20results about How to "Good reinforcing effect" patented technology

The invention relates to the technical field of coatings, and discloses a preparation process of a waterproof coating for roads and bridges, which comprises the following steps: reacting polyester polyol, an isocyanate monomer, 4-N, N-bis (2-hydroxyethyl) aminopyridine-2-formic acid and the like, and then adding water, nano cellulose, copper salt, a neutralizer, pigment and the like to obtain the waterproof coating for roads and bridges. According to the invention, copper ions are respectively coordinated with pyridine-2-formic acid of polyurethane and hydroxyl of nano-cellulose to play a role of a cross-linking agent, and the polyurethane and the nano-cellulose are subjected to ionic cross-linking, so that the interface bonding performance of the polyurethane and the nano-cellulose is improved, and the nano-cellulose has a better reinforcing effect; a paint film of the paint has higher pencil hardness, impact resistance and mechanical properties. Meanwhile, the waterproof and anti-corrosion performance is good, and good practical application is achieved in the fields of roads, bridges and the like.

The invention relates to the technical field of rubber materials, and discloses a flame-retardant silicon carbide ceramic rubber material and a preparation method thereof. The flame-retardant silicon carbide ceramic rubber material is prepared by taking methyl vinyl silicone rubber as a main base material and adding MIL-100 (Fe, Co) coated CSiCNS, modified mica powder and other auxiliaries, not only has excellent high temperature resistance and corrosion resistance of silicone rubber, but also has excellent wear resistance of a ceramic material; wherein the MIL-100 (Fe, Co)-coated CSiCNS is prepared by taking a silicon carbide nanosheet as a substrate for modification, and is used as an inorganic flame-retardant component in the substrate, so that the flame-retardant property of the rubber material is improved; the modified mica powder serving as a ceramic forming filler not only endows the matrix with a certain flame retardant property, but also can be subjected to melting and eutectic reaction with the silicone rubber at high temperature to form a hard ceramic body, so that the flame retardant property of the matrix is further improved.

The invention relates to anti-aging rubber and a preparation method thereof. The anti-aging rubber comprises the following raw materials in parts by weight: 60-90 parts of raw rubber A; the raw rubber A is nitrile rubber; 10-40 parts of raw rubber B; the raw rubber B is ethylene propylene diene monomer and / or ethylene propylene diene monomer; 90 to 120 parts of reinforcing filler; the reinforcing filler is a composition of carbon black and white carbon black; 5-8 parts of a rubber lubricant; 0.1 to 0.2 part of a coupling agent; 3-6 parts of a plasticizer; 5-8 parts of zinc oxide; 0.1 to 2.5 parts of sulfur; 1 to 2 parts of peroxide DCP; 1-3 parts of an accelerant; 1-3 parts of stearic acid; and 2-5 parts of an anti-aging agent. According to the aging-resistant rubber and the preparation method thereof, the design is reasonable, a raw rubber system provides basic performance of rubber, a reinforcing system enhances mechanical properties of the rubber, a vulcanization system ensures a cross-linked structure of the rubber, multiple auxiliaries enhance processability, stability and aging resistance of the rubber, and the aging-resistant rubber with good comprehensive performance is obtained.

The invention relates to the technical field of rubber vulcanization, and provides a rubber vulcanization accelerator as well as a preparation method and application thereof. The invention provides application of a rubber vulcanization accelerator to improvement of tensile strength and tear strength of rubber, and a preparation method of the rubber vulcanization accelerator comprises the following steps: acidizing lignin, and then mixing and reacting the acidized lignin with carbon disulfide under an alkaline condition; and carrying out heat treatment on a product obtained by the reaction to obtain the rubber vulcanization accelerator. Compared with the prior art, the rubber vulcanization accelerator disclosed by the invention has a relatively good vulcanization acceleration effect on rubber, also has a reinforcing effect, is an environment-friendly novel multifunctional rubber additive, and can be applied to production of rubber products.

The invention discloses a preparation method of white carbon black for a rubber base plate of a high-speed railway fastener system, and belongs to the field of preparation methods of white carbon black, the white carbon black comprises the following raw materials: sodium silicate, sulfuric acid, a nonionic active agent and a silane coupling agent, and the white carbon black is prepared by improving a manufacturing process and setting a specific temperature and a preparation mode. The nonionic active agent and the silane coupling agent can better form specific cooperation, steric hindrance among white carbon black particles is increased, chemical bonding of the white carbon black and the silane coupling agent is enhanced, the reaction efficiency is accelerated, and the reaction environment and stability are optimized, so that agglomeration of the white carbon black particles is prevented, the dispersion effect of the white carbon black in rubber is improved, and the service life of the rubber is prolonged. By setting a two-stage mixing flow rate, uniform primary particles are rapidly formed, gel is reduced, the good state of a reaction system is kept, the particles uniformly grow into balls, the action between the particles and a rubber matrix is enhanced, and the rubber cushion plate is more economical and environment-friendly.

The present invention relates to the technical field of rubber tire materials, and discloses a method for preparing an antistatic wear-resistant rubber tire material, wherein carboxyl-terminated nitrile rubber, graphene oxide, epoxidized polyester fiber, and a catalyst are added to an internal mixer, and natural rubber, zinc oxide, accelerator CZ, antioxidant RD, paraffin, stearic acid, and carbon black are added after mixing, sulfur is added after mixing, thin pass, lower sheet, and vulcanization are performed to obtain an antistatic wear-resistant rubber tire material. The carboxyl group on the surface of graphene oxide and the carboxyl-terminated nitrile rubber react with the epoxy group of the epoxidized polyester fiber, so that the graphene oxide, the polyester fiber, and the nitrile rubber undergo chemical bonding to form an organic-inorganic hybrid reinforcement system, which has a good reinforcing effect on natural rubber, and the graphene is evenly dispersed in the rubber tire material matrix to form a continuous conductive network, which reduces the volume resistivity and improves the electrical conductivity and antistatic performance.

The invention relates to the technical field of optical cable sheath materials, and discloses a preparation process of a weather-resistant flame-retardant sheath material and an optical cable thereof. 100 parts by weight of ethylene-vinyl acetate copolymer EVA resin, 15-30 parts by weight of methyl vinyl silicone rubber, 2-8 parts by weight of an EVA-based phosphorus-containing silicone oil flame retardant, 0.3-0.5 part by weight of a vulcanizing agent and the like are added into a torque rheometer for mixing; and then performing open milling, batch-out, thin passing, triangular packaging and vulcanization to obtain the weather-resistant flame-retardant sheath material. According to the EVA-based phosphorus-containing silicone oil flame retardant disclosed by the invention, a trioxa-phosphorus-heterobicyclic structure and polysiloxane contained in the EVA-based phosphorus-containing silicone oil flame retardant form a phosphorus-silicon flame-retardant system, so that the limit oxygen index of a sheath material is increased, the heat release rate peak value and the total heat release amount are reduced, and the flame retardant property is very good. And meanwhile, the EVA sheath material shows relatively high tensile strength and elongation at break, and has better mechanical properties.

The invention discloses a high-pressure-resistant gas storage cavern sealing composite material and a preparation method, and relates to the technical field of gas storage cavern sealing materials.The high-pressure-resistant gas storage cavern sealing composite material is prepared from a component A and a component B, the component A comprises the following components in parts by weight: 100 parts of epoxy resin, 40-50 parts of 4-tert-butylphenyl glycidyl ether, 10-20 parts of dioctyl phthalate, 2-5 parts of modified activated rubber powder, 1-2 parts of a coupling agent, 1-3 parts of nano SiO2 and 2-5 parts of an anti-aging agent; the component B is prepared from 15 to 20 parts of triethylene tetramine, 5 to 15 parts of 2, 4, 6-tri (dimethylaminomethyl) phenol, 2 to 4 parts of polyamide, 0.5 to 1 part of silicon-copper sealant and 3 to 5 parts of polydimethylsiloxane. According to the high-pressure-resistant gas storage cavern sealing composite material, the sealing performance and safety of a gas storage cavern can be enhanced, the problems that an existing traditional sealing material is poor in durability, poor in high pressure resistance, high in manufacturing cost and the like are solved, reliable guarantee is provided for safe and stable operation of underground gas storage facilities, and engineering investment is remarkably reduced.

The invention belongs to the technical field of sealing material preparation, and particularly discloses a high-temperature-resistant and high-pressure-resistant sealing material and a preparation method and application thereof, and the high-temperature-resistant and high-pressure-resistant sealing material comprises the following preparation raw materials: 65-85 parts of nitrile rubber, 15-35 parts of ethylene propylene rubber, 2-5 parts of a modifier, 30-50 parts of a reinforcing material, 5-12 parts of a plasticizer, 1-2.5 parts of a vulcanizing agent, 1-2.5 parts of an assistant crosslinking agent and 2-8 parts of an active agent. The nitrile rubber and the ethylene propylene rubber are used as main raw materials, and through the action of the modifier and the use of the reinforcing material, the prepared sealing material is excellent in comprehensive performance and has a relatively good application prospect.

The invention discloses a kettle shell plastic injection molding process and a high-temperature-resistant modification method. The kettle shell plastic injection molding process comprises the steps of preparation of a modified plastic raw material, drying pretreatment before injection molding, gas-assisted collaborative injection molding and stepped annealing post-treatment. The preparation raw materials comprise a butadiene-propenyl polymer, a polyester polyol prepolymer and the like, and plastic particles are obtained through raw material modification, mixing, dynamic vulcanization and melting granulation; after the particles are dried, a blank is formed through gas-assisted cooperative injection molding, stress is eliminated through stepped annealing, and finally a finished product is obtained. The problems of product deformation, mechanical attenuation, many forming defects, poor long-term reliability and the like in the prior art are effectively solved, the high temperature resistance, the mechanical strength, the forming precision and the anti-aging performance of the product are remarkably improved, the process is advanced, the practicability is high, and the service life of the product is prolonged.

The application discloses a carbon nanotube and carbon black composite conductive filler and a PVC conductive composite material and a preparation method thereof. The carbon nanotube and carbon black composite conductive filler comprises a composite of carbon nanotubes and carbon black obtained by mixing carbon nanotubes after surface grafting and carbon black after surface grafting through ball milling and grinding, and forms a conductive filler with a "grape cluster" structure. The structure utilizes the long-axis structure of the carbon nanotubes, prolongs the axial length of the carbon black, forms a rich conductive network, changes the point-like conduction of the carbon black into linear conduction, and after coupling, the conductive performance can be greatly improved.

The present invention relates to a silicone adhesive and a preparation method thereof. When used, the silicone adhesive is prepared by mixing component A and component B according to a volume ratio of 1:0.9-1.1: the component A is mainly prepared from the following components: α,ω-dihydroxy polydimethylsiloxane, terminal hydroxyl polybutadiene, polydimethylsilicone oil, and nano calcium carbonate; the component B is mainly prepared from the following components: polydimethylsilicone oil, α,ω-dihydroxy polydimethylsiloxane, waterproof filler, carbon black, fast-curing crosslinking agent, crosslinking curing agent, silane coupling agent, and catalyst. The invention overcomes the shortcomings of the existing single-component silicone adhesive that the curing is slow and requires a curing room, and the two-component silicone adhesive has poor bonding strength and water resistance to photovoltaic modules. The invention balances the reaction activity of the entire system, shortens the curing time, does not require a separate curing time, can achieve continuous production, and has better bonding strength and good water resistance through the combination of a fast-curing crosslinking agent bis-trialkoxysilylpropylaniline and a crosslinking curing agent prepared from a preferred component, and other components work synergistically.

The invention discloses composite calcium carbonate powder for rubber and a preparation method thereof, and the preparation method comprises the following steps: dissolving dipotassium phosphate, mixing with a modified nano calcium carbonate coating body, activating, mixing with thiolated chitosan in deionized water, and reacting under an alkaline condition to obtain a composite nano calcium carbonate coating body; dispersing the composite nano calcium carbonate coating body, mixing with a mixed solution of a methacrylic acid aqueous solution and a sodium hydroxide aqueous solution, and reacting with an aluminum chloride aqueous solution to obtain composite calcium carbonate powder; silicon dioxide, carboxymethyl cellulose and sulfydryl chitosan are compounded on a nano calcium carbonate matrix, the agglomeration of nano calcium carbonate is reduced, the reaction grafting capacity of nano calcium carbonate coated with silicon dioxide is improved, and through a layer-by-layer coating mode, the formed composite calcium carbonate powder is rich in surface groups, good in dispersity and good in mechanical property. The crosslinking density of the composite calcium carbonate powder and the rubber material is improved, the dispersion degree in the rubber is high, and the mechanical property of the rubber is better improved.

The utility model provides an anti-corrosion protection structure of a steel structure welding seam. The anti-corrosion protection structure is characterized in that an anti-corrosion protection layer is arranged at the welding seam; and the anti-corrosion protection layer is formed by impregnating carbon fiber cloth with epoxy resin. The epoxy resin has good adhesion and corrosion resistance and can be tightly attached to the surface of the steel to form a stable anti-corrosion protection layer. And the carbon fiber cloth has excellent mechanical property and reinforcing effect, and can enhance the strength and stability of the welding seam and the surrounding area thereof.

The application relates to the technical field of carbon fiber composite materials, and particularly discloses a unit layer base cloth for preparing a carbon fiber crucible preform, the carbon fiber crucible preform and a preparation method thereof. The unit layer base cloth disclosed by the application is integrally composed of an upper part of a rectangular structure layer and a lower part composed of n same petal-shaped structure layers connected in sequence, the petal-shaped structure layer comprises four arc segments; the lower part is formed by head-to-tail splicing in the weft direction to form an R angle and a bottom of the carbon fiber crucible preform, and the arc lines of two adjacent petal-shaped structure layers completely coincide at the junction. The application further provides a preparation method of the unit layer base cloth and a carbon fiber crucible preform prepared by using the unit layer base cloth. When the unit layer base cloth is used to prepare the carbon fiber crucible preform, the operation is simple, practical and safe, the phenomenon of ribbing at gaps and poor needling effect is greatly reduced, the hoop strength of the R bottom of the preform, the stability of the interlayer structure and the overall performance of the needling of the layers are ensured.

This invention relates to the field of rubber materials technology and discloses a green tire rubber material and its molding process. The green tire rubber material of this invention includes 70-90 parts of styrene-butadiene rubber, 10-30 parts of methyl vinyl silicone rubber, and 10-25 parts of stilbene-tetramethyldisiloxane-modified starch. The modified starch contains multiple benzene rings identical to those in styrene-butadiene rubber and siloxane structures identical to those in silicone rubber, which improves the compatibility between starch and styrene-butadiene rubber, as well as silicone rubber. Furthermore, during the vulcanization process, the alkenyl groups of the modified starch undergo vulcanization crosslinking reactions with the alkenyl groups of styrene-butadiene rubber and silicone rubber, further enhancing the bonding force between starch, styrene-butadiene rubber, and silicone rubber, giving starch a better reinforcing effect and significantly improving the tensile, tear, and other mechanical properties of the rubber material.

The present invention provides a modified organic silicon material and a rubber composition for new energy vehicle tires, and relates to the technical field of tires. The present invention uses vinyl-terminated siloxane polymers, white carbon black, diatomaceous earth, silane coupling agents, and acrylates as raw materials to prepare modified organic silicon materials for new energy vehicle tires. The obtained modified organic silicon material has the characteristics of good compatibility with rubber components, high mechanical properties, and good heat resistance. When used to prepare rubber tires, it can improve the mechanical properties and wear resistance of the tires, reduce heat generation, improve thermal conductivity, and improve aging resistance.

This invention relates to the field of silicone rubber technology and discloses a method for preparing highly transparent extruded precipitated silicone rubber. The invention involves adding silicone rubber compound and modified titanium dioxide to a Banbury mixer for mixing, then adding a vulcanizing agent, mixing again, and finally extruding the compound in an extruder to form a high-transparency extruded precipitated silicone rubber. The organosilicon modifier contains a large number of carboxyl groups, effectively achieving the coating modification and surface modification of titanium dioxide, which helps reduce titanium dioxide agglomeration, improves the compatibility between titanium dioxide and the polysiloxane molecular chains of silicone rubber, and ensures that it is uniformly dispersed in the silicone rubber matrix, providing better reinforcement. The tensile properties and tear strength are significantly improved, resulting in silicone rubber with high transparency and good mechanical properties.

The invention belongs to the technical field of silicone rubber, and discloses a low-density heat-conducting pouring sealant as well as a preparation method and application thereof. The low-density heat-conducting pouring sealant comprises a component A and a component B, the component A comprises the following components in parts by weight: 80-100 parts of side vinyl silicone oil and / or end side vinyl silicone oil; 100 to 150 parts of vinyl MQ silicon resin coated modified heat-conducting flame-retardant filler; 0.005 to 0.02 part of a catalyst; the component B comprises the following components in parts by weight: 80-100 parts of side vinyl silicone oil and / or end side vinyl silicone oil; 100 to 150 parts of vinyl MQ silicon resin coated modified heat-conducting flame-retardant filler; 10-30 parts of hydrogen-terminated silicone oil; 0.05 to 0.2 part of an inhibitor; and 0 to 0.2 part of toner. The low-density MQ silicon resin is adopted to perform coating modification on the filler, so that good heat-conducting property and mechanical property can be achieved under the condition of reducing the adding amount of the filler, and the density of the pouring sealant is remarkably reduced.

The invention relates to the field of sealants, in particular to a high-transparency neutral silicone adhesive and a preparation method thereof. According to the high-transparency neutral silicone adhesive provided by the invention, the filler is modified, and the manner of coating the organic microspheres with the silicon dioxide is adopted, so that compared with the traditional white carbon black filler or filler with the silicon dioxide coated with an organic system, the high-transparency neutral silicone adhesive has the advantages that the size of the filler is larger; and better reinforcing performance, transparency and flowability are also provided.