37results about How to "Excellent low temperature impact resistance" patented technology

The invention provides a polypropylene composition for a solar battery and a preparation method thereof, wherein the polypropylene composition for the solar battery comprises 50-100 parts by weight of at least one of homo-polymerized polypropylene and co-polymerized polypropylene, 0-50 parts by weight of inorganic filler, 15-25 parts by weight of anti-ultraviolet assistant, 0.2-30 parts of antioxidant, 0.5-20 parts by weight of plasticizer and 0.1-10 parts by weight of modified polymer. According to the invention, the polypropylene composition for the solar battery has good weather resistance, ultraviolet resistance and low-temperature impact resistance.

The invention relates to the technical field of hot-rolled steel coils, and specifically discloses a high-strength, corrosion-resistant and cold-resistant hot-rolled steel coil and a production method and application thereof. The high-strength, corrosion-resistant and cold-resistant hot-rolled steel coil includes the following components in weight percentage: C: 0.15% to 0.20%, Si≤0.1%, Mn: 0.025% to 0.055%, P≤0.020%, S≤0.010%, ALs: 0.02% to 0.06%, Ti: 0.025% to 0.050%, Cu: 0.10% to 0.20%, Cr: 0.30% to 0.60%, V: 0.01% to 0.03%, and the rest are iron and inevitable impurities. In the invention, titanium, copper, vanadium, chromium, manganese and other elements are added to the steel, so that the hot-rolled steel coil has excellent deformation properties, and also has the functions of high strength, corrosion resistance and cold resistance.

The invention discloses a flame-retardant PVC cable tube and a preparation method thereof. The flame retardant PVC cable tube comprises the following components: polyvinyl chloride resin, phenolic resin, flame retardant masterbatch, a plasticizer, an antioxidant, oxidized polyethylene wax, a filler, a coupling agent, a corrosion resistant filler, a shock resistance modifier and pigment. The corrosion resistant filler includes, by weight, 5-12 parts of modified aramid fibers, 16-20 parts of ceramsite, 3-8 parts of graphene, 15-30 parts of epoxy resin emulsion, 5-10 parts bentonite and 3-6 partsof a ceramic adhesive. The shock resistance modifier includes, by weight, 11-16 parts of polylactic acid, 7-13 parts lignin fiber, 4-8 parts beet pulp, 3-7 parts of soybean meal, 8-14 parts of polyolefin elastomer, 5-10 parts of piperazine pyrophosphate and 20-30 parts of polystyrene resin. The flame-retardant PVC cable tube has the advantages of good flame retardancy, high corrosion resistance and strong impact resistance.

The invention provides a propylene random block copolymer (A) that has a melt flow rate from 0.1 to 100 g / 10 min and a melting point from 100 to 155 DEG C and includes 90 to 60% by weight of a portion insoluble (D insol ) in n-decane at room temperature and 10 to 40% by weight of a portion soluble (D sol ) in n-decane at room temperature, wherein the D insol satisfies the following requirements (1) through (3) and the D sol satisfies the following requirements (4) through (6). The invention further provides molded articles such as sheets, films, injection molded articles, hollow molded articles, injection blow molded articles and fibers, which are formed of the propylene random block copolymer (A) or a propylene resin composition containing the propylene random block copolymer (A). (1) The molecular weight distribution (Mw / Mn) obtained by GPC of the D insol is from 1.0 to 3.5, (2) the content of skeletons derived from ethylene in the D insol is from 0.5 to 13% by mole, (3) the total amount of 2,1- and 1,3-propylene units in the D insol is 0.2% by mole or less, (4) the molecular weight distribution (Mw / Mn) obtained by GPC of the D sol is from 1.0 to 3.5, (5) the intrinsic viscosity [] in decalin at 135 DEG C of the D sol is from 1.5 to 4 dl / g and (6) the content of skeletons derived from ethylene in the D sol is from 15 to 35% by mole.

A polycarbonate-based resin composition that combines 0.5-40 parts by mass of a white pigment (B) and 0.02-5.0 parts by mass of a hydrolysis resistance agent (C) per 100 parts by mass of a polycarbonate-based resin (A) containing a predetermined polycarbonate-polyorganosiloxane copolymer (A1).

The invention discloses a solvent-resistant and low temperature impact-resistant polycarbonate alloy material and a preparation method thereof. The alloy material concretely comprises, by weight, 30-70 parts of PC resin, 8-20 parts of PET resin, 5-20 parts of polymer composite microspheres, 1-3 parts of an antioxidant and 0.5-2 parts of a lubricant, and the polymer composite microspheres are prepared from, by weight, 3-10 parts of a fluorine-containing acrylate / maleic anhydride block copolymer, 1-7 parts of functionalized fullerene powder and 1-3 parts of a surfactant. Functionalized polymer composite microsphere master batches are prepared by using an efficient emulsion polymerization process, the organic-inorganic hybrid polymer composite microspheres take fullerene C60 as a core and thefluorine-containing acrylate / maleic anhydride copolymer as a long-chain branch, the unique core-shell structure can improve the stability of the PC / PBT alloy material in various chemicals, and an acrylate elastomer layer has good interfacial compatibilizing and toughening effects as a microsphere shell.

The invention discloses a low-temperature-impact-resistant PP (polypropylene) plastic and a preparation method thereof. The impact-resistant low-temperature PP plastic comprises PP, low-density polyethylene, ethylene-propylene copolymers, propylene-Farnesene copolymers, pitch-based carbon fibers, silochrom, chopped nylon fibers, antioxidants and lubricating agents. Low-temperature-impact resistance and mechanical properties of the low-temperature-impact-resistant PP plastic are enhanced.

Provided is a laminate that has excellent low-temperature impact resistance and bursting pressure strength at high temperatures despite having a thick modified polyolefin layer.The laminate has two or more layers including an (a) layer and a (b) layer, the (a) layer includes an aliphatic polyamide composition (A), and the (b) layer includes a modified polyolefin (B). The modified polyolefin (B) includes a unit derived from a monomer based on an alfa-olefin having 2-10 carbon atoms, and a unit derived from an unsaturated compound having at least one functional group selected from the group consisting of: unsaturated compounds having at least one group selected from the group consisting of a carboxyl group, a hydroxyl group, an epoxy group, an amino group, an amide group, an imide group, a nitrile group, a thiol group, and an isocyanate group; and derivatives of unsaturated compounds having a carboxyl group. The Shore hardness (D scale) of the modified polyolefin (B) as measured according to ASTM D2240 is 30-61.

The invention discloses a treatment method of 630 steel, which comprises the following steps: carrying out hot rolling, and forging to form a 630 steel bar; carrying out solution treatment on the 630 steel bar at 1000-1100 DEG C, and cooling the bar to room temperature in air; carrying out overaging treatment on the 630 steel bar at 680-740 DEG C, wherein the number of minutes for treatment is determined according to the number of millimeters of the bar diameter; cooling the bar to room temperature in air; carrying out thermal-insulation heating treatment on the 630 steel bar at 1000-1080 DEG C, and cooling the bar to room temperature in air; and carrying out aging treatment on the 630 steel bar at 580-640 DEG C, and cooling the bar to room temperature in air. When the method is used for treating the 630 steel, the ballistic work of the 630 steel at -40 DEG C can be greater than or equal to 45J, thereby enhancing the low-temperature impact resistance of the 630 steel.

The present invention relates to a polycarbonate composition and the application thereof. The polycarbonate composition includes a polycarbonate (A), a first phosphate compound (B1), a second phosphate compound (B2), a polyvinyl fluoride resin (C) and a small size of core-shell polymer (D); the diameter thereof is less then 0.2[mu]m. The polycarbonate composition has better low temperature impact resistance and fire resistance via appropriate dosage of the first phosphate compound (B1), the second phosphate compound (B2), and the small size of core-shell polymer (D), molding products made by the polycarbonate composition's subsequent application are suitable for using in cold regions.

The invention aims to provide a thermoplastic resin composition having excellent mechanical physical property, especially excellent surface impact strength at low temperature, characterized in that the thermoplastic resin composition having excellent impact resistance at low temperature comprises 99% to 50% by weight of thermoplastic resin (composition A) and 1% to 50% by weight of block copolymer (composition B) composed of S block with polystyrene as the main composition, B block with poly (1,4-butadiene) as the main composition and M block with polymethylmethacrylate as the main composition, and the block copolymer includes at least one binding unit selected from a group consisting of S-B-M, M-S-B-S-M and M-B-S-B-M.

The invention discloses a pipe joint, whose chemical composition and weight percentage are: carbon 0.27-0.34%, manganese 0.66-1.09%, phosphorus ≤ 0.020%, sulfur ≤ 0.015%, silicon 0.13-0.37%, nickel 0.72-0.93% , chromium 0.81-1.09%, molybdenum 0.33-0.47%, aluminum 0.01-0.031%, niobium 0.015-0.035%, vanadium 0.03-0.06%, copper ≤ 0.15%, and the balance is iron and unavoidable impurities. In the present invention, by rationally controlling the dosage of each component, each component synergizes and promotes each other, improves the strength and plasticity of the material, and improves the low-temperature impact resistance of the forging; adopts the post-forging heat treatment process and the heat treatment of quenching and tempering of the present invention process, refining the precipitation strengthening phase, improving the corrosion resistance of steel, and further improving the low temperature impact resistance of forgings.

The present invention relates to a thermoplastic polyester and olefin-alkyl (meth)acrylate copolymer with high melt flow index, in which the thermoplastic polyeste contains a alpha-alkene and at least one of (meth)acrylate(s) with 1-4C aliphatic alcohols showing a melt flow index(MFI) of not less than 50 g / 10 min. The present invention also relates to a method of preparing the thermoplastic polyester and to the use of the thermoplastic moulding material in electric, electrical, telecom, motor or computer industries, and model piece application in gym, domestic appliance, medicine or entertainment industries.

The present invention provides a low-temperature-impact-resistant epoxy adhesive composition, which comprises: at least two epoxy resins; at least a bifunctional epoxy diluent; at least three toughening agents, wherein the toughening agents at least comprise a liquid rubber toughening agent having a core-shell structure, an epoxy resin modified nitrile butadiene rubber, and a ketoxime-terminated reactive polyurethane elastic prepolymer; at least an inorganic filler; at least a water removing agent; at least a thixotropic agent; at least a thermally-activated latent curing agent; and at least acuring accelerator. According to the present invention, the two different epoxy resins are used as the raw materials, and the composite toughening agent at least comprising the liquid rubber toughening agent having the core-shell structure, the epoxy resin modified nitrile butadiene rubber and the ketoxime-terminated reactive polyurethane elastic prepolymer is added, such that the obtained epoxyadhesive composition has good low-temperature-impact resistance.

The invention provides a polypropylene composition for a solar battery and a preparation method thereof, wherein the polypropylene composition for the solar battery comprises 50-100 parts by weight of at least one of homo-polymerized polypropylene and co-polymerized polypropylene, 0-50 parts by weight of inorganic filler, 15-25 parts by weight of anti-ultraviolet assistant, 0.2-30 parts of antioxidant, 0.5-20 parts by weight of plasticizer and 0.1-10 parts by weight of modified polymer. According to the invention, the polypropylene composition for the solar battery has good weather resistance, ultraviolet resistance and low-temperature impact resistance.