142 results about "Cyclic olefin copolymer" patented technology

To provide resin composition particles of a cyclic olefin copolymer having curability.SOLUTION: Resin composition particles include: a thermosetting cyclic olefin copolymer (A) having a crosslinkable group; and a radical initiator (B), the radical initiator (B) being contained within the resin composition particles.SELECTED DRAWING: None

The invention discloses a photoaging-resistant thermoplastic polyolefin waterproof coiled material which comprises the following raw materials: basic resin, the material proportion of the basic resin is about 65-75%, and the basic resin comprises high-crystallinity polypropylene, metallocene polyethylene and a cyclic olefin copolymer; the material proportion of the composite stabilizing material and the composite stabilizing agent is about 4-6%, and the composite stabilizing agent comprises a nano cerium oxide coated ultraviolet light absorber, a high molecular weight hindered amine light stabilizer, a novel benzotriazole / triazine hybrid stabilizing agent and a composite antioxidant; the material proportion of the functional filler is about 18-22%, and the functional filler comprises silane coupling agent modified nano kaolin, titanate treated calcium carbonate and graphene modified glass beads; and the material proportion of the special auxiliary agent is about 3-5%, and the special auxiliary agent comprises a hyperbranched polyester plasticizer, a phosphorus-nitrogen intumescent flame retardant and a fluorine surfactant. Compared with the prior art, the invention has the advantages of strong weatherability, high tensile strength and fracture resistance.

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.

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.

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.

A cyclic olefin copolymer comprises a structural unit represented by Formula (I) and a structural unit represented by Formula (II)In the structural unit represented by Formula (II), R1 and R2 independently represent hydrogen, acryloyloxy [CH2═CH—C(O)—O—] or (methacryloyloxy)ethyleneoxy [CHCH3═CH—C(O)—O—C2H5—O—], with the proviso that R1 and R2 are not both hydrogen. The present invention also provides a curable composition comprising the cyclic olefin copolymer described above, a composite product comprising a substrate and a cured product formed from the curable composition, and a laminate comprising the cured product or the composite product.

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

An organic insulator is produced by cured resin product containing a cyclic olefin copolymer as a main component and has a cumulative luminescence amount measured by chemiluminescence measurement method of 4×105 cpm or less. The glass transition temperature of the cured product is from 134° C. to 140° C. The cumulative luminescence amount is from 8.2.8×105 cpm to 3.2×105 cpm. A wiring board includes an insulation layer and an electrical conductor layer disposed on a surface of the insulation layer, and the insulation layer is the organic insulator described above.

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.

A medical device includes an elongated body (14). At least a portion of the elongated body (14) includes a polymer blend of a polyphthalamide (PPA) and a cyclic olefin copolymer (COC) (PPA / COC). In some medical devices, the COC includes a copolymer of ethylene and norbornene having high stiffness and low moisture uptake, and the PPA includes some amount of renewable carbon content. In some medical devices that include a catheter (10), a higher stiffness proximal portion (24A) of the catheter (10) includes the polymer blend, and a lower stiffness distal portion (24B)of the catheter (10) includes an inner liner (50), an outer jacket (46), and a structural support member (48) between the inner liner (50) and outer jacket (46).

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.

A cyclic olefin copolymer comprises a structural unit represented by Formula (I) and a structural unit represented by Formula (II)In the structural unit represented by Formula (II), R1 and R2 independently represent hydrogen, acryloyloxy [CH2═CH—C(O)—O—] or (methacryloyloxy)ethyleneoxy [CHCH3═CH—C(O)—O—C2H5—O—], with the proviso that R1 and R2 are not both hydrogen. The present invention also provides a curable composition comprising the cyclic olefin copolymer described above, a composite product comprising a substrate and a cured product formed from the curable composition, and a laminate comprising the cured product or the composite product.

The present invention provides a composition for forming a molded product, comprising A a thermoplastic binder phase, and, dispersed in the thermoplastic binder phase B at least one material capable of reducing the dielectric constant and dielectric loss of the composition; wherein the thermoplastic binder phase comprises at least A.1 one or more cyclic olefin copolymers and A.2 a thermoplastic material other than a cyclic olefin copolymer; wherein the amount of B the material capable of reducing the dielectric constant and dielectric loss of the composition 5% by weight or more, relative to the total weight of the composition, and wherein the total amount the one or more cyclic olefin copolymers is from 10 to 95% by weight of the total weight of the thermoplastic binder phase A.

A method for preparing a cyclic olefin copolymer composite insulating dielectric film, belonging to the field of capacitors. This invention addresses the problem of deteriorating insulation properties and reduced energy storage efficiency in existing polymer dielectric film capacitors under high temperature or high electric field conditions. The method includes the following steps: 1. Preparing a cyclic olefin copolymer solution; 2. Preparing an anhydride-grafted cyclic olefin copolymer solution; 3. Adding a high-polarity diamine monomer to the anhydride-grafted cyclic olefin copolymer solution for reaction, followed by coating and gradient-heating thermal imidization treatment. This method is used to prepare a cyclic olefin copolymer composite insulating dielectric film.