701 results about "Ethylene propylene copolymer" patented technology

The present invention relates to oriented or hot-blown shrink films which may be manufactured from by a number of processes. The oriented films may be manufactured by double bubble, LISIM, tape bubble, trapped bubble or tenter framing processes. The films of the present invention are useful as a shrink film to package and label a variety of products. The films exhibit a high degree of MD shrinkage in a very controlled and consistent manner while providing a number of other positive characteristics such as optical clarity, puncture and abrasion resistance, controlled gauge, and superior web winding and handling characteristics. The shrink control layers of the films of the present invention contain a modifier component selected from plastomers and/or metallocene catalyzed ethylene-propylene copolymers and blends thereof.

This invention discloses a micro-porous membrane of POLYALLYLALCOHOL/TiO2 for lithium-ion battery and its manufacturing method, which uses multilayer materials, formed by overlapping of a layer of polyethylene, PP and others, and improved heat-induced phase separation process to make the overall structure of polyolefin multilayer micro-porous membrane. In the neighboring layers of polyethylene and polypropylene, at least one layer contains a certain amount of ethylene-propylene copolymer to improve their compatibility. Its advantages are: 1) this structure realizes lower shutting hole and higher breaking film temperature without affecting other performance, to enhance the temperature and safety of the membrane. 2) The membrane is not easy to curl with high resistance and high mechanical strength to external injury, increasing the reliability of processing and use. 3) The simple manufacturing process can be realized only on the basis of the general heat-induced phase separation.

There are disclosed a carbon fiber strand for reinforcement of thermoplastic resin, wherein a sizing agent containing a resin composition obtained by mixing a component [A], i.e. an acid-modified polyolefin copolymer having a weight-average molecular weight of 15,000 to 150,000, which has, as the main chain, an ethylene-propylene copolymer, a propylene-butene copolymer or an ethylene-propylene-butene copolymer and in which the main chain has been modified with 0.1 to 20% by mass of an unsaturated carboxylic acid, and a component [B], i.e. an acid-modified polypropylene having a weight-average molecular weight of 3,000 to 150,000, which has, as the main chain, a polypropylene and in which the main chain has been modified with 0.1 to 20% by mass of an unsaturated carboxylic acid, at a mass ratio of 1:20 to 10:5, is adhered to 100 parts by mass of a carbon fiber in an amount of 0.1 to 8.0 parts by mass; a method for producing the above strand; and a carbon fiber-reinforced thermoplastic resin containing the above strand.

A laminate film including a first polyolefin layer comprising of a blend of 50-95% ethylene-propylene copolymer and 50-5% ethylene polar terpolymer with a polar polymer layer on one side of said first polyolefin resin-containing layer is disclosed. The laminate film could further have additional layers such as a second polyolefin resin-containing layer, a metal layer, or combinations thereof.

A thermally-conductive interface interposable intermediate a first heat transfer surface and an opposing second heat transfer surface to provide a thermal pathway therebetween. The interface includes a thermally-conductive compound formed into a layer which is conformable between the first and second heat transfer surface. The compound is an admixture of: (a) a liquid resin constituent; and (b) a particulate filler constituent. The liquid resin constituent may be an ethylene-propylene copolymer (EPM) or a terpolymer (EPDM) of ethylene and propylene and a diene which may be ethylidene norbornene (ENB) or dicyclopentadiene (DCPD).

The invention relates to engine oil suitable for multiple fuels, and belongs to the field of engine oil for an automobile. The engine oil comprises the following raw materials in mass portion: 33 to 36 portions of base oil 150SN, 22 to 24 portions of base oil VHVI H350 (type III), 15 to 17 portions of poly alpha-alkene, 2 to 4 portions of ester oil of C8 to C10, 11 to 13 portions of ethylene-propylene copolymer the molecular weight of which is between 63,000 and 108,000 as viscosity index improver, 0.4 to 1.2 portions of zinc dialkyl dithiophosphate as additive for resisting oxidation and corrosion as well as abrasion, 1.1 to 4.8 portions of alkyl phenol calcium and 1.9 to 2.5 portions of calcium sulfonate as detergent, 3.8 to 5.0 portions of polyisobutene succimide as dispersant, and 0.001 to 0.003 portion of methyl silicone oil as antifoaming agent. The engine oil meets performance requirements of automobile and engine manufacturers at home and abroad on gasoline engine oil and sedan diesel engine oil.

The present invention is to provide a composite carrier, which is spheric particles obtainable by contacting magnesium halide with one or more electron donor compounds to form a solution, then mixing the solution with silica material having an average particle size of less than 10 microns to form a mixture, and drying the mixture through spray drying process. The present invention is also to provide a catalyst component comprising said composite carrier. When the catalyst component is used together with a cocatalyst component in propylene polymerization, it exhibits higher polymerization activity and stereospecificity, and can be used to prepare high impact resistant ethylene-propylene copolymer having high ethylene content.

The invention relates to a catalyst for catalytic cracking and mainly solves the problems of high service temperature and low yield of ethylene-propylene copolymer in the prior catalyst for catalytic cracking in ethylene-propylene copolymer synthesis. In order to solve the problems, the technical scheme is as follows: the catalyst is obtained by loading at least one element of the group IB or the group IIB in the periodic table of elements on a ZSM-5/mordenite molecular sieve, ZSM-5/beta-zeolite molecular sieve or ZSM-5/Y-zeolite molecular sieve. The catalyst is applied to the industrial production of ethylene-propylene copolymer via catalytic cracking of petroleum naphtha.

A rubber mixture, comprising (A) at least one rubber selected from the group of ethylene-propylene-diene copolymer (EPDM), ethylene-propylene copolymer (EPM), chloroprene rubber (CR), chloropolyethylene (CM), chloro-isobutene-isoprene (chlorobutyl) rubber (CIIR), chlorosulfonyl polyethylene (CSM), etylene-vinyl acetate copolymer (EAM), alkyl acrylate copolymer (ACM), polyester polyurethan (AU), polyether polyurethane (EU), bromo-isobutene-isoprene (bromobutyl)rubber (BIIR), polychlorotrifluoroethylene (CFM), isobutene-isoprene rubber (butyl rubber, IIR), isobutene rubber (IM), polyisoprene (IR), thermoplastic polyester polyurethane (YAU), thermoplastic polyether polyurethane (YEU), silicone rubber with methyl groups on the polymer chain (MQ), hydrogenated acrylonitrile-butadiene rubber (HNBR), acrylonitrile-butadiene rubber (NBR) or carboxylated acrylonitrile-butadiene rubber (XNBR), (B) at least one oxidic filler, and (C) at least one silicon containing azodicarbamide of the general formula I (R 1 ) 3-a (R 2 ) a Si-R I -NH-C(O) -N=N-C (O)-NH-R I -Si(R 1 ) 3-a (R 2 ) a (I) . The rubber mixture is produced by mixing at least one rubber, at least one oxidic filler, and at least one silicon containing azodicarbamide of the general formula I. It may be used for moldings.

A cross-linkable polyolefin composition (polyethylene, polypropylene or an ethylene-propylene copolymer) is coextruded with ultrahigh molecular weight polyethylene to form two-layer separator membranes, or three-layer separator membranes, for lithium-ion battery cells. In three-layer separator membranes, the cross-linkable polyolefin is formed as the outer faces of the separator for placement against facing surfaces of cell electrodes. The polymer materials initially contain plasticizer oil, which is removed from the extruded membranes, and the extruded membranes are also stretched to obtain a suitable open pore structure in the layered membranes to provide for suitable infiltration with a liquid electrolyte. The cross-linked polyolefin layer provides strength at elevated temperatures and the lower-melting, ultrahigh molecular weight polyethylene layer provides the separator membrane with a thermal shutdown capability.

The invention discloses a deepwater constant-rheology oil base drilling fluid applicable for deep sea drilling. The deepwater constant-rheology oil base drilling fluid applicable for deep sea drilling comprises the following components in parts by weight: 70-100 parts of white oil, 0-30 parts of a calcium chloride aqueous solution, 1.5-5 parts of a fluid type conditioning agent, 1-4 parts of an emulsifying agent, 0.5-2.5 parts of a wetting agent, 1-3.5 parts of organic soil used for drilling fluid, 1.5-5 parts of a filtrate reducer, 0.2-0.6 parts of calcium oxide and 0-260 parts of a weighting agent. The fluid type conditioning agent is at least one of ethylene-propylene copolymer, polymethacrylate, trimeric acid, phenolic resin, copolymer generated from reaction of dimer acid, cholamine and polyethylene polyamine and copolymer generated from reaction of acrylamide, styrene and methacrylic acid. The movable shearing force and six-speed viscometer of the oil base drilling fluid is respectively less than 6 r/min and 3 r/min, and the 10-min static shearing force can be kept steady within 4-65 DEG C; constant eheology is realized in the temperature range of the barrel of the deepwater drilling, technical demands on sea deepwater drilling can be satisfied, requirements on base oil raw material are loose, and the cost is low.

The invention relates to a high-efficiency and novel biological carrier for a sewage biological treatment and a preparation method thereof. The biological carrier is prepared by comprising the following steps of: blending, extruding or injection-molding the following components: PP, PE, and ethylene-propylene copolymer, compatilizer, inorganic materials, plant materials, magnetic particles, and waste rubber according to a certain proportion, thus providing a biological carrier with large specific surface area, high hydrophilicity and easy hanged membrane on surfaces. The shapes of the biological carriers can be spherical, fibrous and polyhedral or powdery with various forms. The chemical or physical methods such as grinding, acid base reaction, coating on surface and the like can also be carried out to prepare the biological carrier, thus further improving the specific surface area, strengthening the adhesive ability of the biological membrane on the carrier, and improving the microorganism concentration. The preparation method of the biological carrier provided by the invention is simple, has wide adjusting range of the carrier density, easy obtaining materials, low cost, high efficiency of eliminating COD and variety shapes, can be lighter or heavier than water, and is applicable to all biological wastewater treatments.

Disclosed herein are co-formed fibrous structures that are composed of (a) a plurality of filaments that have a biobased content of at least about 25% and selected from the group consisting of polypropylene, polyethylene, polymethylpentene, polybutylene-1, polyisobutylene, ethylene propylene copolymer, ethylene propylene diene monomer copolymer or rubber, and mixtures thereof; and, (b) a solid additive including a cellulosic fiber. The solid additive is present in an amount of at least about 30 wt. %, based on the total weight of the fibrous structure. The co-formed fibrous structures of the invention can themselves be articles, such as, paper, fabrics, and absorbent pads.

A method for producing a structured material for accommodating passage of fluids, particularly high viscosity fluids, through the structured material. In one embodiment, the structured material is a composite material formed of a first layer, for example a polypropylene polymer, having a first shrinkage extent and a second layer bonded to the first layer, for example an ethylene-propylene copolymer, having a second shrinkage extent different from the first shrinkage extent. In another embodiment, a structured heterogenous material is made of a heterogeneous mixture of at least two homogeneous fiber sets or components having different shrinkage extents.

The preparation process of functional polyolefin resin includes electronic beam or gamma-ray pre-irradiation treatment of functional polyolefin resin; mechanical mixing of polyolefin resin after pre-treatment, functional monomer and electron donor reagent; and reacting extrusion for the polyolefin resin in molten state and functional monomer to produce grafting reaction. The polyolefin resin includes polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-styrene copolymer, polystyrene, etc; the functional monomer is unsaturated organic acid or its derivative with amino group, isocyanate, hydroxyl group or other reactive functional group; and the electron donor reagent includes electron-rich compound with P, N, S or O element, p-benzoquinone, triphenyl phosphite, triphenyl phosphate, etc.

The present invention relates to an impact-resistant olefin polymer composition including a polypropylene matrix having a weight average molecular weight and an ethylene-containing polymer including an ethylene-propylene copolymer having a molecular weight higher than the weight average molecular weight of the polypropylene matrix, the composition containing about 20 to 35 percent xylene solubles, and the xylene solubles fraction of the composition containing less than about 39 weight percent ethylene units, based on the combined weight of olefin monomers in the copolymer. The present invention further relates to impact copolymer compositions with a melt flow rate greater than about 8 that meet or exceed all pallet testing requirements. The compositions have superior stiffness-impact balance performance and excellent gloss and are useful for a number of applications including, but not limited to pallets, water-storm chambers, automotive compounding, septic tanks, bins, pales, crates, totes and plastic containers.

The invention relates to a high-barrier semi-high temperature cooking liquid packaging material and a packaging bag made of the same. The high-barrier semi-high temperature cooking liquid packaging material is a composite membrane prepared by stacking a polyester film (PET) layer, an aluminum foil (Al) layer, a nylon (PA) layer and a polyethylene film (PE) layer from top to bottom by a dry compound machine. The PE layer is prepared by coextrusion blow molding on a surface layer, a middle layer and a heat seal layer; the surface layer is prepared by blending metallocene PE and LDPE in a weight ratio of 2-4:1; the middle layer is prepared by blending metallocene PE and LDPE in a weight ratio of 3-5:1, and adding ethylene propylene copolymer elastomer accounting for 10%-15% of the total weight of the middle layer; and the heat seal layer is prepared by blending metallocene PE and zinc neutralized ethylene copolymer in a weight ratio of 3-5:1. The invention employs a high quality material containing metallocene PE, which is added with a proper amount of an ethylene propylene copolymer elastomer, and especially the heat seal layer is added with the zinc neutralized ethylene copolymer; and the PE layer prepared through blow molding by a three-layer co-extrusion film blowing machine.

The invention discloses lubricating grease used for an automobile hub bearing and a preparation method thereof. The lubricating grease used for an automobile hub bearing comprises the following components by weight: 70-90% of base oil; 5-20% of a soap thickener; 1-5% of an extreme pressure antiwear agent; and 5-15% of a polymer composed of one or several of an ethylene-propylene copolymer, polymethacrylate, and polyisobutylene; and 1-3% of an antioxidant. With a scientific formula and simple preparation technology, the lubricating grease of the invention overcomes many disadvantages existing in prior art, and realizes the advantages of excellent high temperature performance, extreme pressure performance, adhesion performance, shearing resistance and water resistance. The lubricating grease provided in the invention is suitable for lubricating automobile hub bearings, especially suitable for long time lubrication of high temperature, high speed and high load heavy truck and coach hub bearings.

The invention discloses an antibacterial ES composite short fiber used for a surface layer of a hot-air non-woven fabric. The ES composite short fiber has a skin-core structure, that is, the fiber iscomposed of a core layer and a skin layer; the core layer is prepared from, by weight, 90-97 parts of polypropylene and 2-5 parts of an ethylene-propylene copolymer; the skin layer is prepared from, by weight, 85-95 parts of polyethylene, 5-7.5 parts of methyl methacrylate graft modification polyethylene, 3-6 parts of an ethylene-propylene copolymer and 6-9 parts of a composite antibacterial agent; the composite antibacterial agent is prepared from, by weight, 70-85 parts of chitosan-grafted sodium polyacrylate super absorbent resin, 70-85 parts of a crylic acid-2-acrylamide-2-methyl propanesulfonic acid copolymer, 25-37 parts of silver nitrate and 5-9 parts of nanometer silver. The antibacterial ES composite short fiber used for the surface layer of the hot-air non-woven fabric is high inantibacterial efficiency and has a lasting antibacterial effect, and the prepared surface layer of the hot-air non-woven fabric is good in softness and texture, high in longitudinal and transverse strength and durable.

The present invention relates to a heterophasic polypropylene resin comprising a polypropylene homo- or copolymer matrix phase (A) and an ethylene-propylene copolymer phase (B) dispersed within the matrix, wherein the heterophasic polypropylene resin has a fraction insoluble in p-xylene (XCU) at 25 DEG C with an intrinsic viscosity of 2.0 dl/g or less, determined according to DIN EN ISO 1628-1 and -3, and a fraction soluble in p-xylene (XCS) at 25 DEG C having an intrinsic viscosity of 2.0 to 4.5 dl/g, determined according to DIN EN ISO 1628-1 and -3, and an amount of ethylene monomer units of 60 to 85 mol%, a heterophasic polypropylene composition comprising such a resin, a process for preparing that resin, and an article made thereof.

The invention provides metal processing oil for tapping and a preparation method thereof. The metal processing oil contains base oil, extreme-pressure agent, oiliness agent, viscosity regulator, anti-rusting agent and antioxidant, wherein the extreme-pressure agent contains chlorine, sulfur and phosphorus; the oiliness agent is vulcanizing grease; the viscosity regulator is ethylene-propylene copolymer or polyisobutene; the anti-rusting agent is dodecenyl succinic acid; and the antioxidant is one or mixture of 2,6-di-tert-butyl-methyl phenol, phenyl-alpha-naphthylamine, benzotriazole and derivatives thereof. The metal processing oil for tapping has excellent lubricating property, high extreme pressure and high cooling property, has a simple preparation method, and can be used for drillingand tapping of stainless steel, alloy steel and high carbon steel.