216results about How to "Improve low temperature impact resistance" patented technology

The invention discloses nano calcium carbonate polypropylene composite material. The composite material comprises 100 portions of polypropylene resin, 1 to 15 portions of nano calcium carbonate, 1 to 20 portions of elastomer, and 0.1 to 1 portion of stabilizing agent. The composite material is prepared by method of melt compounding by adopting an internal mixer or double screw extruder. Good rigidity is kept when the toughness of the composite is obviously improved; the composite has good cold impact resistance performance, and is applicable to injection moulding production of automobile parts, i.e. bumper, mudguard, etc.

The invention relates to a cold-resistance super tough nylon polyolefin alloy, which is prepared by the following raw materials in part by mass: 45 to 75 parts of polycaprolactam, 15 to 30 parts of polyolefin, 4.8 to 9.7 parts of compatilizer, 5 to 15 parts of flexibilizer, 0.1 to 0.3 part of antioxygen and 0.1 to 0.5 part of assistant. The invention also provides a method for preparing the cold-resistance super tough nylon polyolefin alloy. In the method, polycaprolactam, polyolefin and the like are used as basic materials, maleic anhydride-grafted polyolefin is used as the compatilizer, maleic anhydride-grafted POE is used as the flexibilizer, and the double screw extrusion blending is used to prepare the cold-resistance super tough nylon polyolefin alloy. The cold-resistance super tough nylon polyolefin alloy prepared by the method is low in cost, high in comprehensive performance and high in low temperature and impact resistance.

The invention discloses a solar energy rear panel and a preparation method of the solar energy rear panel. The solar energy rear panel comprises an inner surface layer, a core layer and an outer surface layer from inside to outside. By a mass rate, the inner surface layer is 10%-20%, the core layer is 20%-40%, and the outer surface layer is 40%-60%. The inner surface layer and the outer surface layer are made of polyamide resin, fillings and additive, and the core layer is made of the modified polypropylene resin composition. The modified polypropylene resin composition comprises the following components: 100 parts of polypropylene resin, 5-50 parts of graft polyethylene, 0-2.5 parts of additive and 0-100 parts of fillings. Meanwhile, the invention discloses the novel modified polypropylene resin composition used for the solar energy rear panel. Due to the novel modified polypropylene resin composition, a final product obtained has good low temperature resistance and impact resistance, meanwhile anti-aging performance and especially has performance of humidity resistance and resistance to aging. The solar energy rear panel prepared by the novel modified polypropylene resin composition is better than other rear panels in terms of water absorption, water vapor permeability, and interlaminar peeling and has excellent electrical insulating property. A shrinking rate, hot air aging and insulation property required by the solar energy rear panel are met, and the novel modified polypropylene resin composition can be used for solar energy battery components manufacturing .

This invention relates to a hard and its preparation method. The feature is that it contains six potassium titanate crystal whiskers, hard chlorethylene tube made by materials in this invention has good low temperature proof capability, wear resistance and corrosion stability.

The invention relates to a high-weather-resistance acrylate resin composition and a preparation method thereof. The raw materials of the high-weather-resistance acrylate resin composition comprise the following components in part by weight: 10 to 30 parts of acrylate rubber powder 1, 10 to 30 parts of acrylate rubber powder 2, 30 to 60 parts of SAN resin 1, 5 to 20 parts of heat-resistant modifier, 5 to 15 parts of weather-resistant master batch, 0.3 to 3 parts of lubricant and 0.05 to 0.5 part of antioxidant. The preparation method comprises the following steps of: stirring the raw materials except the weather-resistant master batch to obtain a mixture; adding the mixture from a main feed inlet of a double-screw extruder, and adding the weather-resistant master batch from a side feed inlet; and extruding and pelleting the raw materials by the double-screw extruder to obtain a sample. The high-weather-resistance acrylate resin composition prepared by the method has higher heat resistance, low-temperature impact resistance, weather resistance, excellent size stability and processing property, and is particularly suitable for automobile exterior trim parts, such as radiator grilles, rear-view mirrors, license plates, central pillar plates, outdoor triangular blocks and the like, with high requirements on weather resistance, heat resistance and low-temperature impact resistance.

Method of preparing thermoplastic elastomer compound material and product thereof, applying post forming technics. The post forming technics is: first prepare the mold core by the method of injection molding or compression molding; then put the mold core into the mould and produce product with mold core by the compression molding method, taking the mold core out of the product by mechanical crushing, getting the product of hollow thermoplastic elastomer compound material. The post forming method includes following steps: 1) preparing the mold core by the injection molding of the compression molding method; 2) putting the mold core into the mould and producing product with the mold core by the injection molding method; 3) taking the mold core out of the product by mechanical crushing to get the hollow product. 4) the crushed mold core can be reclaimed for recreating use. The thermoplastic elastomer product prepared by the invention provided moulding preparation method is in formula (in mass parts proportioning): thermoplastic elastomer 100parts; thermoplastic plastics 1-50 parts; anti-oxidant 0.5-10 parts; ultraviolet absorbent 0.5-10 parts; lubricants 0.1-5.0 parts.

The invention discloses an extrusion type solar backboard. The extrusion type solar backboard comprises an inner layer, a middle layer and an outer layer from inside to outside in sequence, wherein the mass ratio of the inner layer to the middle layer to the outer layer is (10-40):(40-80):(10-40). The total thickness of the extrusion type solar backboard is 0.1-0.6 mm. By adding high-rigidity polypropylene to the inner layer, cohesive force between the backboard and an adhesive film is guaranteed, and interlayer cohesive force between the backboard and a polypropylene material of the middle layer is improved; meanwhile, by adding polyethylene or copolymers thereof to the material of the middle layer and the outer layer to enable the middle layer and the outer layer to be well bonded with polyethylene in the material of the inner layer, interlayer cohesive force and low-temperature impact resistance of the backboard are improved.

The invention discloses a low temperature impact-resistant polypropylene composition. The low temperature-resistant impact-resistant polypropylene composition comprises, by weight, 40 to 75 parts of polypropylene resin, 5 to 20 parts of a hydrogenated styrene-butadiene block copolymer SEBS and 5 to 25 parts of a polyolefin elastomer POE. Through use of the hydrogenated styrene-butadiene block copolymer SEBS and the polyolefin elastomer POE in specific weight contents in the low temperature-resistant impact-resistant polypropylene composition, the impact resistance and low temperature impact resistance of the composition are improved. A sample prepared from the composition has Charpy notched impact strength of greater than 5.0 KJ/m<2> after standing at -30 DEG C for 4h and has good rigidity.

The invention relates to a production method of modified red mud complexed polyvinyl chloride colorized rigid plastic. The method is characterized in that: graded red mud with a specification of -800 meshes is modified by using a titanate coupling agent; 35-45 parts of the modified red mud, 100 parts of polyvinyl chloride, 5-10 parts of an impact modifier, 3-5 parts of a stabilizing agent, and 0.2-0.8 parts of a lubricating agent are subject to high-speed mixing, melt extrusion and filming, such that the colorized rigid plastic is obtained. According to the invention, red mud is subject to a modification treatment, such that the compatibility of the red mud and polyvinyl chloride is substantially improved. When the plastic is subject to the filming treatment, a monotonic brownish red color of the red mud complexed polyvinyl chloride substrate plastic is changed, a woody pattern is provided, the color is diversified, and the plastic is provided with a good appearance.

The invention discloses a preparation method of a boron-containing seamless pipeline for marine petroleum and natural gas exploitation, which comprises the following steps: a) adopting, smelting and casting waste steel, pig iron and ingredients to obtain a pipe blank, wherein the pipe blank surely comprises the following chemical elements by weight percentage: 0.09-0.19 percent of C, 0.23-0.38 percent of Si, 0.9-1.7 percent of Mn, 0.0015-0.0025 percent of B, 0.01-0.07 percent of Nb, not greater than 0.012 percent of P, not greater than 0.007 percent of S, and Fe and other unavoidable impurities in balancing amount; b) performing heat treatment of the pipe blank; c) then rolling; d) finally obtaining the boron-containing seamless pipeline for the marine petroleum and natural gas exploitation via the heat treatment and detection. The pipeline prepared by the preparation method is high in tensile strength, good in welding performance, excellent in resistance to corrosion of brine and an acid environment and good in low-temperature impact resistance, and has the characteristic of high toughness, and the low-temperature impact resistance can reach 100 J at 70 DEG C below zero.

The invention discloses a supernylon 6 alloy and a method for preparing supernylon 6 alloy by means of in-situ reaction compatibilization. The method includes mixing nylon 6 and ethylene with octylene copolymer, trigger and maleic anhydride and preparing supernylon 6 alloy high in tenacity, resistant to low temperature and low water absorption in a double-parallel-screw extruder. The raw materials of the supernylon 6 alloy includes, by weight, 55-95 parts of nylon 6, 5-45 parts of POE (polyolefin elastomer), 0.01-1 part of trigger, 0.1-4 parts of maleic anhydride and 0.1-4 parts of HDPE-g-MAH (high-density polyethylene-g-maleic anhydride), wherein the trigger is organic peroxide including hydroperoxide, alkyl peroxide, dibenzoyl peroxide, lipoperoxide and peroxide carbonate. The supernylon 6 alloy is excellent in comprehensive performance, high in impact strength of notches, resistant to low temperature and impact, low in water absorption and easy to popularize and apply, technique process is shortened, and production efficiency is improved.

The invention discloses a low-temperature impact resistance PP-R tubing and a preparation method thereof. The tubing is composed of following components in percentage by weight: 69 to 94.9% of random copolymerized polypropylene, 5 to 30% of polypropylene block copolymer (PPB), and 0.1 to 1.0% of beta-crystal nucleating agent. The preparation method comprises following steps: mixing random copolymerized polypropylene, block copolymerized polypropylene and beta-crystal nucleating agent according to the ratio mentioned above in a mixer for 2 to 5 minutes; subjecting the mixture to an extrusion granulation treatment by using a double screw extruder at the temperature of 170 to 220 DEG C, thus obtaining a composite material of PP-R/PP-B; then subjecting the composite material to an extrusion molding treatment, and obtaining the low-temperature impact resistance PP-R tubing. The PP-R tubing, which is prepared through mixing PP-R powder material and PP-B powder material and adding a certain amount of beta-crystal nucleating agent, has a prominent improved low-temperature impact resistance ability and good internal pressure resistance performance.

The invention discloses a boron-containing seamless pipe line pipe for ocean oil and gas exploitation. The boron-containing seamless pipe line pipe is characterized by comprising the following chemical elements by weight percent: 0.09 to 0.19 percent of C, 0.23 to 0.38 percent of Si, 0.9 to 1.7 percent of Mn, 0.0015 to 0.0025 percent of B, 0.01 to 0.07 percent of Nb, less than or equal to 0.012 percent of P, less than or equal to 0.007 percent of S and the balance of Fe and unavoidable impurities. The boron-containing seamless pipe line pipe is high in tensile strength, good in welding property, excellent in salt water and acid environmental corrosion resistance and good in low-temperature impact resistance, the low-temperature impact resistance can reach 100J under the condition of minus 70 DEG C, and the boron-containing seamless pipe line pipe has the characteristic of high flexibility; by adopting the way for combining hot rolling and tempering heat treatment, the strength can reach the grade of more than 80ksi.

The invention belongs to the technical field of organic chemistry and relates to a preparation method of a methyl tin heat stabilizer. The method comprises the following two steps: a) preparation of a methyl tin chloride intermediate: using tin, chloromethane and stannic chloride to perform alkane halogenation reaction so as to obtain the methyl tin chloride intermediate, and adding water for absorption so as to obtain a methyl tin chloride aqueous solution; and b) esterification-condensation reaction: adding MEO, sodium sulfide and ammonia water in the aqueous solution of methyl tin chloride to perform esterification-condensation reaction, and dewatering after fully reacting to obtain a methyl tin heat stabilizer product. The whole process of the preparation method is easy to control, and the cost is low; the methyl tin heat stabilizer product obtained by the method provided by the invention has an excellent heat stabilizing effect and can completely displace lead salt and cadmium heat stabilizers; and the product has the advantages of linear dosage control performance, low dosage and obviously lowered formula cost, and can be widely used in the manufacturing and processing fields of the PVC (polyvinyl chloride) plastic products.

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.