123 results about "Cyclo olefin polymer" patented technology

The invention discloses a composite optical film with a polarization function, a preparation method and application thereof. The composite optical film comprises a transparent substrate layer, and a buffer layer, an oriented calcite crystal layer and an anti-reflection layer which are laminated on one side of the transparent substrate layer. Wherein the oriented calcite crystal layer is obtained by coating a superparamagnetic modified calcite crystal composite material suspension on the surface of the buffer layer, inducing optical axis oriented arrangement through a magnetic field and performing UV curing; the buffer layer is obtained by co-extruding a cycloolefin polymer and a polyurethane acrylate mixture, and a thermal expansion coefficient transition system is formed; the anti-reflection layer is composed of nano-porous titanium dioxide with the refractive index changing from 1.8 to 2.3 in a gradient mode, and a refractive index gradient structure is formed. According to the composite optical film, the polarization efficiency and the light transmittance of the composite optical film are improved and the industrial stability is improved through the design of the polarization functional layer in which the calcite nanocrystals are directionally arranged under the induction of a magnetic field and in combination with the gradient refractive index scattering layer.

The invention provides a preparation method of a hydrogenated cycloolefin polymer, which comprises the following steps: reacting a cycloolefin polymer with hydrogen in the presence of a hydrogenation catalyst and a hydrogenation aid to obtain the hydrogenated cycloolefin polymer, the hydrogenation auxiliary agent is selected from one or more of aliphatic dibasic acid esters, phthalate esters and benzene polyacid esters. Compared with the prior art, in the presence of the hydrogenation catalyst and the hydrogenation auxiliary agent, the cycloolefin polymer and the hydrogen are subjected to hydrogenation reaction, and an induced dipole is induced in the adjacent cycloolefin polymer through the hydrogenation auxiliary agent molecule with an inherent dipole; the molecular attraction between the induced dipole and the inherent dipole destroys the entanglement of the original molecular chain, and the friction force between the cycloolefin polymer molecules is reduced, so that the viscosity between the polymers is reduced, and the mass transfer effect of the reaction is improved; meanwhile, intramolecular electron conjugation can be inhibited, double bonds in molecules in the hydrogenation process can be damaged more easily, the hydrogenation efficiency is improved, and then the production efficiency is improved.

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 relates to the field of medicine packaging, in particular to cycloolefin polymer hydride, a resin composition, a resin forming body and a medicine packaging material. The cycloolefin polymer hydride provided by the invention has high moisture resistance and grease resistance under a specific content ratio of a repeating unit with a monocyclic structure and a repeating unit containing a bridged ring structure, and has good flowability in the process of further melting and forming the polymer hydride into a resin forming body. And moreover, the metal residual quantity is low, the glass transition temperature is relatively high, and the method is very suitable for being applied to preparation of medicine packaging materials. In the test of the invention, the glass transition temperature of the cycloolefin polymer hydride provided by the invention is up to 139 DEG C, the melt index is up to 4.4 g / 10 min, the moisture resistance is up to 1.6 (g / m < 2 > 24 h) / 100 [mu] m, and the oil resistance is grade A.

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 present invention relates to the technical field of polypropylene roughening film, specifically a polypropylene capacitor film and a preparation method thereof, including the following process: melt extrusion of polypropylene particles, chilling casting, forming a sheet; then synchronous stretching, obtaining a polypropylene capacitor film; or hot pressing and melting of polypropylene particles, isothermal crystallization, cooling, forming a sheet; then biaxial stretching, obtaining a polypropylene capacitor film; the polypropylene particles include: by mass, 78 to 82 parts of polypropylene and 18 to 22 parts of cycloolefin polymer; cycloolefin polymer includes the following preparation components: 5-norbornene-2,3-dianhydride, amino-containing brominated benzocycloolefin and chlorosilane. The present invention enhances the heat resistance and mechanical properties of polypropylene through the compounding of polypropylene and cycloolefin polymer, improves the dielectric properties of polypropylene capacitor film, reduces its dependence on temperature, and enables it to maintain dielectric medium loss in high frequency regions.

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 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.

Provided are a cycloolefin polymer simultaneously having a high refractive index, a low Abbe number, and low birefringence and also a method of producing this cycloolefin polymer and an optical element in which this cycloolefin polymer is used. The cycloolefin polymer is a polymer, or hydrogenated product thereof, said polymer comprising a structural unit derived from a naphthyl group-containing alicyclic compound (A) represented by following formula (1), in a specific proportion. In formula (1), one of R2a to R5a is a naphthyl group and remaining groups among R2a to R5a and R1a are as defined in the specification.

A process for producing a film (A) has the following steps: - Producing a film (A) comprising at least one layer with 70 wt.% of one or more polypropylenes and between 10 wt.% and 30 wt.% of one or more cycloolefin polymers, and - Longitudinal stretching of the film (A) by means of a longitudinal stretching machine (16) with at least one pair of stretching rollers (40), wherein a main stretching gap (S1) is formed between the stretching rollers (40) of the at least one pair of stretching rollers (40), wherein the main stretching gap (S1) has a size of at least 30 mm. Furthermore, a system (10) for the production of a film (A) is shown.

The application discloses a high-opening transparent polyethylene film, which is prepared from the following raw materials: 100 parts by mass of linear low-density polyethylene, 0.025-0.055 parts by mass of a compounded opening agent, 0.05-0.20 parts by mass of a slip agent and 0.05-0.20 parts by mass of an antioxidant; the compounded opening agent is compounded from silane-modified silicon dioxide, hydrated magnesium silicate and a cyclic olefin polymer, the mass ratio of the silicon dioxide, the hydrated magnesium silicate and the cyclic olefin polymer is 1:1:2-3:3:1, the slip agent is erucic acid amide, and the melt mass flow rate of the cyclic olefin polymer at 230 DEG C and under a load of 2.16KG is 3-10 g / 10min. By compounding the three opening agents, the amount of the silicon dioxide used is greatly reduced compared with the prior art.

Layered polymer materials include a first layer including a first cyclic olefin polymer or a first cyclic olefin copolymer, a third layer including a second cyclic olefin polymer or a second cyclic olefin copolymer, and a second layer including an amphiphilic polymer having a hydrophilic component with a Hansen Solubility Parameter distance of 8 MPa1 / 2 or greater from oxygen gas, while at the same time having a hydrophobic component with a Hansen Solubility Parameter distance of 8 MPa1 / 2 or less from COC or COP. The second layer can be in contact with and be between the first layer and the third layer. The layered polymer material can be used to construct the body of a vial or a syringe. Methods of making the layered polymer material and kits containing the layered polymer material or containers having a body constructed from the layered polymer material are also described.

The invention provides a hydrogenation method of a cycloolefin polymer and a hydrogenated cycloolefin polymer, the hydrogenation method comprises the following steps: mixing a cycloolefin polymer to be hydrogenated with a solvent to obtain an intermediate solution; the method comprises the following steps: putting a hydrogenation catalyst into a fixed bed reactor, continuously introducing hydrogen, and heating until the temperature in the fixed bed reactor is not lower than 100 DEG C; and adding the intermediate liquid into the fixed bed reactor, carrying out contact reaction on the intermediate liquid, the hydrogenation catalyst and hydrogen, and carrying out solid-liquid separation, devolatilization and granulation to obtain the hydrogenated cycloolefin polymer. According to the hydrogenation method disclosed by the invention, unsaturated bonds in the cycloolefin polymer can be highly hydrogenated, continuous hydrogenation of the cycloolefin polymer is realized, and compared with a traditional intermittent kettle process, the reaction rate and the production efficiency are improved, the production cost is reduced, and the product quality is also improved.

The present invention relates to a functional cyclic olefin polymer obtained from hydrogenation of a cyclic olefin polymer, wherein the cyclic olefin polymer comprises at least a monomeric unit A′ derived from a monomer A having a norbornene ring and a polar functional group, wherein the amount of the monomeric unit A′ is in the range of from 20% to 100% by mole, 50% to 100% by mole, from 60% to 100% by mole, or from 70% to 100% by mole, based on the total amount of the monomeric units of the cyclic olefin polymer. The present invention further relates to a process for producing the functional cyclic olefin polymer, a composition comprising the functional cyclic olefin polymer, and the use of the functional cyclic olefin polymer. The functional cyclic olefin polymer of the present invention exhibits improved properties, especially in terms of mechanical properties and barrier properties.

The invention provides a transition metal catalyst and a preparation method thereof, an olefin polymerization catalyst composition and application, and belongs to the technical field of polyolefin catalysts. The transition metal catalyst is an imine-amide type transition metal compound, the structural formula of the transition metal compound is shown in the specification, and R1-R9 are respectively and independently hydrogen, alkyl groups or aryl groups; and M is an IVB-IIB group transition metal atom. The transition metal compound provided by the invention can form a double-chain structure with activity, the catalyst composition is used for copolymerization of ethylene and norbornene, the problems of poor thermal stability, insufficient selectivity, wide molecular weight distribution of polymers and the like can be solved, and cycloolefin polymers with narrow molecular weight distribution and excellent mechanical properties are prepared.

The present invention relates to a composition comprising 70 wt.-% to 95 wt.-% of a high isotactic propylene homopolymer, more than 2.5 wt.-% and less than 30 wt.-% of a cyclic olefin polymer composition and 0.1 wt.-% to 2.5 wt.-% of a random propylene copolymer solubilizer. The present invention also relates to a film comprising the polypropylene composition. Furthermore, a biaxially oriented film and a capacitor comprising the polypropylene composition are provided.

The invention discloses a controllable transmittance conductive circuit board and a preparation method thereof, and belongs to the technical field of circuit boards, the controllable transmittance conductive circuit board comprises a base material, the base material is made of one of polyamide, transparent polyimide, polyethylene glycol terephthalate and cycloolefin polymer, and the thickness of the base material is 25-500 [mu] m; the invention discloses a copper-clad plate, which comprises a base material, an alloy plating layer, which is arranged on the base material and is made of copper alloy, and the thickness of the alloy plating layer is 1-50 [mu] m. According to the invention, polyamide, transparent polyimide, polyethylene glycol terephthalate or cycloolefin polymer is used as a substrate material of the circuit board, so that the substrate has high light transmittance while having good physical properties and stability.

The present invention provides a cycloolefin polymer and a preparation method thereof, relating to the field of cycloolefin polymers. The preparation method includes: preheating the solution of the cycloolefin polymer monomer, the solution of the chain transfer agent, and the solution of the ruthenium-based catalyst to 45-200 °C respectively and then mixing them to obtain a mixed solution, subjecting the mixed solution to ring-opening polymerization reaction at 45-250 °C, wherein the time of the ring-opening polymerization reaction is 55-65 min; after the ring-opening polymerization reaction ends, introducing a hydrogen source into the mixed solution for hydrogenation reaction, wherein the time of the hydrogenation reaction is 6-12 h; after the hydrogenation reaction ends, adding a terminator, an adsorbent, and a poor solvent to the mixed solution in sequence, and separating to obtain the cycloolefin polymer. The present invention can obtain a cycloolefin polymer with controllable molecular weight, narrow molecular weight distribution, and good optical properties.

The invention discloses a cycloolefin polymer as well as a preparation method and application thereof. The cycloolefin polymer comprises a monomer component derived from a formula a and a formula b and a polymerized structural unit derived to a norbornene compound c. The hydride of the cycloolefin polymer is obtained by carrying out hydrogenation reaction on the cycloolefin polymer and hydrogen under the action of a hydrogenation catalyst. The cycloolefin copolymer and the hydride thereof provided by the invention simultaneously have high glass transition temperature, elongation at break and Young modulus, and can effectively relieve polymer chain orientation and stress concentration caused by the influence of a mold runner structure, injection pressure and the like, thereby reducing stress cracking of a finished product.

The problem to be solved by the present invention is to provide a battery module comprising: a battery cell laminate in which a plurality of battery cells are laminated; a pair of plate-like members provided at both ends of the battery cell laminate in the lamination direction; and a buffer material disposed between the plurality of battery cells and / or between the battery cell laminate and the plate-shaped member. Furthermore, the buffer material is provided with a wave-shaped plate spring in which concave parts and convex parts are alternately and continuously arranged and which extends in a predetermined direction. The corrugated leaf spring has a laminated structure in which layers containing glass fibers and layers containing epoxy resin are alternately laminated in the thickness direction, or a laminated structure in which layers containing glass fibers and / or epoxy resin are laminated in the thickness direction. A layer containing a styrene block copolymer or a cycloolefin polymer is present between the laminated layers.

The present invention provides a method for producing a thin film containing a cycloolefin polymer component by a continuous stretching method and an apparatus for the same purpose. [Solution] The method for producing a thin film (A) includes the steps of: producing a thin film (A) comprising at least one layer containing at least 70% by weight of one or more types of semicrystalline alphaolefin polymers and 10% to 30% by weight of one or more types of cycloolefin polymers; and stretching the thin film (A) in the longitudinal direction using a longitudinal stretching apparatus having at least one pair of stretching rollers (40) that form a main stretching gap (S1) of at least 30 mm in width between at least one pair of stretching rollers (40).

The invention relates to a vessel closure with a sealing element. The sealing element comprises a polymer composition. The polymer composition comprises at least 1 wt.-% of a cyclic olefin polymer. The oxygen transmission rate—OTR—of the polymer composition, determined according to DIN 53380, is at most 3000 cm3 m−2 d−1 bar−1.

This invention provides a method for preparing cyclic polyolefins, belonging to the technical field of preparing cyclic olefin polymers. The method includes: initiating ring-opening metathesis polymerization of cyclic olefin monomers using a catalyst; adding a polar monomer to obtain a mixture of linear block polymers and cyclic polymers; adding a quencher to quench the reaction; and separating to obtain the cyclic polyolefin; wherein the cyclic olefin monomer is selected as C. 5~20 The invention relates to an olefin containing carbon-carbon double bonds; the linear block polymer has polar blocks. By adding a polar monomer with a special structure after the ring-opening metathesis polymerization of a cyclic olefin, the two products can be easily separated in post-processing, yielding the target cyclic polyolefin.

The invention belongs to the technical field of functional membranes, and discloses a high-barrier membrane as well as a preparation method and application thereof. The high-barrier membrane comprises a first outer layer, a middle layer and a second outer layer which are sequentially arranged, wherein the first outer layer and the second outer layer comprise polypropylene, an initiator, an antioxidant, an ultraviolet light absorber and a light stabilizer; the intermediate layer contains a cycloolefin polymer, maleic anhydride, an antioxidant, an ultraviolet light absorber, and a light stabilizer. According to the diaphragm, an interlayer physical anchoring structure is formed through a co-extrusion process in combination with cooling calendering roller control, and the technical problems that in the prior art, interlayer combination is weak, and barrier property and mechanical property are contradictory are solved. The water vapor permeability of the high-barrier membrane is smaller than or equal to 0.1 g / (m.24h), the oxygen permeability is smaller than or equal to 0.1 cm / (m.24h. Atm), the tensile strength is larger than or equal to 30 MPa, the yellowing index delta b is smaller than or equal to 0.4, solvent resistance is excellent, and the high-barrier membrane is suitable for the field of medicine and food packaging.

The present invention discloses a composite optical film with polarization function, a preparation method, and its application. The composite optical film comprises a transparent substrate layer, and a buffer layer, an oriented calcite crystal layer, and an anti-reflection layer stacked on one side of the transparent substrate layer. The oriented calcite crystal layer is obtained by coating a suspension of a superparamagnetic modified calcite crystal composite material on the surface of the buffer layer, inducing optical axis alignment through a magnetic field, and then UV curing. The buffer layer is obtained by co-extruding a mixture of a cycloolefin polymer and a polyurethane acrylate to form a transitional thermal expansion coefficient system. The anti-reflection layer is composed of nanoporous titanium dioxide with a refractive index gradient varying from 1.8 to 2.3, forming a refractive index gradient structure. The composite optical film is designed with a polarization function layer in which magnetic field-induced calcite nanocrystals are aligned, and combined with a gradient refractive index scattering layer, to improve the polarization efficiency and light transmittance of the composite optical film and enhance its industrial stability.

The invention provides a low-metal-residue cycloolefin polymer and a preparation method and application thereof, and the preparation method specifically comprises the following steps: (1) mixing a main catalyst, a cocatalyst and an organic solution to obtain a catalyst solution; (2) carrying out ring-opening polymerization reaction on the cycloolefin monomer solution and the catalyst solution, and after the ring-opening polymerization reaction is finished, carrying out hydrogenation reaction to obtain a cycloolefin polymer solution; and (3) adding an adsorbent, and separating to obtain the low-metal residual cycloolefin polymer. According to the adsorbent, hydrophobic groups are grafted on the surface of a molecular sieve, adsorption on polar molecules is reduced, polar metal impurities are preferentially captured, then a template in a pore channel of the molecular sieve is removed through absolute ethyl alcohol, sulfydryl and phenolic hydroxyl are grafted in the pore channel of the molecular sieve, double capture sites are provided, and a metal catalyst left in a cycloolefin polymer solution is chelated; the cycloolefin polymer which is deeply removed and purified can be applied to the field of medical packaging materials, and the safety can be improved.

The application relates to the technical field of high polymer materials, in particular to a hydrogenated cycloolefin polymer with high adhesion and high elongation and a preparation method thereof. The method comprises the following steps: performing a ROMP polymerization reaction on norbornadiene and a second cycloolefin in the presence of a solvent, a polymerization catalyst and a molecular weight regulator, obtaining a cycloolefin polymer solution after quenching; adding an oxidizing agent into the cycloolefin polymer solution to perform an opening ring oxidation reaction, and obtaining an intermediate after post-treatment; performing a hydrogenation reaction on the intermediate and hydrogen in the presence of a hydrogenation catalyst to obtain the hydrogenated cycloolefin polymer. The hydrogenated cycloolefin polymer provided by the application has higher elongation than conventional cycloolefin polymers, and has higher adhesion to glass and metal substrates.

The invention relates to the technical field of fused deposition 3D printing wire preparation, in particular to a cycloolefin polymer-based flexible printing wire material, a preparation method and a solar interface evaporator. The method comprises the following steps: catalyzing a cycloolefin monomer to generate olefin metathesis ring-opening polymerization reaction by utilizing a Grubby catalyst to form a cycloolefin polymer; under the action of a photoinitiator, a mixture formed by the cycloolefin polymer and a filling material is subjected to ultraviolet light curing, and a cycloolefin compound is obtained; and extruding the cycloolefin compound through a screw to prepare the cycloolefin polymer-based flexible printing wire material. By regulating the crosslinking density of the cycloolefin compound, on the basis of keeping flexibility, the mechanical property is improved, and the problem of contradiction between high elasticity and dimensional stability of a flexible device material is solved. The solar interface evaporator with high water evaporation efficiency is prepared by developing a cycloolefin polymer material capable of FDM printing and constructing a bionic gradient pore structure.

This invention discloses a transparent polyethylene film with stable frictional properties and its preparation method. The film is prepared from the following raw materials: 100 parts by weight of linear low-density polyethylene, 0.025-0.055 parts by weight of a compounded opening agent, 0.05-0.20 parts by weight of a slip agent, and 0.05-0.20 parts by weight of an antioxidant. The compounded opening agent is obtained by compounding silane-modified silica with a cyclic olefin polymer, and the mass ratio of silica to cyclic olefin polymer is 1:1 to 6:1. The slip agent is erucamide, and the melt flow rate of the cyclic olefin polymer at 230°C and 2.16 kg is 3 g / 10 min to 10 g / 10 min. By using two compounded opening agents, this invention significantly reduces the amount of silica used compared to the prior art using silica alone. At the same addition amount, it exhibits better opening and transparency compared to the prior art, and also has good friction coefficient stability.