16 results about "Cyclo olefin polymer" patented technology

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 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 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).

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.

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 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.

An encapsulant film for a photovoltaic module includes an encapsulating layer and a heat resistant layer disposed adjacent to the encapsulating layer. The encapsulating layer includes polyethylene in an amount of 50% to 100%, by weight. The heat resistant layer includes one of ethylene vinyl alcohol (EVOH), polymethyl methacrylate (PMMA), polymethyl pentene (PMP), cycloolefin polymer (COP), cycloolefin copolymer (COC), polylactic acid (PLA), polyethylene furanoate (PEF), isosorbide polymer, and polycarbonate (PC) in an amount of 50% to 100%, by weight.

This invention discloses a compound opening agent for low-density polyethylene film, an easy-opening, highly slippery, transparent linear low-density polyethylene film, and its preparation method. The compound opening agent is obtained by compounding silane-modified silica with a cyclic olefin polymer, wherein the mass ratio of silica to cyclic olefin polymer is 1:1 to 6:1. By using two opening agents in combination, this invention significantly reduces the amount of silica used compared to the prior art using silica alone, and at the same amount added, it exhibits better opening properties and transparency compared to the prior art.

The present invention relates to the technical field of novel high-end polyolefins, in particular to a high-refractive-index, transparent cyclic olefin polymer and a preparation method thereof. The cyclic olefin polymer has a structure represented by formula (I):The cyclic olefin polymer of the present invention has a refractive index of 1.62-1.70, an Abbe number of 14-25, a light transmittance greater than 90%, and a water absorption of less than 0.01%, and exhibits a glass transition temperature of 130-185° C. In addition, by using commercial catalysts, a monomer conversion of more than 99% can be achieved without crosslinking or other side reactions.

The application relates to the technical field of barrier materials, and discloses a modified cyclic olefin polymer barrier film material and a preparation method thereof, which comprises the following raw material components according to 100% of total mass percentage: 50-85% of cyclic olefin polymer; 14-45% of polyethylene; and 1-5% of organic nanosilicate; the polyethylene and the organic nanosilicate are first melt-mixed to form dispersed master batches. The barrier material is prepared from a small amount of organic nanosilicate, polyethylene and cyclic olefin polymer; the dispersion effect of the organic nanosilicate in the material is excellent; the material has excellent mechanical properties and excellent oxygen and water vapor barrier properties; the single-material polymer barrier material has very excellent comprehensive performance; the material does not need to be combined with other materials in multiple layers; and the material can be widely applied in the fields of food contact materials and medical packaging materials.

The application belongs to the technical field of high polymer materials, and particularly relates to a method for improving the weather resistance of a cyclic olefin polymer. The application first provides a monomer A for improving the weather resistance of a cyclic olefin polymer, the molecular formula of the monomer A is shown in formula (I), the introduction of a fluorine-containing heterocycle into the monomer A changes the electronic distribution and spatial structure of the monomer A, effectively improves the protection ability of the corresponding material to hygrothermal aging and flexibility, and is beneficial to the improvement of the weather resistance of the subsequent polymer. The monomer A is used in the preparation of a cyclic olefin polymer or an optical product containing the cyclic olefin polymer, which is beneficial to the improvement of the tensile strength and tear strength of the corresponding product, and the reduction of the degree of hygrothermal aging of the corresponding product. Therefore, the technical scheme of the application provides a new solution for improving the weather resistance of the cyclic olefin polymer.

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