31results about How to "Improved thermo-oxidative aging performance" patented technology

The invention relates to an anti-impacting anti-ageing modified polypropylene material and a preparation method thereof and aims at providing the anti-impacting anti-ageing modified polypropylene material which has basic physical characteristics of polypropylene and simultaneously has improved anti-impacting performance and good anti-ageing performance. The material comprises, by weight, 65-85% of polypropylene, 5-25% of inorganic fillers, 0.3-1.5% of antioxidant, 0.2-1.0% of light stabilizer, 0.2-1.0% of ultraviolet absorber, 5-15% of flexibilizer, 5-15% of compatilizer and 0.2-1.0% of coupling agent. Experiment results show that the material can achieve the purposes, and products can be widely applied to the fields such as electronics and electrics, automobile and household appliances, communication devices and building materials.

The invention discloses a high-strength and high-temperature-resistant silicon rubber composite comprising the raw materials in parts by weight: 100 parts of silicon rubber, 8-21 parts of ethylene-propylene-diene rubber, 4-13 parts of polyurethane, 10-28 parts of fumed silica, 5-11 parts of carbon nanometer tubes, 1-8 parts of graphite, 4-13 parts of nanometer calcium carbonate, 3-15 parts of micairon oxide, 6-11 parts of montmorillonite, 2-9 parts of coal ash, 3-10 parts of calcium sulfate whiskers, 0.5-2.8 parts of zirconium fluoride, 0.9-2 parts of vulcanizing agent, 0.5-2 parts of methylsilicone oil, 1-2.5 parts of hexamethylcyclotrisilazane, 0.5-3.8 parts of vinyl tris(2-methoxyethoxy) silane and 1-2.5 parts of tetraethyl orthosilicate. The high-strength and high-temperature-resistant silicon rubber composite provided by the invention is good in high temperature resistance and strength and excellent in toughness and ageing resistance.

The invention belongs to the field of rubber tire processing, and particularly discloses an application of lignin in preparation of radial tires. The lignin can completely or partially replace resorcinol, and meanwhile, the lignin can completely or partially replace an anti-aging agent. Compared with the prior art, resorcinol is replaced or partially replaced by biomass-derived lignin or modifiedlignin, so that the requirements of cost reduction, environmental protection and no toxicity are met. Especially, the demethylated modified lignin can effectively enhance various properties of the rubber. In addition, lignin is used as a thermo-oxidative aging agent to improve the thermo-oxidative aging performance of rubber products, and the aging change rate is obviously lower than that of radial tires without lignin.

The invention discloses a high-strength and anti-impacting natural rubber cable sheathing material. The high-strength and anti-impacting natural rubber cable sheathing material is prepared from the following raw materials: natural rubber, polyvinyl chloride, low-density polyethylene, an ethylene-vinyl acetate copolymer, zinc oxide, stearic acid, sulfur, high-abrasion-resisting furnace black, carbon nanotubes, nano calcium carbonate, montmorillonoid, zirconium diboride, calcium sulfate whiskers, lignocellulose short fibers, cotton short fibers, an accelerant M, an accelerant BZ, a poly-3-hydroxybutyrate-4-hydroxybutyrate, epoxy soybean oil, an anti-aging agent RD, an anti-aging agent MB, p-aminodiphenyl amine, gamma-epoxypropoxy propyltrimethoxysilicane and vinyltriethoxysilane. The high-strength and anti-impacting natural rubber cable sheathing material disclosed by the invention is high in strength, good in anti-impacting performance, excellent in anti-aging performance and long in service life.

The invention discloses a thermal-oxidizing-aging resisting polypropylene composite. The thermal-oxidizing-aging resisting polypropylene composite comprises the following components in percentage by weight: 30%-85% of polypropylene, 0-10% of flexibilizer, 2%-10% of compatilizer, 10%-40% of filling agent, 0.1%-0.5% of nucleating agent, 1%-10% of load type functional agent and 0.2%-1.0% of processing agent. Due to the nucleating agent, the polypropylene spherocrystal is refined, the crystallization is uniform and regular and the degree of crystallinity is increased, so that the lattice defect of a substrate is avoided effectively, and the oxygen is prevented from dispersing to the inner part from the surface of the composite freely; due to the compatilizer, the interface bonding force of the polypropylene and the filling agent is improved, so that two phase interfaces are combined tightly, the and the oxygen is prevented from dispersing to the inner part from the surface of the composite freely, and the thermal-oxidizing-aging resistance is improved; and the load type functional agent solves the problem of dispersibility and solvent resistance of an antioxidant and a light stabilizer. The thermal-oxidizing-aging resisting polypropylene composite has a simple preparation method, is high in thermal-oxidizing-aging resisting efficiency and is widely applied to the field of household appliances such as electric cookers, microwave ovens, washing machines, dish-washing machines and the like.

The invention belongs to the technical field of building materials, and particularly relates to a preparation method of a composite polyurethane waterproof coating. The method comprises the followingsteps: firstly, preparing organic silicon microcapsules by taking polyvinyl alcohol and maltodextrin as wall materials and organosilane as a core material; then mixing tetraethoxysilane and calcium nitrate to perform a reaction, and preparing tricalcium silicate self-made filler by a sol-gel method; then mixing zinc nitrate, ferric nitrate and tetrabutyl titanate and carrying out a reaction to generate nano metal oxide filter residues in the presence of ammonia water; and finally, preparing the waterborne polyurethane emulsion. The polyurethane waterproof paint has the advantages of great mechanical ultraviolet aging resistance, thermo-oxidative aging resistance and waterproofness, durable waterproofness and wide application prospects.

The invention discloses a styrenic thermoplastic elastomer, which is mainly prepared by using a styrenic thermoplastic elastomerglue solution, extending oil and antioxygen as raw materials and by mixing and refining. The elastomer consists of 2,000 to 3,000 weight parts of styrenic thermoplastic elastomerglue solution, 150 to 250 weight parts of extending oil and 1,000 to 5,000ppm of antioxygen. The antioxygen at least comprises compound hindered phenol antioxygen. The invention also discloses the preparation method of the styrenic thermoplastic elastomer, which is very antioxidant and environment-friendly.

The invention discloses a long-term heat and oxidation aging resistant polypropylene compound prepared in percentage by weight: 52%-89% of polypropylene resin, 10%-40% of inorganic filler, 0.1%-1% of beta nucleating agent, 0.5%-5% of stem grafting assistant, 0.2%-1% of antioxygen and 0.2%-1% of processing agent. A preparation method comprises the following steps of: evenly mixing each component, putting in a twin screw extruder for extrusion, enabling a temperature of the extruder to be 190-210 DEG C, enabling a rotating speed to be 50-400 circle / minute, cooling extrusion objects by using water, conducting sized dicing and obtaining the compound. The compound prepared by the preparation method has an excellent comprehensive mechanical property, has long-term heat and oxidation aging resistant characteristics, cannot pulverize after baking for 3000 hours in a 150-DEG C forced convection oven, and is widely applied to heat and oxidation aging resistant components of household appliances.

The invention relates to an anti-impacting anti-ageing modified polypropylene material and a preparation method thereof and aims at providing the anti-impacting anti-ageing modified polypropylene material which has basic physical characteristics of polypropylene and simultaneously has improved anti-impacting performance and good anti-ageing performance. The material comprises, by weight, 65-85% of polypropylene, 5-25% of inorganic fillers, 0.3-1.5% of antioxidant, 0.2-1.0% of light stabilizer, 0.2-1.0% of ultraviolet absorber, 5-15% of flexibilizer, 5-15% of compatilizer and 0.2-1.0% of coupling agent. Experiment results show that the material can achieve the purposes, and products can be widely applied to the fields such as electronics and electrics, automobile and household appliances, communication devices and building materials.

The invention provides a vulcanized rubber jacket for transmission belts. The vulcanized rubber jacket comprises, by weight, 95 parts of brominated butyl rubber, 5 parts of chloroprene rubber, 30-60 parts of reinforcing agents, 1-5 parts of homogenizing agents, 5-10 parts of tackifying resin, 5-10 parts of vulcanizing phenolic resin, 1-3 parts of microcrystalline wax, 1-3 parts of surface lubricants, 1-3 parts of anti-aging agents, 1-3 parts of accelerators, 0.2-1 part of stearic acid, 0.5-2 parts of magnesium oxide and 5 parts of zinc oxide. The vulcanized rubber jacket has the advantages of excellent air tightness, anti-aging property, permanent deformation resistance and thermal-oxidative aging resistance, long service life and low service cost of products.

The invention discloses a high-strength and anti-impacting natural rubber cable sheathing material. The high-strength and anti-impacting natural rubber cable sheathing material is prepared from the following raw materials: natural rubber, polyvinyl chloride, low-density polyethylene, an ethylene-vinyl acetate copolymer, zinc oxide, stearic acid, sulfur, high-abrasion-resisting furnace black, carbon nanotubes, nano calcium carbonate, montmorillonoid, zirconium diboride, calcium sulfate whiskers, lignocellulose short fibers, cotton short fibers, an accelerant M, an accelerant BZ, a poly-3-hydroxybutyrate-4-hydroxybutyrate, epoxy soybean oil, an anti-aging agent RD, an anti-aging agent MB, p-aminodiphenyl amine, gamma-epoxypropoxy propyltrimethoxysilicane and vinyltriethoxysilane. The high-strength and anti-impacting natural rubber cable sheathing material disclosed by the invention is high in strength, good in anti-impacting performance, excellent in anti-aging performance and long in service life.

The invention discloses a material of a rubber part of a damping spacer for an ultra-high voltage transmission line and a preparation method thereof, and belongs to the fields of rubber materials and the preparation method thereof. The material comprises the following components in percentages by weight: 50-55% of ethylene propylene diene rubber, 27-32% of high abrasion-resistant carbon black, 5-10% of acetylene carbon black, 5-8% of naphthenic oil, 2.5-3.5% of zinc oxide, 0.3-0.7% of ultraviolet light absorber, 1-1.5% of dicumyl peroxide, 0.2-0.5% of sulfur and 0.1-0.3% of tetramethylthiuram disulfide. The preparation method comprises the following preparation steps of mixing a master batch, sulphureting the master batch, forming and vulcanizing. The prepared rubber part of the damping spacer for the ultra-high voltage transmission line has the advantages of excellent physical and mechanical properties, excellent weather resistance, ozone resistance and ultraviolet radiation aging resistance performance, higher electrical conductivity, moderate damping property, high elasticity and low compression permanent deformation performance. The service life of a product can reach 25-30 years.

The invention discloses a styrenic thermoplastic elastomer, which is mainly prepared by using a styrenic thermoplastic elastomerglue solution, extending oil and antioxygen as raw materials and by mixing and refining. The elastomer consists of 2,000 to 3,000 weight parts of styrenic thermoplastic elastomerglue solution, 150 to 250 weight parts of extending oil and 1,000 to 5,000ppm of antioxygen. The antioxygen at least comprises compound hindered phenol antioxygen. The invention also discloses the preparation method of the styrenic thermoplastic elastomer, which is very antioxidant and environment-friendly.

The invention provides a polyolefin material with high thermal shrinkage resistance, high toughness and thermo-oxidative aging resistance as well as a preparation method and application thereof. The polyolefin material comprises the following components in parts by weight: 17-19 parts of LLDPE (Linear Low Density Polyethylene), 15-20 parts of EAA (Ethylene Acrylic Acid), 5-10 parts of POE (Polyolefin Elastomer), 35-50 parts of an ammonia modified halogen-free flame retardant, 3-10 parts of a compatilizer, 3-5 parts of a dispersing agent, 0.2-0.8 part of an antioxidant and 0-2 parts of other additives, and in the ammonia modified halogen-free flame retardant, the halogen-free flame retardant is one or a combination of two of magnesium hydroxide or aluminum hydroxide. Under the interaction of the ammonia-modified aluminum hydroxide or magnesium hydroxide halogen-free flame retardant and EAA and POE in a resin matrix, the heat shrinkage resistance, toughness and thermo-oxidative aging resistance of the polyolefin material can be improved at the same time, and the polyolefin material can be used for a long time in a higher temperature environment as a cable protection material.