256 results about "Cyclic Olefins" patented technology

The invention discloses a batch processing technology of micro-fluidic chips, and relates to the technical field of chip processing. The method comprises the following steps: firstly, providing at least two layers of polymer coiled materials, namely a first coiled material for forming a micro-channel structure and a second coiled material for closing a micro-channel, the coiled materials are continuous coiled materials selected from polyethylene glycol terephthalate (PET), cycloolefin polymer (COP), polycarbonate (PC) or polymethyl methacrylate (PMMA), and the coiled materials are continuous coiled materials selected from polyethylene glycol terephthalate (PET), cycloolefin polymer (COP), polycarbonate (PC) or polymethyl methacrylate (PMMA); the thickness of the coiled material is 50-500 microns; secondly, carrying out continuous compression molding processing on the surface of the first coiled material through a roll-to-roll processing platform; through a roll-to-roll continuous process, micro-channel mold pressing, functional deposition, precise alignment bonding and online cutting are integrated, high-efficiency, high-consistency and high-integration-level batch manufacturing of the micro-fluidic chip is realized, and manual intervention and production cost are remarkably reduced.

The invention discloses a composite material polypropylene film and a preparation method thereof, and belongs to the technical field of polymer modification and polymer films. The preparation method of the composite material polypropylene film comprises the following steps: blending 5-10 wt% of maleic anhydride grafted polypropylene (PP-g-MAH), 5-20 wt% of a cycloolefin copolymer or a cyclic block copolymer and 75-90 wt% of isotactic polypropylene, granulating, carrying out melt extrusion at 240-260 DEG C, and carrying out tape casting at 80-95 DEG C to form a sheet; preheating the sheet at the temperature of 145-170 DEG C, synchronously stretching at the temperature of 150-175 DEG C, carrying out heat setting at the temperature of 160-175 DEG C, and cooling; the composite material polypropylene film is prepared through the steps of extrusion, traction, corona treatment, rolling and the like. The composite material polypropylene film not only has good heat resistance and good dielectric strength at a high temperature, but also has a relatively high dielectric constant and relatively low dielectric loss, and is suitable for a film capacitor.

The invention relates to the technical field of photovoltaic packaging materials, and discloses a modified POE photovoltaic packaging adhesive film, a preparation method thereof and a photovoltaic module. The modified POE photovoltaic packaging adhesive film is prepared from 60 to 100 parts of POE resin, 8 to 50 parts of barrier master batch, 0.5 to 2 parts of composite silane coupling agent, 0.5 to 1.5 parts of cross-linking agent and 0.2 to 2 parts of assistant cross-linking agent, the barrier master batch comprises 5-30 parts of polar functionalized grafted POE and 3-20 parts of a barrier agent; the blocking agent is a cycloolefin copolymer COC with Tg less than or equal to 120 DEG C. The modified POE photovoltaic packaging adhesive film has the advantages of high light transmittance, PID resistance and the like of the existing POE adhesive film, and also has high bonding strength and low water vapor transmittance to photovoltaic glass; the problems of adhesion, water resistance and light transmittance of the POE adhesive film are solved synergistically, the inherent processing compatibility problem between COC and a POE substrate is solved, and a foundation is laid for improving the long-term reliability of a photovoltaic module.

A system for forming a blister package includes a thermoformable film and a lidding film. The thermoformable film has a thermoformable film exterior layer and a thermoformable film interior layer. The thermoformable film exterior layer includes at least 50% by weight polypropylene. The thermoformable film interior layer includes at least 50% by weight polypropylene and (a) a tackifier and / or (b) a cyclic olefin copolymer. The lidding film includes a lidding film exterior layer, a seal layer, and a lidding film interior layer between the lidding film exterior layer and the seal layer. The lidding film exterior layer includes at least 50% polypropylene. The lidding film interior layer includes at least 50% polypropylene and a tackifier. The seal layer includes a polyolefin plastomer.

The invention discloses a preparation method of a high-performance electric-breakdown-resistant capacitor base film, which comprises the following steps: S1, preparing modified polypropylene master batch: mixing polypropylene, a cycloolefin copolymer, a barium titanate-carbon nanotube modified composite filler and an antioxidant, and carrying out melt blending, extrusion and granulation to obtain the modified polypropylene master batch; s2, carrying out melt extrusion on the modified polypropylene master batch, cooling and casting; s3, carrying out two-way stretching and heat setting on the obtained casting piece to obtain a polypropylene film; and S4, performing plasma treatment on the surface of the polypropylene film to obtain the high-performance electric-breakdown-resistant capacitor base film. The high-performance electric-breakdown-resistant capacitor base film prepared by the method has excellent electric breakdown resistance, mechanical strength, flame retardance and heat resistance, has a long-acting flame retardant effect, is excellent in comprehensive performance and has a wide market application prospect.

The application belongs to the technical field of organic compound synthesis and the field of polymer preparation, and discloses a method for directly preparing a cycloolefin copolymer from dicyclopentadiene and ethylene based on a continuous flow reactor; the continuous flow reactor is used to efficiently prepare norbornene and derivatives thereof from ethylene and dicyclopentadiene, and then the norbornene and derivatives thereof are used to prepare a cycloolefin copolymer from excessive ethylene. The application uses dicyclopentadiene and ethylene as raw materials, realizes a continuous process from the synthesis of a cycloolefin monomer to the preparation of a cycloolefin copolymer, and the cycloolefin monomer does not need to be separated and stored and can directly participate in the polymerization reaction, so that the original complicated process is effectively simplified, energy consumption is reduced, the catalyst in the polymerization stage is not easy to be deactivated even at high temperature, the catalytic efficiency is high, and a high polymer yield can be obtained in a very short time.

The invention discloses a high-temperature-resistant capacitor base film and a preparation method thereof. The base film is prepared from the following raw materials in parts by weight: 100 parts of polypropylene, 15-23 parts of cycloolefin copolymer, 5-14 parts of filler A and 4-9 parts of filler B. The cycloolefin copolymer is added into the polypropylene, so that the high temperature resistance and mechanical property of the polypropylene can be remarkably improved, and the filler A and the filler B are compounded and added, so that the mechanical strength, dielectric constant and anti-breakdown strength of the polypropylene can be comprehensively improved, and the heat resistance of the polypropylene is further improved; moreover, inorganic fillers contained in the filler A and the filler B can be uniformly dispersed in the polypropylene, and meanwhile, the problem of compatibility between the cycloolefin copolymer and the polypropylene is well solved.

The application discloses a preparation method of a composite antioxidant and application thereof, and belongs to the field of high polymer materials. In the application, a ring octene and a silicon-containing cyclic olefin monomer are subjected to metathesis copolymerization under the action of a metathesis catalyst, a silicon-containing polymer is obtained after chemical hydrogenation, and then the composite antioxidant is obtained after hydrolysis and mixing with lignin. The main chain of the composite antioxidant is a saturated hydrocarbon chain, the compatibility with polyethylene is high, the silicon-containing polymer is hydrolyzed to generate active silanol, the active silanol is efficiently bonded with lignin, and the lignin provides natural polyphenol antioxidant function. The application realizes efficient antioxidant of the composite material, high compatibility and long-term durability, and provides a new idea for high-performance environment-friendly high polymer composite materials.

The application provides a polydicyclopentadiene / glass fiber felt composite material and a preparation method thereof. The method comprises the following steps: step (1): laying a glass fiber felt on a glass plate, sequentially laying a release cloth, a flow guide net and a vacuum bag, and performing vacuum pumping and pressure maintaining; step (2): pouring a cyclic olefin liquid into the vacuum bag in step (1), performing stage temperature rising and curing, and releasing a polydicyclopentadiene / glass fiber felt composite material. The cyclic olefin liquid is configured as follows: A1, uniformly mixing 100 parts by mass of DCPD and 5-20 parts by mass of a TCPD system to prepare a mixed solution; wherein the TCPD system comprises 10wt% of TCPD and 90wt% of DCPD; A2, dissolving 0.02-0.06 parts by mass of a Grubbs second-generation catalyst and 0.002-0.006 parts by mass of a retarder in 1-2 parts by mass of a high-boiling-point silane coupling agent, and adding the mixture into the mixed solution in step A1 to prepare a liquid. The method adopts a vacuum-assisted resin infusion molding (VARI) technology, has the characteristics of simple operation and rapid reaction, and the obtained composite material has high mechanical properties.

The invention relates to a method and device for preparing low-carbon olefins, and the method comprises the following steps: S1, contacting raw oil with a catalytic conversion catalyst in a catalytic conversion reactor for catalytic conversion reaction to obtain a catalytic conversion reaction product; s2, separating the catalytic conversion reaction product to obtain ethylene and propylene as well as a first circulating olefin flow containing butene and / or a second circulating olefin flow containing C5 + olefin; s3, enabling the olefin material to enter an etherification unit, and contacting the olefin material with an alcohol raw material under an etherification condition to obtain a circulating ether material and etherified olefin; and S4, enabling at least one part of etherified olefin to enter an isomerization unit, and carrying out isomerization reaction in the presence of an isomerization catalyst to obtain isomerized olefin. According to the method disclosed by the invention, the conversion of ethers into low-carbon olefins can be realized, the yield and selectivity of ethylene and propylene are improved, the yield of methane is reduced, the content of methanol in the product is reduced to the greatest extent, and the conversion of low-cost methanol into low-carbon olefins is realized.

Provided is an olefin-based heat-shrinkable multilayer film that is substantially free of a cyclic olefin-based resin, is easy to use for solvent bonding and gravity separation, and has excellent heat shrinkability and transparency.　The olefin-based heat-shrinkable multilayer film comprises a first surface layer and a second surface layer, which are derived from a polystyrene-based resin, and an intermediate layer derived from a polyolefin-based resin, wherein (a) the polystyrene-based resin contains at least 50 wt% of a styrene-butadiene copolymer, (b) the crystal melting enthalpy of the intermediate layer is set to a value of 135 mJ / mg or less, (c) the thermal shrinkage rate in the TD direction is 50-80% under the shrinkage conditions of 100°C and 10 seconds, (d) the haze value is 10% or less, and (e) the specific gravity is 0.95 or less.

This invention provides a resin that combines high refractive index, high heat resistance, and low birefringence. The cyclic olefin copolymer hydride of this invention is formed by hydrogenating a cyclic olefin copolymer, wherein the cyclic olefin copolymer comprises structural units from 1-naphthylnorbornene and structural units from 2-naphthylnorbornene, and the average internal bulk ratio of 1-naphthylnorbornene to 2-naphthylnorbornene is 50 mol% or more. The cyclic olefin copolymer hydride of this invention is preferably used as a material for optical components such as optical lenses.

A resin composition comprising a cyclic olefin copolymer (A) and a fatty acid ester composition (B) comprising pentaerythritol (B-1) and a fatty acid ester (B-2) of pentaerythritol, the cyclic olefin copolymer (A) includes at least one olefin-derived repeating unit (a) represented by general formula (I), and at least one cyclic olefin monomer-derived repeating unit (b) selected from the group consisting of a repeating unit (AA) represented by general formula (II), a repeating unit (AB) represented by general formula (III), and a repeating unit (AC) represented by general formula (IV). When the total content of pentaerythritol (B-1) and the fatty acid ester (B-2) of pentaerythritol in the fatty acid ester composition (B) is taken as 100 mass%, the content of pentaerythritol (B-1) in the fatty acid ester composition (B) is 5.0 mass% or less.

Systems and processes for the production of circular products, including circular olefins and circular products derived from the circular olefins, by feeding particular hydrocarbons derived from one or more feed source to steam cracking and to fluid catalytic cracking and by sending the product of steam cracking and the product of fluid catalytic cracking to an integrated separation system. The circular olefins can be used in any downstream process to produce any circular product, such as a circular product produced through polymerization, oligomerization, or hydrogenation of the circular olefins.

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.

To provide a method for recycling a thermoplastic resin molding capable of recycling the thermoplastic resin molding in such a state that metallic foreign matter mixed in a state of adhering to a pulverized product is little when the thermoplastic resin molding is recycled as a thermoplastic resin or a thermoplastic resin composition.SOLUTION: The method for recycling a thermoplastic resin or a thermoplastic resin composition as a constituent material of a thermoplastic resin molded product includes a step of grinding the thermoplastic resin molded product in a temperature range of (A) or (B) below by a grinder. (A) when the thermoplastic resin is a resin other than a cyclic olefin resin, (Ambient temperature at which elastic modulus of the thermoplastic resin is reduced by half) - 15°C. or higher, and (melting point of the thermoplastic resin) - 10°C, or lower. (B) when the thermoplastic resin is a cyclic olefin resin, (glass transition temperature (Tg) of the cyclic olefin resin) - 15°C. or higher and (flow starting temperature of the cyclic olefin resin) - 10°C, or lower.SELECTED DRAWING: None

Described herein are thermoplastic vulcanizate compositions including a thermoplastic matrix including a cyclic olefin copolymer and an oil and particles dispersed in the thermoplastic matrix and including at least partially crosslinked rubber. The thermoplastic vulcanizate compositions have a tan delta curve including a peak occurring between about -20 °C to about 90 °C and having a peak value of about 0.1 to about 2.0.

Embodiments in accordance with the present invention encompass compositions containing the polymer formed from a variety of polycycloolefinic monomers at least one of which monomer contains an additional unpolymerized ethylenic bond, melamine, clay such as bentonite or montmorillonite, optionally fillers such as hexagonal boron nitride or silica, a crosslinker, a free radical initiator, a tackifier and one or more suitable additives. The compositions of this invention can be formed into a variety of three-dimensional insulating articles upon exposure to suitable high temperature, such as for example films. The objects formed from the compositions of this invention exhibit hitherto unattainable low dielectric constant and low-loss properties, fire-retardancy and very high thermal properties. The compositions of this invention are useful in various applications, including as insulating materials in millimeter wave radar antennas, among others. The films formed from the compositions of this invention exhibit a UL-94 rating of at least V-1, dielectric constant (Dk) less than 2.9 and dielectric dissipation factor (Df) of less than 0.003.

This invention discloses a method for preparing an impact-resistant cyclic olefin copolymer, comprising the following steps: preheating the cyclic olefin monomer under an inert atmosphere and then cooling it to obtain a cyclic olefin prepolymer; mixing the cyclic olefin prepolymer, catalyst, and solvent, introducing unsaturated olefins to initiate a polymerization reaction, controlling the amount of unsaturated olefins added, and initiating a ripening reaction to obtain mixture 1; mixing mixture 1 with a hydrogenation catalyst, controlling the hydrogenation reaction to obtain mixture 2; removing the hydrogenation catalyst and solvent from mixture 2 to obtain the impact-resistant cyclic olefin copolymer. Preheating before polymerization broadens the range of control over polymer properties by the cyclic olefin monomers. It ensures complete conversion of the cyclic olefin monomers during polymerization, eliminating the need for monomer separation, and yielding an amorphous cyclic olefin copolymer with excellent impact resistance.

This invention discloses a polyolefin composite material, its preparation method, and its application. The polyolefin composite material comprises the following components by weight: 88-112 parts polyolefin resin; 0.5-4 parts organic pigment yellow; 0.1-1.5 parts phthalocyanine green; and 1-15 parts dispersing agent. The dispersing agent comprises polar-group grafted olefin polymers and / or aromatic cyclic olefin copolymers. The polar groups in the polar-group grafted olefin polymers include one or more of the following: phosphate ester groups, phosphate groups, sulfonic acid groups, sulfonate groups, carboxylic acid groups, carboxylate groups, amino groups, quaternary ammonium salt groups, amide groups, acrylic acid groups, or maleic anhydride groups. This invention, by adding specific dispersing agents to a high-chroma polyolefin system, obtains a polyolefin composite material with high chroma and good precipitation performance.

The invention discloses tear-resistant bio-based resin with low heating loss as well as a preparation method and application of the tear-resistant bio-based resin, and belongs to the technical field of resin. The preparation method of the resin comprises the following steps: carrying out polymerization reaction on cyclopentadiene and derivatives thereof and a bio-based olefin monomer in the presence of a first solvent, and then adding alpha-olefin for continuous reaction to obtain a polymerization solution A; carrying out flash evaporation on the polymer liquid A to obtain a bio-based cycloolefin copolymer B; removing impurities from the bio-based cycloolefin copolymer B in the presence of a second solvent, and then reacting the bio-based cycloolefin copolymer B with bio-based carboxylic acid and a peroxide initiator to obtain a polymer solution C; and mixing the polymer solution C with organic alcohol and a surfactant, and removing unreacted monomers, an initiator decomposition product, an unreacted solvent and oligomers to obtain the tear-resistant bio-based resin. The resin prepared by the method has the advantages of low heating loss and strong tear resistance, has good dynamic performance and higher modulus at a lower acid value, and has better weather resistance than a traditional product.

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 surface modification method of a cycloolefin copolymer membrane material, and belongs to the technical field of high polymer materials. The surface modification method of the cycloolefin copolymer membrane material comprises the following steps: (1) putting a cycloolefin copolymer membrane into an acid mixed solution, and carrying out acid treatment; after acid treatment, filtering, washing and drying to prepare an acid-treated cycloolefin copolymer membrane; (2) putting the cycloolefin copolymer membrane subjected to acid treatment into a solvent, adding an amination reagent under a stirring condition, and heating to react; and after the reaction is finished, washing and drying to obtain the surface-modified cycloolefin copolymer film. The surface-modified cycloolefin copolymer membrane prepared by the invention has good hydrophilic performance, and the contact angle can be as low as 69 degrees; the mechanical property is slightly reduced, but the use is not influenced; the amino content is higher; the protein FITC-BSA with green fluorescence can be better adsorbed; therefore, subsequent development and research of biological materials are facilitated.

The invention relates to the technical field of cables, and provides a flame-retardant aluminum alloy core low-voltage control cable and a preparation method thereof. A flame-retardant aluminum alloy core low-voltage control cable sequentially comprises a cable core, a wrapping layer and a sheath layer from inside to outside. The cable core sequentially comprises an aluminum alloy conductor, an insulating layer, an armor layer and an isolating layer from inside to outside; the sheath layer comprises the following raw materials in parts by weight: 100-120 parts of polyethylene, 25-35 parts of an ethylene-vinyl acetate copolymer, 6-8 parts of a cycloolefin copolymer, 35-45 parts of a flame retardant, 2-4 parts of an antioxidant, 1-3 parts of a lubricant and 3-5 parts of a plasticizer; the flame retardant is of a core-shell structure, the inner core is hydromagnesite, and the outer shell is dodecylamine pyrophosphate; the flame retardant is prepared from the following raw materials in parts by weight: 100 parts of hydromagnesite, 20 to 30 parts of pyrophosphoric acid and 25 to 35 parts of lauryl amine. According to the technical scheme, the problem that a low-voltage control cable in the prior art is poor in flame retardant property is solved.

The invention belongs to the technical field of photovoltaic modules, and particularly relates to a resin-based composite material applied to a photovoltaic module and a preparation method of the resin-based composite material. The preparation method of the resin-based composite material comprises the following steps: S1, dispersing a mixture of a cyclic olefin material, a curing agent and a coupling agent to obtain a blend; s2, mixing the blend obtained in the step S1 with fibers, and carrying out pultrusion to obtain a pre-cured molded body; and S3, carrying out secondary processing on the pre-cured molded body obtained in S2 to obtain the composite material. The bending strength, ultraviolet resistance and salt spray corrosion resistance of the composite material prepared by the method provided by the invention are greatly improved.

To provide a compact that is less in the discoloration due to electron beam or gamma ray irradiation, and, is excellent in the heat resistance.SOLUTION: A cyclic olefinic copolymer composition comprising a cyclic olefin copolymer (P) and a stabilizer (S), in which the cyclic olefinic copolymer (P) has a constituent unit (A) derived from alpha-olefin having 2 to 20 carbon atoms, a constituent unit (B) derived from a cyclic olefin not having an aromatic ring, and a constituent unit (C) derived from a cyclic olefin having an aromatic ring, and the stabilizer (S) has a phenolic hydroxide group and phosphorous.SELECTED DRAWING: None

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.

To provide a molded article containing a quantum dot material having a perovskite-type crystal structure, in which the shift of the emission wavelength peak over time is suppressed. [Solution] A molded article comprising a quantum dot material having a perovskite crystal structure, an alkali metal having a smaller ionic radius than the A-site material constituting the A-site of the perovskite crystal structure of the quantum dot material, and a cyclic olefin polymer, wherein the content of the alkali metal relative to the A-site material of the quantum dot material is 0.05 mol% or more.

The disclosure provides certain porous membranes comprised of cyclic polyolefin polymers, such as poly(norbornene)s. In one embodiment, a poly(norbornene) polymer is dissolved in tetrahydrofuran, cast into a film and subjected to solvent induced phase separation to provide a porous filter membrane (i.e., film).

The purpose of the present invention is to provide: a cyclic olefin ring-opening polymer hydride which has both an Abbe number of an appropriate size and a low birefringence; and a starting material for the cyclic olefin ring-opening polymer hydride. This cyclic olefin ring-opened polymer is characterized by containing a structural unit (A) derived from a norbornene imide monomer represented by formula (1) and a structural unit (B) derived from a cyclic olefin monomer that does not have a polar group. The cyclic olefin ring-opening polymer hydride according to the present invention is characterized by being obtained by hydrogenating the cyclic olefin ring-opening polymer according to the present invention.