76 results about "Cyclo olefin polymer" patented technology

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

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

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

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

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

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

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

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

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

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

The application belongs to the technical field of adhesives, and relates to a temporary bonding support material and a preparation method and application thereof. The temporary bonding support material is obtained by polymerization of a cyclic olefin monomer or polymerization of a cyclic olefin monomer and an olefin monomer. The cyclic olefin monomer has a structure shown in formula I, and the olefin monomer has a structure shown in formula II. The obtained cyclic olefin polymer obtained by polymerization of the specific monomers is selected as the main component of the temporary bonding support material. The rigid cyclic structure contained in the main chain of the cyclic olefin polymer can effectively limit the chain segment movement. The saturated carbon hydrogen main chain contained in the cyclic olefin polymer has a hydrophobic nature and a dense amorphous structure which can block the penetration of water molecules. The obtained temporary bonding support material has the characteristics of high modulus and high glass transition temperature at high temperature, and also has excellent water vapor resistance.

The application discloses a high-barrier cycloolefin polymer and a preparation method thereof. The high-barrier cycloolefin polymer has a structural unit shown in formula I. Compared with a commercially available cycloolefin polymer, the high-barrier cycloolefin polymer has obviously improved water and oxygen barrier rate, and meanwhile, the high-barrier cycloolefin polymer still has the advantages of high optical transmittance and high heat resistance of the cycloolefin polymer.

The application discloses a catalyst, a preparation method and application thereof, a hydrogenation method of a cyclic olefin polymer, and the polymer. The catalyst comprises a carrier and a nickel element supported on the carrier; the carrier comprises a base material and a light rare earth element; the base material is SiO2 and / or Al2O3; the proportion of the nickel element is 5wt.%-30wt.% based on the total mass of the catalyst; the proportion of the light rare earth element is 0.5wt.%-10wt.%; the proportion of the base material is 60wt.%-94.5wt.%; and the specific surface area of the catalyst is not less than 80m 2 / g. When the catalyst is used for hydrogenation of the cyclic olefin polymer, the catalyst has high activity, is easy to separate, has long service life, and can be recycled.

The present application relates to the technical field of olefin polymerization (IPC classification number is C08F210 / 02), and particularly relates to a preparation method of a catalyst and application of the catalyst in preparation of polar cyclic olefin polymers, the preparation method comprises the following steps: adding benzene series, pyridine, a nickel source and a ligand into a container, stirring and reacting at normal temperature, filtering after the reaction is completed, and freeze-drying the filtrate to obtain the catalyst, the weight ratio of the benzene series, the pyridine, the nickel source and the ligand is (0.1-0.4):(7-10):(0.7-1.0):(2.5-3.0). The prepared catalyst improves the polymerization activity on the basis of the prior art, the prepared polymer has high molecular weight and high comonomer insertion rate, the catalytic system has strong water and oxygen resistance, harsh material purification is not needed, oxygen and water are not needed to be removed in the polymerization process, and complex industrial equipment conditions are avoided.

The invention relates to a method for producing a film (A), comprising the following steps: generating a film (A) having at least one layer having 70 wt% of one or more polypropylene and 10 to 30 wt% of one or more cycloolefin polymers; and-longitudinally stretching the film (A) by means of a longitudinal stretching unit (16) having at least one pair of stretching rollers (40), a main stretching gap (S1) being formed between the stretching rollers (40) of the at least one pair of stretching rollers (40), the size of the main stretching gap (S1) being at least 30 mm. A system (10) for producing a film (A) is also shown.

An article of manufacture according to the present invention comprises a composition including a glycosaminoglycan, a local anesthetic, and a buffer packaged in a syringe or vial constructed from either glass or a plastic selected from the group consisting of cyclic olefin polymer, cyclic olefin copolymer, or high density non-nucleated polypropylene. The composition has unexpectedly improved stability on storage. The composition can be formulated for treatment of a urinary tract disease or condition, such as interstitial cystitis, also known as bladder pain syndrome or hypersensitive bladder syndrome.

The invention provides an antibacterial modified cycloolefin polymer, a preparation method thereof and a cycloolefin polymer antibacterial modified film, and the preparation method of the antibacterial modified cycloolefin polymer comprises the following steps: S1, carrying out group modification on the surface of a cycloolefin polymer to obtain a carboxyl modified polymer; s2, an antibacterial group is connected to the carboxyl modified polymer through a chemical means, the antibacterial group is provided by quaternary ammonium salt, and the antibacterial modified cycloolefin polymer is obtained. The preparation method comprises the following steps: treating the surfaces of cycloolefin polymer or derivative particles thereof through a strong oxide to obtain carboxyl groups, connecting antibacterial groups to the surfaces of the cycloolefin polymer or derivative particles in a chemical reaction manner under an acidic condition, and carrying out extrusion film blowing on the modified plastic particles by using a film blowing machine to obtain the antibacterial plastic particles. The cycloolefin polymer modified film with the antibacterial effect is obtained.

The present invention provides a resin composition for display elements that exhibits excellent coatability and whose cured product has excellent low dielectric properties and heat resistance. [Solution] A resin composition for a display element containing a curable resin and a photocationic polymerization initiator, wherein the curable resin comprises at least one selected from the group consisting of a cationic polymerizable compound having a vinyl group, a cationic polymerizable compound having an isopropenyl group, and a cationic polymerizable compound having a vinyl ether group, and the resin composition for the display element further comprises at least one polymer selected from the group consisting of hydrogenated petroleum resin and cycloolefin polymer, wherein the content of at least one polymer selected from the group consisting of hydrogenated petroleum resin and cycloolefin polymer in a total of 100 parts by mass of the curable resin and at least one polymer selected from the group consisting of hydrogenated petroleum resin and cycloolefin polymer is 5.1 parts by mass or more and 15.0 parts by mass or less.

The present invention relates to a composition comprising 83 wt.% to 87 wt.% of a polypropylene homopolymer and 13 wt.% to 17 wt.% of a cycloolefin polymer comprising cycloolefin units wherein the content of the cycloolefin units is in the range of 82 wt.% to 86 wt.%, based on the total weight of the cycloolefin polymer. Furthermore, the present invention relates to a film comprising the composition wherein the film may be a cast film or a biaxially oriented film. In addition, a capacitor including the biaxially oriented film is also provided.

The invention provides a cycloolefin polymer, a preparation method thereof and an optical film. In the structure of the cycloolefin polymer, at least part of repetitive units contain substituent groups, and the substituent groups are selected from any one of methyl, ethyl, isopropyl, tert-butyl and phenyl. According to the present invention, the cycloolefin polymer structure has the substituent group, such that the space is not easily stacked, and the crystallization trend can be effectively eliminated so as to avoid the turbidity of the formed cycloolefin polymer during the hydrogenation process due to the crystallization, and improve the optical performance of the prepared optical film.

The application provides a cyclic olefin polymer, a colored cyclic olefin polymer film and a preparation method and application thereof, and belongs to the technical field of organic polymer materials.The cyclic olefin polymer has a structure shown in formula IV.The colored plastic film is prepared by using the color developing characteristics of the functional groups without using color pigments.The colored cyclic olefin polymer film has good color fastness, excellent aging resistance, good color uniformity and excellent biodegradability.The application solves the problem of secondary pollution to the environment after the degradation of the existing colored plastic using pigments.

The invention relates to the field of high polymer materials, and particularly discloses a scratch-resistant ABS alloy material and a preparation method thereof. The scratch-resistant ABS alloy material comprises the following raw materials in parts by weight: 80-120 parts of ABS resin, 20-30 parts of a cycloolefin polymer (COP), 10-20 parts of polymethyl methacrylate, 10-25 parts of a compatilizer, 6-10 parts of a flexibilizer, 2-6 parts of a scratch-resistant agent, 1-3 parts of an anti-aging agent, 2-5 parts of a lubricant, 1-3 parts of a dispersant and 5-10 parts of a filler. The preparation method comprises the following steps: uniformly mixing the ABS resin, the cycloolefin polymer COP and the polymethyl methacrylate to obtain a primary mixture; adding a compatilizer, a flexibilizer, an anti-scratch agent, an anti-aging agent, a lubricant, a dispersant and a filler into the primary mixture to obtain a mixture; the mixture is subjected to melt blending extrusion at 200-220 DEG C, granulation and cooling, and a finished product is obtained. The scratch resistance is good.

The invention provides a catalyst for COP (cycloolefin polymer) polymerization as well as a preparation method and application of the catalyst. The catalyst consists of an active component and an auxiliary agent. The active component is a homogeneous complex formed by divalent or trivalent ruthenium salt and a specific phosphine ligand, the auxiliary agent is an alkylaluminoxane compound, and the addition amount of the auxiliary agent is 3-8% of the mass of the active component. The preparation method of the catalyst comprises the steps of ruthenium precursor solution preparation, ligand complexation reaction, assistant introduction, crystallization and purification and the like, and is realized by accurately controlling reaction conditions and parameters. In application, the catalyst can act with a cycloolefin monomer under a ring-opening metathesis polymerization reaction condition, a new way is provided for synthesis of a cycloolefin polymer COP, the problems of low catalytic efficiency and many side reactions in COP polymerization are solved, and research and development of the catalyst have important significance on optimization of a COP polymerization process and improvement of polymer performance.

The invention relates to a partially hydrogenated cycloolefin polymer as well as preparation and application thereof, and the partially hydrogenated cycloolefin polymer is prepared by the following steps: carrying out metathesis ring-opening polymerization on an alkene monomer containing at least two ring structures to obtain a cycloolefin polymer, and then carrying out hydrotreating until the hydrogenation ratio is 20-80%. Compared with the prior art, the method has the advantages that the phase difference film with high added value can be directly prepared from petrochemical products such as styrene and butadiene, a monomer redesign synthesis stage is not needed, the hydrogenation rate does not need to reach 100% in the hydrogenation process, and the method has the cost advantage in the aspects of raw materials and the production process.

The invention discloses a polypropylene composite material and a preparation method and application thereof, the polypropylene composite material comprises a polymer component accounting for 95-100% by weight of the composite material, and the polymer component comprises a) polypropylene and b) a cycloolefin polymer component; wherein the weight percentage of the polypropylene accounts for 70%-95% of the weight percentage of the polymer component; the cycloolefin polymer component at least contains one CBC (cycloolefin block copolymer) or COP (cycloolefin polymer) and at most contains one COC (cycloolefin copolymer); the mechanical loss factor tan delta of an unstretched film formed by the polypropylene composite material at 125 DEG C is less than or equal to 0.12, wherein the mechanical loss factor tan delta is measured under the conditions that the thickness is 0.5 mm, the stretching mode is adopted, the vibration frequency is 1Hz and the temperature rising speed is 5 DEG C / min. According to the invention, a specific type of cycloolefin polymer component is added into polypropylene, and the range of a mechanical loss factor tan delta of an unstretched film formed by the composite material at 125 DEG C is controlled, so that the film-forming property of the composite material and the high-temperature dielectric strength of a capacitor film formed by the composite material can be remarkably improved.

The invention provides a cycloolefin isomer composition and a preparation method thereof, a cycloolefin polymer and an optical film. The cycloolefin isomer composition comprises the following components in percentage by mass: 0.1-50% of an endoisomer; and the exo-isomer content is 50-99.9%. Compared with a pure endoisomer, the cycloolefin isomer composition with the exoisomer combined with the endoisomer has different stereoselectivity in arrangement of polymer molecular chains in the synthesis process of the polymer, so that the structure and performance of the polymer can be adjusted; by controlling the proportion of the internal and external isomers in the cycloolefin isomer composition, the solubility, crystallinity, melting point, glass transition temperature, light transmittance and other properties of the polymer obtained by polymerization of the composition can be greatly improved.

The invention provides a method for regulating and controlling molecular weight distribution of a cycloolefin polymer. The method comprises the following steps: carrying out ring-opening metathesis polymerization reaction on cycloolefin serving as a monomer under the catalysis of a compound catalyst system to obtain a cycloolefin polymer; the cycloolefin polymer is a cycloolefin polymer with bimodal molecular weight distribution. According to the technical scheme, the molecular weight distribution of the cycloolefin polymer can be effectively designed and regulated, and the molecular weight distribution of the cycloolefin polymer is bimodal, including regulation of the relative height of the bimodal, the distance between the bimodal, two peak values, peak width and the like in the molecular weight distribution, so that the cycloolefin polymer has a prominent prospect in the aspect of optimizing the performance of the cycloolefin polymer.

The present application belongs to the technical field of shrink film processing, and particularly relates to a label film with strong printing ink adaptability, low haze and low density, a preparation method and application thereof. The modified resin material is obtained through grafting reaction of acrylic acid and epoxy resin, and then is blended and granulated with cyclic olefin polymer to obtain a modified surface film layer base material. Finally, the label film with a density less than 0.96 g / cm<3> is prepared through improvement of subsequent three-layer co-extrusion process conditions, so that it can float on the surface of water after being crushed, and is separated from other components by flotation due to the density difference. Meanwhile, the label film obtained by the present application has strong printing ink adaptability and low haze, and can significantly improve the adhesion effect and stability of ink on the surface thereof. In addition, the label film obtained by the present application has good opening property. 3 ​