24 results about "Cyclic olefin copolymer" patented technology

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 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.

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.

Hydrocarbon contaminant detection system using polymer film includes a sensor assembly, a syringe, a heater assembly and a controller. The sensor assembly includes a cyclic olefin copolymer (COC) film including electrically conductive materials, and can complete an electrical circuit. The COC film can dissolve in a presence of a hydrocarbon contaminant, breaking the electrical circuit. The syringe can carry a lubrication oil sample to be tested using the sensor assembly. The syringe is operable to contact the lubrication oil sample with the COC film of the sensor assembly. The heater assembly can heat the lubrication oil sample before the lubrication oil sample is loaded to the syringe. The controller can perform operations including operating the syringe to flow the heated lubrication oil sample onto the COC film of the sensor assembly at a pre-determined flowrate.

The object of the present invention is to provide a process for the production of a cyclic olefin copolymer in which the formation of a polyethylene-like impurity can be suppressed. The present invention provides a process for the production of a cyclic olefin copolymer in which a norbornene monomer and ethylene are subjected to an addition polymerization, wherein the addition polymerization is carried out under predetermined conditions in the presence of a borate compound, an alkylaluminium and a catalyst.

The application provides a cyclic olefin copolymer-furfuryl dihydrazone composite dielectric film and a preparation method thereof. The composite dielectric film comprises a cyclic olefin copolymer and furfuryl dihydrazone dispersed in the cyclic olefin copolymer, and the mass of the furfuryl dihydrazone is 0.05% to 0.3% of the mass of the cyclic olefin copolymer. The preparation method comprises the following steps: mixing and dissolving the cyclic olefin copolymer and the furfuryl dihydrazone in toluene; casting the blended solution into a film, and obtaining the film by volatilizing the toluene; and performing heat annealing treatment on the film in a vacuum drying box and peeling off the film. The energy level difference between the furfuryl dihydrazone and the cyclic olefin copolymer is used to construct deep electron traps in the film, and high-energy electrons are captured to inhibit carrier transport. Meanwhile, the intermolecular hydrogen bond is used to increase the molecular chain spacing. The application effectively improves the breakdown strength, discharge energy density and thermal stability of the composite film in a high-temperature environment, and avoids interface defects caused by inorganic fillers.

The application 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 comprises 60-100 parts of POE resin, 8-50 parts of barrier master batch, 0.5-2 parts of composite silane coupling agent, 0.5-1.5 parts of crosslinking agent and 0.2-2 parts of auxiliary crosslinking agent; the barrier master batch comprises 5-30 parts of polar functionalized grafted POE and 3-20 parts of barrier agent; and the barrier agent is a cyclic olefin copolymer COC with Tg less than 120 DEG C. The modified POE photovoltaic packaging adhesive film has high bonding strength to photovoltaic glass and low water vapor permeability while keeping the high light transmittance and PID resistance of the existing POE adhesive film; the adhesive bonding, water blocking and light transmittance problems of the POE adhesive film are solved, the inherent processing compatibility problem between the COC and the POE matrix is overcome, and the long-term reliability of the photovoltaic module is improved.

A method for producing a varnish-like cyclic olefin-based copolymer composition including a cyclic olefin-based copolymer (m) and an organic solvent, in which the cyclic olefin-based copolymer (m) includes (A) one or more repeating units derived from an olefin, (B) one or more repeating units derived from a cyclic non-conjugated diene, and (C) one or more repeating units derived from a cyclic olefin, the method includes a polymerization step of copolymerizing an olefin, a cyclic non-conjugated diene, and a cyclic olefin in a presence of a catalyst for olefin polymerization, containing a transition metal compound (A) and a compound (B), the transition metal compound (A) contains one or two or more selected from the group consisting of a transition metal compound (A-1) and a transition metal compound (A-2), and the compound (B) contains one or two or more selected from the group consisting of an organic metal compound (B-1), an organic aluminum oxy compound (B-2), and a compound (B-3) that reacts with the transition metal compound (A) to form an ion pair.

The application provides a metallocene catalyst composition and application thereof in synthesis of cyclic olefin copolymer, and belongs to the technical field of olefin catalytic polymerization. The metallocene catalyst composition is combined with an active component, the activity of the catalyst is significantly improved when the cyclic olefin copolymer is synthesized, the copolymerization performance is enhanced, and the molecular weight of the synthesized cyclic olefin copolymer is increased.

Provided is a cyclic olefin copolymer composition comprising a cyclic olefin copolymer (A) having a glass transition point (Tg) of more than 100.0°C and a cyclic olefin copolymer (B) having a glass transition point (Tg) of 100.0°C or less. When the total amount of the cyclic olefin copolymer (A) and the cyclic olefin copolymer (B) is taken to be 100 mass parts, the content of the cyclic olefin copolymer (A) is from more than 95.0 mass parts to 99.9 mass parts and the content of the cyclic olefin copolymer (B) is from 0.1 mass part to less than 5.0 mass parts.

A cyclic olefin polymer having a norbornene backbone, characterized in that the cyclic olefin polymer is a cyclic olefin copolymer or a cyclic olefin ring-opening polymer, and satisfies the following requirement (a). Requirement (a): The cyclic olefin polymer is composed of structural units (A) as chain olefins and structural units (B) containing cyclic olefins having a norbornene backbone, through… 13 The ratio of meso-racemic structures to racemic structures (racemic structure / meso-racemic structure) in the chain of the above-mentioned structural unit (B)-the above-mentioned structural unit (A)-the above-mentioned structural unit (B) determined by C-NMR is 0.01 to 100.

This invention discloses a thermoformable composite sheet and its preparation method, comprising, by weight: 40-60 parts high-density polyethylene, 10-25 parts metallocene polyethylene, 20-40 parts modified cyclic olefin copolymer, 10-20 parts inorganic filler, and 0.2-2 parts latent crosslinking agent; wherein, the modified cyclic olefin copolymer is obtained by modifying some cyclic olefin units on the cyclic olefin copolymer molecular chain with N and / or O-containing heterocyclic side groups, wherein the heterocyclic side groups are selected from one or more of oxazoline, oxazolidinone, triazolone, hydantoin, or succinimide. In preparation, the cyclic olefin copolymer is first melt-grafted with a heterocyclic modifying agent to obtain the modified cyclic olefin copolymer, then dry-premixed with the remaining components, melt-blended, extruded and cast, and finally activated at high temperature to induce crosslinking by the latent crosslinking agent. This invention controls the glass transition temperature of the cyclic olefin copolymer through heterocyclic modification, achieving high barrier properties while maintaining a wide thermoforming window.

This invention relates to the field of olefin polymerization and discloses an ethylene-cyclic olefin copolymer and its preparation method. The method for preparing the ethylene-cyclic olefin copolymer provided by the invention includes: using a catalyst composition to copolymerize ethylene with a cyclic olefin, wherein the catalyst composition comprises: a) a monometallic compound with the structure shown in formula (1), and b) a co-catalyst component. According to the method for preparing the ethylene-cyclic olefin copolymer of the present invention, the obtained ethylene-cyclic olefin copolymer has a high molecular weight.

A method for producing a cyclic olefin-based copolymer, in which the cyclic olefin-based copolymer includes (A) one or more repeating units derived from an olefin, (B) one or more repeating units derived from a cyclic non-conjugated diene, and (C) one or more repeating units derived from a cyclic olefin, a glass transition temperature of the cyclic olefin-based copolymer measured by a differential scanning calorimeter (DSC) is equal to or higher than 100°C, the method includes a polymerization step of copolymerizing an olefin, a cyclic non-conjugated diene, and a cyclic olefin in a presence of a catalyst for olefin polymerization, containing a transition metal compound (A) and a compound (B), the transition metal compound (A) contains one or two or more selected from the group consisting of a transition metal compound (A-1) and a transition metal compound (A-2), and the compound (B) contains one or two or more selected from the group consisting of an organic metal compound (B-1), an organic aluminum oxy compound (B-2), and a compound (B-3) that reacts with the transition metal compound (A) to form an ion pair.

The problems addressed by the present invention are to provide a cyclic olefin copolymer having a plurality of glass transition temperatures and good toughness, and a method for producing the same.　The present invention provides a cyclic olefin copolymer which is an addition-type polymer of a norbornene monomer and a C3-20 alpha-olefin, wherein the ratio of the number of mol of structural units derived from the alpha-olefin to the number of mol of all structural units in the cyclic olefin copolymer is 10-90 mol%, the number average molecular weight of the cyclic olefin copolymer is from more than 20,000 to 500,000, and the cyclic olefin copolymer has two or more glass transition temperatures by viscoelasticity measurement within the range of 0-350° C.

This invention relates to the field of semiconductor cutting UV anti-adhesion tape preparation technology, and discloses a high-temperature resistant, low-modulus UV anti-adhesion substrate and its manufacturing method. The substrate is an in-situ interface-anchored three-layer co-extrusion casting structure, composed of a corona layer, an interface bonding layer, and a low-modulus heat-resistant support layer; all three layers are made of high-melting-point thermoplastic resin. This invention, through the compounding of components of the corona layer, support layer, and interface bonding layer, ensures that each resin and additive plays a specific function. The corona layer is mainly composed of polyolefin elastomer (POP), which can reduce the substrate modulus and improve flexibility, thereby ensuring smooth film expansion during chip cutting and improving curved surface bonding ability; combined with cyclic olefin copolymer (COC), it improves heat resistance and reduces high-temperature shrinkage, allowing the substrate to maintain dimensional stability at 150°C; the addition of block polypropylene can improve toughness and impact resistance, while improving surface polarity, allowing the substrate to be directly coated with UV anti-adhesion tape without a primer.

This invention provides a polypropylene monofilament with low boiling water shrinkage and its preparation method, relating to the field of polypropylene monofilament technology. Based on a polypropylene monofilament with low boiling water shrinkage, the polypropylene monofilament comprises the following percentage raw materials: 89%–95% polypropylene resin, 4%–10% cyclic olefin copolymer, and 1%–2% inorganic powder; the preparation method of the polypropylene monofilament includes the following steps: S1. preparing a polypropylene monofilament melt, S2. spinning, S3. water bath cooling and crystallization, S4. oven heating and stretching, S5. heat setting and winding. A lower-temperature polypropylene spinning melt is obtained by connecting a first extruder and a second extruder in series. The nascent polypropylene filament is directly cooled and crystallized in a water bath, greatly shortening the stretching process and improving product quality stability. The polypropylene monofilament undergoes a high degree of crystallization in the water bath, exhibiting good temperature resistance and resistance to deformation, improving the spinning stability of subsequent stretching processes, and resulting in a monofilament with high roundness.

This invention relates to the field of polymer insulating materials, and discloses a cyclic olefin copolymer / anthracene composite dielectric film and its preparation method. The composite dielectric film comprises a composite film made of 100 parts by mass of a cyclic olefin copolymer and 0.1 to 2.0 parts by mass of anthracene. The anthracene is homogeneously dispersed at the molecular level within the copolymer matrix, forming a deep trap network constructed from both electron and hole deep traps within its band gap. The preparation method includes heating and stirring the raw materials in a solvent to form a homogeneous blend solution, coating the solution, allowing it to stand at room temperature for evaporation, heating and drying, and then peeling it off to form a film. By constructing a deep trap network through energy level misalignment between small molecules and the matrix, this invention effectively captures free carriers under high-temperature and strong electric field conditions, blocks long-range migration channels and reduces leakage current, while avoiding interface defects easily caused by inorganic doping, thus improving the high-temperature insulation reliability and energy storage density of the composite film.

The application discloses a surface protective film of a prism sheet and a preparation method thereof, and belongs to the technical field of protective films. The specific hydrogenated styrene copolymer, tackifying resin and monomer resin are compounded to achieve good wettability and initial adhesion of the prism sheet. The metallocene-catalyzed polypropylene and the cyclic olefin copolymer are compounded in the core layer to effectively reduce the interface light reflection loss. The antistatic composition composed of polyether amide copolymer, ethoxylated amine and glycerol monostearate is added to achieve certain antistatic effect. The composite light stabilizer is further added to build a double protection system and improve the aging resistance. The back unrolling layer, the core layer and the adhesive layer are designed as a whole, and the preparation raw materials are optimized, and the formula synergistic effect can be achieved. The prism sheet surface protective film with excellent comprehensive performance, such as excellent initial adhesion, low unrolling force, slow adhesive force growth, antistatic property, aging resistance and optical matching, can be prepared, and has a good industrial application prospect.

This invention belongs to the technical field of high-frequency and high-speed circuit board materials, specifically relating to a hydrogenated cyclic olefin-organosilicon co-crosslinked network structure resin composition, its preparation method, and its application. This invention constructs a hydrocarbon-organosilicon single-phase network through free radical co-crosslinking of a hydrogenated cyclic olefin copolymer and vinyl silicone oil. The low dipole moment of saturated alicyclic bonds and the low polarizability of Si-O-Si segments suppress the polarizability of the system. The porous silica closed-pore air phase dilutes the dielectric constant based on the equivalent medium theory. Combined with the constraint of orientation polarization by polyphenylene ether and the suppression of dipole relaxation by organosilicon, ultra-low dielectric constant and dielectric loss levels are achieved. The rigid norbornene framework and polyphenylene ether synergistically increase the glass transition temperature. The porous silica reduces the Z-axis thermal expansion coefficient through interfacial transfer via a coupling agent. The chemical bonding of the coupling agent and the crack-inhibiting effect of the fumed silica jointly improve the copper foil peel strength, demonstrating good industrialization prospects.

This invention relates to an optical film, its preparation method, and its application. The optical film comprises a polyester matrix resin and a cyclic olefin copolymer dispersed in the polyester matrix resin in particulate form, and satisfies at least the following conditions: (1) the particle size distribution coefficient is less than or equal to 0.25; (2) the particles separate from the polyester matrix resin interface to form a microporous structure, and the ratio of the pore size of the microporous structure to the particle size is 0.7~1.3; (3) the glass transition temperature of the cyclic olefin copolymer is T. g,COC The glass transition temperature of the polyester matrix resin is T. g,Polyester And T g,COC -T g,Polyester ≥40℃. The optical film of this invention has excellent reflectivity and heat resistance.

Described herein are thermoplastic vulcanizate compositions that include a thermoplastic matrix comprising a cyclic olefin copolymer and an oil and particles dispersed in the thermoplastic matrix and comprising an at least partially cross-linked rubber. The thermoplastic vulcanizate composition has a tan δ profile comprising a peak occurring between about −20° C. and about 90