149 results about "Polyvinyls" patented technology

The invention discloses an anti-fouling curtain structure for water dredging engineering, and belongs to the technical field of environment protection of dredging engineering, the anti-fouling curtain structure for water dredging engineering comprises a floating body, an anti-fouling curtain and a vertical body, the floating body is arranged at the top end of the anti-fouling curtain, the vertical body is arranged at the bottom end of the anti-fouling curtain, and the anti-fouling curtain is geotechnical cloth; the geotechnical cloth is prepared from the following components in parts by weight: 100 to 150 parts of polyester, 20 to 50 parts of copolyester and 5 to 30 parts of inorganic filler, the copolyester is a copolymer of terephthalic acid, 5-sulfoisophthalic acid sodium salt, ethylene glycol and dihydroxyl-terminated polyvinyl imidazole, and the geotechnical cloth is further prepared by a post-treatment step. According to the invention, the copolyester composed of terephthalic acid, sodium 5-sulfoisophthalic acid, ethylene glycol and dihydroxyl-terminated polyvinyl imidazole and the inorganic filler are added into the polyester fiber, and the polyester fiber is modified through a post-treatment step, so that the alkali resistance and the antifouling property of the antifouling curtain are improved.

Provided is a manufacturing method for a foamed molded body that can improve the mass production efficiency of polyethylene-based foamed molded products with high expansion ratio. The method comprises a feeding step for feeding raw material resin into an internal space of a cylinder of an extruder through a hopper; wherein the raw material resin comprises 50 mass % or more of a polyethylene-based resin; the raw material resin comprises a pulverized material produced by pulverizing a foamed body using a pulverizer; the foamed body is composed of a resin comprising 50 mass % or more of a polyethylene-based resin and has an expansion ratio of 2.0 or more; the pulverizer is configured to discharge the pulverized material from the pulverizer through an opening provided in a screen mesh; and a diameter of the opening is 8.0 mm or less.

The present invention relates to oriented, multilayer polyethylene films. In one aspect, a biaxially oriented, multilayer polyethylene film comprises: at least one inner layer comprising: (1) a polyethylene-based composition that comprises: (a) at least 97% by weight, based on the total weight of the polyethylene-based composition, of one or more polyethylenes having a density between 0.926 g / cm3 to 0.970 g / cm3 and a melt index (I2) between 0.1 to 10 g / 10 min; (b) 20 to 5000 ppm, based on the total weight of the polyethylene-based composition of a sorbitol acetal derivative comprising the structure of formula (I): wherein R1-R5 comprise the same or different moieties chosen from hydrogen and a C1-C3 alkyl.

The present disclosure provides a composite pre-lithium thin film and a preparation method thereof and related applications. The composite pre-lithium thin film comprises a loading layer having a first surface and a second surface opposite to the first surface, and the material of the loading layer comprises multi-walled carbon nanotubes; a lithium pouring layer arranged on the first surface of the loading layer; and a resistance buffer layer arranged on the second surface of the loading layer, and the material of the resistance buffer layer comprises single-walled carbon nanotubes and polyvinyl butyl, wherein the mass percentage of the single-walled carbon nanotubes is 0-80 wt.%. The scheme provided by the present disclosure can effectively improve the cycle performance and rate performance of lithium ion batteries, and solve the problems of uncontrollable pre-lithiation rate and easy breaking of lithium metal strips.

Provided is a polyvinyl alcohol-based film for polarizing film production, which has a small amount of elution of polyvinyl alcohol-based resin in water during production of a polarizing film, and which can be used to produce a polarizing film with excellent stretchability and few foreign matter defects at a good production rate. The polyvinyl alcohol-based film for polarizing film production has an elastic modulus in water at 50°C of 0.7 to 1.8 MPa.

A method of making an oven cavity of a cooking appliance, and a cooking appliance made therewith, are provided. The method includes forming a composite sheet via sheet molding compound. The composite sheet includes glass fiber impregnated with silicone polymer. An intermediate assembly is formed by disposing a layer comprising an insulative material onto a first layer of the composite sheet. The intermediate assembly is inserted into a mold. A compression load is applied to the intermediate assembly in the mold to obtain a molded piece. One or more of the molded piece forms a composite body that defines the oven cavity of the cooking appliance. The silicone polymer may include one or more of poly dimethylsiloxane, poly methylphenyl silanol, poly diphenyl silanol, and poly vinyl functional backbone silicones having methyl hydrosilane crosslinkers. The insulative material may include ceramic foam, hollow glass microspeheres, or recycled glass powder.

The present application belongs to the technical field of polymer adhesive material, and particularly relates to a resin composition for bonding polyolefin material and a preparation method thereof. The present application is prepared by formula screening optimization, and the ratio of the storage modulus E'30 at 30 DEG C to the storage modulus E'130 at 130 DEG C is greater than 100. The polyurethane resin is used in combination with butadiene-styrene copolymer with butadiene content greater than 60% and butadiene-styrene-vinylpyridine copolymer, so that the adhesive with good fusion and good adhesion to polyethylene base material is obtained. The allyl silicon modified pyridine monomer, allyl silicon modified carbazole monomer and lauryl acrylate are polymerized, and the prepared acrylate polymer is used in combination with the polyurethane resin. The pyridine group, tertiary butyl group, carbazole group and silicon atom in the acrylate polymer and the dodecyl group in the lauryl acrylate are used to improve the adhesion strength to the polyolefin base material.

The invention provides a lanthanum modified magnetic nano carbon adsorbent as well as a preparation method and application thereof, and belongs to the technical field of water treatment. The method comprises the following steps: performing catalytic pyrolysis on biomass by Fe < 3 + > to form hierarchical porous biochar; epitaxially growing a Fe3O4 magnetic layer by a hydrothermal method; carrying out free radical polymerization grafting on poly (1-vinyl imidazole); and La < 3 + > coordination loading and alkali activation. When 0.03 g / L (pH is 3-4) of the obtained adsorbent is added into phosphorus-containing wastewater, the 30-min phosphate removal rate is larger than or equal to 94%, the Langmuir adsorption capacity is larger than or equal to 117.32 mg P / g, and the adsorption retention rate is larger than or equal to 90% and the La dissolution rate is smaller than or equal to 0.2% after five times of circulation. According to the lanthanum modified magnetic nano-carbon adsorbent as well as the preparation method and the application thereof, lanthanum modification is performed on the magnetic nano-carbon, so that the obtained lanthanum modified magnetic nano-carbon adsorbent has the advantages of high adsorption capacity on phosphate in a water body, good selectivity, high removal rate, easiness in separation and recovery, small mass loss, no dissolution, no secondary pollution problem and the like.

The invention relates to an anion exchange membrane containing a composite film of an ionomer and zirconium oxide particles of formula ZrO2, the ionomer being a block polymer of formula (AB)nA, the symbol A representing a polyvinylaromatic block bearing quaternary amine groups, the symbol B representing a hydrogenated block of a poly(1,3-diene) or a copolymer comprising monomer units of a 1,3-diene and a vinylaromatic monomer, n being an integer equal to or greater than 1, the zirconium oxide particle content of the composite film being greater than 40% by mass of the composite film mass, the zirconium oxide particles having a median volume size, D50, greater than 100 nm and less than 1 µm. The membrane exhibits good plasticity.

The invention discloses a hydrophilic flow battery bipolar plate as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, preparing a bipolar plate base material from polyethylene, a conductive filler and a reaction aid; s2, the bipolar plate base material is subjected to a reaction in a first modified solution, a bipolar plate precursor is prepared, and the first modified solution comprises an initiator, an interface agent and a first solvent; and S3, carrying out a reaction on the bipolar plate precursor in a second modified solution to prepare the hydrophilic flow battery bipolar plate. The initiator and the interface agent are added into the first modified solution, the initiator is decomposed to generate free radicals, and the interface agent can make the free radicals more uniformly contact the surface of the polyethylene base material, so that subsequent introduction of hydrophilic groups is facilitated.

The application discloses an organic-inorganic composite modified concrete external curing agent and a preparation method thereof. The organic-inorganic composite modified concrete external curing agent is prepared by mixing 100-150 parts by weight of polyvinyl ether terpyridine modified styrene-acrylic emulsion, 8-16 parts by weight of sodium silicate nonahydrate, 15-30 parts by weight of polyethylene glycol, 1-1.5 parts by weight of a defoaming agent, 1-1.5 parts by weight of a leveling agent and 20-50 parts by weight of deionized water. The application is sprayed or coated on the surface of concrete, can quickly form a thin layer of dense film on the surface, has good environmental adaptability, can effectively work under various climate conditions, ensures that the internal moisture of concrete is retained, promotes the full hydration of cement, and thus improves the overall performance of concrete and prolongs the service life of concrete. Meanwhile, the cost effectiveness and environmental friendliness of the application are good, which is helpful to realize the sustainable development goal of concrete construction and maintenance.

The present invention provides: a resin composition with which it is possible to easily produce an insulated wire that has high communication characteristics; an insulated wire; a communication cable; a method for producing an insulated wire; and use of a resin composition. An insulated wire 2 comprises: a twisted wire conductor 21; and an insulator 22 that covers the outer periphery of the twisted wire conductor 21 so as not to form a gap between itself and the outer periphery. The insulator 22 is formed of a resin composition which contains, as a base polymer, a first resin composition that has a first crystallinity and a second resin composition that has a second crystallinity lower than the first crystallinity at a specific ratio, wherein: the first crystallinity is more than 40% and the second crystallinity is 40% or less; the first resin composition contains at least one resin that is selected from the group consisting of a polyethylene-based resin and a polypropylene-based resin; the second resin composition is a polyolefin-based resin; and the content of the second resin composition is 5 mass% to 50 mass% inclusive when the total of the first resin composition and the second resin composition is taken as 100 mass%. The resin composition may be used as an intermediate sheath of a communication cable.

The invention relates to the technical field of block copolymer materials, in particular to a preparation method of a polystyrene-vinylpyridine block copolymer composite membrane. The preparation method comprises the following steps: firstly, preparing a polyvinyl pyridine macromolecular chain transfer agent, then preparing a polystyrene-polyvinyl pyridine block copolymer, dissolving the synthesized polystyrene-polyvinyl pyridine block copolymer, spin-coating the surface of a microfiltration membrane with the dissolved polystyrene-polyvinyl pyridine block copolymer, and adjusting membrane-forming and pore-forming parameters, so that the block copolymer forms a continuous and uniform membrane layer on the surface of a base membrane; meanwhile, the interface is tightly combined with the base membrane. According to the method, high monomer conversion rate and narrow molecular weight distribution are achieved under the synergistic effect of the chain transfer agent and the free radical initiator, the polymerization activity is maintained by supplementing the initiator in different stages, and the polymerization efficiency is effectively improved.

The invention relates to a Polyethylene-based arrangement (8) with a thickness of less than 250 µm for the storage of grain, silage, warm or wet industrial products, comprising at least one outer layer (1), at least one inner layer (7) and only one barrier layer (5). The arrangement (8) comprises at least one PE based functional layer (3) to reduce the oxygen permeability of the polyethylene-based arrangement (8) to less than 50 cm3 / m2 d bar according to ASTM D3985.

A busbar covered with a cladding layer and a cladding method thereof. The busbar comprises a metal conductor base and a composite insulating layer formed on the surface of the metal conductor base by a reactive co-extrusion process; the composite insulating layer comprises a polyethylene-based adhesive inner layer in direct contact with the metal conductor base; the raw materials for preparing the polyethylene-based adhesive inner layer comprise, by weight fraction, PA12 75%-85%, antioxidant 0.1%-1%, anti-UV additive 0.1%-2%, color powder 0.5%-5%, and special additive 5%-20%. Through the synergy of material end group design and reactive co-extrusion process, a stable chemical bonding network is constructed in situ at the interface while continuously producing rapidly, which greatly improves the interlayer bonding force, heat aging resistance and long-term reliability of the cladding layer, and is particularly suitable for high-voltage battery systems of new energy vehicles with extremely high requirements for insulation and durability.

The invention relates to process for producing a nucleated polypropylene, comprising the steps of: (i) supplying a reaction stream comprising vinyl cycloalkane into a first reactor; (ii) polymerizing the vinyl cycloalkane in presence of a catalyst system to obtain a product stream, wherein the product stream comprises polyvinyl cycloalkane, unreacted vinyl cycloalkane, and the catalyst system; (iii) supplying the product stream into a second polymerization reactor containing propylene; and (iv) polymerizing the propylene in presence of the product stream and hydrogen to obtain the nucleated polypropylene; The mass ratio of the polyvinyl cycloalkane to the unreacted vinyl cycloalkane present in the product stream is ≤ 0.5. The invention further relates to the nucleated polypropylene obtained from the process and having suitable optical clarity and tensile strength.

The invention discloses a preparation method of a high-performance polyethylene gas pipe, and belongs to the field of polyethylene gas pipe manufacturing. A core-shell structure topological entanglement polymer directly grows on the surface of a polyvinyl base material particle through an in-situ interfacial polymerization technology, a flexible highly-branched core layer is responsible for stress dispersion, a shell layer with a reactive functional group is used for subsequent compatibilization, and then serial melting reactive extrusion is carried out, so that the core-shell structure topological entanglement polymer is obtained. The preparation method comprises the following steps: carrying out in-situ reaction on a main toughening agent POE-g-GMA and an active functional group generated after deprotection of a topological entanglement polymer to form a PE-entanglement agent-POE chemical compatibilization structure, and finally carrying out pipe extrusion molding and online microwave heat treatment to promote post-curing and chain segment rearrangement. According to the invention, the problems of interfacial compatibility and dispersity of a multiphase system are fundamentally solved, molecular-level compounding is realized, and the prepared gas pipe has ultrahigh toughness, excellent crack propagation resistance and good long-term durability.

The present disclosure pertains to recyclable multilayered polymeric structures comprising a number N of layers. Said recyclable multilayered polymeric structures comprise an outer surface layer N1, an inner surface layer N2, and optionally one or more layers between N1 and N2. Said recyclable multilayered polymeric structures comprise at least two different layers. The outer surface layer N1 is a barrier layer comprising a first polymer P1, P1 is polyethylene-based polymer with an ethylene content of at least about 50 mol% functionalized with polar groups and having an oxygen transmission rate (OTR) below 30 cc•20µm / m2•atm•day; a melting temperature above 160°C; a moisture resistance characterized by a water vapor transmission rate (WVTR) of less than 2 g•mm / m2•atm•day; and a density below 1.10 g / cm3. Said recyclable multilayered polymeric structures are for use in packaging applications, such as food packaging, building liners, geomembranes, pipes or containers for liquids.

The invention discloses an anti-aging polyvinyl dyed fiber and a preparation method thereof, belongs to the technical field of polyvinyl fiber processing, and is used for solving the technical problem that the mechanical strength and the anti-aging performance of the polyvinyl dyed fiber in the prior art need to be further improved. The invention relates to a PE-g-MAH (polyethylene-graft-maleic anhydride) anti-aging material, which specifically comprises the following components in parts by weight: 60-70 parts of a polyethylene copolymer, 10-15 parts of PE-g-MAH, 8-12 parts of an anti-aging filler, 1-2 parts of an azo coloring agent and 3-4 parts of an additive. The polyvinyl dyed fiber is prepared by constructing a copolymerization matrix containing functional group modified polyethylene, hyperbranched epoxy modified zinc oxide and a hindered amine composite anti-aging system and taking PE-g-MAH as a compatilizer, so that the mechanical strength of the polyvinyl dyed fiber is effectively improved, and the polyvinyl dyed fiber has excellent anti-aging performance under an ultraviolet aging condition. The excellent mechanical property and extremely low color difference can be kept, and good aging resistance is achieved.

The invention relates to an adhesive mass based on polyvinylaromatic compound-polydiene block copolymers, which comprises at least one type of cationically curable reactive resin, the improvement of the hot shear strength being achieved by the curing of the reactive resin. The invention further relates to an adhesive tape comprising at least one layer of this adhesive mass and to a method for its manufacture.

The invention discloses a preparation method of high-molecular-weight polyvinyl ether, and relates to the technical field of organic synthesis. Comprising the following steps: 1, adding vinyl ethyl ether into o-xylene, and adding alcohol and a catalyst to initiate polymerization; and 2, carrying out low-temperature polymerization, after the reaction is finished, adding deionized water, carrying out liquid separation and distillation, and adding o-xylene to adjust the solid content so as to form a solution, thereby obtaining the high-molecular-weight polyvinyl ether. Vinyl ethyl ether is dissolved in o-xylene, a catalyst is added at the temperature of 30-40 DEG C to initiate a polymerization reaction, polymerization continues at the temperature of-10-10 DEG C, and light yellow transparent viscous liquid, namely the high-molecular-weight polyvinyl ethyl ether, is obtained. The method is carried out in the solvent, the solvent does not need to be removed and recycled, the reaction route operation is simple, and the polymer molecular weight is controllable. The method has the advantages of no by-product and high yield.

The purpose of the present invention is to provide a laminate that can maintain an adhesive strength resistant to easy peeling from a molding during use, that at the same time enables the affixed laminate to be separated from a molding during recycling, and that is resistant to blistering.　The present invention relates to a laminate comprising a porous resin layer and an uneven layer provided on one of the main surfaces of the porous resin layer, wherein the porous resin layer contains a filler; the content of this filler is 40 mass% to 70 mass%; the uneven layer contains a thermoplastic resin; the thermoplastic resin in the uneven layer contains a polyethylene-based resin (A) having a melting point of 80 to 140°C; and the content of the polyethylene-based resin (A) in the thermoplastic resin is at least 40 mass%.

Hermetically sealed single-lip pouch, comprising: a front wall, a rear wall, a first side wall, a second side wall, a top seal, a first side seal, a second side seal and a bottom seal, wherein the first side seal comprises an upper section connecting the front wall to the rear wall, a front leg section connecting the front wall to the first side wall, and a rear leg section connecting the rear wall to the first side wall, and the second side seal comprises an upper section connecting the front wall to the rear wall, a front leg section connecting the front wall to the second side wall, and a rear leg section connecting the rear wall to the second side wall, and wherein each of the front wall, the back wall, the first side wall and the second side wall is constructed from a recyclable packaging film with strong barrier properties, comprising a machine-direction oriented polyethylene-based outer film and a polyethylene-based inner film, wherein the polyethylene-based outer film has a secant modulus in the transverse direction and a secant modulus in the machine direction, each between 1,000 and 1,800 N / mm² 2 amount to, and wherein the recyclable packaging film with strong barrier properties comprises an ethylene vinyl alcohol copolymer not exceeding 5% by weight.

An immersion motor (12) according to an embodiment comprises a stator (33) and a rotor (32). The stator and the rotor are each coated with a polyethylene-based heat-fusible material. An immersion pump (10) comprises the immersion motor having a motor shaft (31) to which the rotor is fixed, and the immersion pump comprises a pump shaft (21) connected to the motor shaft, and a pump body (22) formed integrally with the pump shaft. Accordingly, the immersion pump can operate with high efficiency in a state in which the stator and the rotor are directly immersed in anhydrous ammonia.

The invention discloses an acid-base response type organic room-temperature phosphorescent material based on a B-N bond and a preparation method and application thereof. The acid-base response type organic room-temperature phosphorescent material comprises a host matrix and guest molecules doped in the host matrix, the main matrix is poly (4-vinylpyridine); the guest molecule is an aromatic compound with a boric acid ester group; a dynamic B-N coordination bond is formed between boron atoms in the guest molecule and nitrogen atoms of a pyridine group in the host matrix, and the reversible phosphorescence response to an acidic atmosphere and / or an alkaline atmosphere is realized by the acid-base response type organic room temperature phosphorescence material based on the B-N bond through the formation and fracture of the dynamic B-N coordination bond. The B-N bond can also anchor molecules to inhibit non-radiative transition, promote spin-orbit coupling and induce efficient room-temperature phosphorescence. According to the invention, blue-to-red full-color gamut luminescence is realized by adjusting the structure and the concentration of the object, and the blue-to-red full-color gamut luminescent material has super-long service life and high-sensitivity reversible switching The preparation process is simple and environment-friendly, and has wide application prospects in the fields of information encryption, anti-counterfeiting and detection.

The invention relates to a recyclable multilayer liner (1) for use in containers for transporting liquids, comprising an outer polyethylene-based layer (2), an inner polyethylene based layer (8), a barrier layer (5) centrally located, serving as a gas barrier and two protective layers (4, 6) wherein at least two layers (3, 4, 6, 7) are symmetrically sandwiching the barrier layer (5), wherein the protective layers (4, 6) are configured to protect the barrier layer (5) mechanically and prevent it from swelling in the presence of moisture, maintaining its gas barrier properties. The protective layers (4, 6) are (PE) polyethylene based.

The present invention relates to a polyethylene composition with improved rheological properties, while maintaining thermal properties and mechanical properties, the polyethylene composition having a MFR5 (5.0 kg, 190 °C, ISO 1133) of 0.1 to 4.0 g / 10min, and a viscosity at a constant shear stress of 747 Pa, eta747, of equal to or more than 130 kPa•s, said polyethylene composition being obtainable or obtained by a process comprising the steps of a) providing a polyethylene base resin (A) having a MFR5 (5.0 kg, 190 °C, ISO 1133) of 0.1 to 3.0 g / 10min and optionally comprising a content of one or more C3 to C12 alpha-olefin co-monomer(s) of from 1 to 10 wt.-%, based on the total weight of the polyethylene base resin (A), preferably further melting the polyethylene base resin (A) in an extruder, b) mixing said polyethylene base resin (A) in an amount of from 73.5 to 99.99 wt.-% with a radical initiator (B), selected from the group consisting of the peroxy compounds according to formulae (I) to (III), in an amount of from 0.01 to 1.5 wt.-%, based on the total weight of a resulting mixture, and any mixtures thereof, preferably melt mixing said polyethylene base resin (A) with the radical initiator (B) in a melt mixing device, such as an extruder; and c) reacting said polyethylene base resin (A) and the radical initiator (B) at a temperature within the range of from 150 to 300 °C, thereby obtaining the polyethylene composition. The present invention further relates to a process for producing the polyethylene composition, to articles comprising the polyethylene composition, and to the use of the polyethylene composition for making an article, preferably a pipe or a supplementary pipe article.

The present application relates to the technical field of flame-retardant cable, in particular to a kind of armored flame-retardant power cable, including conductor, modified insulation layer, inner liner and armored layer, the modified insulation layer is wrapped in conductor outside, the inner liner is wrapped in modified insulation layer outside, the armored layer is wrapped in inner liner outside.The present application is modified to polyphosphoric ammonium, melamine formaldehyde prepolymer in steps, solve the problem that traditional flame-retardant additive is poor with polyethylene base material Compatibility, easy to agglomerate, modified polyphosphoric ammonium effectively reduces the van der waals force between flame retardant particles, avoids the local agglomeration phenomenon that traditional polyphosphoric ammonium directly added easily occurs, while modified melamine formaldehyde prepolymer plays steric hindrance effect to polyphosphoric ammonium particles, so that it is mixed and fused in the process of insulation base material, let flame retardant realize global uniform distribution in insulating layer, no dispersion dead angle.

A polyethylene-based composition may include an ethylene-based copolymer produced from ethylene and one or more C3-C10 alpha olefin comonomers, wherein the ethylene-based copolymer has: a density ranging from 945 kg / m3 to 961 kg / m3 according to ASTM D792, a melt flow rate (MFR2) ranging from 0.5 g / 10 min to 3.0 g / 10 min according to ASTM D1238 at 190° C. / 2.16 kg, a molecular weight distribution (Mw / Mn) ranging from 3 to 25, and a stress exponent (SEx) ranging from 1.0 to 1.8.