116 results about "Cyclic olefin copolymer" patented technology

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.

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.

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.

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 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 application discloses a low-friction large-flow PE water conveying composite pipe and a preparation method thereof, characterized in that the composite pipe comprises a colored HDPE layer on the outside and a COC-HDPE modified layer on the inside; the colored HDPE layer comprises the following components in parts by weight: 90-100 parts of HDPE resin, 2-2.5 parts of carbon black, 1-3 parts of a processing dispersing aid, and 0.6-1.2 parts of a lubricant; and the COC-HDPE modified layer comprises the following components in parts by weight: 90-100 parts of HDPE resin, 5-10 parts of a cyclic olefin copolymer, 3-5 parts of a processing dispersing aid, and 0.6-1.2 parts of a lubricant. The application has good pressure resistance and weather resistance, reduces surface resistance, and improves water conveying capacity.

The invention relates to the technical field of polyolefin, in particular to a polyolefin catalyst, a ligand of the polyolefin catalyst and a preparation method and application of the polyolefin catalyst, and the polyolefin catalyst is an alpha-diimine ligand with a general formula structure shown in a formula L. In the formula, R1-R11 are independently selected from H, C1-C6 alkyl, C1-C6 alkoxy, C6-C12 aryl or halogen respectively. The catalyst with a novel structure is prepared, the catalyst is high in thermal stability and catalytic activity and can be well applied to preparation of the cycloolefin copolymer through catalytic polymerization, the insertion rate of cycloolefin monomers is increased, the glass-transition temperature can be increased, the copolymer has narrow molecular weight distribution, high cycloolefin content and excellent heat resistance, and the catalyst can be applied to preparation of the cycloolefin copolymer through catalytic polymerization. And the requirements of high-end optical materials are met.

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.

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.

The application belongs to the technical field of high polymers, and particularly relates to a blended modified material with wave-absorbing shielding function and a preparation process. The blended modified material with wave-absorbing shielding function comprises the following raw materials in parts by mass: PBT 55-75 parts, modified nanocellulose aerogel 10-20 parts, norbornene type cyclic olefin copolymer 5-15 parts, toughening agent 2-7 parts, lubricant 1-3 parts, antioxidant 0.5-2 parts, and porous polystyrene microspheres 0.5-1 part. The application provides a blended modified material with wave-absorbing shielding function and a preparation process. The blended modified material provided by the application has excellent wave-absorbing shielding performance at 77GHz, excellent Izod notched impact strength and excellent chemical resistance, and can be applied to a vehicle-mounted millimeter wave radar cover.

The application relates to the technical field of high polymer materials, and particularly discloses a longitudinal easy-to-cut PE film and a preparation method thereof. The longitudinal easy-to-cut PE film comprises an outer layer, a middle layer and an inner layer which are sequentially contacted; the inner layer comprises the following raw materials in parts by weight: first low-density polyethylene, linear low-density polyethylene, metallocene ultra-low-density polyethylene, a PPA additive, a slip agent, an antioxidant and an opening agent; the middle layer comprises the following raw materials in parts by weight: high-density polyethylene, second low-density polyethylene, polypropylene, a cyclic olefin copolymer, a PPA additive, a filler and an antioxidant; and the outer layer comprises the following raw materials in parts by weight: second low-density polyethylene, linear low-density polyethylene, a PPA additive and an antioxidant. The longitudinal easy-to-cut PE film has the advantages of small tensile strength, longitudinal tear strength and impact strength, easy cutting, and no burr and wire drawing in the cut.

The application discloses a kind of high-performance polypropylene material, polarizing material and its preparation method and application, belong to high polymer material technical field.The high-performance polypropylene material provided by the application includes: PP matrix resin 70-90 parts, cyclic olefin copolymer 5-15 parts, reactive monomer 0.5-2 parts, terminal hydroxyl hyperbranched polyester 0.5-2.0 parts, crown ether modified nano zinc oxide 1-5 parts, ionomer precursor 0.1-0.5 parts, initiator 0.05-0.2 parts, transparent nucleating agent 0.1-0.3 parts and antioxidant 0.2-0.5 parts by weight.The high-performance polypropylene material provided by the application has high transparency, low haze, high interfacial bonding strength, thermal stability and excellent dimensional stability, is suitable for polarizing sheet protective film field, and has good prospect.

The invention discloses a bis-carbazolyl bis-phenoxy ether complex, a preparation method thereof and an olefin polymerization method. The dicarbazolyl diphenoxy ether complex is adopted as a main catalyst to be used for catalyzing ternary polymerization of ethylene, alpha-olefin and cycloolefin, the complex provided by the invention has very good copolymerization insertion capability on both alpha-olefin and cycloolefin, a prepared copolymerization product is uniform in structure distribution, molecular chain entanglement is easy to regulate and control, and the molecular chain entanglement is uniform. The material has excellent mechanical properties, such as high strength, good toughness and excellent tensile property. The ternary cycloolefin copolymer provided by the invention has a good industrial prospect in processing application in the fields of optics, medical treatment and the like.

The application belongs to the technical field of infusion bag films, and provides a four-layer infusion film, which comprises an outer layer, a secondary outer layer, a middle layer and an inner layer.The outer layer comprises the following raw material components and weight fractions: 20-35 parts of nano zinc oxide and 50-80 parts of amino acrylate.The secondary outer layer comprises the following raw material components and weight fractions: 70-90 parts of homopolymer polypropylene and 10-30 parts of elastomer.The middle layer comprises the following raw material components and weight fractions: 20-40 parts of copolymer polypropylene, 40-60 parts of elastomer and 10-20 parts of cyclic olefin copolymer.The inner layer comprises the following raw material components and weight fractions: 60-80 parts of binary copolymer polypropylene, 20-40 parts of elastomer and 1-3 parts of chitosan.The application can sufficiently improve the bonding strength of nano zinc oxide and the film surface of the outer layer, and the adhesion is strong, thereby achieving the effect of long-term antibacterial property.

The application relates to a hydrophobic high-toughness cycloolefin copolymer and a preparation method thereof, and belongs to the technical field of polymer materials; the method comprises the following steps: grafting a silane coupling agent containing a double bond to norbornene to obtain an intermediate; reacting the intermediate and alkyl mercaptan to obtain modified norbornene; carrying out ring-opening metathesis polymerization and hydrogenation on the modified norbornene to obtain a cycloolefin copolymer; and grafting a silane coupling agent with a vinyl group to the surface of norbornene through surface grafting; due to the -CH3 and the vinyl group on the silane coupling agent, the hydrophobic property of the norbornene is improved, and the O-Si-O structure helps to improve the flexibility of the norbornene; then, alkyl mercaptan is grafted to the norbornene to further improve the hydrophobic property; finally, the modified norbornene and a large steric hindrance norbornene derivative are subjected to ring-opening metathesis polymerization and hydrogenation to obtain a cycloolefin copolymer, and the large steric hindrance norbornene helps to improve the glass transition temperature of the cycloolefin copolymer.

To provide a cyclic olefin-based copolymer which can yield an optical component with improved performance balance between heat resistance and long-term reliability of optical performance under a high temperature environment.SOLUTION: A cyclic olefin-based copolymer comprises a structural unit (a) derived from at least one olefin and a structural unit (b) derived from at least one cyclic olefin represented by formula (II), where the cyclic olefin-based copolymer has a Tg, as measured by DSC, of 135°C or more and, in a sequence of (a)-(b)-(b)-(a), the abundance ratio of a racemic structure and a meso structure, as measured by 13C-NMR, is 0 / 100 to 5.0 / 95.0.SELECTED DRAWING: None

This invention relates to the field of polymer dielectric materials and discloses a cyclic olefin copolymer / anthracene composite dielectric film for high-temperature energy storage, comprising 100 parts by weight of a cyclic olefin copolymer and 0.2 to 1.0 parts by weight of anthracene. The anthracene is uniformly dispersed in the amorphous network interstices of the cyclic olefin copolymer, utilizing the energy difference between their lowest unoccupied molecular orbitals to construct deep trap sites. By capturing free carriers injected at the electrode interface under high temperature and strong electric field conditions, electron migration is restricted, thereby blocking leakage conduction paths within the bulk phase of the material. This invention effectively reduces Joule heat accumulation during charge transport, improves the high-temperature withstand voltage and insulation reliability of the film, while maintaining relatively low dielectric loss. This all-organic blend system avoids local electric field distortion caused by inorganic filler agglomeration, and the preparation process is simple and mild, facilitating large-scale engineering applications.

A multilayer conductor includes a conductor layer and a dielectric layer on the conductor layer. The dielectric layer includes a polymer composition having a dissipation factor (Df) of less than 0.001 and includes a cyclic olefin copolymer, a transoctenamer rubber, syndiotactic polystyrene, a polymethylpentene olefin copolymer, or a combination thereof. The materials described herein can advantageously provide an improved adhesive strength between the conductor and the dielectric layer. Methods for the manufacture of the multilayer conductor are also described. The multilayer conductor can be useful in the preparation of magnetic selfresonant structures.

The invention relates to the technical field of composite materials, in particular to a high-transparency low-haze flame-retardant polycarbonate composite material as well as a preparation method and application thereof. The invention provides a high-transparency and low-haze flame-retardant polycarbonate composite material as well as a preparation method and application thereof, aiming at the problem that modified polycarbonate cannot give consideration to high light transmittance, low haze, high modulus and high flame retardance in the prior art. Comprising polycarbonate resin, cycloolefin copolymer resin, surface fluorinated silicon dioxide nanoparticles, surface modified C-glass fibers, a core-shell structure flame retardant, a potassium perfluorobutanesulfonate ionic liquid complex, an anti-dripping agent, an antioxidant and an ultraviolet absorbent. According to the invention, through PC / COC matrix refractive index matching and surface modified C-glass fiber surface five-layer gradient coating design, an ultralow refractive index is realized, surface fluorinated silica nanoparticles fill interface microdefects, extremely low interface light scattering is realized, and a highly transparent state is presented.

Provided is a cyclic olefin copolymer production method that can produce, with high efficiency, a cyclic olefin copolymer that is a copolymer of a cyclic olefin monomer and an α-olefin monomer having 3-20 carbon atoms and that has excellent toughness.　According to the present invention, a copolymer of a cyclic olefin monomer and an α-olefin monomer having 3-20 carbon atoms is produced using a method comprising: a first polymerization for polymerizing monomers including the cyclic olefin monomer and the α-olefin monomer in a polymerization vessel in the presence of a titanocene catalyst, an alkyl aluminum compound, and a borate compound; addition of an alkyl aluminum compound solely to the polymerization vessel after the first polymerization; and a second polymerization for further adding the monomers into the polymerization vessel after the addition of the alkyl aluminum compound, and continuously polymerizing the monomers.

The invention relates to the technical field of polyolefin, in particular to a polar cycloolefin copolymer and a preparation method and application thereof.In an inert solvent, ethylene and a polar cycloolefin monomer serve as raw materials, copolymerization is conducted through a catalyst composition, and the catalyst composition comprises a post-transition nickel catalyst, a post-transition palladium catalyst and a cocatalyst, wherein the structural formula of the post-transition nickel catalyst is shown as a formula C, and the structural formula of the post-transition palladium catalyst is shown as a formula D. The cycloolefin copolymer contains polar groups, has the characteristics of narrow molecular weight distribution, high polar monomer insertion rate, high transparency, good thermal stability and the like, and is expected to be applied to the fields of high-end optical materials and medical materials.