105 results about "Ethylene propylene copolymer" patented technology

Disclosed are a high-strength high-elongation separator and a preparation method therefor. The high-strength high-elongation separator comprises ultra-high molecular weight polyolefin and a solubilizer, wherein the solubilizer is one of or a mixture of more of an ethylene-propylene copolymer, an ethylene-butylene copolymer and an ethylene-octene copolymer. The preparation method therefor comprises: mixing ultra-high molecular weight polyolefin, a solubilizer and a pore-forming agent, and stirring same until uniform, so as to obtain a premixed raw material; injecting the premixed raw material into an extruder, heating same to obtain a thermodynamic single-phase melt, and subjecting the thermodynamic single-phase melt to melt casting onto a cooling roller, so as to obtain a crystallized cast sheet; and subjecting the crystallized cast sheet to primary stretching and cooling to obtain a primary stretched film, subjecting the primary stretched film to secondary stretching to obtain a secondary stretched film, performing extraction and washing, and then drying same, so as to obtain a high-strength high-elongation separator. The preparation method utilizes the solubilizing effect of a copolymer and multiple operations of stretching performed in steps, and therefore the separator has good ductility and tensile strength.

The invention relates to the field of high polymer materials, and particularly discloses a high-temperature-resistant and aging-resistant polypropylene insulating material and a preparation method thereof.The polypropylene insulating material is prepared from 70-90 parts of polypropylene, 15-25 parts of ethylene-propylene copolymer, 5-8 parts of nanometer functional filler, 0.5-2 parts of antioxidant, 1-3 parts of stabilizer and the like. The nano functional filler is prepared by wrapping core nano zinc oxide with a boron nitride-based composite shell layer. The polypropylene insulating material prepared in the invention has good high temperature resistance and aging resistance.

The invention belongs to the technical field of high polymer materials, and particularly relates to a polyolefin composite material as well as a preparation method and application thereof. The polyolefin composite material is prepared from the following raw materials: polyethylene, a polyolefin toughening agent, a compound flame retardant and a filler, the melt index of the polyethylene at 190 DEG C / 2.16 kg is greater than or equal to 18 g / 10 min, and the bending modulus is less than or equal to 160 MPa; the polyolefin toughening agent is selected from at least one of an ethylene-propylene copolymer, an ethylene-butylene copolymer and an ethylene-vinyl acetate copolymer, and the melt index at 230 DEG C / 2.16 kg is greater than or equal to 9 g / 10 min; the compound flame retardant comprises tetrabromobisphenol S bis (2, 3-dibromopropyl) ether, antimony trioxide and hydroquinone bis (diphenyl phosphate), and the filler is at least one of talcum powder, barium sulfate and wollastonite. Through specific types of polyethylene, the polyolefin flexibilizer, the compound flame retardant and the filler, excellent flame retardance and toughness can be obtained.

The invention relates to the technical field of polymer composite materials, in particular to a corrosion-resistant composite material for a pin insulator wire fixing device and a preparation method of the corrosion-resistant composite material. 5-10 parts of an ethylene-propylene copolymer elastomer; 2 to 4 parts of maleic anhydride grafted polypropylene; 0.5 to 1 part of polyethylene glycol; 3-5 parts of nano silicon dioxide subjected to surface silanization treatment; 5-10 parts of surface modified mica sheets; 0.5 to 2 parts of fluorinated graphene; 0.2 to 0.5 part of a hindered amine light stabilizer; 0.2 to 0.5 part of a hindered phenol antioxidant; 0.2 to 0.4 part of a benzotriazole ultraviolet light absorber; 0.3 to 0.6 part of metal stearate; the corrosion-resistant coating has the advantages that the corrosion medium permeation is effectively blocked, and the corrosion-resistant coating has excellent corrosion resistance under the corrosion medium in acidic, alkaline and salt mist environments.

The invention discloses a polypropylene insulated cable and a processing method thereof, and belongs to the technical field of insulated cables. The cable sequentially comprises a conductor, an insulating layer and a sheath layer from inside to outside. Wherein the insulating layer is prepared from the following raw materials in parts by weight: 70 to 80 parts of polypropylene resin, 10 to 20 parts of functional additive, 3 to 5 parts of chopped glass fiber, 0.6 to 1.0 part of lubricant and 0.1 to 0.3 part of initiator, and the sheath layer is additionally provided with superfine aluminum oxide and ethylene-propylene copolymer. Wherein the functional additive improves the flame retardance and thermal stability of the cable. The insulating layer and the sheath layer of the cable are kept consistent on the main body material, so that the overall interface bonding force and the structural consistency of the cable are improved, and meanwhile, the raw material purchasing and production process flow is simplified; in conclusion, the cable prepared by the invention simultaneously solves the problems of poor flame retardance and easy thermal aging of a polypropylene cable, and can be widely applied to the technical field of insulated cables with high performance requirements.

The present disclosure relates to a multilayer film, which successively has: a first outer layer containing a propylene homopolymer (A) and a propylene-ethylene random copolymer (B) as a heat-seal layer; an inner layer containing a propylene-ethylene block copolymer (C) and an ethylene-propylene copolymer elastomer (D); and a second outer layer containing the propylene homopolymer (A) and the propylene-ethylene random copolymer (B), wherein at least any one of the first outer layer, the inner layer, and the second outer layer further contains a polyphenol compound.

The invention relates to a polypropylene material as well as a preparation method and application thereof. The polypropylene material comprises the following components: co-polypropylene, the co-polypropylene comprises a continuous phase formed by a homo-polypropylene chain segment and a rubber phase formed by an ethylene-propylene copolymer chain segment; the isotacticity of the homo-polypropylene chain segment is 98 to 99 percent; the mass percentage content of the rubber phase in the co-polypropylene is 10-15%; the mass percentage content of the ethylene unit in the rubber phase is 20-40%; the melt index of the polypropylene material is 60 to 100g / 10min. Through component design, the polypropylene material provided by the invention has the characteristics of high melt index, high modulus and high impact resistance, and can meet the application requirements of large thin-wall workpieces.

The invention belongs to the technical field of PTFE (polytetrafluoroethylene) coating materials, and particularly relates to a polytetrafluoroethylene resin material as well as a preparation method and application thereof. The polytetrafluoroethylene resin material provided by the invention comprises the following preparation raw materials in parts by mass: 90-100 parts of polytetrafluoroethylene, 1-10 parts of an organic additive and 15-25 parts of a lubricant, the organic additive comprises a perfluoroalkoxy resin and / or a fluorinated ethylene propylene copolymer. The obtained polytetrafluoroethylene resin material is better in flexibility, the produced E + PTFE coating pad can be softer, the sealing performance and the pressure bearing capacity are improved, and the problems that a PTFE coating membrane is high in hardness and poor in flexibility are solved; and meanwhile, the polytetrafluoroethylene resin material provided by the invention is transparent in character, and even if bubbles are generated in the E + PTFE coating pad during preparation, the bubbles can be found in time, so that the product quality is ensured.

The application discloses a high-strength high-ductility diaphragm and a preparation method thereof. The high-strength high-ductility diaphragm comprises ultrahigh molecular weight polyolefin and a solubilizing agent, wherein the solubilizing agent is a mixture of one or more of ethylene-propylene copolymer, ethylene-butene copolymer and ethylene-octene copolymer. The preparation method comprises the following steps: mixing the ultrahigh molecular weight polyolefin, the solubilizing agent and a pore-forming agent, stirring until uniform to obtain premixed raw materials; injecting the premixed raw materials into an extruder, heating to obtain a thermodynamic single-phase melt, and melt casting the thermodynamic single-phase melt onto a cooling roller to obtain a crystalline casting sheet; once stretching the crystalline casting sheet, cooling to obtain a once-stretched film, twice stretching the once-stretched film to obtain a twice-stretched film, washing, drying to obtain the high-strength high-ductility diaphragm. The preparation method utilizes the solubilizing effect of the copolymer and multiple step-by-step stretching, so that the diaphragm has excellent ductility and tensile strength.

The invention provides a multi-layer composite fiber sheet and a preparation method and application thereof, and belongs to the technical field of high polymer materials.The multi-layer composite fiber sheet is characterized in that at least one ethylene-propylene copolymer fiber layer (B) is added between at least two high-density polyethylene fiber layers (A) to form an A-B-A sandwich structure; a plurality of bonding points exist between the ethylene-propylene copolymer and the high-density polyethylene, bonding and curing are achieved, the self heat melting phenomenon cannot occur, and the mechanical property, the heat resistance, the air permeability, the opacity and the layering strength of the multi-layer composite fiber sheet are improved.

A lubricating oil composition contains 0.1 to 3.0% by mass of an ethylene-propylene copolymer having a weight average molecular weight of 5000 to 20000, and it is a lubricating oil composition for a helical gear mechanism.

The invention provides a high-temperature-resistant packaging bag film and a preparation method and application thereof, and belongs to the technical field of packaging. The high-temperature-resistant packaging bag film comprises an inner layer and an outer layer, and the inner layer is prepared from ternary co-polypropylene, ethylene-propylene copolymer and smooth opening master batch; the core layer comprises at least three first sub-layers made of block co-polypropylene and at least two second sub-layers made of heat-resistant homo-polypropylene, and the first sub-layers and the second sub-layers are stacked in an alternating mode; and the outer layer is prepared from heat-resistant homo-polypropylene and smooth open master batch. According to the high-temperature-resistant packaging bag film with the structural design, the mechanical property, the heat sealing performance and the processing adaptability are remarkably improved, the heat sealing temperature is low, the heat sealing strength is high, a firm and reliable seal can be formed, knife sticking is avoided in the bag making and hot cutting process, and the excellent impact resistance is achieved.

The present invention provides a vapor phase rust-proof cold stretch protective film, which comprises an inner layer, a middle layer and an outer layer from the inside out; the outer layer, by weight, comprises 70-80 parts of metallocene linear polyethylene, 20-30 parts of linear polyethylene and 1-4 parts of processing aid masterbatch as raw materials; the middle layer, by weight, comprises 5-30 parts of ethylene propylene copolymer and 70-95 parts of metallocene linear polyethylene as raw materials; the inner layer, by weight, comprises 60-80 parts of metallocene linear polyethylene, 20-30 parts of linear polyethylene, 2-10 parts of vapor phase rust-proof masterbatch and 1-4 parts of processing aid masterbatch as raw materials. The protective film of the present invention has excellent tensile strength and tear resistance, small permanent deformation, good flexure and resilience, and the cold stretch protective film produced using the material has excellent clamping force and weather resistance, high packaging efficiency during use, is not easily damaged, and can better improve production efficiency; when used as a protective film in the field of ferrous metal products, it has an excellent and long-lasting rust-proof effect.

A carbon fiber particle and a manufacturing method thereof are disclosed. The carbon fiber particle includes a plurality of reinforcing fibers and a resin material. The reinforcing fibers include a plurality of carbon fibers and a sizing agent composition. The sizing agent composition includes a sizing agent of an acrylate graft-modified polyurethane resin. The acrylate graft-modified polyurethane resin is graft-modified with a plurality of modifying monomers, and the modifying monomers are at least one selected from the group consisting of an alkyl-containing (meth)acrylate, a hydroxyl-containing (meth)acrylate, and a carboxyl-containing vinyl monomer. The resin material includes a polypropylene resin and a modified ethylene propylene copolymer. The modified ethylene propylene copolymer is a maleic anhydride-modified ethylene propylene copolymer. The weight ratio between the plurality of reinforcing fibers and the resin material is between 1:9 and 11:9. Thus, the adhesion between the plurality of reinforcing fibers and the resin material can be improved, so that the carbon fiber particle can have better mechanical properties.

The invention discloses a high-temperature-resistant solid tire tread material and application thereof, and relates to the technical field of nano modified materials. The material is composed of matrix resin, a reinforcing filler, a regenerated material and a composite cross-linking agent, wherein the matrix resin adopts an ethylene-propylene copolymer and maleic anhydride grafted ethylene-propylene copolymer composite system, and the grafting rate is 5-15 wt%; the reinforcing filler is iron-doped porous nano aluminum oxide; the regenerated material is polyester fiber recovered from waste tires; and the cross-linking system is prepared by carrying out plasma treatment on dicumyl peroxide and m-phenylenediamine bismaleimide. A gradient structure with the surface layer grafting rate of 15% and the core layer grafting rate of 5% is formed through a gradient pressing technology, and cross-linked network optimization is achieved in combination with a dynamic vulcanization technology. The material is particularly suitable for high-temperature heavy-load scenes such as harbor machinery and mining equipment, and the service life is prolonged by 2-3 times. Through the nano-porous structure design, gradient interface regulation and control and regeneration material cooperation, the high performance and environmental protection characteristics are achieved.

The present invention relates to a blown film comprising a polypropylene composition comprising an ethylene-propylene copolymer and a polyethylene-polyethylene glycol block copolymer.

This invention discloses an inorganic-reinforced ethylene-propylene copolymer material and its preparation method, relating to the field of ethylene-propylene copolymer technology. The material, by mass parts, comprises: 30-70 parts ethylene-propylene copolymer, 10-20 parts modified starch, 10-30 parts ethylene-styrene copolymer, 5-12 parts maleic anhydride-grafted polyethylene, 1-10 parts montmorillonite, 1-10 parts magnesium oxide, and 0.01-1.0 parts initiator. The modified starch is obtained by oxidizing starch and then using (S)-1,2-epoxy-5-hexene as an etherification modifier. This invention introduces modified starch containing double bonds, giving the material a certain degree of biodegradability; utilizes ethylene-styrene copolymer and maleic anhydride-grafted polyethylene to improve heat resistance and starch dispersibility; and modifies montmorillonite and magnesium oxide with a coupling agent to form a cross-linked network with the matrix, producing a significant reinforcing synergistic effect. The resulting material possesses good thermal stability, rigidity, processing performance, and partial biodegradability, making it suitable for applications such as hot melt adhesives.

The present application relates to a kind of four-layer co-extrusion infusion film and its preparation process, using four-layer structure, film is composed of A layer, B layer, C layer and D layer. Wherein, A layer is the outer layer of product, thickness is 15-25 μm, is composed of polypropylene and styrene-ethylene-butadiene hydrogen block copolymer. B layer is the secondary outer layer of product, thickness is 10-15 μm, is composed of modified linear low density polyethylene. C layer is the intermediate layer of product, thickness is 130-160 μm, is composed of modified polyethylene. D layer is the inner layer of product, thickness is 10-30 μm, is composed of ethylene-propylene copolymer and styrene-ethylene-butadiene hydrogen block copolymer. The present application adopts four-layer co-extrusion down blowing process, and prepares the packaging suitable for various infusion. The present application not only guarantees the light transmittance, low temperature heat sealing property, heat sealing strength, printability, resistance to 121 ℃ cooking and other properties of film. Film material is compatible with the softness of traditional five-layer co-extrusion infusion film and the high strength characteristics of three-layer co-extrusion infusion film.

A tie layer composition with improved bonding in polypropylene multi-layer structures, and improved bonding in general under retort conditions is disclosed. The tie layer composition comprises two components, an ethylene-propylene copolymer and a maleic anhydride-grafted copolymer of ethylene and an a-olefin, preferably 1 -hexene, and is prepared by compounding the two components. Tie layers that comprise the novel composition and multi-layer films and sheets that incorporate tie layers made from the novel composition are also disclosed.

The invention relates to a dielectric fluid erosion-resistant server power supply module shockproof packaging structure and method, and the structure comprises an epoxy resin pouring sealant structure and / or a silica gel base fluid structure which are / is sequentially arranged in a server power supply module housing. The perfluoropolyether (PFPE) structure and / or the fluorinated ethylene propylene copolymer (FEP) structure are / is formed on the surface of the epoxy resin pouring sealant and / or the silica gel base liquid after the epoxy resin pouring sealant and / or the silica gel base liquid are / is cured. The packaging method comprises the following steps: filling the first base solution with epoxy resin pouring sealant and / or silica gel at the temperature of 10-15 DEG C and the pressure of 5-10 bar, uniformly mixing the first base solution with aluminum nitride (AlN) or aluminum oxide (Al2O3) nanoparticles subjected to surface modification by a fluorosilane coupling agent, and injecting the mixture into a power supply shell provided with a precise element; through a traditional double-layer structure design of epoxy resin, silica gel and perfluoropolyether (PFPE) and / or fluorinated ethylene propylene copolymer (FEP), and doping of the nanoparticles, a packaging composite scheme with corrosion resistance, shock resistance and excellent heat dissipation is formed.

The present invention relates to a polyolefin composition comprising, based on the weight of the polyolefin composition, A) 60-80% by weight of an ethylene-vinyl acetate copolymer, B) 10-20% by weight of an ethylene-propylene copolymer, and C) 10-20% by weight of an additive. The invention also relates to an article made from the polyolefin composition.

A lubricating oil viscosity index improver (V.I.I.) additive comprising an ethylene-propylene copolymer, said additive having the following features:-a shear stability index (SSI) of from 18% to 30%, preferably from 20% to 28%, measured in a Group I base oil according to the ASTM D7109-12 standard (30 shear cycles); -a thickening capacity (TP) in the range of from 3 cSt to 8 cSt, preferably from 4 cSt to 7.5 cSt, as measured in Group I base oils according to the ASTM D7042-04 standard,-a thickening capacity (TP) in the range of from 3 cSt to 8 cSt, preferably from 4 cSt to 7.5 cSt; -a gel index defined by the following ratio: ([eta] 0 DEG C / [eta] 40 DEG C) / ([eta] 60 DEG C / [eta] 40 DEG C) wherein [eta] represents the steady-state dynamic viscosity measured in the Group III base oil, said gel index being less than or equal to 7000, preferably from 30 to 6000, more preferably from 50 to 5000; -the initial gelation temperature is a temperature lower than or equal to 10 DEG C, preferably from 0 DEG C to 10 DEG C, measured in the Group III base oil; -a shape stability defined according to the following formula: [Delta] L% = [(L / L0)-1)] * 100 less than or equal to 5%, preferably less than or equal to 4%, more preferably less than or equal to 3%, where L is the length after 24 hours and L0 is the initial length equal to 10 cm. The lubricating oil viscosity index improver (V.I.I.) additive can be advantageously used in base oils of mineral sources, synthetic sources, or mixtures thereof. Preferably, the mineral-derived or synthetic-derived base oil is selected from the group consisting of base oils belonging to class I, class II or class III.

A multilayer film including at least one abuse layer. The abuse layer is a blend of one or more polyamides and an acid anhydride-grafted or maleic anhydride-grafted elastomer. The acid anhydride or maleic anhydride-grafted elastomer includes ethylene propylene diene monomer rubber, ethylene propylene copolymer, styrene-ethylene-butene-styrene, ethylene / octene copolymer, and blends thereof. Also disclosed are pouches made from the multilayer film and a method of packaging food with the multilayer film.

A resin composition according to the present invention contains a cellulose-based material (A), polyvinyl acetate (B), and at least one thermoplastic resin (C) selected from the group consisting of polyethylene, polypropylene, and ethylene-propylene copolymers.

The invention discloses a TPO material with high weather resistance and a preparation method thereof. The TPO material is prepared by chemically synthesizing a monomer with double functional groups of ultraviolet absorption and free radical capture, grafting the monomer to an ethylene-propylene copolymer skeleton to form a PO-g-(BTZ-HALS) auxiliary agent, and carrying out melt blending on the PO-g-(BTZ-HALS) auxiliary agent, a TPO base material, carbon black masterbatch and the like. According to the invention, a weather-resistant functional group is anchored in a polymer chain in a chemical grafting manner, so that the defects of easy migration, easy volatilization and poor compatibility of a traditional small-molecule auxiliary agent are effectively overcome. The tensile strength retention rate of the obtained TPO material is greater than or equal to 91% and the chromatic aberration delta E is less than or equal to 1.7 after the TPO material is aged by a xenon lamp for After the QUV composite aging for 1500h, the gloss retention rate is greater than or equal to 84.8%, the surface cracks are extremely few, and the yellowing index delta YI is less than or equal to 2.3. The material disclosed by the invention has excellent long-term weather resistance, color stability and surface integrity.

To provide a dicing tape base film made of a polyolefin resin that has no yield point during expansion and exhibits excellent uniform expansion.SOLUTION: A dicing tape base film includes a release layer, a base layer, and a dicing layer in this order, and the release layer is primarily composed of an ethylene-propylene copolymer, the base layer contains a 1-butene polymer, a thermoplastic elastomer, and mineral oil, and the dicing layer contains at least one of an ethylene-propylene copolymer and an olefin-based thermoplastic elastomer.SELECTED DRAWING: None

A process for the preparation of a polypropylene composition comprising a heterophasic propylene copolymerwherein the heterophasic propylene copolymer consists of:a propylene homopolymer matrix in an amount from 71 to 92 wt %, based on the heterophasic propylene copolymer andan ethylene-propylene copolymer in an amount from 8 to 29 wt %, based on the heterophasic propylene copolymer,wherein the amount of units derived from ethylene based on the ethylene-propylene copolymer is between 40 to 60 wt %, andwherein the polypropylene composition hasa melt flow rate from 0.5 to 120 dg / min as determined according to ISO1133:2011 using 2.16 kg at 230° C.,wherein the heterophasic propylene copolymer is produced in a sequential multi-reactor polymerization process in the presence of a catalyst in a gas phase to obtain the heterophasic propylene copolymer, wherein said catalyst comprises a procatalyst, a co-catalyst and optionally an external electron donor.

A polypropylene-based resin composition comprising: a polypropylene-based resin (A) that includes a block polypropylene (A-1) composed of a continuous phase comprising a propylene polymer (A-1a) and a rubber phase comprising a copolymer (A-1b) of ethylene and propylene; an ethylene / α-olefin polymer (B) that is a polymer of ethylene and a C4-10 α-olefin; an inorganic filler (C); and, optionally, a stearate (D), wherein the block polypropylene (A-1) is configured such that the intrinsic viscosity of the xylene-soluble fraction in tetrahydronaphthalene at 135°C is less than 4 dl / g, and the ethylene-derived unit content in the copolymer (A-1b) is 20-40 mass% based on the total mass of the copolymer (A-1b).

Blown film of a polypropylene composition comprising an ethylene-propylene copolymer and polyethylene glycol.