97results about How to "High low temperature impact resistance" patented technology

A flange is provided at the opening metal of a pressure container, and it extends toward the periphery of the container body at the bonding part thereof at which it bonds to the container body. The liner of the pressure container has a self-sealing part at which it abuts the flange to be sealed up together. On the outer peripheral side of the self-sealing part, a ring-shaped constraint member is provided in the outer periphery of the liner, and the constraint member is to restrict the diameter expansion of the liner to be caused by the expansion of the container body. The liner has an easily-displaceable part that is readily elongable and deformable, at the outer periphery thereof in the radial direction of the self-sealing part.

The invention discloses a weather-resistant high impact polystyrene material, which is characterized by comprising high impact polystyrene resin, an anti-ultraviolet agent, a toughener, an antioxidant, and a processing aid, and comprising the following components in part by mass: 80 to 100 parts of high impact polystyrene resin, 0 to 20 parts of general purpose polystyrene, 0.1 to 10 parts of light stabilizer, 1 to 15 parts of toughener, 0.1 to 1 part of antioxidant and 0.1 to 2 parts of processing aid. The weather-resistant high impact polystyrene material has high weather resistance and stable performance.

Disclosed is a mass polymerized rubber-modified monovinylidene aromatic copolymer composition with an excellent balance of physical and mechanical properties especially low temperature impact, and methods for preparing such a composition.

The invention particularly relates to a formulation of wood-plastic profile as well as a preparation method and a manufacturing device thereof. The formula is characterized by being prepared from the following raw materials in parts: 100 parts of PP waste plastic with good mobility, 20 to 75 parts of wood powder, 5 to 15 parts of flexibilizer; 2 to 10 parts of compatibilizer; 1 to 10 parts of lubricant; 0.1 to 1 part of main antioxidant; 0.1 to 0.5 part of auxiliary antioxidant; 0.02 to 0.5 part of light stabilizer and 0.1 to 4 parts of antibacterial agents; the preparation method is characterized by comprising the following steps:(1) recycling the PP waste plastic with good mobility; (2) cleaning, crushing and drying; 3) drying the wood powder; 4) extruding and granulating; and 5) extruding and molding; and the manufacturing device is characterized by comprising a plastic cleaning device, a wood powder drying device, a weighing device, a mixing device, an extrusion granulation device and an extrusion molding device. The invention has the advantages of low cost, durability, long life, good heat resistance, good resistance to ultraviolet rays, high hardness and high load capacity.

The invention discloses a long glass fiber enhanced polypropylene composite material water meter casing and a manufacture method of the long glass fiber enhanced polypropylene composite material water meter casing. A thermal plastic composite material water meter casing comprises the following ingredients: blending alloy, auxiliary agents, color powder, antioxidants and ultraviolet absorbers, wherein the blending alloy consists of glass fiber, polypropylene and/or polypropylene modified materials. The thermal plastic composite material water meter casing made by adopting an injection molding forming process has the characteristics of high-temperature resistance, low-temperature resistance, impact resistance, creep deformation resistance, water pressure resistance, hydrolysis resistance, no heavy metal, long service life, low cost, environmental-friendly effect and the like, is easy to process and conforms to the industrial standard of the national plastic water meter casing material, so the thermal plastic composite material water meter casing is particularly suitable for large-scale industrial production and wide popularization and application.

The invention discloses a high-impact-resistant-polyvinyl-chloride double-wall corrugated pipe and a preparing method thereof. The high-impact-resistant-polyvinyl-chloride double-wall corrugated pipe is prepared from polyvinyl-chloride resin, light calcium carbonate, an impact-resistant assistant, PE wax, stearic acid, a processing agent and a processing stabilizer. The polyvinyl-chloride resin is a main raw material, and is subjected to physical modification and extruded and produced, and the high-impact-resistant-polyvinyl-chloride double-wall corrugated pipe is obtained. The high-impact-resistant-polyvinyl-chloride double-wall corrugated pipe has the excellent low-temperature impact-resistant performance, and the high-impact-resistant-polyvinyl-chloride double-wall corrugated pipe and the preparing method thereof are suitable for preparing the high-impact-resistant double-wall corrugated pipe.

The invention relates to a nanometer polyvinyl chloride pipe and a preparation method thereof. According to weight ratio, raw materials of the nanometer polyvinyl chloride pipe comprise nanometer polyvinyl chloride resin, calcium carbonate, and PME-100 strengthening and toughening agent, etc. The preparation method is that: first, the raw materials needed are fully mixed in a high level mixing pot and a low level mixing pot; then the materials mixed are transported to an extruder production line to do extruding molding, thereby gaining the nanometer polyvinyl chloride pipe. The invention is characterized in that the invention is not only environment-friendly, but also solves the problems of insufficiency of thermal stability, initial coloring and products reddened and zinc burned, bad weather resistance and copper erosion, etc. During the mixing process of the preparation method, the plasticizing time is shortened, leading to a good plasticizing uniformity and being in favor of the basic extrusion molding process to the modification polyvinyl chloride. The mechanical property of the invention is distinctively higher than the common polyvinyl chloride resin and nanometer blending composite resin. The anti-impact performance and other performances are greatly enhanced The shock strength is two times the common resin products, and in particular the products has good shock strength in low temperature; in addition, the invention has good bending performance, thus being applied to no digging laying and repairing, etc.

The invention discloses an anti-impact-resistant modified polypropylene bumper material and an automobile bumper prepared therefrom. The bumper material comprises propylene, tetra(2,6-dimethylphenyl)-m-resorcinol diphosphate, tetra-(2,6-dimethylphenyl)-p-resorcinol diphosphate, a metallocene polyolefin elastomer, nylon, maleic anhydride, thermoplastic polyurethane, inorganic composite particles, vinyl triethoxyl silane, ethylene propylene rubber, polyethylene, a shear thickening agent, polyisophthaloyl metaphenylene diamine fiber, an anti-static agent, an anti-oxidant, a dispersing agent, a plasticizer and a UV absorber. The bumper material is low in shrinkage rate, is high in flowability, is good in weather resistance and is excellent in paint performance, and meanwhile is high in toughness, strength, elongation at break and heat deflection temperature. The automobile bumper prepared from the bumper material is free of being broken even an automobile is slightly impacted.

The invention relates to compositions containing at least one solid epoxide resin A, at least one polymer B of formula (I), at least one thixotropic agent C made from a urea derivative and at least one curing agent for epoxide resins D activated by high temperatures. The compositions are particularly suitable for use as adhesives. Low-temperature impact-resistant adhesives can be produced for use in particular as structural adhesives.

The invention provides a polyamide toughening agent as well as a preparation method and use thereof. The polyamide toughening agent is mainly prepared from the following raw materials in parts by weight: 50-95 parts of an ethylene-octene copolymer elastomer, 0.5-2.5 parts of a grafting monomer, 5-50 parts of polyolefin, 0.05-0.5 part of an initiator and 5-20 parts of polyamide. The toughening agent provided by the invention is simple in preparation method, have good mechanical property and low-temperature impact toughness when being used for toughening the polyamide, and can be widely applied to modification of polyamide materials in the fields of inner and outer decorative parts of automobiles, electric tools, rail bases, transformers, oil tubes and the like.

To provide a propylene-based block copolymer which has high melt viscoelasticity, excellent balance between rigidity and impact resistance and good molding processablility and is extremely excellent in its molded product appearance, a composition containing the copolymer and molded products obtained therefrom. The propylene-based block copolymer comprises 5 to 80% by weight of a room temperature n-decane-soluble portion (Dsol) and 20 to 95% by weight of a room temperature n-decane-insoluble portion (Dinsol), with the proviso that the total amount of the Dsol and the Dinsol is 100% by weight, and satisfies the following requirements [1] to [3] at the same time: [1] the molecular weight distribution (Mw/Mn) of the Dsol is not less than 7.0 but not more than 30, [2] the molecular weight distribution (Mw/Mn) of the Dinsol is not less than 7.0 but not more than 30, and Mz/Mw thereof is not less than 6.0 but not more than 20, and [3] the pentad fraction (mmmm) of the Dinsol is not less than 93%.

The invention discloses a wire protective tube with a silicon core layer. The wire protective tube with the silicon core layer comprises a tube body and an inner core, wherein the tube body is a hollow cylinder, the outer diameter of the tube body is 40mm, the wall thickness of the tube body is 4mm, the tube body is made of high-density polyethylene materials, the temperature which can be borne by the tube body is more than 90DEG C, the pressure intensity borne by the tube body is 1.0-2.0MPa, the inner core is a silicon layer which is evenly plated on the inner wall of the tube body, and the thickness of the inner core is 1mm. According to the mode, the wire protective tube with the silicon core layer has the advantages of being simple in structure and beneficial to mass production, resisting abrasion, the high temperature and corrosion, being non-toxic, harmless, good in toughness, light in weight, good in strength, sturdy, durable, good in low-temperature impact resistance, and good in stress crack resistance performance, and having wide market prospect in popularization.

Provided is a method for forming a multilayer coating film giving excellent low temperature impact resistance to a substrate that comprises a metal material and a plastic material. The method for forming a multilayer coating film comprises sequential steps of forming an uncured primer coating film, an uncured first colored coating film, an uncured second colored coating film and an uncured clear coating film on a substrate; and heating the same so as to simultaneously cure these 4 coating films, wherein the aqueous first colored paint and aqueous second colored paint are each a 1-package type paint composition containing a specific hydroxyl group-containing resin and a specific blocked polyisocyanate compound.

The invention relates to a special material for a high-toughness and high-water pressure resistance polypropylene randon copolymer (PPR) pipe material and a preparation process of the special material. The special material is prepared from the following raw materials in percentage by mass: 85-90% of PPR, 10-15% of PPB-240, 0.1-0.3% of a beta-nucleating agent, 0.1-0.3% of an antioxidant and 0.3-0.5% of a lubricant. The preparation process mainly comprises the steps of weighing proper amounts of PPR, PPB, a beta-nucleating agent, an antioxidant and a lubricant according to the prescription, and mixing the materials in a low-speed mixer according to an order from higher proportion to lower proportion; setting a corresponding thread combination; setting heating temperature of various sections of charging barrels of a dual-screw extruder; adding mixed raw and auxiliary materials to a storage hopper of the dual-screw extruder set; starting a lubricating oil pump, a cooling fan, a grain cutting machine, cooling water, a main motor and a feeding motor, and regulating rotating speeds of the main motor and the feeding motor; drawing the extruded materials to the grain cutting machine through a cooling water bath and a blow drying machine, regulating rotating speed of the grain cutting machine, so that the cut materials are 3 in granularity and 3mm long; and detecting various physical indicators of the produced materials in real time.

A polycarbonate resin composition which has excellent low-temperature impact resistance and flowability high enough to enable thin molding and provides a coated molded article having a good appearance and high impact resistance. The resin composition comprises 100 parts by weight of a resin component including a polycarbonate resin (component A) and a polycarbonate-polydiorganosiloxane copolymer resin (component B) and 0.5 to 2.5 parts by weight of a polyolefin resin (component C).

The invention provides a hydrolysis-resistant and low-temperature-resistant PC/ABS (Polycarbonate/Acrylonitrile Butadiene Styrene) composite and a preparation method thereof. The PC/ABS composite comprises the following materials in parts by weight: 50-65 parts of PC resin, 20-30 parts of ABS, 5-10 parts of an MBS flexibilizer, 1-5 parts of LLDPE (Linear Low Density Polyethylene), 1-5 parts of SAM, 1-3 parts of a heat stabilizer, 0.5-1 part of antioxygen, 0.3-0.5 part of polytetrafluoroethylene, 0.5-1 part of a lubricant, and 0-3 parts of other assistants. Due to the linear structure of the LLDPE, the shrinkage property of the polytetrafluoroethylene (PTFE) and the compatibilization of the SAM, the interfacial compatibility of the LLDPE and the PC/ABS is improved, and the low-temperature impact resistance performance, the malleability and the tearing property of the composite are greatly improved; meanwhile, the composite has the characteristics of high hydrolysis resistance, high heat stability, excellent wear resistance and excellent chemical corrosion resistance, so that the application field of a PC/ABS alloy material is greatly expanded, and the composite has broad development and application prospects.

The invention provides a polyphenylether material and a preparation method thereof. The polyphenylether material comprises a main body resin, a toughening compound, a phosphatic organic substance and an assistant, wherein the main body resin is polyphenylether resin, and the toughening compound is an organosilicon-acrylate-styrene multipolymer. The polyphenylether material has the advantages of high melt index and excellent flame retardancy.

The invention relates to a nylon material of a pin-type composite insulator cap-shaped connector for a power grid power transmission and distribution line and a forming method. The nylon material comprises the following components in percentage by mass: 62%-66% of nylon resin, 28%-33% of glass fiber, 3%-6% of a toughening agent, 0.2%-0.5% of a main antioxidant, 0.2%-0.5% of an auxiliary antioxidant, 0.2%-0.5% of an ultraviolet absorbent, 0.2%-0.5% of a light stabilizer and 1%-3% of a wear-resistant additive, the viscosity of the nylon resin is 3.2 +/-0.01; the grafting rate of the toughening agent is 0.8 to 1.2%; the nylon resin is PA66 polyhexamethylene adipamide, PA6 polyamide 6 or a mixture of the PA66 polyhexamethylene adipamide and the PA6 polyamide 6. After polymerization processing,the material performance is excellent, the mechanical performance, the electrical performance, the environmental aging resistance, the high and low environmental temperature resistance and the material wear resistance of the composite product are excellent, and the safe use condition of the product is met.