobic film structure can be formed, the prepared film can be effectively hydrophobic and has oleophylic performance, and a new treatment mode is provided for sewage prevention and treatment. The whole preparation process is simple in technology, rapid and batch production can be achieved, and popularization is convenient.

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 belongs to the field of high polymer materials, and particularly relates to a cycloolefin polymer as well as a preparation method and application thereof. The preparation method provided by the invention comprises the following steps: a) in the presence of a catalyst system, carrying out prepolymerization reaction on a polymeric monomer in a solvent to obtain a prepolymer; the polymeric monomer comprises norbornene cycloolefin, and the viscosity of the prepolymer at 25 DEG C is 3-300 cps; and b) continuously mixing the prepolymer with a polymerization monomer for polymerization reaction, and then carrying out hydrogenation reaction on a polymerization reaction product to obtain the cycloolefin polymer. The cycloolefin polymer with excellent tensile strength, tensile modulus and film thickness uniformity can be obtained by adopting a two-step method for polymerization and controlling the viscosity of the prepolymer.

The invention relates to the technical field of novel high-end polyolefin, in particular to a cycloolefin copolymer and a preparation method thereof. The cycloolefin copolymer has a structure as shown in a formula I: # imgabs0 #. The refractive index of the cycloolefin copolymer can be up to 1.72, and the light transmittance exceeds 90%. By adjusting the variety and proportion of cycloolefin monomers in the copolymer, the cycloolefin copolymer with the refractive index range of 1.64-1.72 and the Abbe number of 12-20 can be obtained. The glass transition temperature of the cycloolefin copolymer ranges from 170 DEG C to 201 DEG C, and 5% thermal decomposition can occur only at the temperature of 420 DEG C or above, so that the cycloolefin copolymer has high heat resistance. In addition, the water absorption rate of the cycloolefin copolymer is less than 0.01%, and the cycloolefin copolymer shows excellent low hygroscopicity. By virtue of ultrahigh refractive index, excellent transparency, high heat resistance and low hygroscopicity, the cycloolefin copolymer shows extraordinary application potential in the high-end optical field.

The invention discloses a fast-extrusion, anti-sagging and large-diameter pipeline material and a preparation method thereof. The anti-sagging large-diameter pipeline material comprises the following components: high-density polyethylene, functionalized polyethylene, a cycloolefin polymer and carbon black master batch. Wherein the functionalized polyethylene is maleic anhydride grafted polyethylene resin grafted modified graphene. Due to the special structure of the functional master batch, on one hand, the functional master batch has very good compatibility with a high-density polyethylene matrix, uniform dispersion can be realized, so that a very good enhancement characteristic is provided, and meanwhile, functional polyethylene has an extremely high heat conductivity coefficient, and has a better sag resistance characteristic when a large-caliber thick-wall pipe (the pipe diameter is more than 1000mm and the wall thickness is more than 100mm) is produced. According to the large-diameter pipeline material disclosed by the invention, a thinner large-diameter pipe with more uniform wall thickness can be produced through the comprehensive influence of high heat dissipation efficiency of the polyethylene master batch in the formula, rapid cooling and shaping after extrusion of cycloolefin and the like.

The invention discloses a high-refraction cycloolefin polymer as well as a preparation method and application thereof, and belongs to the technical field of polymer preparation. A cycloolefin monomer is subjected to a polymerization reaction in an inert solvent in the presence of a catalyst, then a polymerization reaction product is subjected to a hydrogenation reaction, and the pure-hydrocarbon high-refractive-index cycloolefin polymer is obtained. The cycloolefin polymer has excellent refractive index, heat resistance, light transmittance and low hygroscopicity, and can be widely applied to the field of transparent optical materials such as optical lenses and polarizing films, the field of medical instruments such as pre-filling needles and pipettes, and the field of 5G / 6G low-dielectric communication materials.

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 low-density high-shrinkage film as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The low-density high-shrinkage film comprises a core layer structure and a surface layer structure arranged on the surface of the core layer structure, the raw materials of the core layer structure comprise a polypropylene homopolymer and a cycloolefin copolymer; the surface layer structure is prepared from the following raw materials: ternary copolymerized polypropylene and organic silicon; the transverse shrinkage rate of the low-density high-shrinkage film in a 90-DEG C water bath for 10 seconds is larger than or equal to 70%, the density is smaller than 1.0 g / cm < 3 >, the low-density high-shrinkage film can be separated from PET bottle bodies in the downstream physical recovery field, and compared with a PETG shrinkage film with the density being 1.28-1.32 g / cm < 3 >, the density is greatly reduced, the use amount of petroleum-based macromolecular resin is saved, and the quality stability of PET bottle chips in the subsequent recovery process is guaranteed.

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 invention discloses a phosphazene mono-metallocene catalyst, a preparation method thereof and an application thereof. The phosphazene mono-metallocene catalyst has a structural expression shown by the following formula. The phosphazene mono-metallocene catalyst proposed by the present invention has very excellent polymerization activity in catalyzing the copolymerization of cycloolefins, and at the same time has good copolymerization performance, a high cycloolefin insertion rate, and the polyolefin product has an ultra-high molecular weight, having significant application advantages. #imgabs0#

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.