48results about How to "Small viscosity-temperature coefficient" patented technology

The invention discloses a production technology of a medical fabric. The technology comprises the following steps of grey fabric weaving, desizing, drying, splashing and sizing, calendering treatment, and coating of a double-sided coating, wherein the calendered surface of the fabric is coated with a PU resin coating with water pressure resistance; the PU resin coating is divided into a PU polyether two-component base material and a PU one-component fabric for separate coating; after the calendered surface is coated, the fabric is dried through high-temperature oven until being rolled up, and the other side of the fabric is coated with an organic silicone coating, and high-temperature drying is carried out to obtain the medical fabric. The tissue style characteristics of the woven fabric are integrated, and coating finishing is carried out on the front and reverse sides of the fabric, so that the fabric has the characteristics of being waterproof, easy to decontaminate and high in tenacity, and the production technology is suitable for the medical fabric.

The invention provides oxidation resistant dimethyl silicon oil based magnetic fluid and a preparation method thereof; the dimethyl silicon oil based magnetic fluid is prepared by nano-magnetic particles, a surface modifier and carrier fluid, and the carrier fluid is the dimethyl silicon oil. The preparation method of the dimethyl silicon oil based magnetic fluid comprises the following steps: preparing the nano-magnetic particles; treating the nano-magnetic particles in an activated way; preparing the nano-magnetic particles which are modified by the surface modifier; adding the modified nano-magnetic particles which are purified into methylene dichloride, dispersing and filtering the mixture to obtain the methylene dichloride based magnetic fluid; adding the magnetic fluid into the dimethyl silicon oil to be stirred and dispersed, heating the mixture and maintaining the temperature between 50 and 90 DEG C, separating and precipitating the mixture to obtain the dimethyl silicon oil based magnetic fluid. The dimethyl silicon oil based magnetic fluid in the invention has the advantages of high stability, low temperature resistance and high temperature resistance. The preparation method is simple, high in efficiency and low in requirement on equipments, thus being easy to be applied in various fields and having wide application prospect.

The invention discloses a graphene reinforced organic silicon heat-conductive material. The material is prepared from 15-35 parts of organic silicon resin, 25-55 parts of a heat-conductive agent, 1-7 parts of graphene, 0.1-2 parts of a platinum catalyst, 0.1-2 parts of hydrogen-containing silicone oil, 3-11 parts of a coupling agent, 0.5 parts of a flame retardant and 0-3 parts of a release agent. According to the invention, the graphene, the heat-conductive agent and the organic silicon resin are combined in a certain proportion, and the coupling agent, the hydrogen-containing silicone oil curing agent or other auxiliaries are added to form a formula, so that the heat conducting performance of the organic silicon material can be improved, the mechanical performance of the organic silicon material is improved, and the heat conducting performance of the product is further improved due to addition of the graphene, surfaces of the heat-conductive agent particles can be completely covered by the coupling agent due to the surface treatment mode of the heat-conductive agent in the preparation process, the compatibility of the heat-conductive agent and the organic silicon resin can be improved, and a high-quality high-performance product can be obtained.

The invention relates to a waterproof coating, in particular to a waterproof coating of a carton, which comprises the following components in weight part: 30-120 parts of paraffin micro-emulsion, 50-90 parts of simethicone, and 4-8 parts of emulsifier. The waterproof coating is prepared according to a method as follows: (1) heating the paraffin micro-emulsion to 50-180 degree C; (2) adding simethicone and stirring for 0.5-3 hours; and (3) adding the emulsifier, stirring at a high speed for 10-40 minutes, and cooling to the room temperature. The waterproof coating of the carton, disclosed by the invention, has no pollution on the human body and the environment, can be combined with the base material firmly, and has excellent waterproof property.

The invention discloses a crystal whisker reinforced organic silicon heat conducting material and a preparation method thereof. The crystal whisker reinforced organic silicon heat conducting material is prepared from organic silicon resin, heat conducting insulating filler, crystal whiskers, a platinum catalyst, hydrogen-containing silicon oil, a coupling agent and other additives which are subjected to processes such as surface treatment, vacuum smelting and rolling. By adding the inorganic crystal whiskers and the heat conducting insulating filler, the heat conductivity coefficient of the organic silicon material can be increased, the mechanical properties of the organic silicon material can be improved as well, and the organic silicon material has better toughness and more balanced mechanical properties and can be widely applied to electronic heat conduction fields of electrons, automobiles, LED lamps and the like.

The invention discloses a high-performance heat conduction material. The high-performance heat conduction material contains organic silicon resin, hexagonal boron nitride, aluminum oxide, graphene, platinum catalyst, hydrogen-containing silicone oil with hydrogen content of 0.5 to 0.8 percent, silane coupling agent, organosiloxane surface modifier, organic silicone oil and antioxidant 168; the organic silicon resin is low in surface tension, small in viscosity-temperature coefficient, high in compressibility and high in gas permeability, and the hexagonal boron nitride is high in precision and excellent in heat conduction performance and heat radiation performance, so that when the hexagonal boron nitride material is used for preparing an LED heat radiator, a high effect of heat resistance transfer and heat radiation for the LED can be realized; the hexagonal boron nitride and the aluminum oxide are used as heat conduction fillers, so that the cost performance is high; the graphene and the heat conduction fillers are combined with organic silicon resin in the formula, so that the reaction performance of the hexagonal boron nitride in the preparation process can be enhanced through the surface modifier, the compatibility and mechanical properties among the materials can be coordinately improved by virtue of the coupling agent, hydrogen-containing silicone oil and other additives, and a product with high quality and high performance can be obtained.

The invention relates to a true triaxial sand fracturing testing machine, which comprises a confining pressure system and an injecting system, wherein the injecting system comprises a first fracturing fluid container, a second fracturing fluid container and a piston container; two piston sheet baffle plates are arranged in the piston container. A true triaxial sand fracturing testing method comprises the following steps that stirring is performed in the second fracturing fluid container to form sand-carrying fracturing fluid; prepositive fracturing fluid is injected into the first fracturing fluid container; the prepositive fracturing fluid and the sand-carrying fracturing fluid are respectively injected into a middle cavity and an upper cavity of the piston container by pressure; through a first constant-pressure constant-speed plunger pump and/or a second constant-pressure constant-speed plunger pump, water is discharged into a lower cavity of the piston container; the prepositive fracturing fluid, the sand-carrying fracturing fluid and displacement fracturing fluid sequentially enter a downhole core for fracturing; after the fracturing is finished, the downhole core is taken out; the crack expanding condition is observed. The technical scheme is simple and is easy to understand; the operation is convenient and fast; the unified control on the confining pressure system and the injecting system can be realized; the fracturing fluid replacement is convenient.

The invention discloses a mineral oil defoaming agent and a preparation method thereof, and belongs to the technical field of fine chemical auxiliaries. The mineral oil defoaming agent provided by theinvention comprises the following components in parts by weight: 3-10 parts of hydroxyl-terminated polydimethylsiloxane; 5-20 parts of hydrophobic silicon dioxide; 40-80 parts of hydrocarbon oil; 10-35 parts of a defoaming coagent; 5-15 parts of a surface active emulsifier; and 1-6 parts of hydroxy acrylic resin. By adopting the mineral oil defoaming agent prepared by the invention, not only arethe polymerization, steam stripping and filling of harmful foam during a styrene-butadiene latex production process effectively inhibited, but also the effective control on oil shrinkage, pinhole, fisheye and foam inhibition of a subsequent coating is realized; at the same time, the mineral oil defoaming agent has the advantages of good stability, less addictive amount and the like.

The invention discloses a heat shrinkable casing pipe. The casing pipe comprises the following components in parts by weight: 50-70 parts of an ethylene-vinyl acetate copolymer, 30-50 parts of polyethylene, 5-15 parts of an ethylene-octylene copolymer, 2-5 parts of a compatilizer, 50-100 parts of an inorganic filler or a flame retardant, 5-10 parts of a lubricant, 1-3 parts of a composite antioxidant and 0-3 parts of color master batches. The casing pipe provided by the invention has a self-adhesion prevention effect, and even when the heat shrinkable casing pipe is used in batches, and used in a high-temperature machining state or other high-temperature environments, the phenomena of mutual adhesion or adhesion with metal materials which is in contact with the casing pipe can be avoided,so that the production efficiency is ensured and the appearance quality of products is prevented from being damaged.

The invention discloses an anti-track uvioresistant ADSS optical cable jack material which comprises the following raw materials by weight part: 65-70 parts of high density polyethylene resins, 15-20 parts of ethylene acrylic copolymers, 9-10 parts of polyethylene grafting materials, 5-6 parts of polydimethylsiloxane, 15-20 parts of magnesium hydrate, 5.0-5.5 parts of carbon black master batches, 0.5-1.0 part of ultraviolet light absorber and 0.5-1.0 part of antioxidant. In a preparation process, the raw materials are put into a high-speed mixing machine and are uniformly mixed, and then are continuously extruded by a double-screw extruder for two times, and are cooled, cut into grains and dried, so that the jack material provided by the invention is acquired; the temperature of the double-screw extruder is at 160-230 DEG C. The anti-track uvioresistant ADSS optical cable jack material can serve as the jack material special for 220KV and above ADSS optical cable, can realize high-altitude suspending remote conveying, can resist corona and electric track, can resist ultraviolet irradiation, can bear the cold environment test under wind, rain, snow and frost environments and has excellent physical and mechanical properties.

The invention discloses a heat-conducting silicone grease composition which is prepared from methyl ethoxy silicone oil, hexagonal boron nitride, aluminum oxide, scrap rubber nano-powder, a silane-based quaternary ammonium salt phase transfer catalyst, organic silicone oil, a silane coupling agent, an organic siloxane surface modification agent, an antioxidant 168 and an antioxidant 1010. According to the heat-conducting silicone grease composition, a product is high in performance cost ratio by compounding the hexagonal boron nitride, the aluminum oxide and the scrap rubber nano-powder as heat-conducting insulating fillers; in addition, the scrap rubber nano-powder with a small particle diameter can be used for enhancing the flowability of the product in a preparation process and filling a gap to obtain larger heat-transfer specific surface area, so that a final heat-conducting silicone grease composition product has the advantages of excellent heat conductivity, electrical insulation, weather resistance, hydrophobicity, physiological inertia and less surface tension, lower viscosity-temperature coefficient, higher compression resistance and no corrosion effect, can be used for well filling the gap between an electronic element and a radiating fin and is a very good medium material of the electronic element.

The invention relates to fireproof rubber which comprises the following raw materials in part by weight: 100 to 150 parts of chloroprene rubber, 100 to 130 parts of natural rubber, 5 to 10 parts of zinc oxide, 2 to 5 parts of hydrogen silicon oil, 2 to 5 parts of stearic acid, 15 to 30 parts of magnesium hydroxide, 2 to 5 parts of an accelerant, 2 to 5 parts of a vulcanizing agent, 3 to 10 parts of aluminum phosphate, 3 to 10 parts of sodium silicate, 3 to 10 parts of silicon carbide, 1 to 5 parts of an anti-aging agent, 5 to 10 parts of calcium carbonate, 1 to 5 parts of hydroxyl silicone oil, 1 to 5 parts of dimethicone and 1 to 5 parts of dibutyl phthalate. The fireproof rubber has good fire resistance, can perform a certain protection effect in a big fire and can reduce loss which is caused by the big fire and is brought to people.

The invention relates to an antifreeze liquid resisting water pump gasket and a preparation method of the antifreeze liquid resisting water pump gasket. The antifreeze liquid resisting water pump gasket is prepared from a main material and an auxiliary material in parts by weight and is prepared from the following components in parts by weight: 100 parts of the main material, 3 to 15 parts of mica powder, 20 to 30 parts of kaolin, 10 to 20 parts of talcum powder and 5 to 10 parts of a coloring agent; the main material is prepared from an antifreeze liquid resisting hydroxyl silicone oil substance, butadiene styrene rubber and fibers at the mass ratio of (3 to 5) to 40 to (55 to 57); the antifreeze liquid resisting hydroxyl silicone oil substance is prepared from the following components in parts by weight: 30 to 40 parts of hydroxyl silicone oil, 2.5 to 3 parts of a vulcanizing agent, 2 to 3 parts of a vulcanizing accelerant and 1 to 3 parts of an anti-ageing agent. By researching antifreeze liquid, antifreeze liquid resisting materials are pertinently selected; all the raw materials have mutual effect through a special process, so that a prepared sealing gasket has good resilience rate, tensile strength and compression ratio, and also has an excellent antifreeze liquid resisting performance; the weight gain of the sealing gasket is less than 20 percent and the thickening rate of the sealing gasket is less than 10 percent within 22h at the temperature of 100 DEG C.

The invention provides a composite heat conductive material for LEDs. The heat conductive material comprises components in parts by weight as follows: 10-20 parts of organic silicone resin, 10-20 parts of branched silicone oil, 15-25 parts of linear silicone oil, 1-10 parts of an antioxidant, 10-20 parts of graphene, 5-15 parts of nanoscale heat conductive metal fibers, 15-25 parts of an inorganic filling material and 15-25 parts of 95% aluminum oxide ceramic fibers. Filling materials such as the graphene with excellent heat conductivity, mechanical and chemical stability and the like, the nanoscale heat conductive metal fibers and the like are introduced into organic silicone resin which is low in surface tension, low in viscosity-temperature coefficient, high in compressibility and high in gas permeability and the branched silicone oil which is long in service life, free of sun crack and hardening and good in heat conduction effect, all the components are matched scientifically and reasonably, and the prepared composite heat conductive material is excellent in aging performance, stable in property, good in heat resistance, good in heat conductivity and particularly applicable to LED lamps.

The invention belongs to the technical field of power and particularly relates to an improving process for the hydrophobicity of external insulation of power equipment. The improving process comprises the following steps: (1) roughening the surface of the power equipment; (2) preparing a viscous solution from 15-20 parts of fluoroethylenepropylene, 10-15 parts of vinyl-terminated silicon oil, 5-10 parts of dimethyl silicon oil, 5-10 parts of polyetheretherketone and 20-60 parts of a diluent, pouring a solution film with the thickness of 300-800mu m on the surface of the power equipment, and then, carrying out vacuum defoamation; (3) uniformly scattering 10-30 parts of hydrophobic nanopowder on the surface of the solution film in the step (2) by a sieve, keeping the scattering for 20-26h, and then, carrying out baking at 80-150 DEG C for 2-6h to form a film; and (4) removing residual powder on the surface of the film in the step (3) by flushing with clear water, and drying the film. The improving process disclosed by the invention is low in cost, safe and convenient to operate and high in adhesion strength of the film on the outer edge of the equipment and a substrate.

The invention provides tackifying resin. The tackifying resin is characterized by being prepared from, by weight, 100 parts of rosin resin, 0.1-80 parts of hydroxyl silane, 0-50 parts of alcohol, 0.2-0.4 part of a catalyst and 0.3-0.6 part of an antioxidant. The invention further provides a preparation method and application of the tackifying resin. The preparation method includes the following steps that 1, the raw materials are weighed; 2, the rosin resin is smashed, the antioxidant is added, stirring is conducted to dissolve the rosin resin, and heating is conducted until the rosin resin iscompletely dissolved; 3, the catalyst is added and disperses for 5 minutes, and then alcohol is added to react for 30 minutes; 4, hydroxyl silane is added dropwise to start esterification reaction; 5, when no water is discharged any more, vacuum decompression is conducted to distill off fractions with low boiling points; 6, cooling is conducted to discharge the tackifying resin. The tackifying resin has excellent bonding performance for materials with low surface energy, can independently serve as hot melt adhesive resin, can also be added into other hot melt adhesive systems to serve as a tackifying agent to be in mixed usage and can serve as a compatilizer in the hot melt adhesive systems.

The invention discloses silicon oil for a torsional vibration damper of an internal combustion engine. The silicon oil for the torsional vibration damper of the internal combustion engine is characterized in that methyl silicone oil and ferric acetylacetonate are mixed and stirred to form the silicon oil, and the mass fraction of the ferric acetylacetonate is 0.1-0.3% of the methyl silicone oil. The silicon oil has the advantages that the ferric acetylacetonate with the specific mass fraction is added into the methyl silicone oil and is uniformly mixed, compared with a methyl silicone oil which is not add the ferric acetylacetonate components, the gelatinization temperature of the methyl silicon oil added with the ferric acetylacetonate and the methyl silicon oil not added with the ferricacetylacetonate is measured, a gel is generated at the temperature of 250 DEG C for 10 hours in the prior art, the methyl silicone oil mixed solution with 0.1%-0.3% of the ferric acetylacetonate of the invention is added, gelation does not occur yet after 60 days * 24 = 1440 hours at the temperature of 250 DEG C, when the mass percent of the doped ferric acetylacetonate is changed between 0.1-0.3%, the viscosity-temperature coefficient changes between 0.61-0.62, the viscosity-temperature coefficient is basically the same as that of the methyl silicone oil, and the silicon oil is completely suitable for a torsional vibration damper product of the internal combustion engine.

The invention relates to a cable material, in particular to a low temperature-resistant PVC (Polyvinyl Chloride) cable material and a preparation method thereof. The low temperature-resistant PVC cable material is prepared from the following components in parts by weight: 100 parts of PVC resin, 20 to 35 parts of organosilicone resin, 30 to 45 parts of silicone oil, 15 to 30 parts of white carbonblack, 20 to 45 parts of nano calcium carbonate, 3 to 8 parts of acid-binding agent, 1 to 3 parts of lubricating agent and 1 to 3 parts of antioxidant. The low temperature-resistant PVC cable materialdisclosed by the invention has the following beneficial effects that (1) through a plasticizing effect of the organosilicone resin and the silicone oil, low temperature resistance of the low temperature-resistant PVC cable material can be effectively improved; (2) a formula and a preparation technology of the low temperature-resistant PVC cable material are simple, are low in cost, are capable ofproducing without changing existing equipment and are suitable for large-scale production; (3) the obtained low temperature-resistant PVC cable material also is good in mechanical property, weather fastness and flame resistance.

The invention relates to a new radiation-proof material. The new radiation-proof material is used to make a TV main board and/or a power board, the TV main board and/or the power board comprises a radiation-proof layer, a bonding layer and a heat dissipation layer in order from inside to outside, and the radiation-proof layer is pasted with the heat dissipation layer into one through the bonding layer. The chemical composition of the radiation-proof layer is: polyvinyl chloride; organosilicon; cis-polybutadiene; silk fiber; a waterborne acrylic emulsion; silver powder; a compatibilizer; a plasticizer; a thermal stabilizer; and an antioxidant, wherein a mass ratio of polyvinyl chloride to the silk fiber to the silver powder is 5-9:1:1-1.5, the antioxidant is a mixture of zinc dialkyl dithiophosphate and zinc dialkyl dithiocarbamate mixed according to 1:1, and a mass ratio of the organosilicon to the cis-polybutadiene to the waterborne acrylic emulsion is 1:1:0.8. The new radiation-proofmaterial can effectively prevent electromagnetic wave radiation, can avoid an excessive thickness of the TV main board and the power board, and at the same time can ensure the strength, so that the performance of the TV main board and the power board is greatly improved.

The invention discloses a formula of a negative ion antibacterial antimite sponge, the negative ion antibacterial antimite sponge is prepared from the following raw materials: 85-90% of a sponge solution, 6-7% of an antibacterial agent, 2-6% of negative ion powder and 1-3% of a blowing promoter, the sponge solution is prepared from the following raw materials: 5-10% of silicone oil, 75-80% of polyester resin, 3-10% of fiber and 2-5% of a resin binder, The negative ions are confirmed to be an effective means for purifying air during use of thenegative ion antibacterial antimite sponge , and the antibacterial agent has the functions of killing germs and preventing bacteria breeding, so that the sponge has the effects of promoting metabolism of a human body, improving the immunity of the human body, enhancing the muscle energy of the human body, regulating the functional balance of the human body, resisting bacteria and preventing mite breeding; and the silicone oil has heat resistance, electrical insulating property, weather resistance, hydrophobicity, physiological inertia and small surface tension, so that the surface of the sponge prepared according to the formula is smoother, the pore diameter of bubbles in the sponge is reduced, and the elasticity of the sponge is better.

The invention discloses a microemulsion demolding brightener, and aims to solve the technical problems that in the prior art, oil stains and oxidized and unoxidized surface impurities remaining on the surface of a mold cannot be removed, the glossiness of the mold cannot be maintained, burrs exist on the surface of a finished product, and the texture of the finished product is reduced. The demolding brightener comprises the following components in parts by weight: 50 to 200 parts of paraffin, 100 to 200 parts of silicone oil, 50 to 80 parts of an emulsifier, 100 to 150 parts of borax, 200 to 300 parts of glass powder, 70 to 150 parts of a surfactant, 10 to 30 parts of an alkaline agent, 10 to 30 parts of ethylparaben, 60 to 100 parts of deionized water, 30 to 50 parts of a defoaming agent, 100 to 200 parts of a mixed copolymer, 50 to 100 parts of polymerized olefin, 80 to 160 parts of saccharin sodium salt, 30 to 60 parts of ethoxylated butynediol and 30 to 60 parts of copper sulfate. And 10-30 parts of sodium dodecyl benzene sulfate. The demolding brightener adopts the silicone oil and the paraffin as main materials, so that the demolding brightener has a better demolding effect, the glossiness of a finished product is ensured, the demolding brightener is prevented from going bad, the scratch resistance of the demolding brightener is improved, and bubbles in the demolding brightener are effectively reduced.

The invention relates to the technical field of packaging materials, in particular to a high-strength wear-resistant composite packaging material and a preparation method thereof. The high-strength wear-resistant composite packaging material is prepared from, by weight, 80-120 parts of chlorinated butyl rubber, 60-80 parts of polyvinyl chloride resin, 20-40 parts of carbon nanofibers, 4-8 parts of graphene, 8-12 parts of glass fibers, 18-22 parts of carbon fibers, 16-20 parts of ultra-high molecular weight polyethylene fibers, 3-9 parts of plasticizer, 4-8 parts of methyl silicone oil. 8-12 parts of bamboo fiber, 4-8 parts of a compatibilizer. Through the carbon nanofibers, the glass fibers, the carbon fibers and the ultra-high molecular weight polyethylene fibers, the strength, the stability and the wear resistance of the composite packaging material can be relatively high; and through the methyl silicone oil and the bamboo fibers, the composite packaging material has excellent heat resistance, electrical insulating property, weather resistance, hydrophobicity, physiological inertness and small surface tension, and also has a low viscosity-temperature coefficient and high compression resistance, so that the overall using effect is better.