8254 results about "Poly ethylene" patented technology

The present invention relates to a composition comprising more than 25 weight % (based on the weight of the composition) of one or more ethylene polymers having an Mw of 20,000 g / mole or more and at least 0.1 weight % of a liquid hydrocarbon modifier where the modifier has: 1) a viscosity index of 120 or more, and 2) an kinematic viscosity of 3 to 3000 cSt at 100° C., and 3) a pour point of −10° C. or less, and 4) a flash point of 200° C. or more; and wherein the modifier contains less than 5 weight % of functional groups selected from hydroxide, aryls, substituted aryls, halogens, alkoxys, carboxylates, esters, acrylates, oxygen, nitrogen, and carboxyl, based upon the weight of the modifier.

The invention relates to stable pharmaceutical or cosmetic foam compositions containing certain active agents, having unique therapeutic properties and methods of treatment using such compositions. The foamable composition includes at least one solvent comprising polyethylene glycol (PEG) or PEG derivative and mixtures thereof, or comprising propylene glycol, wherein the solvent is present at a concentration of about 70% to about 96.5% by weight of the total composition, at least a non-ionic surface-active agent at a concentration of about 0.1% to less than about 10% by weight of the total composition.

A functionalized mesoporous carbon composition comprising a mesoporous carbon scaffold having mesopores in which polyvinyl polymer grafts are covalently attached, wherein said mesopores have a size of at least 2 nm and up to 50 nm. Also described is a method for producing the functionalized mesoporous composition, wherein a reaction medium comprising a precursor mesoporous carbon, vinyl monomer, initiator, and solvent is subjected to sonication of sufficient power to result in grafting and polymerization of the vinyl monomer into mesopores of the precursor mesoporous carbon. Also described are methods for using the functionalized mesoporous carbon, particularly in extracting metal ions from metal-containing solutions.

The invention discloses an alpha-nickel diimine compound olefin polymerization catalyst and a preparation method thereof, and a method for preparing branched polyethylene. Structural formulas of the alpha-nickel diimine compound olefin polymerization catalyst are shown as a formula (I) and a formula (II), and the preparation method of the alpha-nickel diimine compound olefin polymerization catalyst is simple and low in cost, and can catalyze ethylene polymerization with high activity at a temperature of more than or equal to 80 DEG C to obtain high molecular weight polyethylene. The polyethylene prepared by catalyzing of the alpha-nickel diimine compound olefin polymerization catalyst has high molecular weight, and can prepare molecular weight which reaches more than 10<2>*kg / mol in the temperature range of between 0 and 80 DEG C.

The invention relates to a composite comprising a weight fraction of single-wall carbon nanotubes and at least one polar polymer wherein the composite has an electrical and / or thermal conductivity enhanced over that of the polymer alone. The invention also comprises a method for making this polymer composition. The present application provides composite compositions that, over a wide range of single-wall carbon nanotube loading, have electrical conductivities exceeding those known in the art by more than one order of magnitude. The electrical conductivity enhancement depends on the weight fraction (F) of the single-wall carbon nanotubes in the composite. The electrical conductivity of the composite of this invention is at least 5 Siemens per centimeter (S / cm) at (F) of 0.5 (i.e. where single-wall carbon nanotube loading weight represents half of the total composite weight), at least 1 S / cm at a F of 0.1, at least 1×10−4 S / cm at (F) of 0.004, at least 6×10−9 S / cm at (F) of 0.001 and at least 3×10−16 S / cm (F) plus the intrinsic conductivity of the polymer matrix material at of 0.0001. The thermal conductivity enhancement is in excess of 1 Watt / m-° K. The polar polymer can be polycarbonate, poly(acrylic acid), poly(acrylic acid), poly(methacrylic acid), polyoxide, polysulfide, polysulfone, polyamides, polyester, polyurethane, polyimide, poly(vinyl acetate), poly(vinyl alcohol), poly(vinyl chloride), poly(vinyl pyridine), poly(vinyl pyrrolidone), copolymers thereof and combinations thereof. The composite can further comprise a nonpolar polymer, such as, a polyolefin polymer, polyethylene, polypropylene, polybutene, polyisobutene, polyisoprene, polystyrene, copolymers thereof and combinations thereof.

The invention discloses a high-resilience chemical crosslinked polyethylene foam material and a preparation method thereof. The material mainly comprises the following components by weight: 50-100 parts of polyethylene resin, 0.1-50 parts of elastomer, 5-50 parts of foaming agent, 0.1-5 parts of cross-linking agent, 0.1-10 parts of foaming assistant, and 0.1-5 parts of cross-linking assistant; the components are internally mixed, pelletized, mixed, extruded, and formed into non-cross-linking extruded master slices, and then the master slices are cross-linked and foamed by heating. According to the invention, the elastomer is mixed into PE (poly ethylene) resin to form the foam material, so the resilience of the product is high; meanwhile, the product further has high elongation at break and tensile strength, excellent toughness, and stable chemical and physical properties, so that the product can be widely used in the fields of packaging, sports and protection, transportation and the like.

The present invention relates to a Phase Change Material (PCM) composition comprising a) from 20 to 80 wt % of a PCM; and b) from 20 to 80 wt % of one or more polymers chosen from the group consisting of b1) Very Low Density Polyethylene (VLDPE) having a density equal or lower than 0.910 g / cm3 measured according to ASTM 792; b2) Ethylene Propylene Rubber (EPR) having a density equal or lower than 0.900 g / cm3 measured according to ASTM 792; b3) Styrene Ethylene Butadiene Styrene (SEBS) copolymers; and b4) Styrene Butadiene Styrene (SBS) copolymers. The PCM composition of the present invention can be used in applications where thermal management is needed, like for example in building, automotive, packaging, garments and footwear.

Compositions comprising a glycosaminoglycan (e.g., a hyaluronan, hyaluronic acid, hyaluronate, sodium hyaluronate, dermatan sulfate, karatan sulfate, chondroitin 6-sulfate, heparin, etc.) in combination with at least one component selected from; i) polyglycols (e.g., polyethylene glycol), ii) long chain hydroxy polyanionic polysaccharides (e.g., dextran, sodium alginate, alginic acid, propylene glycol alginate, carboxymethyl cellulose and carboxyethyl cellulose, hydroxyl ethyl starch, hydroxyl propyl methyl cellulose, hydroxy propyl ethyl cellulose, hydroxy propyl cellulose, methyl cellulose, polylysine, polyhistidine, polyhydroxy proline, poly ornithine, polyvinyl pyrolidone, polyvinyl alcohol, chitosan, etc.) and iii) long chain Nitrogen containing polymers (e.g., Polylysine, Polyvinylpyrrolidone, and polyvinyl alcohol). The invention also includes methods for using such compositions (e.g., as substance delivery materials, tissue fillers or bulking agents, as moistening or hydrating agents, etc.)

The polishing slurry of the invention is a polishing slurry for polishing a silicon oxide film on polysilicon, which contains an abrasive, polysilicon polishing inhibitor, and water. As the polishing inhibitor, it is preferable to use (1) a water-soluble polymer having a N-monosubstituted or N,N-disubstituted skeleton substituted by any member selected from the group consisting of acrylamide, methacrylamide, and α-substituted derivatives thereof, (2) polyethylene glycol, (3) an oxyethylene adduct of an acetylene-based diol, (4) a water-soluble organic compound having an acetylene bond, (5) an alkoxylated linear aliphatic alcohol, or (6) a copolymer containing polyvinyl pyrrolidone or vinyl pyrrolidone. There is provided a polishing method which is capable of polishing a silicon oxide film on a polysilicon film at a high speed, and inhibiting the progress of polishing of a polysilicon film in exposed parts in the manufacturing method for a semiconductor.

A multi-stage process for preparing ethylene (co)polymers having broad molecular weight distributions is disclosed, said process comprising:(A) a first polymerization stage in which, in the presence of a Ti or V catalyst, a first ethylene polymer is prepared;(B) a treatment stage in which the catalyst used in the first stage is deactivated and in which a bridged bis-2-indenyl zirconocene is supported on the ethylene polymer produced in stage (A), optionally in the presence of a suitable cocatalyst; and(C) a second polymerization stage in which ethylene is polymerized in the presence of the product obtained from stage (B).Furthermore, polyethylene obtainable by the above process is disclosed, having intrinsic viscosity ranging from 0.5 to 6 dl / g, Mw / Mn>8 and cold xylene solubility<1.2% wt.

The invention discloses an olefin polymeric catalyst and preparing method and reacting technology, which is characterized by the following: the expression formula of catalyst is [SiO2-Cat], wherein Cat represents semi-sandwich homogeneous phase catalyst of transient element metallic titanium (IV) or zirconium (IV); SiO2 represents dielectric molecular sieve SBA-15 decorated by methyl alundum alkyl, which can synthesize polyethylene; the catalyst possesses high ethylene polymeric activity, which displays ultrahigh molecule with different patterns.

The invention discloses a preparation method of a hydrophilic antimicrobial film of which the surface is coated with dopamine and polyethyleneimine cations. The preparation method comprises the following steps that a base film is prepared, the base film is immersed in a dopamine solution, a polydopamine layer is formed on the surface of the base film by dopamine auto-agglutination, and the polydopamine layer and a polyethyleneimine aqueous solution undergo a reaction so that the hydrophilic antimicrobial film is prepared by the cationization reaction. The preparation method is simple and easy and has mild reaction conditions. The prepared hydrophilic antimicrobial film has excellent hydrophilicity and antibacterial properties, reduces adherence of microbes such as organic matters and bacteria, has a bacterium killing capability and prolongs a film service life.

The invention discloses a loading non-metallocene single active central catalyst composition which is obtained through adopting an alkyl aluminoxane / magnesium chloride / silica gel carrier as a carrier and loading a non-metallocene single active central transition metal composition and a preparation method thereof. The catalyst system consisting of the catalyst composition catalyzes ethylene to polymerize or copolymerize and has high polymerization activity. The carrier is simple to prepare; the prepared loading catalyst granule has good shape and adjustable size; and the obtained polythene powdery material has high stacking density.

The invention discloses a low-smoke halogen-free flame-retardant polyolefin cable material and a preparation method thereof. The formula of the cable material comprises the following raw materials in percentage by weight: 20-30% of ethylene-vinyl acetate copolymer, 10-20% of linear low-density polyethylene, 3-6% of compatilizer, 50-60% of inorganic flame retardant, 2-5% of synergistic flame retardant, 0.5-1% of coupling agent, 0.2-0.5% of lubricant and 0.2-0.5% of antioxidant. The preparation method of the cable material comprises surface treatment of the inorganic flame retardant, burdening,mixing, milling, extrusion and granulation and other process steps. Compared with the prior art, the cable material disclosed by the invention has the advantages of superior flame retardancy, low smoke, low toxicity, no droplets, good processing performance, good dispersion of the inorganic flame retardant, and better uniformity and surface finish degree.

The invention belongs to the field of road engineering, and particularly relates to a hyperviscous and high-elastic asphalt modifier applicable to steel bridge deck pavement. The asphalt modifier comprises the following raw materials in parts by weight: 3-10 parts of junked tire rubber powder, 3-10 parts of polyethylene wastes, 3-8 parts of styrene-butadiene-styrene block copolymer, 1-5 parts of styrene-isoprene-styrene block copolymer, 1-5 parts of terpene resin, 5-10 parts of solvent naphtha, and 0.3-0.7 part of alcohol ether carboxylate adhesion agent. In addition, a modified asphalt and amodified asphalt mixture are prepared on the basis of the modifier, the 60 DEG C dynamic viscosity of the modified asphalt prepared by applying the modifier can reach more than 300000Pa.s, and the performance grading reaches PG 88-28; and the asphalt mixture has favorable water stability, higher dynamic modulus, higher track dynamic stability and low temperature failure strain, and can resist complicated mechanics and temperature environment of a steel bridge deck.

The invention provides a method for preparing a nano-silver wire with high length-diameter ratio. At least one polyhydroxy liquid organic (1), silver nitrate (2), polyvinylpyrrolidone (PVP) with a K value equal to or larger than 30 (3), at least one hydrogen nitrate compound or one hydrogen-containing compound (4) and at least one chloride for a reaction solution, wherein the chloride can be dissolved in the polyhydroxy liquid organic and can produce chloride ions after dissolved. Reaction is perform for more than 10 minutes under the condition that the reaction temperature is lower than the boiling temperature of the polyhydroxy liquid organic or a part of ingredients is subjected to chemical reaction to form a nano-silver wire solution containing length-diameter ratio exceeding 200, and solid-liquid separation is performed to obtain the nano-silver wire or nano-silver wire dispersing liquid. The nano-silver wire prepared by means of the method is high in length-diameter ratio and yield, few in impurities and good in thickness and length uniformity, and the shortcomings including complicated preparing technology process by means of a traditional polyol method, many impurities and non-uniformity by means of a microwave method and the like are overcome.

Disclosed is a refrigerator oil composition containing a base oil (A) composed of a polyvinyl ether, an organic sulfur compound (B) having a sulfur content of not more than 35% by mass and a refrigerant (C), in which a total sulfur content is 0.01 to 0.1% by mass with respect to a total amount of the components (A) and (B). Such the novel refrigerator oil composition does not cause environmental problems such as ozone layer destruction and global warming, and can retain the lubrication properties for a long period of time, while preventing a capillary in a refrigeration cycle from clogging.

A film that comprises a mixture of a block copolymer and a polyethylene polymer. One embodiment of such a film is a film comprising a block copolymer selected from the group consisting of poly(styrene)-co-poly(ethylene-butylene)-co-poly(styrene) copolymer and poly(styrene)-co-poly(ethylene-butylene) copolymer, and a polyethylene polymer. The film exhibits improved self-adhesive properties and is suitable for use in a disposable absorbent product intended for the absorption of fluids such as body fluids.

The invention discloses a polybutene alloy material and a preparation method thereof, and belongs to the field of polyolefin material, specifically relates to a polybutene alloy material and a preparation method thereof. The polybutene alloy material provided by the present invention comprises, by mass, 50-99% of poly-1-butene, 1-40% of polypropylene and 0-10% of a butane-propylene copolymer. Thepreparation method is characterized by: adopting a TiCl4 / MgCl2 supported titanium catalyst for synthesis of the polybutene alloy material through a two-phase polymerization method. The polybutene alloy material provided by the present invention has a core-shell structure, and has advantages of the combination of the excellent impact resistance of the poly-1-butene, the heat resistance and creep property of the poly-1-butene, the low shrinkage rate of the poly-1-butene, the high modulus of the polypropylene, the high surface hardness of the polypropylene, the rapid shaping of the polypropylene, and the like, such that the polybutene alloy material can replace the partial use of the poly-1-butene and the polypropylene. In addition, the polybutene alloy material can be applicable for preparation of the pipe and the pipe fitting, toughening modification of the polypropylene, or the polybutene alloy material can be used as the general polyolefin material.

A process for making an ink jet ink comprising: a) providing a dispersion containing a pigment, a hydrocarbon carrier, and a polyamine / fatty acid condensation polymer dispersant; b) mixing the pigment dispersion with rigid milling media less than 100 mu m; c) introducing the mixture of step (b) into a mill; d) milling the mixture from step (c) until the pigment particle size is below about 100 nanometers (nm); e) adding to the mixture during or after step d) or f) (below) a stabilizer selected from the group consisting of a polyether polyol; a modified polyester resin; an acrylic polymer; an alkylol ammonium salt of a block copolymer having acidic groups; ethoxylated triethanolamine; a high molecular weight block copolymer having an amine functionality; sorbitan sesquioleate; polyhydroxy stearic acid; butylated polyvinyl pyrrolidone; poly(vinylpyrrolidone / 1-hexadecene); and poly(p-tert-butylstyrene-co-styrene-co-2-sulfoethyl-lithium methacrylate); f) separating the milling media from the mixture milled in step (d); and g) diluting the mixture to obtain an ink jet ink having a pigment concentration suitable for ink jet printers.

Moisture curable flame retardant wire and cable formulations having improved abrasion resistance are provided. The compositions are comprised of a high density silane-containing polyethylene base resin which can be a blend of a bimodal HDPE and ethylene-silane copolymer or silane-grafted bimodal HDPE in combination with a flame retardant and silanol condensation catalyst.

These objects and others may be accomplished with the present invention, the first embodiment of which provides an oil-in-water nanoemulsion, which includes:an oily phase dispersed in an aqueous phase;(i) at least one amphiphilic lipid selected from the group including nonionic amphiphilic lipids, anionic amphiphilic lipids, and combinations thereof; and(ii) at least one water-soluble nonionic polymer selected from the group including homopolymers and copolymers of ethylene oxide; polyvinyl alcohols; homopolymers and copolymers of vinylpyrrolidone; homopolymers and copolymers of vinylcaprolactam; homopolymers and copolymers of polyvinyl methyl ether; neutral acrylic homopolymers and copolymers; C1–C2 alkyl celluloses and their derivatives; C1–C3 alkyl guar; C1–C3 hydroxyalkyl guar; and combinations thereof;wherein a ratio of the weight of the oily phase to the weight of the amphiphilic lipid (i) ranges from 1.2 to 10;and wherein the oily phase includes oil globules having a number-average size of less than 100 nm. The nanoemulsion obtained is preferably transparent and stable on storage. It may form a composition for topical, preferably cosmetic or dermatological compositions, pharmaceutical compositions and ophthalmological compositions.

The invention relates to an acid-resistant magnetic chitosan microsphere adsorbent as well as a preparation method and the application thereof, and in particular relates to acid-resistant magnetic chitosan microspheres which have the excellent absorption performance and recycling performance for acid waste water containing hexavalent chromium, a preparation method of the acid-resistant magnetic chitosan microspheres and the application of the acid-resistant magnetic chitosan microspheres. The preparation method of the acid-resistant magnetic chitosan microspheres comprises the following steps: (1) preparing Fe3O4 nano-particles modified by citric acid by using a coprecipitation method; (2) preparing single-coated magnetic SiO2 nano-particles by using a sodium silicate hydrolysis method or a sol-gel method; and (3) preparing the chitosan microspheres coated with magnetic SiO2 by taking chitosan powder as a raw material by adopting an emulsion crosslinking method. Furthermore, in order to further improve the adsorbing capacity of the microspheres, in the method, dendritic polyethylene imine is taken as a functional group for modifying the adsorbent, so that the modified chitosan microspheres can be obtained. The magnetic chitosan microspheres prepared by adopting the method not only have the excellent acid resistance, but also have the good absorption performance on Cr (VI) ions.

The present provides a carrier molecule for transporting a polyanioic macromolecule such as a nucleic acid across a biological barrier of a cell. The carrier has a biocompatible backbone polymer with two or more polycationic polymer fragments covalently linked. In one embodiment, the backbone polymer is polyethylene glycol (PEG) and the polycationic polymer is polyethylenimine (PEI). The copolymer carrier molecule can be complexed with a polyanionic macromolecule such as a nucleic acid (NA). The NA / copolymer complex is stable in biological conditions by forming a special coreshell-like micelle structure. The nucleic acid can be rapidly released from the complex when biodegradation linker are used to bind the polycationic polymer fragments to the polymer backbone. The carriers and complexes of the invention can be used tin methods of delivering the polycainonic macromolecules to cells both in vitro and in vivo.

A lubricating oil for compression-type refrigerators using a refrigerant containing pentafluoroethane which lubricating oil comprises a polyvinyl ether compound having (a) a constituting unit represented by general formula (I):or a polyvinyl ether compound having constituting unit (a) and (b) a constituting unit represented by general formula (I'):(wherein R represents a hydrocarbon group which has 1 to 3 carbon atoms and may have ether bond in the group, and R' represents a hydrocarbon group which has 3 to 20 carbon atoms and may have ether bond in the group) as the main component. The above lubricating oil shows excellent compatibility with hydrofluorocarbon refrigerants containing pentafluoroethane which can replace chlorofluorocarbons causing environmental pollution, has a high volume intrinsic resistance, and exhibits excellent stability and lubricating property.

The invention discloses an insulating and sheathing material of ultraviolet light crosslinking expanding type phosphorus nitrogen flaming resistance polyolefine cables and a preparation method thereof. The invention is characterized in that polyethylene / PEMA and / or ethylene vinyl acetate or maleic anhydride grafted ethylene vinyl acetate or acid amide grafted ethylene vinyl acetate copolymer are taken as base, added with expanding type phosphorus nitrogen halogen-free flame retardants, light trigger, polyfunctional group cross linker and chemical inhibitor and matched with flaming retardant synergistic agent, antismoke agent and processing aid, and then squeezed out and pelleted into photo-crosslinking flame retardant cable materials; and then the flame retardant cable materials are melted and extruded on a cable conductor wire core and clad into an insulating layer and a sheathing layer; hereupon the ultraviolet light irradiation crosslinking is carried on the insulating layer or the sheathing layer. Via detecting, the oxygen index of the insulating layer or the sheathing layer is larger than 30%, the vertical flaming experiment passes through UL-94 V0 level, the tensile strength is larger than 12Mpa, the elongation at break is larger than 350%, and the electric volume resistivity is larger than 8*10 omega.cm.

The invention discloses a loading metallocene catalyst composition which is obtained through adopting an alkyl aluminoxane / magnesium chloride / silica gel carrier as a carrier and loading a metallocene catalyst precursor, and a preparation method thereof. The catalyst system consisting of the catalyst composition catalyzes ethylene to polymerize or copolymerize and has high polymerization activity. Compared with a common loading metallocene catalyst with an alkyl aluminoxane / silica gel carrier, the activity can be doubled or more. The carrier is simple to prepare; the prepared loading catalyst granule has good shape and adjustable size; and the obtained polythene powdery material has high stacking density.